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Apparatus, system and methods for enabling linearity improvement in voltage controlled variable capacitors

An embodiment of the present invention provides an apparatus, comprising at least one anti-parallel pair VVC network comprised of two parallel VVCs with one biased in the opposite polarity of the other and at least one anti-series VVC network comprised of two VVCs configured in series, one biased in the opposite polarity of the other such that the resulting AC capacitive variations produce a desired capacitance variation.




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Mechanically controlled variable capacitors for impedance tuners

An improved grounding technique for mechanically adjustable rotary capacitors uses a directly grounded bronze sliding contact to effectively and continuously ground the rotating comb-like blades of the capacitor. RF measurements of the continuity and repeatability of the capacitance settings prove the suitability of the modified capacitors for using in pre-calibrated multi-capacitor MHz range impedance tuners.




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Data processing apparatus, data processing system, method for controlling data processing apparatus, method for adding data converting function, program and medium

A data processing apparatus is monitoring the first port of itself and the second port of itself. If the data processing apparatus receives data via the second port, it conducts a specific process to the data regardless of a data format of the data so as to convert the data into the data format that can be processed regardless of a data format of the data and sends converted data to the first port.




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Backlight unit with controllers of air and fluid and display device having the same using two different lights

Provided are a backlight unit and a display device having the same. The backlight unit includes a case having an opening, at least one lamp assembly disposed on a side surface of the case and including a light source, an optical transreflective unit on the case, the optical transreflective unit transmitting a portion of first light passing through the opening and reflecting a portion of second light generated from the light source, and an optical sheet including a first diffusion unit on the optical transreflective unit.




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Mutualistic engine controller communicating with printer non-volatile memory

A printing device includes at least one printing engine that has actuators and sensors. At least one engine controller is operatively connected to the printing engine, the engine controller uses software to control operations of the printing engine. At least one non-volatile memory is operatively connected to the engine controller. The non-volatile memory stores values used by the engine controller to control operations of the printing engine. Further, at least one adapter card is operatively connected to the non-volatile memory and to the actuators and sensors. The adapter card stores data and receives sensor feedback from the sensors. The adapter card uses the data and the sensor feedback to control the actuators by bypassing the engine controller when communicating with the actuators. The adapter card provides adapter card feedback to the non-volatile memory.




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Orientation controller, mechanical arm, gripper and components thereof

A jointed mechanism including a segment coupled to a joint; and an elongated component coupled to the segment, where applying a pulling force to the elongated component rotates the segment around the joint, elastically deforming the elongated component; wherein the elastic deformation generates an elongated component elastic force sufficient to rotate the segment, in an opposite direction, in absence of the pulling force.




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Target apparatus utilizing laser light to actuated target advancement with a supportive backing allowing targets of inexpensive or recycled roll paper

Shooters must presently take their firearms out of their hands to then manually actuate a new target into shooting position. This Target Apparatus will allow the shooter to shine his laser light, infrared light, flashlight, or multi-spectrum light onto a Target Apparatus-mounted sensor that engages a drive means mounted upon the target frame that then forwards a new target into position without removing the firearm from its' shooting position. The unit also uses a unique target backing material that does not require targets to be made of rolls of coated or heavy material stock. The system can utilize rolls of cash register paper, cut sections of gift wrapping paper, hand towel rolls, or even paper towels as target materials without snagging and preventing the next target from being presented.




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Banking machine controlled responsive to data read from data bearing records

A banking system operates responsive to data read from data bearing records. The system includes an automated banking machine comprising a card reader. The card reader includes a movable read head that can read card data along a magnetic stripe of a card that was inserted long-edge first. The card reader includes a card entry gate. The gate is opened for a card that is determined to be properly oriented for data reading. The card reader can encrypt card data, including account data. The card data is usable by the machine to authorize a user to carry out a financial transfer involving the account.




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Banking apparatus controlled responsive to data bearing records

A banking system is controlled responsive to data read from data bearing records. The banking system includes an automated banking machine. The machine is operable to carry out a financial transaction for a person responsive to a determination that the person is an authorized user of the machine based on correspondence between identifying data read by a reader of the machine and data store information. The machine includes a check acceptor that is operative to receive checks from authorized machine users. The check acceptor is operable to continuously move a received check along its transport path while simultaneously rotationally orienting the check into alignment with the transport path. A check determined not to have at least one property of an acceptable check is returned to the machine user. Acceptable checks are processed and stored in the machine.




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Method and apparatus for controlling illumination

A method includes transmitting from at least one of the imaging sensors to a controller a short frame data that is collected by the at least one of the imaging sensors when the illumination source is activated to provide the illumination light toward the target object with a first illumination level. The method further includes transmitting subsequently from the at least one of the imaging sensors to the controller a regular frame data that is collected by the at least one of the imaging sensors when the illumination source is activated to provide the illumination light toward the target object with a second illumination level that is determined based upon the short frame data. The size of the regular frame data being at least 50 times larger than the size of the short frame data.




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Method and apparatus for reducing vehicle rollover

A sensor detects force or other indications of an impending rollover of a motorized land vehicle. Upon detection of a threshold force value, the sensor actuates an applicator that delivers traction reducing fluid to the contact patch between at least one of the vehicle tires and the ground. The vehicle is enabled to dissipate the rollover inducing force by sliding laterally in preference to rolling over.




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Apparatus and method for controlled application of railway friction modifying agent

A system and method for controlling an application of a friction modifying agent to an area of contact between a railway wheel and a railway rail over which the wheel is traversing to selectively modify the coefficient of friction at the contact area. A sensor is used for detecting a parameter relating to the operation of the railway train. A controller is responsive to the sensor for selecting one or more of a plurality of friction modifying agents and controls the application of the agent to the rail as a function of the parameter. An applicator is responsive to the controller and applies the friction modifying agent to the area of contact between the railway wheel and rail. A second application of the agent may be predicated upon the effectiveness of a first application of the agent. The selection of the appropriate agent may include a consideration of a current location of the railway vehicle.




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Conditioning device and method for drying and controlling the temperature of a ballast bed

Conditioning device (24) and method for drying and/or controlling the temperature of a ballast bed (12) of a railway track system (10), wherein the railway track system (10) has sleepers (14) resting on the ballast bed (12) and rails (16) resting on the sleepers, wherein the conditioning device has a bogie (30) for moving the conditioning device (24). An outlet nozzle (36) for blowing temperature-controlled air into the ballast bed (12) via at least one blowing-in region (26) positioned between two adjacent sleepers (14) is connected to the bogie (30), as is at least one cover plate (42) for essentially air-tight coverage of an upper side, pointing essentially in the direction counter to the direction of gravity, of a side strip (20), provided next to the sleepers (14) in the direction of travel, of the ballast bed (12). In a method for drying and controlling the temperature of a ballast bed (12) of a railway track system (10), an upper side of the ballast bed (12) and/or at least one sleeper (14) and at least one rail (16) are sealed in an essentially air-tight fashion outside a blowing-in region (26) before temperature-controlled air is blown into the ballast bed (12) via the blowing-in region (26).




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Catalytic reactor including one cellular area having controlled macroporosity and a controlled microstructure and one area having a standard microstructure

The invention relates to a catalytic reactor including: at least one first architecture/microstructure including a ceramic and/or metal cellular architecture having a pore size of 2 to 80 ppi and a macroporosity of more than 85%, and a microstructure having a grain size of 100 nm to 5 microns, and skeleton densification of more than 95%, and a catalytic layer; and at least one second architecture/microstructure including a spherical or cylindrical architecture having a pore size of 0.1 to 100 μm and a macroporosity of less than 60%, and a microstructure having a grain size of 20 nm to 10 μm and a skeleton densification of 20% to 90%, and a catalytic layer; the first and second architecture/microstructure being stacked inside said reactor.




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Storage apparatus and storage controller of storage apparatus

Storage apparatus configured to provide an external apparatus with logical storage area as data storage area, the storage apparatus having a physical storage medium configured to generate the logical storage area, and storage controller communicatively coupled to physical storage medium to control data input/output processing between the external apparatus and the logical storage area, wherein the storage controller includes circuit package including circuit board which implements predetermined function of storage controller and a circuit board case to accommodate the circuit board, plurality of cooling fan units that generate cooling air for cooling circuit component mounted on the circuit board of the circuit package, and a chassis having a structure for accommodating the circuit package and the cooling fan units, some of circuit packages are inserted to be accommodated in chassis from opening thereof and are arranged side by side across width direction of chassis.




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Under mount roller for crisper system

A refrigerator is provided that includes a crisper system having one or more moveable and removable drawers. The drawers include rollers extending downwardly and outwardly from the drawers to provide maximum storage volume. The rollers are configured to work with channels formed in a support system, which may be integrally formed with a bottom floor of a compartment of the refrigerator. Therefore, the rollers and channels of the support system provide easy access and removability of the drawers of the crisper system.




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Stroke controller for a key duplicator

A stroke controller is mounted on a key duplicator and has a base, a drive shaft, a knob and a driven shaft. The base has a longitudinal shaft hole and a transverse shaft hole. The drive shaft is mounted rotatably through the transverse shaft hole. The knob is mounted on the drive shaft and has a drive gear. The driven shaft is mounted slidably through the longitudinal shaft hole and has a rack section engaging the drive shaft so that rotating the knob drives the driven shaft to slide relative to the base. The stroke controller precisely controls the movement of an original key and a key workpiece clamped on the key duplicator to manufacture a fine key duplicate.




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Radiographing system, method of controlling automatic exposure in radiographing system, and radiological image detection device

A compensation circuit 76 of an AEC unit 67 of an electronic cassette 13 defines the detection signal of a detection pixel 65 of the electronic cassette 13 as a detection signal corresponding to the detection signal of an old AEC sensor 25. The compensation circuit 76 performs compensation so as to exclude the influence on the detection signal due to a difference in the configuration of an intermediate member disposed between an X-ray source 10 and an FPD 35 of the electronic cassette 13 when the detection pixel 65 is used as an AEC sensor instead of the old AEC sensor 25. The detection signal is transmitted from a detection signal I/F 80 to a detection signal I/F 26 of a source control device 11 as it is (instantaneous value) or as an accumulated value obtained using an integration circuit 77.




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Method and system for controlling skill acquisition interfaces

A method and system for capturing expert behavior that the expert is not even necessarily conscious of, such as gaze patterns, that are tied to positive outcomes, and to create a catalog (e.g. database) of these behaviors. The system compares the current behavior of a person, for example a novice, against this catalog of expert behaviors. If the current behavior is significantly different, the system would adapt various aspects of the interface to bring the current behavior closer in line to that of the expert.




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System and method for upgrading the functionality of a controlling device in a secure manner

Secure access to a database of upgrade data is provided by storing an encryption key value in a cable used to interconnect a first device and a second device that is associated with the database of upgrade data. The second device allows access to the database of upgrade data via the cable only when the cable is first positively authenticated by the second device through use of the encryption key value stored in the cable.




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Very low intermediate frequency (VLIF) receiver and method of controlling a VLIF receiver

A very-low intermediate frequency (VLIF) receiver and a method of controlling a VLIF receiver. The method comprises receiving a first signal, the first signal including one or both of an on-channel signal portion and an adjacent channel interferer (ACI) portion; determining that the first signal includes a portion having a strength that is above a threshold; in response to determining that the first signal includes a portion having a strength that is above the threshold, estimating one or more IQ imbalance parameters for at least a portion of the first signal; and compensating for an IQ imbalance in at least the portion of the first signal using the one or more IQ imbalance parameters.




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Weighted N-finger scaling and scrolling

In one example, a method includes receiving an indication of an input gesture detected at a presence-sensitive input device, where the input gesture includes one or more input points and each input point is detected at a respective location of the presence-sensitive input device. The method may also include determining a focal point of the input gesture, and determining a radius length. The method may also include determining a shape centered at the focal point and having a size determined based on the radius length. The method may also include responding to a change in a geometric property of the shape by scaling information included in a graphical user interface, where the scaling of the information being centered at the focal point.




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System and method for controlling output of a battery pack

Systems and methods for controlling the output of a battery pack are disclosed. In one example, a battery pack contactor is opened in response to battery pack current. The system and method may reduce battery pack degradation and increase system flexibility.




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Method for transferring energy between at least two energy storage cells in a controllable energy store

In a method for transferring energy between at least two energy storage cells in a controllable energy store that serves to control and to supply electrical energy to an n-phase electric machine, which energy store has n power supply arms which each have at least two series-connected energy storage modules which each include at least one electrical energy storage cell with an associated controllable coupling unit, and are connected to one respective phase of the electric machine, in a charging phase, all coupling units of those energy storage modules which are to be used as an energy source are controlled in such a way that the respectively associated energy storage cells are connected into the respective power supply arm.




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Battery pack and method of controlling the same

A battery pack, and a method of controlling the battery pack are disclosed. The battery pack detects consumption current when a load is not turned on, and shuts off power when a load is turned off or in stand-by mode, thereby preventing consumption current of the load from flowing.




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Charging apparatus and method for controlling charging apparatus

A charging apparatus including a charging unit adapted to charge, in a non-contact manner, an apparatus to be charged placed in a charging region, a detector adapted to detect a charged state of the apparatus to be charged placed in the charging region, and a controller adapted to change a mode of the apparatus to be charged to a mode that inhibits vibration, according to the charged state detected by the detector.




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Energy storage system and method of controlling the same

An energy storage system and a method of controlling the same is provided. The energy storage system may directly provide generated DC power or DC power stored in a battery to a DC load without performing a DC/AC conversion or an AC/DC conversion. Furthermore, in the case where a grid operates abnormally (e.g. power interruption) and the energy storage system functions as an uninterruptible power supply (UPS), power stored in a battery may be selectively provided to loads according to power remaining in a battery, and thus stored power may be used stably.




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Battery controller, battery control method and program

There is provided a battery controller including a storing unit which stores an upper limit voltage and a lower limit voltage, each defining a first voltage range in which a battery is charged/discharged, and a second upper limit voltage and a second lower limit voltage, each defining a second voltage range which is wider than the first voltage range, and a charge/discharge regulation unit which temporarily changes, when charge/discharge is performed in the first voltage range and permission for charge/discharge in the second voltage is received, setting of the battery such that charge/discharge is performed in the second voltage range.




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Control system of wind power generator, wind farm, and method for controlling wind power generator

A wind power generator generates power through a rotation of a rotor and is interconnected, and operated with its power generation output previously limited in order to be able to further supply the power to a power system in response to a decrease in system frequency. Thus, a concentrated control system derives a required restricted amount corresponding to a power generation output required to respond to the decrease in system frequency, derives a value by subtracting an amount corresponding to a latent power generation output with which the power generation output can be increased, from the required restricted amount, and sets a restricted amount of the power generation output in each wind power generator to perform the operation with the power generation output previously limited to respond to the decrease in system frequency, based on the above value.




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Magnetic controlled power generator

A magnetic controlled power generator provides a magnetic controlled loading device, power generator and flywheel device to form two independent modules which are easily assembled and disassembled for easy manufacture and maintenance. Besides, the magnetic controlled power generator has simple installation and lightweight components to generate a radial displacement for magnetic flux control, achieving continuous adjustment of the load resistance, thereby having the effect of reducing the cost and weight.




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Method of controlling speed of a variable speed generator

Some embodiments relate to a method of controlling speed of a variable speed generator. The method includes detecting a load of the variable speed generator and determining a target speed for the variable speed generator based on the load supplied by the variable speed generator. The method further includes using a controller to adjust the speed of the variable speed generator based on the target speed. The method may further include correcting the target speed by calculating a correction factor that corrects the target speed based on a voltage produced by the variable speed generator.




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Method of operating a wind turbine, wind turbine, wind turbine controlling system, and processing system

According to an embodiment, a method of operating a wind turbine comprising a DC-to-AC voltage converter is provided, the wind turbine being connectable to a grid via the DC-to-AC voltage converter, the method comprising: determining a line voltage of a power line connecting the DC-to-AC voltage converter to the grid; if the determined line voltage exceeds a predefined voltage threshold value, injecting reactive current into the power line, wherein the amount of reactive current injected is chosen such that an output voltage of the DC-to-AC voltage converter is kept within a predetermined voltage range.




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Method of controlling rotating main field converter

A generator system includes a generator having a stationary portion and a rotating portion. An exciter field winding and a main armature winding are disposed on the stationary portion. An exciter armature winding and a main field winding are disposed on the rotating portion. A frequency demodulator is configured to extract a frequency modulated control signal from the exciter armature winding and to demodulate the frequency modulated control signal to generate a demodulated control signal. The generator includes a main field rotating power converter to selectively control current in the main field winding in response to the demodulated command signal. The generator system includes a generator control unit in electrical communication with the generator to monitor the output voltage at the main armature winding and to output an exciter current including the frequency modulated control signal to the exciter field winding based on the output voltage.




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Rolling stock system and control method thereof

A breaker 162 is opened when a pantograph 101 is lowered. The pantograph 101 is connected to an overhead wire 200. Voltage and its phase of the overhead wire are detected by a detector 161. Power is supplied from a power storage device 150c to a tertiary winding 112c via a power converter 14c such that a primary side of the main transformer 110 has the same voltage and phase as the overhead wire so as to reversely excite the main transformer 110. When the voltage of the main transformer 110 has the same phase as the voltage of the overhead wire 200, the breaker 162 is turned on and then the pantograph 101 is raised, to connect the overhead wire 200 and the main transformer 110 to each other, thereby preventing the occurrence of an excitation inrush current to the main transformer 110.




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Method of controlling combustion of gas appliance

A method of controlling combustion of a gas appliance includes the following steps: a) Read a first burning data in a database; b) Burn gas according to the first burning data; c) Obtain a burning efficiency of the gas appliance; and d) Compare the burning efficiency with a predetermined value, and repeat the step b to the step d when the burning efficiency is higher than the value, or read a second burning data in the database and burn gas according to the second burning data when the burning efficiency is lower than the value. The present invention provides plural stages of burning according to the main component of the gas to be burned to increase the total burning efficiency.




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Controlled shock animal training device

A controlled shock animal training device is shown which includes a mounting collar for mounting the device about a portion of the animal's body. The strap has a pair of electrical contacts which are spaced apart on the mounting strap. An electrical circuit, carried on the mounting strap, connects the pair of spaced electrical contacts and provides a controlled voltage output through the contacts upon triggering of an electrical switch within the circuit. A foldable flap formed in the collar interrupts the electrical circuit during installation of the collar. The shock provided is of limited duration and controlled intensity and requires that the electrical switch be opened and then reclosed to repeat the shocking operation.




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Electrified livestock controller

An electrified livestock controller for guiding animals, preferably pigs, doubles as a gate and a prod. The controller comprises a central panel of generally planar dimensions, comprising a plurality of central, vertically disposed ribs separated from one another by elongated slots. One or more similar accessory panels are hingedly connected to each side of the central panel. The hinge structure facilitates adjustment of the controller for deployment in a variety of configurations. The hinge structure comprises a detent system having a plurality of indexing disks which, when yieldably mated together, facilitate positioning of the panels in a custom configuration. Suitable flush mounted electric strips are defined on all of the ribs, to provide a shocking effect without tissue damage. The system includes a removable cattle prod which, besides functioning as a handle, can be withdrawn from the handle to separately prod animals. Either concurrently with or independently of rib electrification, audio and/or visual effects may be generated to cause Pavlovian conditioning in the animals. A preferred visual effect of ascending motion, which may be induced by a revolving curtain displaying a spiral image, motivates the animals like a prod. The curtain is best operatively disposed behind the vertical ribs of at least one of the panels.




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Computer-controlled common access cabinet

A control system for a common access cabinet having a plurality of drawers and electrically controlled latches. Each latch corresponds to one drawer and is configured to receive an electrical signal. The electrical signal contains an address assigned to a particular drawer. When a latch receives a signal that defines the address of the drawer to which that latch corresponds, the latch unlocks that corresponding drawer. The latches receive the signals over an asynchronous serial interface bus. A user input device receives user identification data that is processed by a processor device to determine if the user is authorized to access any of the drawers. If the user is authorized, the processor device generates a signal that contains an address that corresponds to a drawer identified in the user identification data. The signal is converted to an asynchronous serial signal which is routed to the asynchronous serial interface bus.




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Roll sheet supporting apparatus

A roll sheet supporting apparatus includes a pair of rotation shafts which are respectively fitted into end portions of the hollow portion of the core tube and configured to support the roll sheet rotatably and capable of being drawn out, an engaging member movable between a projecting position and a retracting position, wherein the engaging member projects from an outer circumferential surface of the each rotation shaft abutting on the core tube to engage with the core tube at the projecting position and retracts inward from the outer circumferential surface of the each rotation shaft at the retracting position, and an engaging member moving unit configured to move the engaging member between the projecting position and the retracting position.




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Coiled roll container

A coiled roll container including a base having opposed one and other sides and an outlet slot through which an edge of the coil roll extends. A pair of elastic cords each having opposed one and other ends is provided with the one end fixed at one side of the base and the other end releasably attached to the other side of the base. The elastic cords are for looping over the coiled roll to secure the coiled roll in place. The container also includes a cord locking mechanism at the other side of the base for receiving and securing the elastic cords about the coil roll.




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System for controlling air flow within an agricultural product metering system

A system for controlling air flow within an agricultural product metering system is provided. One system for distributing an agricultural product includes an air conveyance system having a blower configured to provide an air stream for moving metered product toward a distribution device. The air conveyance system is mounted on an air cart. The system also includes control circuitry mounted on an agricultural vehicle, and configured to adjust a speed of the blower based at least partially on a product flow rate from the air cart.




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Vibratory ripper having pressure sensor for selectively controlling activation of vibration mechanism

A ripping mechanism for a vehicle has a support frame. A ripping member has an engagement head that is configured for plowing a groove in the ground. The ripping member is preferably positionable in a selected working position and working orientation by adjustment of the support frame. The ripping member is preferably movable relative to the support frame to cause reciprocating movement of the engagement head at least partially longitudinally. A tilt adjustment cylinder is preferably operable to orient the ripping member in the selected orientation. A vibrator mechanism is preferably operatively connected to the ripping member and activatable to cause reciprocating movement of the engagement head at least partially longitudinally.




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Wrist/arm/hand mounted device for remotely controlling a materials handling vehicle

A supplemental control system for a materials handling vehicle comprises a wearable control device, and a corresponding receiver on the materials handling vehicle. The wearable control device is donned by an operator interacting with the materials handling vehicle, and comprises a wireless transmitter to be worn on the wrist of the operator and a travel control communicably coupled to the wireless transmitter. Actuation of the travel control causes the wireless transmitter to transmit a first type signal designating a request to the vehicle. The receiver is supported by the vehicle for receiving transmissions from the wireless transmitter.




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System and method for controlling a rotation angle of a motor grader blade

The disclosure describes, in one aspect, a system and method for controlling a rotation angle of a blade of a motor grader having a front frame operatively coupled to a rear frame at a point defining an articulation angle between the front and rear frames. The control system includes at least one sensor operatively associated with the blade, at least one sensor operatively associated with a wheel, at least one sensor operatively associated with at least one of the front frame or the rear frame, and a controller operatively coupled to the at least one sensors. The controller is adapted to determine a current position of the blade, determine a wheel steering angle, determine an articulation angle, and control the rotation angle of the blade based in part on the wheel steering angle and the articulation angle.




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Foldable stroller

A stroller has a first frame part and a second frame part capable of movement between at least two positions relative to the first frame part. A push-pull mechanism has a push-pull element that directly or indirectly connects the first and second frame parts. Moving the first frame part causes the push-pull mechanism to move the second frame part. The mechanism can be employed on the stroller frame to assist in folding and/or unfolding the stroller.




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Lifting trolley

The present invention relates to a trolley, and more particularly to a lifting trolley capable of raising and lowering goods. The lifting trolley includes a trolley frame, a drive mechanism, and a bearing mechanism. The bearing mechanism is vertically slidably connected to the trolley frame, and the drive mechanism is disposed on the trolley frame and drives the bearing mechanism to slide vertically. Compared with the prior art, the lifting trolley provided by the present invention saves time and effort, is accurate in positioning, and facilitates conveying of goods.




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Rolling cutter placement on PDC bits

A cutting tool cutting tool may include a tool body having a plurality of blades extending radially therefrom; and a plurality of rotatable cutting elements mounted on at least one of the plurality of blades, wherein the plurality of rotatable cutting elements are mounted on the at least one blade in a nose and/or shoulder region of the cutting tool at a side rake angle ranging from about 10 to about 30 degrees or −10 to about −30 degrees.




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Directional drilling attitude hold controller

An attitude hold controller method includes receiving at a navigable apparatus a demand inclination and a demand azimuth with respect to a global coordinate system and determining at the navigable apparatus a demand attitude vector according to the received demand inclination and the demand azimuth. Determining at the navigable apparatus a current navigable apparatus attitude vector. Evaluating a control law using the current navigable apparatus vector and the navigable apparatus demand attitude to derive a control law tool face, converting the control law tool face to an equivalent tool face, and applying the equivalent tool face with the navigable apparatus to control the navigable apparatus attitude.




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Method and apparatus for controlling rock drilling

Method and apparatus for controlling rock drilling with a percussion device belonging to a rock drill to deliver stress waves to rock through a tool by pushing the tool against the rock by means of a feed motor and rotating simultaneously the tool by means of a rotation motor, whereby the maximum feed force is determined, pressure medium is supplied to the feed motor and to the rotation motor and the feed force is controlled according to the drilling conditions. The feed force is controlled on the basis of the feed speed and the rotation torque. The apparatus has a load control valve which controls the feed.




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High-shear roller cone and PDC hybrid bit

A drill bit having a bit body, at least one blade extending radially from the bit body, a plurality of blade cutting elements disposed on each blade, at least one journal extending downwardly and radially outward from a longitudinal axis of the drill bit, a roller cone or roller disc mounted rotatably to each journal, and a plurality of cutting elements disposed on each roller cone or roller disc, and methods for making the drill bit are disclosed.