A flip-flop includes: a first, second, third, and fourth transistors; input terminals; and first and second output terminals, the first and second transistors constituting a first CMOS circuit such that gate terminals are connected and drain terminals are connected, the third and fourth transistors constituting a second CMOS circuit such that gate terminals are connected and drain terminals are connected, the first output terminal connected to a gate side of the first CMOS circuit and a drain side of the second CMOS circuit, the second output terminal connected to a gate side of the second CMOS circuit and a drain side of the first CMOS circuit, at least one input transistor included in the group of the first through fourth transistors, a source terminal of the input transistor being connected to one of the input terminals. This can provide a further compact flip-flop.

A shift register unit comprises: a first transistor, a pulling-up close unit, a pulling-up start unit, a first pulling-up unit, a second pulling-up unit, a trigger unit, and an output unit. A shift register circuit, an array substrate and a display device are also provided. The shift register unit, the shift register circuit, the array substrate and the display device can reduce drift of a gate threshold voltage of a gate line driving transistor and improve operation stability of devices.

An LCD and a bidirectional shift register device thereof are provided. The bidirectional shift register device of the invention is disposed on the substrate of the panel and includes multi-stages shift registers in series connection. Each stage shift register includes a pre-charging unit, a pull-up unit and a pull-down unit, in which the pre-charging unit receives a first preset clock signal and the output from a (i−1)th stage shift register or a (i+1)th stage shift register so as to thereby output a charging signal. The pull-up unit receives the charging signal and a second preset clock signal so as to thereby output a scan signal. The pull-down unit receives the second preset clock signal, a third preset clock signal and the output from the (i+2)th stage shift register or the (i−2)th stage shift register so as to decide whether or not pulling down the scan signal to a reference level.

An improved captive beam decking system is disclosed for use in a cargo trailer. The system includes a beam assembly and a foot assembly that is selectively engagable to a vertical sliding track system. The sliding track system is attached to the sidewall of a trailer vertically. The beam can be easily moved at different heights that are selected based upon the configuration of the cargo trailer.

An edge protector for insertion between a load to be lifted and a lifting member which facilitates the lifting of the load, preventing damage to either the load or the lifting member. The edge protector has a pair of flanges which extend from a radiused or curved center portion. Each flange has an inner surface and an outer surface. A portion of each respective outer surface of each flange is spaced from and is essentially parallel to the inner surface of the respective flange.

There is provided a multi power supply type level shifter. The provided multi power supply type level shifter includes a first level shifter and a second level shifter in a two-stage architecture so as to selectively receive first to third power supplies and change a signal level, even when the first to third power supplies are applied in a different sequence from a normal power-on sequence. Output voltages are output without a change in level, and short-circuit currents are not generated in the first and second level shifters.

A level shifter, or method, producing a final output from a driver supplied by a high-side source driver providing VDD or common, and a low-side source driver providing common or VSS. A delay is introduced to prevent a source driver output at common from beginning to transition toward a supply rail until a delaying source driver at a rail begins transitioning toward common. The level shifter may be single-ended or differential, and the delaying source driver may be coupled to the same final output driver as is the delayed source driver, or may be coupled to a different final output driver. The level shifter may have a second level shifter front end stage, which may have high-side and low-side intermediate source driver outputs coupled by a capacitor, and/or may couple one of the supplies to all intermediate source drivers via a common impedance or current limit Zs.

There is provided a level shift circuit free from malfunction. The level shift circuit converts a signal of a first power supply voltage of a first supply terminal, which is supplied to an input terminal, into a signal of a second power supply voltage of a second supply terminal and outputs the converted signal to an output terminal. The level shift circuit has a control circuit that detects when the first power supply voltage reduces below a predetermined voltage. The voltage of the output terminal of the level shift circuit is fixed to the second power supply voltage or a ground voltage according to a detection signal of the control circuit.

A system and method are disclosed for level shifting a DDC bus with a low voltage loss. A pull up circuit includes an NMOS transistor, a PMOS transistor and resistor. An NMOS pull up gate is also included in line with the DDC bus. When powered, the level shifter adjusts the voltage of transmitted signals to match the voltage of a receiving device. The resulting adjusted is slightly lower due to a threshold voltage lost across one or more transistors. Additionally, when unpowered, the level shifter releases the signal transmission line. Unadjusted signals can then be transmitted without consumption of power by the level shifter.

An apparatus includes a light foil device configured to move based on radiation pressure associated with light received by the light foil device. The apparatus includes a mechanism configured to transition between operational states in response to the movement of the light foil device, or includes a valve configured to control a flow of material through a conduit based, at least in part, on the movement of the light foil device.

The invention discloses novel morphology shifting micelles and amphiphilic coated metal nanofibers. Methods of using and making the same are also disclosed.

A seating unit that includes a linkage mechanism adapted to move the seating unit between seat-lift, closed, extended, reclined, and seat-lift positions is provided. The linkage mechanism includes a seat-mounting plate mounted to a footrest assembly, a base plate fixedly mounted to a lift assembly, a back-mounting link rotatably coupled to the seat-mounting plate, a seat-adjustment assembly with a bellcrank, and a linear actuator for automating adjustment of the linkage mechanism. In operation, a stroke in a first phase of the linear actuator generates a force on the bellcrank that translates the seat-mounting plate rearward in a consistent angle of inclination and rotates the back-mounting link from a reclined to an upright orientation. A stroke in a second phase acts to collapse the footrest assembly. A stroke in a third phase causes the lift assembly to raise and tilt the seating unit, thereby accommodating egress and ingress of an occupant.

Methods and apparatus for computing the carrier frequency of a transmitter using frequency modulated digital data to compensate for frequency shifting of the transmitter and the receiver local oscillators and for bandwidth adjustment of the receiver's filter. In particular, methods and apparatus are disclosed for binary systems transmitting “1” and “0” data using decoded or undecoded received signals.

A blowout preventer (BOP) lifting apparatus has a reinforced frame and a gate for securing a BOP stack. The frame has a central U-shaped recess for securing a collared portion of the BOP stack. The gate pivotally swings between a closed position on the frame and an open position for installation and removal of the lifting apparatus from the BOP stack. An actuator has a first end connected to a top surface of the frame and a second end connected to the gate for actuating the opening and closing of the gate to the frame. When the gate is in the closed position, three locking pins are inserted into three vertical pinning holes located on the frame, which are aligned with three pinning holes located on the gate. The apparatus may be lifted via cables or other lifting mechanisms attached via lifting eyelets located on each corner of the frame.

A multipurpose tool and method usable to remove debris and/or other retentate from a skimmer basket or a filter associated with a swimming pool, and/or to remove the skimmer well lid and the skimmer basket and/or filter from a skimmer well. The tool comprises two elongate members pivotally connected, each elongate member having a protrusion connected thereto at one end and a handle at the other. Each elongate member can have a scooping element connected thereto. The protrusions can point away from each other and can be adapted to move away from each other in response to the handles being moved towards each other.

A vacuum-lifting device of variable configurations includes a first slat element, a second slat element, and four suction members. The first slat element is detachably fixed to the second slat element, and the first slat element intersects with the second slat element defining an intersection. A first slot is defined in the first slat element and a second slot is defined in the second slat element. Two of the four suction members are translatably secured in the first slot. The other two of the four suction members are translatably secured in the second slot.

A system for lifting a vehicle via multiple slings comprises a vehicle not engineered with structural facility to withstand lifting forces, including a frame which unmodified will deform in response to vertically imposed lifting forces, frame reinforcing elements affixed to the frame at selected locations which are subject to lifting deformation, at least two lifting members at spaced-apart forward frame locations, at least two lifting members at spaced-apart rearward frame locations, and a plurality of elongate slings extending respectively between each lifting member and a common lifting vertex. Each lifting member has an enlarged lower base portion rigidly affixed to the frame and an upper lifting portion. The frame reinforcing elements resist deformation of the frame in response to vertically imposed lifting forces. The enlarged base portions of the lifting members apply forces over a correspondingly enlarged area of the frame and the reinforcing elements without deforming the frame.

A vacuum-lifting device includes a holding block and a nozzle. The holding block defines a holding hole and a threaded hole communicating with the holding hole. The nozzle includes a first section that is slidably received in the holding hole and a second section. The second section extends from the first section and has an outer diameter smaller than an outer diameter of the first section.

A noise resistant switch control circuit is provided. The circuit includes a low pass filter configured to couple to a first terminal of a switch and a first voltage clamp coupled to the low pass filter. The first voltage clamp is configured to couple to a control terminal of the switch and limit a voltage of the control terminal relative to the first terminal to within a first clamping range. The circuit includes a second voltage clamp coupled to an input terminal of the switch control circuit. The second voltage clamp is configured to couple to the control terminal of the switch. The second voltage clamp is further configured to reduce a level of a control voltage coupled to the second voltage clamp. The circuit includes a bias device configured to couple to the control terminal of the switch and to impress a biasing voltage to the control terminal.

A server includes a casing, a bottom plate, a first hard disk module, a second hard disk module, and a lifting device. The bottom plate is disposed in the casing and configured to be sliding relative to the casing. The first hard disk module is movably disposed on the bottom plate. The first hard disk module includes a track. The second hard disk module is fixed on the bottom plate and disposed behind the first hard disk module. The lifting device moves up the first hard disk module when the bottom plate is pulled out of the casing, and the lifting device moves down the first hard disk module when the bottom plate is pushed into the casing. A drawer lifting device is also disclosed.

An embodiment of the invention provides a device for holding an article, wherein the device includes a front panel including a first aperture positioned above a second aperture. The first aperture is dimensioned to receive a display hook; and, the second aperture is dimensioned to receive and retain the article. A rear panel is hingedly connected to the front panel, wherein the rear panel includes a third aperture positioned above at least one fourth aperture. The third aperture is dimensioned to receive the display hook; and, the fourth aperture is dimensioned to receive and retain a second article. The device further includes a card removably connected to the rear panel via perforations.

Gift bags with removable, configurable and wearable parts and components have multiple interconnected panels which include a bottom panel and multiple interconnected generally vertically oriented side panels which together form a bag or container with an interior volume which is accessible through an opening. Incorporated into or attached to one or more of the side panels or bottom panel are articles or components, structures or objects which fit with one or more of the side panels. The articles, components, structures or objects are detachable from the one or more side panels. The removable components are preferably secured to or made integral with any of the side panels by structures, devices or materials by which the components are both structural; aesthetic, decorative or ornamental, yet also relatively easily detachable.

The invention involves a wind turbine comprising at least one blade (5) in turn comprising a blade body (501), lift-regulating means (502) adapted for movement in relation to the blade body (501) so as to regulate the lift of the blade, and load sensing means (5022, 506) for determining a load acting on the lift-regulating means (502), the wind turbine further comprising an actuation control unit (6) adapted to control the movement of the lift-regulating means (502) based on output from the load sensing means (5022, 506). In addition to output from the load sensing means (5022, 506), the actuation control unit (6) is adapted to control the movement of the lift-regulating means (502) based on the movement of the lift-regulating means (502).

A method and system provides for execution of calibration cycles from time to time during normal operation of the communication channel. A calibration cycle includes de-coupling the normal data source from the transmitter and supplying a calibration pattern in its place. The calibration pattern is received from the communication link using the receiver on the second component. A calibrated value of a parameter of the communication channel is determined in response to the received calibration pattern. The steps involved in calibration cycles can be reordered to account for utilization patterns of the communication channel. For bidirectional links, calibration cycles are executed which include the step of storing received calibration patterns on the second component, and retransmitting such calibration patterns back to the first component for use in adjusting parameters of the channel at first component.

In a pulse output circuit in a shift register, a power source line which is connected to a transistor in an output portion connected to a pulse output circuit at the next stage is set to a low-potential drive voltage, and a power source line which is connected to a transistor in an output portion connected to a scan signal line is set to a variable potential drive voltage. The variable potential drive voltage is the low-potential drive voltage in a normal mode, and can be either a high-potential drive voltage or the low-potential drive voltage in a bath mode. In the batch mode, display scan signals can be output to a plurality of scan signal lines at the same timing in a batch.

The invention provides a semiconductor device and a shift register, in which low noise is caused in a non-selection period and a transistor is not always on. First to fourth transistors are provided. One of a source and a drain of the first transistor is connected to a first wire, the other of the source and the drain thereof is connected to a gate electrode of the second transistor, and a gate electrode thereof is connected to a fifth wire. One of a source and a drain of the second transistor is connected to a third wire and the other of the source and the drain thereof is connected to a sixth wire. One of a source and a drain of the third transistor is connected to a second wire, the other of the source and the drain thereof is connected to the gate electrode of the second transistor, and a gate electrode thereof is connected to a fourth wire. One of a source and a drain of the fourth transistor is connected to the second wire, the other of the source and the drain thereof is connected to the sixth wire, and a gate electrode thereof is connected to the fourth wire.

A right circular cylindrical body of an isotropic dielectric such as a cross-linked styrene copolymer, has respective pluralities of mutually parallel grooves formed in its axial end faces, spaced apart by an intermediate portion whose dimension c is a half wavelength. The axial lengths a, b of the grooves are such that when a wave passes through the body, a quarter wavelength phase difference is produced between a component of a wave having its E-vector parallel to the grooves and a component of the wave having its E-vector orthogonal to the grooves. Alternatively the plate may consist of two or more discrete bodies whose grooves are dimensioned to produce a total differential phase shift of one quarter wavelength.

A generator airgap monitoring system includes a first proximity sensor disposed in a first location of a stator and configured to transmit a first signal representative of a first distance between the first proximity sensor and a plurality of rotor poles of a rotor, and a controller communicatively coupled to the first proximity sensor. The controller is configured to derive a first plurality of instantaneous airgaps based on the first signal and to determine a difference between a first instantaneous airgap of the first plurality of instantaneous airgaps and a second instantaneous airgap of the first plurality of instantaneous airgaps. The first plurality of instantaneous airgaps includes a first plurality of measurements of airgaps between the stator and the plurality of rotor poles when the rotor is rotating. The first instantaneous airgap and the second instantaneous airgaps include measurements for respective rotor poles.

The present invention relates to a gum dispenser for automatically dispensing gum by the vertical lifting of a gum case. Particularly, the present invention provides a container that has a self-sealing means, accurately dispenses a piece of gum one by one, prevents the generation of container defects, and provides ease of operation and molding. Currently, in the above operation structure, an inner case receiving gum therein is fitted in a lifting shaft of an outer case to be lifted or lowered so that a piece of gum is pushed up to an upper end of the lifting shaft, and then the gum is exposed to a dispensing hole perforated in a lid, which is coupled with the inner case, one by one for a user to enjoy. The above structure, however, has a disadvantage in that if two pieces of gum are lifted to the upper end of the lifting shaft and the lifting shaft is exposed to the perforated hole of the lid, then the lifting shaft and the dispensing hole correspond to each other 1:1 so that the two pieces of gum pop out, which makes the gum difficult to catch. In addition, if the lifting shaft is molded integrally with the outer case, the lifting shaft is likely to be twisted or bent due to the thickness thereof in the cooling procedure during the molding thereof so that it is difficult to achieve a precisely standing structure. Furthermore, if the inner case is repetitively lifted or lowered in the outer case, an outer force may be applied in the lifting motion according to a vacuum state, so that smooth operation becomes impossible and longer molding time is required in the molding. In addition, in the state that the lid is sealingly coupled with the outer case and the inner case for the sealing of the container during storage or delivery thereof, a perforated lid for implementing the dispensing hole may be pressed by the lifting shaft and the container may burst. If the perforated lid is formed to be thick in order to prevent the bursting, a pulling portion to be pulled for cutting the perforated lid is likely to be cut, and implementation of the dispensing hole may fail. As a result, the present invention is aimed at resolving the above problems.

A lift device for selectively adjusting a vertical position of a power tool relative to a working surface of a plate of a work bench includes a carriage assembly securable to an underside of the plate. The carriage assembly includes a securement mechanism selectively adjustable for interchangeably securing a plurality of power tools of different cross-sectional dimensions to the carriage assembly. A drive assembly selectively moves the securement mechanism upward and downward relative to the plate to adjust the vertical position of the power tool relative to the working surface when the power tool is secured to the carriage assembly. A drive-locking mechanism selectively locks the drive assembly. The drive-locking mechanism includes a cam lock for selectively engaging the drive shaft to inhibit rotation of the drive shaft.

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.

Some embodiments relate to a phase shifter that includes an I/Q phase shifter and at least one LC balun. Compared to conventional phase shifters, phase shifter has primarily only LC components, thereby limiting losses relative to conventional solutions. In one embodiment, for example, a phase shifter shows a large bandwidth at 77 GHz center frequency (e.g., 1 dB amplitude error bandwidth is approximately 40 GHz; 1° phase error bandwidth is about 16.5 GHz). The inductors included in phase shifter, in contrast to the quarter wave transmission lines used in conventional phase shifters, reduces chip area compared with conventional solutions. In some embodiments, an emitter follower helps to provide a relatively constant output that is largely independent of temperature, input power, VCC, manufacturing variation, and so on.

An apparatus for coding a signal by means of amplitude shift keying comprises a class E amplifier including a switching transistor, to whose gate is supplied a voltage having an operating frequency for operating the class E amplifier. For achieving an amplitude shift keying in the output signal of the class E amplifier, a circuit for switching the operating frequency of the voltage supplied to the gate of the switching transistor, or the resonance frequency of the class E amplifier, between a first value and a second value is provided and in order to switch a deviation degree between the operating frequency and the resonance frequency between a first value and a second value.

A combination gift card holder and message delivery package facilitates the identification of a gift card contained within the package while presenting the recipient with an accompanying message prior to fully revealing the gift card. The package includes first, second and third panels. The first and second panels and the second and third panels are connected with one another along a common edge and are pivotable with respect to each other. The panels have cutouts therein. The gift card is positioned in the package between the second and third panels thereby exposing a portion of a front surface of the gift card through the cutout in the third panel and exposing a portion of a rear surface of the gift card through the cutout in the second panel, thereby partially concealing the gift card while exposing an identification marking thereon.

The disclosed invention introduces an efficient lifting mechanism for reciprocating vertically a load system, the load consisting of the aggregate weights of a cargo payload in conjunction with “dead weights” of moving parts of the lifting apparatus. The disclosed invention uses a hydro-pneumatic linear actuator to lift the load and a pressurized accumulator, acting as a force intensifier. The pressurized accumulator, acting as a self-contained stored energy source, provides to the actuator adequate power to lift the “dead weights” plus part of the cargo payload. An external power source provides to the actuator adequate power to lift the remainder of the cargo payload. The disclosed invention saves significant amounts of power and energy in applications in which the “dead weights” are sizable compared to the cargo load. The disclosed invention provides also exceptional means for accurate motion control of the cargo payload.

A transmission may include gears and a clutch to allow the transfer of torque, at a variety of gear ratios, between an input shaft and an output shaft. The clutch may include a cushion piston to decrease the velocity of a transmission piston before the transmission piston engages a clutch element. The cushion piston may be contained within the transmission piston and configured so the cushion piston ceases movement toward the clutch element before the transmission piston. The pistons may be coupled together such that the cushion piston may resist movement of transmission piston toward the clutch element.

A wellbore tubular lift safety system and tubular lifting apparatus for removing tubulars can include a lower section with a lower base plate hole, sliding rods, and a lower gripping member. An upper section can have an upper base plate hole, a saw mounting plate hole, an upper gripping member, and cylinder barrels. The sliding rods can be engaged within the cylinder barrels, and can be moved therein for extending and retracting the upper section. The apparatus can be positioned over the wellbore in a retracted position to align with the tubular. The tubular can be lifted out of the wellbore by gripping the tubular using the gripping members, and extending and retracting the upper section. The apparatus can form lifting holes in the tubular, install lifting members in the lifting holes, saw the tubular, and allow the cut tubular to be lifted via a hoist.

An apparatus of the present invention is used for movable objects upwardly and downwardly relative to a fixed surface. The apparatus includes a lifting device presented by a pair of blocks movable relative one and the other. A carriage device is supported by the blocks. The carriage device is connected to object to be lifted relative the fixed surface. An actuator is connected to the blocks. As the actuator moves the blocks relative one and the other, the blocks move above the carriage device relative the fixed surface at various distances lift and lower the objects.

The invention relates to a three-armed pivot system, the two upper pivot arms having a V shape and representing part of a parallelogram, and the lower arm being a single, centrally situated pivot arm which represents the second part of the parallelogram. The active cylinder is assisted by a gas spring, and a personal protection safety net covers the gap between the vehicle and the platform, which may optionally be horizontally displaced. The active cylinder has a lift sensor which is connected to the controller, and the offset positioning of the active cylinder with respect to the bracket and of the fastening point to the pivot arm or support produces an improved lifting force.

A system for vertically lifting and lowering a container relative to a supporting surface. The system includes at least two lift mechanisms wherein each mechanism includes a frame attached to the container. An elongated cylinder and piston is associated with each frame so that its axis is substantially vertical. A control circuit selectively connects a power source to each cylinder and piston to move the cylinder and piston between a retracted position in which the piston is spaced upwardly from the supporting surface and an extended position in which a foot on the piston engages the supporting surface and lifts the container upwardly from the supporting surface.

A device, system, and associated methods for appliance lifts are disclosed. The appliance lift sits on the bottom of a cabinet, rolls forward and rotates forward and up using four rotating bars and a gear with spring and damper linking them together. This system consists of a platform dimensioned of a size and shape to support most kitchen counter-top appliances or any other like sized items. The platform is supported by a series of linkages housed in a frame. The frame is then on a moveable track. The entire structure is sized to fit inside the lower section of a standard kitchen cabinet.

An apparatus for raising and lowering a carrier for supporting clothes hangers or other hanging articles within a wardrobe closet that includes a tube, brackets for rotatable mounting of the tube, a tubular motor coupled to the tube for rotating the tube, and a base that attaches to a side panel of the wardrobe closet. Two arms each lie on a plane parallel to the base and to the side panel, attach at their ends to the carrier, and are mounted on the base so that they may oscillate and pivot in the plane between two positions, raising and lowering the carrier. At the lowest position the carrier releases from the arms and drop further. Fabric straps are wound onto and unwound from the tube to raise and lower the arms as the tube is rotated. A remote control receiver or programmable device may be used to control operation of the motor.

This invention discloses mechanical and hydraulic jacks for lifting heavy fireproof and burglary proof file cabinets with their contents inside for transportation to a truck or other destination. This jack can also lift lateral or regular file cabinets with their contents inside for transportation. It discloses a hook assembly which can be extended over the top of the cabinet remote from the jack with a hook to hold the cabinet from tilting. It discloses a lifting assembly with a lifting plate at the front bottom of the jack for inserting under the bottom corners of the cabinet for lifting. A device for tilting the cabinet away from the jack is disclosed to allow the lifting plate to be inserted under the cabinet. A lifting plate on the front bottom of the jack can be extended under the end of a file cabinet which is secured by the hooking assembly.

Systems and methods for rig assembly and for erecting a mast of a rig and such systems with roller apparatus to facilitate movement of a mast section from a mover. In a first embodiment, the method includes erecting a rig mast section on a substructure, the substructure including a first substructure box spaced-apart from a second substructure box, the first substructure box comprising a first upper box above a first lower box and the second substructure box comprising a second upper box above a second lower box.

A lifting apparatus for a lift system is disclosed. The apparatus includes a) a motor adapted for providing a lifting force, b) at least one connector operatively connected to the motor, the connector adapted for connecting a load-bearing component to the motor, c) an information receiver for receiving a load limit information about the load-bearing component, d) a motor controller electrically coupled to the motor and the information receiver, wherein the motor controller is adapted to limit the lifting force of the motor based on the load limit information received by the information receiver.

The present invention provides devices, apparatuses, and systems for lifting and mounting of clinical- and research-related equipment. In particular, the present invention provides a lift and mount system for mass spectrometers (e.g., for time of flight (TOF) mass spectrometers (MS)).

Rail-mounted lift systems are disclosed. In one embodiment, the lift system includes a rail having at least one conductor positioned on an upper interior surface of the rail. A carriage may be slidably disposed in the rail for relative movement to the rail. The carriage generally includes a carriage body, at least one pair of support wheels rotatably coupled to the carriage body and slidably engaged with the rail, and a conductor truck comprising at least one conductive roller rotatably attached to the conductor truck. The conductor truck may be mounted to the carriage body with a biasing member upwardly biasing the conductive roller into rolling engagement with the at least one conductor. A lift unit may be coupled to the carriage body and includes a motor paying out and taking up a lifting strap. The lift unit is electrically coupled to the at least one conductive roller.

A mobile lift crane includes a carbody; a rotating bed; a boom; a moveable counterweight unit; at least one linear actuation device; and at least one arm pivotally connected at a first end to the rotating bed and at a second end to the linear actuation device. The arm and linear actuation device are connected between the rotating bed and the counterweight unit such that extension and retraction of the linear actuation device changes the position of the counterweight unit compared to the rotating bed. In one method of operation, the counterweight unit is never supported by the ground during crane pick, move and set operations other than indirectly by the ground engaging members on the carbody.

A portable lifting system includes a moveable base component including a scissors lift assembly, and a crane assembly coupled the movable base component, the crane assembly including a support member and a boom coupled to the support member.

The Invention provided is a hydraulic powered down hole reciprocating pump traveling valve component to provided lifting hydraulics on the down stroke using the derived motion and pressure of petroleum liquids and gasses, such as oil, water and natural gas and also utilizing the frictional traveling forces driven by the surface equipment. Designed to utilize the elements within the pumping apparatus to obtain the hydraulic power within and transfer the energy's force to the exposed bottom end of the pressure locked traveling ball valve adjacent within the ball valve containment cage, providing ultimate lifting power to open the ball valve on the initiation of the down stroke. The component consist of a Hollow Hydraulic Power Shaft, Hollow Pressure Motion House, and a Fluid Cavity Power Drag Plunger.