A control system for controlling movement of a medical device delivery system, a stent delivery system and a method for controlling movement of a medical device delivery system are provided. The control system includes a rotatable gear operably connected to a first movable member and a second movable member movable by the rotatable gear. The first movable member is operably connected to the first shaft and the second movable member operably connected to the second shaft. The first movable member moves the first shaft and the second movable member moves the second shaft to change a position of the first shaft relative to the second shaft and to change a configuration of a medical device operably connected to the first shaft and the second shaft.

Endoprothesis delivery systems and methods for making an using the same. An example medical endoprosthesis delivery system may include an inner member. An outer member may at least partially surround the inner member. The inner member and the outer member may be configured so that an implantable medical endoprosthesis can be disposed therebetween. A coupling device may be coupled to a portion of the outer member so that, when there is substantially no slack in the coupling device, as the coupling device moves in a proximal direction the portion of the outer member moves in the proximal direction. An adjustable stop may be coupled to the coupling device so that, when there is slack in the coupling device, as the adjustable stop is moved in the proximal direction, the amount of slack in the coupling device can be reduced.

A device and method for delivering a vascular device to a target site is provided that maintains a proximal portion of the vascular device within a tubular sleeve by positioning a stop of an inner member at a distal opening of the tubular sleeve to block the opening. Once the stop has been moved distally via movement of the inner member to clear the opening, a band of increased thickness on the inner member can urge the proximal portion of the vascular device out of the tubular sleeve to deploy the vascular device. The vascular device may be recaptured within a delivery sheath prior to the full deployment of the proximal portion of the vascular device from the tubular sleeve by re-positioning the stop at the distal opening to hold the vascular device within the tubular sleeve as the delivery device is retracted with respect to the delivery sheath.

Ocular implant delivery assemblies are provided which include a cannula having a lumen extending therethrough, a proximal end, a proximal end opening, a distal end, a distal end opening, and a lumen extending through the cannula. A cap is provided having a closed distal end, being in contact with the outer wall of the cannula, and covering the distal end and the distal end opening of the cannula, the cap being structured to allow the distal end and the distal end opening of the cannula to pass through the cap as the cannula is passed into an eye. An ocular implant is located in the lumen. The implant may be sealed in the cannula without the addition of a liquid carrier or it may be contained in a liquid carrier medium in the cannula. The implant may be made up of a number of microparticles having different compositions or different forms. The assembly also includes a sleeve located on the proximal end of the cannula and suitable for coupling the assembly to a syringe containing a pushing gel.

A pusher assembly for a stent delivery device includes a distal end of an elongate member and a stent-engaging member having proximal and distal ends. The proximal end of the stent-engaging member is mechanically coupled to the distal end of the inner member by a connector, or the proximal end of the stent-engaging member is at least partially inside the distal end of the elongate inner member. The stent-engaging member includes a portion that radially outwardly extends towards the distal end of the stent-engaging member, or the stent-engaging member includes a portion that radially outwardly extends towards the distal end of the stent-engaging member. The stent-engaging member is configured to move a stent when distally advanced and configured to not move a stent when proximally retracted. A stent delivery device includes an elongate outer member, an elongate inner member coaxially positioned within the outer member, and the pusher assembly.

A method models a defect management routine. Both the modeling and a handling are executed within a manufacturing execution system. During an engineering phase: modeling the production process and creating a library of possible defect types which may occur; assigning the defect types to at least one defect group; creating a library of defect specifications; creating a library of defect type specification details; creating at least one runtime defect criteria that is used to link the defect type to a certain production volume; and creating a runtime defect measurement routine that monitors a corrective measure. During a runtime production phase evaluating the product produced; identifying the respective defect type out of the library of defect types; and using the identified defect type to determine a corrective measure, a runtime defect criteria identifying the resource causing the defect type, a production volume, and to run the respective runtime defect management routine.

The present invention relates to novel antibodies, particularly antibodies directed against deletion mutants of epidermal growth factor receptor and particularly to the type III deletion mutant, EGFRvIII. The invention also relates to human monoclonal antibodies directed against deletion mutants of epidermal growth factor receptor and particularly to EGFRvIII. Diagnostic and therapeutic formulations of such antibodies, and immunoconjugates thereof, are also provided.

A method includes receiving first information identifying profile information associated with a customer, habit information associated with the customer's television viewing habits, or Internet usage information associated with the customer. The method also includes receiving preference information from the customer, wherein the preference information identifies advertisements or types of advertisements that the customer would like to view or would not like to view. The method further includes identifying advertisements based on the received first information and the received preference information, inserting, by a service provider, the identified advertisements in a television programming data stream and providing the identified advertisements to the customer.

A digital television system is connected to a mobile computing and communication device through an ad hoc communication link. A program broadcasted by the television system includes a plurality frames delivered in a sequential manner. A user can freeze a frame by employing the mobile device. The frame can then be transmitted to the mobile device and be redisplayed on the mobile device. The redisplayed frame includes visible symbols pointing to displayed items associated with advertising messages. The frame can also be stored in a photograph folder for the user to view the frame and associated advertising messages in a later time.

An exemplary method includes a media service provider system 1) providing an end user of an integrated media service with access to a media program by way of a plurality of different media distribution models, 2) maintaining a catalog that includes comprehensive information about the media program, the comprehensive information being an aggregate of non-redundant information about the media program obtained from a plurality of independent source catalogs corresponding to the plurality of different media distribution models, and 3) providing, based on the comprehensive information included in the catalog, a media service user interface that supports discovery of the comprehensive information about the media program regardless of a user interface context from which a user request for information about the media program is received. Corresponding systems and methods are also described.

Disclosed are a method, a composition, a microarray, an antibody and a kit for diagnosis and prognosis of cancer, based on detection of deletion of the exon 3 region of G-CSF gene or levels of a mutated G-CSF protein having a deletion of an amino acid sequence corresponding to the exon 3 region, wherein the deletion of the exon 3 region of the G-CSF gene is used as a cancer biomarker.

The Virtual Aggregation Processor enables end user devices to share a common wireless forward path of a multicast communication architecture in which the forward path delivered content is dynamically changed or modified based on a real-time, near-real-time, or delay-time basis via aggregated reverse path feedback from at least one of a plurality of end user devices. The Virtual Aggregation Processor periodically or continuously aggregates the feedback input received via the reverse path (having wired and/or wireless connectivity), modifies the forward path multi-media content, and delivers this dynamically modified multi-media content to the then connected population of end user devices via a wireless forward path multicast in a repetitive closed loop fashion.

A system and method may provide sets or packets of playing cards for forming part or all of a hand of playing cards. Each set or packet may be formed before starting to form another set or packet. Sets or packets may be formed in respective playing card receiving compartments. The playing cards may be withdrawn from a plurality of playing card receiving compartments of an intermediary playing card receiver in random or pseudo-random fashion, which may, or may not, be based at least in part on the selected payout or house odds and/or house advantage.

A fluid dispensing toothbrush (100). In one aspect, the toothbrush comprises a body (105) having a reservoir (135) containing an oral care fluid (136) therein, the oral care fluid being delivered to an applicator (132) via capillary action. The toothbrush comprises an actuator (130) for moving either the applicator and/or the reservoir between different positions.

In a wireless base station, a specific information receiver receives specific information delivered from a higher-level device to a wireless terminal. A specific information deliverer delivers the specific information to the wireless terminal via multiple physical channels activated in a wireless base station. Where a common channel via which information is periodically broadcast to multiple wireless terminals and a shared channel of which available radio resources are allocated to wireless terminals to transmit voice data and the like to the terminals are activated in the wireless base station, for example, the specific information deliverer can deliver the specific information using the common channel if the wireless terminal is in a standby state, and can deliver the specific information using the shared channel if the wireless terminal is in a communicating state.

An instrument for delivering a suture transfascially may include a handle, a shaft extending from the handle, and at least one needle that is moveable to an extended position beyond the end of the shaft. A suture may be delivered transfascially with the instrument. The instrument may include a suture catch associated with each needle for retaining and releasing a suture segment. A shield may be provided to shield the sharp end of each needle when it is moved to the extended position. A method of delivering a transfascial suture may include inserting an instrument into an abdominal cavity and deploying, from within the abdominal cavity, each needle through a soft tissue repair patch and then through at least part of the abdominal wall. A suture or suture segment may be advanced across the fascia with the at least one needle.

A device for deploying a tissue fixation apparatus of the type including first and second tissue anchors coupled together by an adjustable suture assembly. The device comprises a handle mechanism and a needle cartridge assembly releasably coupled to the handle mechanism. The needle cartridge assembly includes a needle cannula with a side opening through which a tissue anchor can be loaded into an internal chamber of the needle cannula. A push rod is disposed in the needle cannula and is operable between an extended position in which the push rod prevents the tissue anchor from entering the chamber through the side opening, and a retracted configuration in which the tissue anchor can be pushed into the chamber under the action of a resilient band positioned over the side opening.

A device for delivering a percutaneous nephrostomy plug is provided. The device comprises a tubular member configured for insertion into a biological body. The device further comprises a handle coupled to a proximal end of the tubular member. The handle comprises a pusher element, an actuation element, and a transmission. The pusher element is disposed within the tubular member, and is configured to deliver a plug through a distal end of the tubular member. The transmission is coupled to the tubular member and the actuation element, and the transmission is configured to cause a retraction of the tubular member relative to the pusher element in response to a depression of the actuation element. A first depression of the actuation element toward the tubular member urges a partial exposure of the plug. A second depression of the actuation element urges a further exposure of the plug.

A method and apparatus for assisting the calculation of the position of a receiver device (1200), by observing a transmitted signal having a known structure. The method comprises: comparing (S220) the time of arrival, at a reference position (X1), of a first portion of the signal with the time of arrival at the receiver, at an unknown position (Y1), of a second portion of the signal; obtaining (S230) a local wave propagation model of the signal, the model comprising an estimate of the direction of propagation of the signal in the neighborhood of the reference position and unknown position; and using (S240) the direction of propagation and the result of the comparison to assist in the calculation of the unknown position relative to the reference position.

Embodiments of the present method and system permit an effective method for determining the optimum selection of pulse width modulation polarity and type including determining machine parameters, inputting the machine parameters into a predicted duty cycle module, determining the optimum polarity of the pulse width modulation for a predicted duty cycle based on a pulse width modulation generation algorithm, and determining the optimum type of the pulse width modulation for a predicted duty cycle based on the pulse width modulation generation algorithm.

An apparatus comprising a plurality of chambers for receiving an associated plurality of staples, each formed with a shape memory that allows the staple to adopt a straightened configuration, when placed in a stapler, and a deployed configuration for suturing when released from the stapler; and a sleeve moveable relative to the chambers between a first position, in which the staples are trapped by the sleeve within the chambers in the straightened configuration, and a second position, whereby the staples are freed to adopt the deployed configuration, wherein the sleeve is adapted to move between the first and second positions by rotating relative to the chambers.

Devices for attaching a sheet-like implant to a target tissue include a sheath and a staple push rod. The sheath has a distal end configured to be pressed against the target tissue. The staple push rod is disposed within at least a portion of the sheath and is slidable relative thereto. The staple push rod includes a pair of stakes. Each stake is dimensioned to abut a surface of a staple to apply pushing forces thereto. The stakes are biased to assume a bow-like shape such that an intermediate portion of a staple extends tautly between the first stake and the second stake when the stakes are extending beyond the distal end of the tubular member. Methods for attaching a sheet-like implant to a target tissue are also disclosed.

Devices capable of deterring or preventing bulk extraction of drugs from, for example, drug-delivery systems are exemplarily disclosed. In one embodiment, such a device may include a package releasably retaining a drug and an agent. The agent is configured to suppress a physiological effect of the drug when the agent contacts the drug or is coadministered with the drug. The cell package is configured such that an amount of the drug is selectively releasable with respect to the agent when the package is operably proximate to an encoded key. The package, however, may be configured to impose a relatively high likelihood that either the drug will not be accessed or the drug will be contaminated by the agent if access to the contents of the package is sought without the use of an encoded key.

A method of enabling administration of a drug includes determining, within a drug-transfer device including cells, a location of at least one cell and generating information identifying the determined location. A user may be provided with the drug-transfer device. The drug is retained within the at least one cell when the user is provided with the drug-transfer device. The method also includes encoding a key with the information and providing the user with the key before, after or when the user is provided with the drug-transfer device. Drug retained within the at least one cell is selectively releasable when the key is operably proximate to the drug-transfer device and is encoded with the information. The key can be encoded with the information before and/or after being provided to the user. In some embodiments, the key is encoded based on instructions transmitted over a network.

An AF unit of a lens holder driving device includes a lens holder, a focusing coil, a permanent magnet having a plurality of permanent magnet pieces having first surfaces opposed to the focusing coil, a magnet holder holding the permanent magnet, and first and second leaf springs supporting the lens holder in a direction of an optical axis shiftably. An image stabilizer portion includes a fixed portion disposed near the second leaf spring, a supporting member swingably supporting the AF unit with respect to the fixed portion, an image stabilizer coil having a plurality of image stabilizer coil portions disposed so as to oppose to second surfaces of the plurality of permanent magnet pieces that are perpendicular to the first surfaces, and a plurality of Hall elements. Each Hall element is disposed at a position where the image stabilizer coil portion is separated into a plurality of coil parts.

A model aircraft control and receiving device in a housing, comprising an electronic, gyroscopic multi-axis programmable flight attitude controller, having control inputs for a plurality of control channels and inputs for gyroscope signals, wherein the flight attitude controller provides at least one input for a receiver module disposed inside or outside of the housing of the flight attitude controller. The device may be used in a method for controlling and stabilizing a model helicopter, wherein the control comprises a self-learning function and/or the control comprises a coupling of the tail controller to the swashplate controller and/or the control comprises a stopping support function.

The present invention is directed to signal processing system and electrical circuits. More specifically, embodiments of the present invention provide a DLL system that provides phase correction by determining a system offset based on phase differences among the delay lines. The offset is used as a part of a feedback loop to provide phase corrections for the delay lines. There are other embodiments as well.

In various embodiments an apparatus is presented for securing a structure such as a door, window, hatch, or gate that moves between an open and a closed position relative to a fixed structure to provide or deny access to a compartment, a room, an outdoor area, or a facility. Various embodiments provide a delay in opening the closure of sufficient duration to frustrate a rapid activation that might be desired by a person who is attempting to pass through the closure for some illicit purpose. Typically, hydraulics are used to activate the apparatus and no electrical energy or electronic signals are employed. In one embodiment, a plurality of actuations of a hand lever operates a hydraulic pump that moves a locking bolt from a first position in which a locking bolt is engaged with a recess in the fixed structure (preventing opening of a gate) to a second position in which the locking bolt is disengaged from the recess to permit opening of the gate.

A human surrogate neck model includes a spinal neck region containing cervical vertebrae. A biosimulant intervertebral material is inserted between the cervical vertebrae. The spinal neck region is surrounded by a first silicone material mixed with a polymeric cross-linking inhibitor. One or more elastic tension bands are anchored to a top interface and a bottom interface of the neck model. A second silicone material mixed with a polymeric cross-linking inhibitor is applied to surround the spinal neck region and the first silicone material and to embed the tension bands. One or more of the elastic tension bands and/or a concentration ratio of the first silicone material or second silicone material to the polymeric cross-linking inhibitor can be adjusted for variable test conditions to closely simulate or mimic the static and dynamic characteristics of a human neck in various scenarios.

A tridimensional modeling apparatus, system and kit is for representing an exploration network. The apparatus, system and kit include a transparent hollow cube with six plane surfaces for representing an enclosed volume, a plurality of perforations on at least two of the six plane surfaces and indicia around each opening for marking polar coordinates and orientation. The apparatus, system and kit further include a plurality of transparent rods for representing exploration channels. The plurality of perforations on the cube are arranged for receiving rods for tridimensional modeling of the exploration network and each rod is inserted into an opening with an angle and a depth, thereby resulting in a visual representation of the exploration network within the represented volume.

The present invention relates to a system, method, and apparatus that include a novel way of automatically assigning materials to 3D CAD models. A predefined material template specifies that a particular part or material name is assigned to a particular material such that all instances of the particular part name are assigned or modified automatically by the material template. By having a consistent naming convention for the parts in the CAD file, this material assignment can be performed automatically when the CAD file is imported or viewed.

A cloud computing system for object location, object identification, object picking, object picking by line, object loading onto one or more transport devices, or object delivery that can include using a cloud based server comprising a cloud based processor in communication with a cloud based data storage. The cloud based server can be in communication with at least one mobile processor in communication with a mobile data storage and a display. The method can also include sending instructions to an operator from the cloud based computer to a mobile processor associated with an operator to instruct the operator to perform a logistics operation. The logistic operation can include one or more of object location, object identification, object picking, object picking by line, object loading onto one or more transport devices, and object delivery.

In one embodiment, a viewer executing on an electronic device having a touch sensitive display shows a three-dimensional (3D) model of a building created using computer aided design (CAD) software. A plurality of selectable interface nodes are provided at respective locations within the 3D model. Each interface node is linked to at least one corresponding two-dimensional (2D) construction drawing that shows a section view, a plan view, an elevation view or a detail view of the building related to the location of the interface node. In response to receiving input from a user indicating selection of a particular interface node, a menu is displayed with one or more selectable menu options. In response to receiving additional input from the user indicating selection of a particular menu option, a corresponding 2D construction drawing for the particular interface node is displayed in context of the 3D model of the building.

A system and method for digital management and control of power conversion from battery cells. The system utilizes a power management and conversion module that uses a CPU to maintain a high power conversion efficiency over a wide range of loads and to manage charge and discharge operation of the battery cells. The power management and conversion module includes the CPU, a current sense unit, a charge/discharge unit, a DC-to-DC conversion unit, a battery protection unit, a fuel gauge and an internal DC regulation unit. Through intelligent power conversion and charge/discharge operations, a given battery type is given the ability to emulate other battery types by conversion of the output voltage of the battery and adaptation of the charging scheme to suit the battery.

A novel 3-Input-3-Output (3×3) Fuel-Air Ratio Model-Free Adaptive (MFA) controller is introduced, which can effectively control key process variables including Bed Temperature, Excess O2, and Furnace Negative Pressure of combustion processes of advanced boilers. A novel 7-input-7-output (7×7) MFA control system is also described for controlling a combined 3-Input-3-Output (3×3) process of Boiler-Turbine-Generator (BTG) units and a 5×5 CFB combustion process of advanced boilers. Those boilers include Circulating Fluidized-Bed (CFB) Boilers and Once-Through Supercritical Circulating Fluidized-Bed (OTSC CFB) Boilers.

A water delivery system is provided, comprising at least one faucet device with a cold water faucet part and a hot water faucet part, a cold water line to the at least one faucet device, a tankless heater device for heating water, a hot water line having a first portion running from an outlet of the tankless heater device to the at least one faucet device and having a second portion running from the at least one faucet device to an inlet of the tankless heater device, and a circulatory pump arranged in the second portion of the hot water line, wherein the circulatory pump has a prefixed first performance level and a prefixed second performance level, wherein the first performance level causes a finite water flow in the hot water line which is below an operation threshold value of the tankless heater device.

An automated lumber handling system laser-scans the top profile of multiple stacks of lumber, each of which contain boards of a unique size. Based on the scanned profiles, the system determines the order in which individual boards from a chosen stack should be transferred to a numerically controlled saw. The saw cuts the boards to proper size, and in the proper sequence to facilitate orderly assembly of a roof truss or prefabricated wall. In some examples, the system lifts individual boards by driving two retractable screws, or some other piercing tool, down into the upward facing surface of the board. A track mounted cantilever, holding the screws and a laser unit, translates over the lumber stacks to retrieve and deliver individual boards and, while doing so, the laser repeatedly scans the stacked lumber profiles on-the-fly to continuously update the profiles. The open cantilever design facilitates replenishing the stacks of lumber.

An agricultural implement system that includes a control system configured to receive a first signal to initiate seeding operations, to transition a ground engaging tool toward a working position at a first time after receiving the first signal, and to activate a product delivery system at a second time, different from the first time, after receiving the first signal.

A stack-fold implement having a central bulk fill hopper assembly is provided. The bulk fill hopper assembly is mounted to the center frame section of the stack-told implement and does not affect the narrowness of the stack-fold implement when it's in a stacked, transport position, The hopper assembly includes a pair of bulk fill hoppers or tanks supported by cradle that is in turn supported by a pair of wheels. The cradle is removably coupled to the center frame section by a plurality of rigid frame members.

A seed metering assembly for a farm implement has a meter roller that can be accessed and removed in a relatively quick manner. The seed metering assembly includes a fluted meter roller that is segmented into a number of discrete fluted sections. Each fluted section has an associated flow control member that is selectively operable to impede the flow of granular material from a seed hopper to its corresponding section of the fluted meter roller.

Referring to the drawings, wherein like reference numerals designate identical or corresponding parts throughout the several views, FIG. 1 illustrates a side elevation view of a single row unit (10) of a conventional row crop planter such as the type disclosed in U.S. Pat. No. 7,438,006, the disclosure of which is hereby incorporated herein in its entirety by reference. As is well known in the art, the row units (10) are mounted in spaced relation along the length of a transverse toolbar (12) by a parallel linkage (14), comprised of upper and lower parallel arms (16, 18) pivotally mounted at their forward ends to the transverse toolbar (12) and at their rearward end to the row unit frame (20).

An agricultural implement is provided that includes a first tool bar and a second tool bar each supporting respective ground engaging tools and fluid dispersal components. The second tool bar is pivotally coupled to the first tool bar. The agricultural implement further includes fluid conduits coupled to respective tool bars for conveying fluid to the respective fluid dispersal components. Additionally, each of the conduits has a flexible end adjacent to the other tool bar. Furthermore, the agricultural implement includes a fluid joint coupled between the first and second flexible ends and configured to provide a sealed connection between the first and second flexible ends during relative pivotal movement of the first and second tool bars in operation but to allow for uncoupling of the first and second flexible ends for servicing of the implement.

Disclosed herein is a method of delineating a second wellbore from a first wellbore. The method includes, emitting acoustic waves from a tool in the first wellbore, receiving acoustic waves at the tool reflected from the second wellbore, and determining orientation and distance of at least a portion of the second wellbore relative to the tool.

A modulator generates a baseband digital signal from an information-bearing digital signal. The baseband signal has time-varying phase and amplitude defined by a sequence of complex data words, each having an in-phase (I) component and a quadrature (Q) component. A noise-shaping modulator generates a noise-shaped digital signal from the baseband digital signal such that quantization noise in the noise-shaping modulator is attenuated by a spectral null of its noise transfer function. The spectral null is selected by a noise-shaping parameter corresponding to a selected one of a plurality of output frequencies. A signal converter generates an analog signal conveying the information of the information-bearing digital signal on an analog carrier signal having the selected output frequency.

In a reciprocating piston compressor with delivery rate control, the electromagnetic actuating device (3) of the valve lifter (2) has a separate positioning drive (10) for adjusting the working stroke range of the magnetic actuator (5) used, whereby this can be chosen to be small and highly dynamic and only low power losses occur.

A piston ring has a body member for sitting in a ring groove of a piston. The body member has an inner periphery, upper wall, lower wall and an outer periphery. The outer periphery has a concavity therein for storing lubricant therein. The upper wall has an outer section proximate to the outer periphery is constructed to be resiliently flexible between a flexed and unflexed position such during a portion of a power stroke, the volume of the concavity to store the lubricant is decreased by the flexing of the upper wall to the flexed position for expelling lubricant therefrom to a wall of the cylinder. The wall resiliently returns to the unflexed position during other times to allow excess lubricant from the wall of the cylinder to pass into the concavity.

A model railroad car coupler assembly comprises a coupler with an upper shank having a coupler knuckle at a distal portion and a flat proximal portion, a lower shank having a coupler thumb at a distal portion and a flat proximal portion, and a coil spring terminating in first and second end portions, with a first turn of the coupler spring interlocked with the upper shank and a second turn interlocked with the lower shank. A mounting box has a circular mounting post that accepts circular openings in the shanks permitting them to rotate relative to each other between a closed coupled position and an open uncoupling position. The spring end portions engage the mounting box to bias the shanks into their coupled position. The knuckle carries a ferrous actuating pin that cooperates with a magnetic pad along a track to rotate the upper shank into its open position.

Embodiments related to a self-contained coupler for model railroad rolling stock are provided. In one example, a self-contained coupler comprises a coupler assembly including a knuckle and an uncoupling assembly configured to operate the coupler assembly. The example uncoupling assembly includes a signal input for receiving a signal and a motivator coupled to the coupler assembly via a movable link, the motivator operative to adjust the knuckle from a first position to a second position responsive to the signal. The example uncoupling assembly also includes a housing including the motivator and a rolling stock mounting location for mounting the uncoupling assembly to an item of the model railroad rolling stock.

A device (200) includes a circuit (202) and a driver stage (204) therefor. The circuit includes two sub-circuits (231 and 232). The driver stage includes switcher logic (206) that produces signals that control switching on and off of the sub-circuits. The switcher logic also produces other signals in advance of the signals that control the switching of the sub-circuits. The driver stage includes delay compensations circuits (221 and 222), coupled to the switcher logic and to the circuit, that produce timing signals for the switcher logic. The timing signals are closely aligned with moments that a changing voltage at a node between the sub-circuits passes through threshold voltages. The timing signals compensate for all delays of signals through the device such that a period that both sub-circuits are off is minimized, while ensuring that both sub-circuits are not on at a same time.

Embodiments of chemical delivery systems disclosed herein may include an enclosure; a first compartment disposed within the enclosure and having a plurality of first conduits to carry a first set of chemical species, the first compartment further having a first draw opening and a first exhaust opening to facilitate flow of a purge gas through the first compartment; and a second compartment disposed within the enclosure and having a plurality of second conduits to carry a second set of chemical species, the second compartment further having a second draw opening and a second exhaust opening to facilitate flow of the purge gas through the second compartment, wherein the first set of chemical species is different than the second set of chemical species, and wherein a draw velocity of the purge gas through the second compartment is higher than the draw velocity of the purge gas through the first compartment.