Abstract: A piezoelectric valve is provided that includes a valve body includes a plug and a drive body coupled to the valve body and operable to cause the rotatable plug to rotate about a rotational axis. The drive body includes a shaft disposed along the axis, the shaft statically coupled to the plug and rotatably coupled to the drive body. The drive body also includes a rotor assembly disposed about the axis and rotatably coupled to the drive body. The drive body further includes a first piezoelectric actuator disposed about the axis and statically coupled to the drive body, the first piezoelectric actuator configured to frictionally engage an inner surface of the rotor assembly. The drive body additionally includes a second piezoelectric actuator disposed about the axis and statically coupled to the shaft, the second piezoelectric actuator configured to frictionally engage the inner surface of the rotor assembly.

Abstract: The invention relates to a shut-off device comprising a housing which is to be connected to an adjacent conduit in a pressure-tight manner. A tubular passage is defined in the housing for a medium flowing through the conduit. Said device also comprises at least one sealing body which can be displaced by an articulated mechanism, by means of an adjusting drive that can be moved vertically in relation to the direction of flow, from an open position into a closed position in which the sealing contour of the at least one sealing body comes into contact with the tubular passage in a radially sealing manner. The articulated mechanism is guided parallel to the direction of displacement of the adjusting drive and comprises a bearing body to which the at least one sealing body is pivotably applied.

Abstract: A relief valve in a turbomachine is disclosed. The valve includes a gate designed to be mounted so as to pivot about a shaft for the opening and closing of an orifice for the passage of air, a seal, and an attachment device for attaching the seal to the peripheral edge of the gate. The gate and the attachment device are made of a plastic and formed of a single piece or secured to one another by welding or bonding.

Abstract: An apparatus for a gate valve between chambers includes a valve housing defining a flow path. A male valve portion is rotatable on a fixed axis in the housing. The male valve portion including a first male mating surface positioned at a first angle less than perpendicular to the axis. A female valve portion is fixed in the valve housing for receiving the male portion. The female valve portion including a first female mating surface positioned at a second angle matching the first angle. An o-ring seals the male valve portion to the female valve portion when the male valve portion is rotated into the female valve portion. A polished surface contacts the o-ring when the male valve portion is rotated. When the male valve portion is rotated into the female valve portion the o-ring is compressed thereby sealing the gate valve and closing the flow path.

Abstract: A high temperature gate valve including a valve body formed to define first and second ports and an exit, each of which has a length-wise dimension greater than a height-wise dimension, and a door, having a length-wise dimension greater than a height-wise dimension, coupled to the valve body to occupy and move between positions at which the door prevents fluid communication between one of the first or the second port and the exit and intermediate positions at which fluid communication between the first and the second port and the exit is permitted.

Abstract: A flow control device in which a flapper is continuously biased to the closed position by a leaf spring that may have a plurality of fingers. The same valve includes a shutoff mechanism allowing the user to adjust forward flow through the valve or shut it off entirely. The leaf spring is made to include polyoxymethylene.

Abstract: A gate valve of a semiconductor manufacturing apparatus, which is formed between a processing chamber in which processing is performed and a transfer chamber which carries a substrate on which the processing is performed, includes a gate valve at a side of the processing chamber; a sealing member which is formed in the gate valve at the side of the processing chamber; a gate valve at the side of the transfer chamber; a sealing member which is formed in the gate valve at the side of the transfer chamber; and a thermal insulator which is formed between the gate valve at the side of the processing chamber and the gate valve at the side of the transfer chamber.

Abstract: A liquid dispensing faucet including a flow control lever engaging a sealing member within an internal cavity of a faucet body. The sealing member is held within the faucet body in an oversized recess permitting liquid to flow about all sides of the sealing member when the flow control handle is placed in an open position and liquid flows through the faucet body. The faucet body may have a removable spout mounted at a second end of the body. An air inlet may be included within a flow path of the liquid downstream of the sealing member. This air inlet promotes the removal of residual liquid from the flow path when the flow lever is in a closed position and is positioned to discourage flow of the liquid through the air inlet when the flow lever is in an open position.

Abstract: A ventricular-assist-device valve includes two flaps hinged to a peripheral wall by means of a couple of flexible struts. As each flap opens and closes during each cycle of operation, the struts flex and open passages for flow around them, around the flaps, and between the struts and the flaps, so as to prevent the formation of dead zones that contribute to the accumulation and deterioration of blood cells that produce clotting. The struts are tensioned so as to exert a pressure against the flow of the blood stream when the flaps are open. This tension creates a pressure differential between the underside and the peripheral regions of the flaps that forces blood flow around the hinges and washes out stagnant cells. As a result, clotting is materially reduced.

Abstract: According to one embodiment, a flow channel opening and closing device includes a first rotating plate provided rotatably along a face which crosses two adjacent flow channels, having a first fluid passing hole which overlaps with each of the two flow channels midway during rotation, which fully opens the one flow channel and blocks the other flow channel at a region except the first fluid passing hole by making the first fluid passing hole overlap with the one flow channel, and a second rotating plate provided adjacent to the first rotating plate and rotatably along a face which crosses the two flow channels, having a second fluid passing hole which overlaps with each of the two flow channels midway during rotation, which rotates to a position where the second fluid passing hole overlaps at least partially with the one flow channel when the first rotating plate rotates to a position where the first fluid passing hole fully opens the one flow channel.

Abstract: A gate valve includes a valve member and a valve plate. The valve member includes an opening. The valve plate is capable of sealing the opening, and is further capable of moving a proper distance and rotating a proper angle relative to the opening so as to open or seal the opening.

Abstract: The present invention generally comprises a floating slit valve for interfacing with a chamber. A floating slit valve moves or “floats” relative to another object such as a chamber. The slit valve may be coupled between two chambers. When a chamber coupled with the slit valve is heated, the slit valve may also be heated by conduction. As the slit valve is heated, it may thermally expand. When a vacuum is drawn in a chamber, the slit valve may deform due to vacuum deflection. By disposing a low friction material spacer between the chamber and the slit valve, the slit valve may not rub against the chamber during thermal expansion/contraction and/or vacuum deflection and thus, may not generate undesirable particle contaminants. Additionally, slots drilled through the chamber for coupling the slit valve to the chamber may be sized to accommodate thermal expansion/contraction and vacuum deflection of the slit valve.

Abstract: A backflow prevention device includes a plurality of flaps and a frame case for rotatably supporting the flaps. The flaps are opened by airflow supplied from a cooling fan and closed by gravity when the airflow stops. The backflow prevention device also includes a connecting member for connecting between the flaps. The connecting member serves to open the flaps at the same angle or close them simultaneously in response to changes in the amount of airflow supplied by a cooling fan in a manner such that the flaps are cooperatively opened or closed.

Abstract: A system to reduce standby losses in a hot water heater is presented. The system utilizes a dual safety relay valve between the combination gas controller and the burner. The dual safety relay valve bypasses gas to a rotary damper actuator valve to position a damper flapper valve located over/inside the flue pipe. Once the flapper valve has opened to ensure combustion, the gas is allowed to flow back to the dual safety relay valve. Some of the bypass gas may be diverted to boost the pilot or to supply a booster. The dual safety relay valve is then opened to allow the gas supply to the burner. Once the burner is turned off, bypass gas bleeds out of the rotary damper actuator valve to close the damper flapper valve to reduce standby losses through the flue pipe, and to allow the dual safety relay valve to close tightly.

Abstract: A pendulum gate valve including an expandable gate which pivots when unexpanded to selectively block a vacuum or other pressure-differential passage. The valve includes a valve plate sealing one side of the passage and a ring abutting an opposed side of the passage when the gate member is expanded. A compression spring biases apart the valve plate and ring to close the valve by means of respective two-stage hangers attached thereto, extending along the spring, and having distal ends capturing the spring. Pneumatic pressure applied to a pneumatic cavity formed between the middles of the two-stage hangers and accommodating the spring forces apart the valve plate and ring to open the valve in the blocking position. Thereby if pressure fails, the valve fails to a sealed state. The axially movable valve plate is advantageously water cooled to allow use with a heated processing chamber.

Abstract: A pendulum gate valve including an expandable gate which pivots when unexpanded to selectively block a vacuum or other pressure-differential passage. The valve includes a valve plate sealing one side of the passage and a ring or barrier plate abutting an opposed side of the passage when the gate member is expanded. A compression spring biases apart the valve plate and ring to close the valve by means of respective two-stage hangers attached thereto, extending along the spring, and having distal ends capturing the spring. Pneumatic pressure applied to a pneumatic cavity formed between the middles of the two-stage hangers and accommodating the spring forces apart the valve plate and ring to open the valve in the blocking position. Thereby if pressure fails, the valve fails to a sealed state. The axially movable valve or barrier plate is advantageously water cooled to allow use with a heated processing chamber.

Abstract: A rotary gate valve includes a gate which rotates above a process flow axis within a pipeline. The gate valve includes a first and second opposing housing members each having coaxial pathways and defining a gate channel when the housing members are joined together. A gate is positioned within the gate channel when the valve is in a closed position to prevent media from flowing through the pathways and rotationally displaced from the channel when the valve is in an open position to allow media to flow through the pathways. A first annular primary sealing sleeve is disposed within the first housing member and a second annular primary sealing sleeve is disposed within the second housing member. Each of the first and second annular primary sealing sleeves is adapted to sealingly engage each other under compression when the valve is in the open position, and with the gate when the valve is in the closed position.

Abstract: A method of starting an engine with an engine starter that includes pressurizing a motor supply chamber with a fluid, selectively pressurizing an actuating chamber in response to the pressure in the motor supply chamber, moving a first valve along a first axis in response to pressure in the actuating chamber and moving a pinion toward engagement with the engine in response to movement of the first valve. The method further includes further pressurizing the actuating chamber, moving a second valve along a second axis in response to the further pressure in the actuating chamber, rotating the pinion in response to movement of the second valve, meshing pinion teeth with teeth on the engine, and starting the engine in response to rotation of the pinion.

Abstract: A housing having at least one valve seat for at least one flap, which is supported so it can rotate on a drive shaft. The drive shaft is guided on at least one side through the housing, a sleeve, through which the drive shaft is rotatably guided, being disposed fixed in place on the inside of the housing in this area. The sleeve has a first area, which faces the flap and encloses the drive shaft with a first slight play. Furthermore, the sleeve has a second area, which faces away from said flap and has a diameter expansion in comparison to the first area and which, on the front side thereof facing away from the flap encloses the drive shaft with a second slight play. Furthermore, the valve is a gas recirculation valve of a motor vehicle.

Abstract: The invention relates to a valve, in particular a pendulum or slide gate valve, for essentially gastight closing of a flow path (F). The valve includes a valve housing (1) having a first wall (2) which has a first opening (3) and a first valve seat (4), a valve plate (5) having a closing side (6) with a first sealing ring (7) and at least one drive (8). By action of the drive (8), the valve plate (5) is pivotable or displaceable from an opened position (A) essentially parallel to the first valve seat (4), and the perpendicular distance between the valve plate (5), and the first valve seat (4) can be reduced so that, in the closed position (C), the flow path (F) is closed essentially gastight by an axially sealing contact between the first sealing ring (7) and the first valve seat (4).

Abstract: A rain hat device for heavy construction equipment which is installed adjacent to an exhaust gas discharging port of a distal end portion of an exhaust pipe to prevent inflow of rainwater therein is disclosed. The rain hat device comprises a swing cover installed at a distal end portion of the exhaust pipe in a spaced and floated state so as to prevent rainwater from flowing in the distal end portion of the exhaust pipe, and in which the swing cover does not come into contact with the distal end portion of the exhaust pipe to prevent noise from being generated due to contact and collision when an engine stops or exhaust gas is not discharged.

Abstract: A fluid selection valve unit is provided which is applicable to an exhaust gas control valve, a waste gate valve, or the like provided between a high-pressure-stage supercharger and a low-pressure-stage supercharger of a two-stage supercharging exhaust turbocharger so as to control an amount of exhaust gas supplied to the high-pressure-stage supercharger and the low-pressure-stage supercharger, and which is capable of improving control performance of a valve in such a manner that a passage area gently varies with respect to an opening degree of a valve member so as to minutely control an exhaust gas amount by using the opening degree of the valve.

Abstract: A Pendulum Valve having Independently and Rapidly Controllable Theta- and Z-axis Motion. The valve actuator used in the present invention provides the benefit of wide open unrestricted flow of a pendulum valve coupled with the high-resolution and wide dynamic range flow throttling of a ball or butterfly valve. The actuator mechanism will include motor drives and associated control system so that the drives are closely coupled to give highly controlled motion. The drive assembly introduces a concentric shaft arrangement that, when coupled with the highly controllable motor drives, exploits a cam-follower arrangement to make the relative rotation between the two concentric shafts result in highly controlled theta and z-axis motion. Finally, the plate to seal spacing afforded is greater than previously possible with prior valve actuator mechanisms, thereby substantially reducing flow turbulence through the valve as the valve plate eclipses the valve ports.

Abstract: Disclosed is a valve comprising a body, which has a fluid inlet port and a fluid outlet port, a flow path formed therein communicated with the fluid inlet port and the fluid outlet port, and a valve seat formed in the flow path; and a valve body, which is attached to or detached from the valve seat by pivotal or vertical motion, thereby closing or opening the flow path; wherein at least the body is made of a polyphenylene ether-based resin composition containing a polyphenylene ether-based resin and a polystyrene-based resin as essential components. Another feature is that the polyphenylene ether-based resin composition has a tensile strength of 20 MPa or more and a tensile elastic modulus of 1,000 MPa or more under an atmosphere at 95° C.

Abstract: A disclosed valve comprises a first valve body including first and second openings that permit gaseous communication between a chamber and an evacuation apparatus; a sealing valve element that moves near/away from the second opening to open/close the second opening; a sealing member provided in the sealing valve element to seal the second opening when the sealing valve element closes the second opening; a valve element retreat area that is provided in an inner wall of the first valve body away from the second opening, and shields the sealing member from an inside of the first valve body when the sealing valve element is moved to the valve element retreat area; and a first pivot shaft that pivots the sealing valve element so that the sealing valve element may be located in one of the second opening and the valve element retreat area.

Abstract: The invention relates to a valve, in particular a pendulum or slide gate valve, for essentially gastight closing of a flow path (F). The valve includes a valve housing (1; 1a) having a first wall (2) which has a first opening (3) and a first valve seat (4), a valve disk (5) having a closing side (6) with a sealing ring (7) and at least one drive (8). Through drive (8), the valve disk (5) is pivotable or displaceable from an opened position (A) essentially parallel to the first valve seat (4), and the perpendicular distance between the valve disk (5), and the first valve seat (4) can be reduced so that, in the closed position (C), the flow path (F) is closed essentially gastight by an axially sealing contact between the sealing ring (7) and the first valve seat (4).

Abstract: An apparatus for a gate valve between chambers includes a valve housing defining a flow path. A male valve portion is rotatable on a fixed axis in the housing. The male valve portion including a first male mating surface positioned at a first angle less than perpendicular to the axis. A female valve portion is fixed in the valve housing for receiving the male portion. The female valve portion including a first female mating surface positioned at a second angle matching the first angle. An o-ring seals the male valve portion to the female valve portion when the male valve portion is rotated into the female valve portion. A polished surface contacts the o-ring when the male valve portion is rotated. When the male valve portion is rotated into the female valve portion the o-ring is compressed thereby sealing the gate valve and closing the flow path.

Abstract: A gate valve of a semiconductor manufacturing apparatus, which is formed between a processing chamber in which processing is performed and a transfer chamber which carries a substrate on which the processing is performed, includes a gate valve at a side of the processing chamber; a sealing member which is formed in the gate valve at the side of the processing chamber; a gate valve at the side of the transfer chamber; a sealing member which is formed in the gate valve at the side of the transfer chamber; and a thermal insulator which is formed between the gate valve at the side of the processing chamber and the gate valve at the side of the transfer chamber.

Abstract: A gas turbine engine air valve assembly has first and second valving elements. The second element is rotatable about a first axis relative to the first element. The rotation controls a flow of air through the first and second elements. An actuator is coupled by a linkage to the second element. A plurality of follower member assemblies each have an insertion portion extending through a corresponding first aperture in the first valving element and a corresponding second aperture in the second element. The insertion portion is circumferentially fixed relative to one of the first and second valving elements and circumferentially moveable relative to the other of the first and second valving elements.

Abstract: A valve comprises a housing, an annular housing seat, and a gate. The housing comprises a fluid inlet and a fluid outlet. The housing seat is fixed in position relative to the housing via epoxy. The gate comprises a gate seat and a fluid passageway that extends through the gate. The gate is movable relative to the housing between an open position and a closed position. The gate is also configured to allow fluid to flow from the fluid inlet through the fluid passageway to the fluid outlet when the gate is in the open position, and configured such that the gate seat engages the housing seat in a manner preventing fluid from flowing from the fluid inlet to the fluid outlet when the gate is in the closed position.

Abstract: The interior of the stop valve is partitioned into an upper chamber where the valve mechanism is installed and a lower chamber where a filter is provided. The two chambers are conducted via a through hole of the partition and are connected to two lateral tubular sockets of the stop valve, respectively. The stop valve can further contain a locking mechanism to securely connect a pipe to the stop valve. The locking mechanism mainly contains a tubular element that can be screwed into a tubular socket and a rubber ring washer at the interface between the pipe and a chamber of the stop valve.

Abstract: The shut-off system according to the invention for large conduit cross-sections has a swing flap which can be swung to and fro between two end positions about a pivot axis by means of a drive device, wherein the drive device has a drive shaft which is connected to the swing flap via an elbow lever, and at least one lever arm rigidly connected to the drive shaft is provided which is in operative connection with at least one operating cylinder for rotation of the drive shaft. The drive device has a motion link which is fastened so as to be rotatable about a pivot bearing, wherein the operating cylinder is connected to the motion link to pivot the same, and a transmission element is provided between the lever arm and the motion link in order to transmit the pivoting motion of the motion link to the drive shaft.

Abstract: A flow diverter valve is used in controlling the pressure and/or flow rate of a breathable gas supplied to the airways of a patient by a breathable gas flow generator supply apparatus during, for example, ventilatory assistance treatments such as non-invasive positive pressure ventilation and nasal Continuous Positive Airway Pressure (CPAP) treatment of Obstructive Sleep Apnea. The flow diverter valve includes a vane and a housing. The housing has an inlet port, an outlet port, and an exhaust port. The exhaust port opens to atmosphere, and the inlet port is in fluid communication with the flow generator. The outlet port is in fluid communication with a patient mask via a conduit. The vane is configured with respect to the housing such that a blower associated with the CPAP apparatus remains substantially unchoked, regardless of whether the vane is in the open or closed position.

Abstract: A vacuum valve comprises a valve housing which has an inlet opening and an outlet opening, a valve disk which is located in the interior space of the valve housing and which is arranged at a carrying arm that is rigidly connected to a shaft which, for purposes of opening and closing the vacuum valve, is rotatable around its longitudinal axis and displaceable in axial direction, and a driving device for opening and closing the vacuum valve. The driving device comprises a rotary drive for rotating the shaft. The driving device further comprises a driving piston which is arranged in an inner cavity of the valve disk and which has, at least over portions of its circumference, a radial extension which is larger than the outlet opening with respect to the center longitudinal axis of the outlet opening and at which tappets are arranged on the side facing the outlet opening.

Abstract: The invention relates to a valve, in particular a shuffle or sliding valve, for essentially gastight closing of a flow path (F). The valve includes a valve housing (1;1a) having a first wall (2) which has a first opening (3) and a first valve seat (4), a valve disk (5) having a closing side (6) with a sealing ring (7) and at least one drive (8). Through the drive (8), the valve disk (5) is pivotable or displaceable from an opened position (A) essentially parallel to the first valve seat (4), and the perpendicular distance between the valve disk (5), and the first valve seat (4) can be reduced so that, in the closed position (C), the flow path (F) is closed essentially gastight by an axially sealing contact between the sealing ring (7) and the first valve seat (4).

Abstract: Methods and apparatus for sealing an aperture that provides fluid communication between a second and first chamber of a dual chamber orifice fitting. A sealing assembly comprises a closure member that is rotatably moveable between an open and closed position relative to the aperture. A secondary seal is disposed within a recessed portion on a sealing face of the closure member. The recessed portion has a perimeter defined by a shoulder A primary seal is disposed within a groove formed between the shoulder and the secondary seal.

Abstract: A valve assembly including a housing having a flow path extending to an outlet and a valve seat in the flow path and around the outlet, a slide plate located in the housing and movable transversely to a longitudinal axis of the flow path between a closed position, in which the slide plate is in contact with the valve seat and blocks flow through the flow path, and an opened position, in which the slide plate allows flow through the flow path, and wherein at least one of the slide plate and the valve seat includes at least one passageway for providing a predetermined amount of conductance between the slide plate and the valve seat when the slide plate is in the closed position.

Abstract: An exhaust-gas recirculation (EGR) valve (10) comprises a valve opening (14), a valve member (16) that can be moved between a position which closes the valve opening (14) and a position which releases the valve opening (14), and further comprises a flow-guidance member (24), wherein the valve member (16), in the position that releases the valve opening (14), is disposed at least in part behind said flow-guidance member (24), when viewed from the central flow axis.

Abstract: The device (1) comprises a support structure (2) in which at least a first opening (8, 9) is defined, a shutter (13) which is mounted for piloting in that structure (2) and which is adapted to take up a least a first and a second angular position, in which it closes and opens at least partially the first opening (8, 9) of the structure (2), respectively, and an actuator device (25) which is capable of bringing about a controlled angular movement of the shutter (13) relative to the support structure (2).

Abstract: A vacuum valve comprising a valve body with a valve opening, a valve plate which is movable between an open position in which it lies next to the valve opening and releases the valve opening and a closed position in which the valve opening is covered and a diaphragm plate which is movable between a passive position, in which it lies next to the valve opening and releases the valve opening, and an active position in which it partially covers the valve opening. The vacuum valve has a completely open state in which the valve plate is in its open position and the diaphragm plate is in its passive position, a completely closed state in which the valve plate is in its closed position and is sealed relative to the valve body, and a partially closed state in which the valve plate is in its open position and the diaphragm plate is in its active position, wherein the vacuum valve has a reduced cross section compared to the completely open state.

Abstract: A gate valve assembly provides vacuum isolation between a first treatment system and a second treatment system. The gate valve assembly includes an actuator rotatably coupled to at least one of the first treatment system and the second treatment system, and configured to operate an actuator assembly that has an actuator arm slidably coupled to the actuator. The actuator arm has a distal end coupled to an isolation gate through a vacuum feed-through, wherein the vacuum feed-through is configured to preserve vacuum with the first treatment system and the second treatment system. The isolation gate is configured to rotate about the gate hinge when the actuator arm is translated, and to close a transfer slot between the first treatment system and the second treatment system, or open the transfer slot between the first treatment system and the second treatment system.

Abstract: A regulating vacuum valve comprises a valve housing with a through-channel, first and second valve plates which lie in adjacent and parallel planes and are mounted so as to be adjustable in their planes and can be moved into the through-channel from different sides proceeding from an open position in which they lie laterally adjacent to the through-channel to form a through-opening through the valve, the size of the through-opening being adjustable; a seal connection piece which is supported so as to be displaceable in the through-channel and is sealed relative to the valve housing, wherein, in order to provide a sealed state of the valve, the first valve plate is movable into a position in which it completely cover the through-channel and in which the seal connection piece is adjustable to the first valve plate and is accordingly sealed relative to the first valve plate by at least one sealing ring.

Abstract: An aircraft cabin pressure outflow control valve that includes a rotationally mounted valve gate and one or more flow influencing walls adjacent to or part of to the valve body. Each wall has a distal edge formed at a wall angle relative to one of the valve flow ports, and an inner surface that surrounds the valve gate when the valve is at or near it closed position. With this configuration, the effective flow area of the flow port varies substantially non-linearly over a range of valve positions.

Abstract: A microvalve for controlling fluid flow, including a body portion having at least one opening formed therein, a shutter located adjacent to and substantially parallel with the body portion, and a drive mechanism for causing the shutter to pivot with respect to the body portion so that the shutter is brought into and out of alignment with the opening of the body portion, wherein the microvalve is in a closed position and an open position, respectively.

Abstract: A gate valve apparatus minimizes the chance that radicals and plasma in exhaust gas will contact a main valve seal, thereby preventing deterioration of the main valve seal. Slats of a flow control device are installed in an exhaust flow path to control the pressure in a process chamber. The main valve seal is provided on an abutting surface of a main valve element. An annular projection is provided on a pump-side inner wall surface of an accommodating chamber. When it is in a non-sealing position, the main valve element is moved toward the pump-side inner wall surface of the accommodating chamber to bring an outer peripheral portion of the main valve element into contact with the annular projection. Thus, the main valve seal is shielded from radicals and plasma in exhaust gas by the main valve element, the annular projection and the pump-side inner wall surface of the accommodating chamber.

Abstract: Regulating slide valve comprising a valve body having a valve opening, and a valve plate which has two side surfaces and which is displaceable along a displacement path between an initial position in which it releases the valve opening and an end position in which it completely covers the valve opening, this displacement path forming the regulating area of the valve; wherein the valve plate has a contact ring on one side surface, which contact ring projects over the side surface of the valve plate and is mounted at or in the valve plate by a spring device, can be pressed in against the spring force of the spring device in the direction of the valve plate and contacts a contact surface of the valve body at least over a portion of its circumference in the end position of the valve plate.

Abstract: A motorized damper door assembly for use in freezing temperature applications includes a damper frame, a damper door having, a mounting portion rotatably mounted to the frame, and a seal member having a vertically extending moisture barrier adjacent the mounting portion. The door mounting portion and the moisture barrier together form a reservoir inside the door mounting portion to prevent moisture from seeping directly into the motor housing below the door mounting portion. Consequently, as moisture accumulation in the motor housing is avoided, associated damper jamming and impaired performance issues are also avoided.

Abstract: An aircraft cabin pressure outflow control valve that includes a rotationally mounted valve gate and one or more flow influencing walls adjacent to or part of to the valve body. Each wall has a distal edge formed at a wall angle relative to one of the valve flow ports, and an inner surface that surrounds the valve gate when the valve is at or near it closed position. With this configuration, the effective flow area of the flow port varies substantially non-linearly over a range of valve positions.

Abstract: The valve blades of the present invention facilitate delayed onset and gradual or fine variations in the flow of gas through the throttle valve to achieve a process interval of interior chamber gas pressures over a broader valve blade step range, achieve aggressive PI over a broad range for enhanced tool throughput, enhance stability of interior chamber gas pressures during substrate processing, and increase tool uptime and production efficiency. In one embodiment, each of the two valve blades in the throttle valve includes at least one, and typically, multiple notches or gaps for a delayed onset, and finely-graded increase, in flow of gas through the valve throughout the step range of the valve blades. In another embodiment, the semicircular valve blades have a cam-shaped configuration and are capable of varying the radius of the circle defined by the two blades.

Abstract: A valve assembly including a housing having an opening defined by a valve seat, a valve body movable within the housing between a completely opened position disengaged from the valve seat and a completely closed position engaging the valve seat, and a sleeve movable longitudinally along, and rotatably about, a longitudinal axis. The sleeve is connected to the valve body so that the valve body can rotate and move longitudinally with the sleeve. One of the housing and the sleeve includes a cam surface, and the other of the housing and the sleeve includes a cam follower received by the cam surface. A rotatable shaft is in threaded engagement with the sleeve so that rotation of the shaft causes at least one of rotation and longitudinal movement of the sleeve against the cam follower.