Abstract: A relief device in air pump includes a main body defining an interior space and a discharge passage fluidly communicating with the interior space. The discharge passage is selectively closed and opened by a valve device. The valve device is movable in the discharge passage. The valve device includes a first sealing portion and a second sealing portion selectively engaging with the discharge passage. The valve device is movable between a first position in which one of the first and the second sealing portions engages with the discharge passage and a second position in which the other of the first and the second sealing portion engages with the discharge passage. The discharge passage has a length measuring from the first end to the second end thereof, which is smaller than a length which measures a separation distance between the first and the second sealing portions.

Abstract: A valve and seat set has a seal coupled to the valve body, the seal surface comprising irregularities to allow pressure to propagate in-between the mating surfaces when pressure from the inside of the valve is equal to, or greater than, pressure from the outside of the valve. This allows the seal to lift in response to minimal differential pressure in the intended flow direction (from inside the valve), while effectively sealing pressure in the reverse direction (from outside the valve).

Abstract: The present invention corresponds to a check valve with an inertial mass that is installed in the bottom of the production tubing and above the progressive cavity pump (PCP) of an oil well, which prevents that the hydrostatic column that is inside of the production tubing go down in the moment where the artificial lift of the column stops for the detention of the PCP pump. If we prevent that this phenomenon to happen, the PCP pump will not rotate in the opposite direction of its normal operation and it will not be clogged by any particulate material that is contained in it.

Abstract: A motor-driven chair has a central drive wheel located beneath the seat and linked so as to be aligned with the facing direction of the seat. A user turns the direction of motion by rotating the seat relative to a surrounding stabilizer assembly so as to turn the seat and the drive wheel towards a direction in which he wishes to move. A suspension arrangement maintains a desired distribution of user load between the drive wheel and the stabilizer assembly. A combination of fixed-axis wheels with castered wheels provides angular anchoring of the stabilizer assembly to facilitate the seat steering process. The entire structure is preferably foldable for easy transportation and storage.

Abstract: An adjustable mattress structure comprises a mattress body in which there are a plurality of hollow bases, a plurality of elastic support units, a plurality of adjustable positioning boards and a plurality of spring positioning bodies. Each of the elastic support units consists of a first encapsulated elastomer and a second encapsulated elastomer. The first encapsulated elastomer depends on spring positioning bodies to be fixed on one of the hollow bases so that the second encapsulated elastomer extends inside the hollow base. Each of the adjustable positioning boards is fixed inside a hollow base and used to receive a second encapsulated elastomer; the adjustable positioning boards in the hollow bases are situated at distinct positions by which the adjustable positioning boards make the elastic support units generate distinct resilient bearing capacities for adjustable mattress firmness supporting a body curve.

Abstract: A device for controlling braking in vehicles with two braking pedals (PS, PD), such as farm tractors, earthmovers and the like, comprises a body (30) in which there are formed: a pair of master cylinders (12S, 12D) with an associated brake booster (13S, 13D); a duct (18) for balancing braking of the rear wheels; seats (4, 5, 6) for a pair of balancing valves (14), a trailer brake valve (15) and a valve (16) for disabling braking of the front wheels; as well as passages (36, 46, 47, 62, 72) for transmitting a control pressure from the master cylinders to the valves and from the valves to outlets from the device (1) connected to the braking systems of the wheels of the vehicle and of a trailer, if any.

Abstract: A pressure relief valve includes a housing including an inlet chamber adapted to be in communication with an outlet of a pump and an outlet chamber adapted to be in communication with a pump inlet. The housing includes a bore having a first end in communication with the inlet chamber and a main spill aperture in communication with the bore and the outlet chamber. A piston includes an orifice and an axially spaced apart aperture. The piston is axially moveable within the bore between a first position whereat the piston seals the inlet chamber from the outlet chamber, a second position whereat the inlet and outlet chambers are in fluid communication with one another via only the orifice, and a third position whereat the inlet and outlet chambers are in fluid communication with one another via the orifice and the aperture. A spring biases the piston toward the first position.

Abstract: A valve assembly is disposed within a water supply line upstream of a water meter or other delivery location and is structured to eliminate or significantly reduce the passage of air there through to the upstream location. A valve body includes a sealing portion sealing disposed within the supply line and in interruptive, exposed relation to a path of fluid flow there through. One or more valve members are biased into sealing relation to a plurality of valve seat openings formed in the sealing portion. A sufficient, predetermined biasing force is exerted on the valve members to maintain them into a sealing orientation with the valve seats, thereby preventing the opening of the valve members until a sufficient water pressure is exerted thereon by a flow water, from which the air has been removed, along the path of fluid flow.

Abstract: A relief device includes a relief housing constituted by a relief inflow portion, a valve passage portion, a recess, and an oil discharge portion having a relief hole; a relief valve having a small-diameter portion between a first large-diameter portion and a second large-diameter portion; and a spring elastically biasing the relief valve toward the relief inflow portion. The recess is formed at a position that is closer to the relief inflow portion side than to the oil discharge portion, the axial length of the recess is larger than the axial length of the first large-diameter portion of the relief valve, and the shortest axial distance between the recess and the relief hole is less than the axial length of the small-diameter portion.

Abstract: An assembly can include a valve seat for an exhaust bypass valve of a serial turbocharger system where the valve seat includes a base portion and a wall portion that extends axially away from the base portion; and a gasket that includes a planar portion that defines a perimeter and a socket disposed interior to the perimeter, where the socket includes a valve seat surface axially recessed from the planar portion and configured to position the seat. In various examples, the valve seat is positioned in the socket of the gasket and fixed to the gasket. Various other examples of devices, assemblies, systems, methods, etc., are also disclosed.

Abstract: The present invention is an air evacuation apparatus that prevents the accumulation of air inside a swimming pool or spa filter by allowing any air to be removed from inside the filter every time the swimming pool pump is turned on. By allowing air to be removed from the filter, the present invention prevents the build-up of dangerous levels of potential energy caused by compressed air inside the filter that can lead to the violent separation of the filter. More important, the air evacuation apparatus of the present invention allows air to be safely and automatically removed from inside of the filter without interfering with the functionality of the filter.

Abstract: A valve apparatus and methods associated thereof are provided. The valve apparatus includes a valve housing structure. A first valve portion is connected to the valve housing structure, wherein the first valve portion has a sealing edge. A second valve portion is positioned at least partially within the valve housing structure. A constrictable membrane has a pressurizable interior compartment, wherein the constrictable membrane supported by the second valve portion and positioned proximate to the first valve portion, wherein at least a portion of the constrictable membrane is movable to engageable with the sealing edge of the first valve portion.

Abstract: A valve having an outer housing defining a central bore with a fluid inlet and a fluid outlet. A check dart assembly, valve seat and piston assembly are retained within the central bore. The valve is moveable between open and closed positions in response to fluid flow into the fluid inlet of the valve.

Abstract: A conduit protection system, comprising: a conduit for carrying a fluid; a sealed vessel surrounding the conduit along a protected zone of the conduit; and a valve moveable between a first position for obstructing fluid flow through the protected zone of the conduit and a second position for enabling fluid flow through the protected zone of the conduit, wherein the valve is biased to the first position, and wherein the valve is fluidically coupled to the sealed vessel such that a positive pressure within the sealed vessel is operable to move the valve to the second position against the bias. Also, a method for protecting a fluid carrying conduit.

Abstract: External airflow rates from floor vents that provide chilled air to information handling systems are measured with a disposable tool to ensure compatibility of the information handling systems' external air cooling constraints with the cooling capacity of the floor vents. For instance, an information handling system manufacturer sends a disposable tool formed from a cardboard box to a user location. The tool has an open bottom to fit over a floor vent and a slat cut in a side surface to move in response to airflow that enters at the bottom. Pre-calibrated markings associated with expected airflow rates for information handling system cooling floor vents measure airflow rates by the degree of slat movement so that the user location and manufacturer may confer to confirm the compatibility of the user location cooling capacity with selected information handling systems.

Abstract: A piston cartridge having a piston chamber, an inlet port, an outlet port, and a piston moveable between a first position and a second position. Also, the cartridge includes a first barrier positioned between the piston and the inlet port and a first sealing member moveable between the first barrier and the inlet port, wherein the first sealing member seals the inlet port when positioned adjacent to the inlet port but allows the fluid into the chamber when positioned adjacent to the first barrier. In addition, the cartridge also includes a second barrier positioned adjacent to the outlet port and a second sealing member moveable between the piston and the second barrier, wherein the second sealing member seals the outlet port when positioned adjacent thereto but allows the fluid to pass through the outlet port when positioned adjacent to the second barrier.

Abstract: A variable flow valve includes a housing, a valve element, an urging member, a first valve, a second valve, and a guide flow passage. The housing has an inlet opening, and an outlet opening. The first valve and second valve are formed between the valve element and the housing. The valve element has a separator wall. The separator wall separates the inlet opening and the outlet opening, and makes the second valve together with the housing. The guide flow passage is disposed on an inlet-opening side of the separator wall, and connects the inlet opening with the outlet opening when the separator wall moves to open the communication between the inlet opening and the outlet opening. The variable flow valve can make fluids flow without generating any turbulent flow, and can cope with the increment/decrement of required breather-gas flow volume more accurately.

Abstract: A connector comprising a needless access device and a backflow check valve for transferring fluids and method therefor. The connector may have a first port, a second port, and a third port. A first valve element may be positioned within the first port and a second valve element may be positioned within the second port. The first valve element may be in a first position as a first fluid flows between the first and third ports. The second port may be used to introduce a second fluid into the connector. Upon introduction of the second fluid to the connector, the first valve element may move from the first position to a second position. In the second position, fluid may be prevented from flowing past the first valve element.

Abstract: The invention relates to a control valve unit (9) for a variation device of a hydrostatic piston engine. The control valve unit (9) comprises a valve housing (34), in which a valve element is disposed in a longitudinally displaceable manner. The valve element is adjustable from a neutral position in the direction of a first end position and an oppositely directed second end position. With increasing adjustment of the valve element a first or a second output port (35a, 35b) is increasingly connected to an input port (12). The respective other output port (35b, 35a) is at the same time increasingly connected to a relief line (13). The valve element comprises a first valve piston (32a) and a second valve piston (32b), which act upon one another via an elastic element (27).

Abstract: A flow control valve includes a housing, a valve element, a valve-element urger, a first valve, and a second valve. The first valve closes the communication between inlet and outlet openings of the housing gradually when the valve-element urger moves the valve element away from the inlet opening. The second valve opens the communication between the inlet and outlet openings when the valve-element urger moves the valve element away from the inlet opening. The first valve is opened, and the second valve is closed when a differential pressure between a pressure of the fluid on an inlet-opening side and a pressure of the fluid on an outlet-opening side is a predetermined value or less. The second valve opens the communication between the inlet and outlet openings instantaneously when the differential pressure is more than a predetermined value.

Abstract: A powertrain includes a first pump and a second pump. A conduit defines a passageway for providing hydraulic pressure from the first pump or the second pump to a transmission. A valve assembly is configured to selectively supply hydraulic pressure to the passageway solely from the first pump, solely from the second pump, and from both the first and second pumps. The valve assembly thus enables the first and second pump to augment one another, thereby enabling the size of at least one of the pumps to be smaller than would otherwise be possible without the valve assembly.

Abstract: A pump including a main body having a piston provided in a portion of the main body, the piston being configured to reciprocate linearly. A piston spring may be provided within the main body and configured to bias the piston toward an end of the main body. Further, a plurality of intake check valves may be positioned radially within the main body and configured to move in a direction generally perpendicular to the linearly reciprocating direction of the piston such that brake fluid is introduced into the main body. Additionally, the pump may include an exhaust check valve configured to exhaust brake fluid from an inside of the main body to an exterior of the main body by moving an exhaust check ball in the linearly reciprocating direction of the piston.

Abstract: A filter bypass valve is disposed in parallel with an aircraft cabin air filtration system air filter. During normal operation, air is filtered through the air filter at an air flow that meets air flow requirements of the system. The bypass valve is designed to remain closed during normal use, and to open if the differential pressure across the air filter reaches a predetermined opening differential pressure to allow airflow to be partially or fully diverted around the air filter.

Abstract: A membrane valve wherein the shutter disk is retained in contact with the valve seat during ejection of liquid or gas by means of one or more ribs that are substantially in contact with the shutter disk along one or more lines secant to the shutter disk and/or by means of one or more rows of secondary clamping pins that are engaged in matching openings on the valve seat. Further, a second stage pressure reducer for two-stage underwater regulators incorporating a membrane valve wherein the shutter disk is retained in contact with the valve seat during exhalation of gas by means of one or more ribs that are substantially in contact with the shutter disk along one or more lines secant to the shutter disk and/or by means of one or more rows of secondary clamping pins that are engaged in matching openings on the valve seat.

Abstract: A combined spring brake modulating relay valve integrates the functions of a relay valve and a modulating valve. The housing includes a valve assembly movable in response to air pressure provided to selected ports in the housing. A relay piston selectively communicates with a control port and a primary brake circuit port. A modulating piston includes surfaces selectively pressurized by the primary brake circuit port and a secondary brake circuit port. This modulates the pressure from the delivery port to thereby selectively apply the associated spring brakes if a failure is detected at the primary brake circuit port. The exhaust member selectively controls communication between the supply and delivery ports as necessary.

Abstract: The phaser of the present invention includes a reed plate. The reed plate has reed valves, which control the flow of hydraulic fluid. The reed valves are all inclusive on the reed plate. Worn trails in the surface of the parts sandwiching the reed plate direct the flow to and from the reed valves.

Abstract: The invention concerns a device for controlling a fluid flow, characterised in that said device comprises second valve arrangement means interposed in the circuit in series with first valve arrangement means (20, 22, 34), and wherein a second mobile closure element (38) moves between a pressing position, wherein it is pressed on the seat (32) of a second threshold (30) and an opening position wherein the second closure element (38) is spaced apart from the second seat (32) to allow the fluid through the second threshold (30), and in pressing position, the second closure element (38) allows a reduced flow of the fluid through the second threshold (30).

Abstract: A hydraulic power steering system (10) for turning steerable wheels of a vehicle. The system (10) comprises a steering gear (12) including a hydraulic motor and a steering valve. The steering gear is susceptible to pressure fluctuations that cause noise during steering. The system (10) further comprises a pressure relief valve (14) having an unactuated condition and actuated conditions. The pressure relief valve (14), in the unactuated condition, restricts fluid flow through the pressure relief valve (14). In an actuated condition, the pressure relief valve (14) permits fluid flow through the pressure relief valve (14). The pressure relief valve (14) progressively is operable from the unactuated condition to an actuated condition as a pressure differential between the inlet (38) and the outlet (40) of the steering gear (12) increases.

Abstract: A circular check valve with a central aperture is disclosed. The preferred use as a standing head valve for reducing hydrostatic pressure in a wellbore being produced by a reciprocating pump is discussed. In this application the circular check valve allows the a sucker rod, or equivalent source of pumping energy, to pass. The device is attached to the pump barrel in communication with pump chambers and the production tubing. The check valve device isolates the pump internals and the formation from the hydrostatic head of the produced fluid. The device eliminates pump-off and thus fluid pounding resulting in more efficient pumping and less maintenance. Other uses for the circular check are described.

Abstract: A high pressure reciprocating pump (10) for high fluid pressures between 30,000 and 60,000 psi and having a valve cartridge (57) positioned within a manifold block (15) of the pump (10). The valve cartridge (57) has a fixed body (58) with a plurality of equally spaced suction opening (69) extending therethrough. A central bore (70) of the valve cartridge body (58) has a valve assembly (72) mounted therein. Valve assembly (72) include a discharge valve member (74) and a suction valve member (80) mounted for sliding movement about the outer surface of discharge valve member (74). A spring (84) biased between discharge valve member (74) and suction valve member (80) continuously urges the valve members (74, 80) toward closed position. On the suction stroke, suction valve member (80) is opened and fluid through suction openings (69) enters the pump chamber (37).