Abstract: A piston is configured by a piston body and a support such that the piston is divided, along a direction of axis line, into the piston body, which is formed integrally with a valve element, and the support, which is provided separately from the valve element. A piston ring, which slides along a body, is held between the piston body and the support. The piston body is constantly in contact with one side face of the piston ring, and the support is constantly in contact with the other side face of the piston ring.

Abstract: A valve, preferably of the flow control construction type, has a valve piston or pressure regulator piston mounted in an axially displaceable manner in a valve housing. The valve piston and the valve housing form a damping chamber for the motional damping of the valve piston.

Abstract: The device comprises:

Abstract: A metering valve assembly for use in sanitary applications and method of use is disclosed. The metering valve assembly has a relief valve hydraulically controlling a pilot valve covering a water supply inlet. The relief valve is controllably closed by a damping mechanism substantially independently of typical variations in water supply temperature and pressure.

Abstract: The present invention relates to a fluid actuating valve, wherein the valve body (1) comprises a longitudinal tubular body (11) and a transversal cylinder body (12), the longitudinal tubular body (11) defines a longitudinal fluid passage (113), and the transversal cylinder body (12) defines a valve chamber (121), a transversal well (114) is disposed in the middle of the longitudinal tubular body (11), and the upper surface (116) of the transversal well (114) is served as a valve seat. A valve core assembly (3) is provided in the transversal well (114), which engages with the inner wall of the well and the valve seat and is lifted by the pressure fluid coming from the valve inlet to open the valve. A pressure-releasing hole (1111) is provided at the outlet side of the longitudinal tubular body (11) to connect the valve chamber (121) with the longitudinal fluid passage (113) to the outlet side.

Abstract: A valve includes a device for shutting off a valve interior. The shutoff device is positioned by a piston which is guided in a cylinder and forms a first chamber and a second chamber in the cylinder. The second chamber communicates with the valve interior through a throttle path, so that the shutoff device is movable in a damped manner in both closing and opening directions.

Abstract: A control valve assembly for flushing a sanitary fixture includes a burst valve for supplying flush water flow at the beginning of a flush cycle and an independently controlled bypass valve for providing trap reseal flow after the burst valve closes. The burst valve includes a timing sleeve cooperating with a lifting piston to define a timing chamber communicating with inlet pressure through an orifice. A piston collar cooperates with the lifting piston to define the bypass valve. A lifting chamber defined between the body and the lifting piston communicates with the outlet through a metering valve assembly. Actuation of the metering valve assembly empties the lifting chamber and lifts the timing sleeve, opening the burst valve. The burst valve is closed when the timing chamber fills at a rate controlled by the orifice. The bypass valve is maintained open by pressure differential across the bypass valve to supply trap reseal flow until the metering valve assembly recloses.

Abstract: An accumulator fuel injection apparatus for an internal combustion engine is provided which includes a solenoid-operated fuel injector. The fuel injector includes a solenoid valve and a needle valve. The solenoid valve establishes and blocks fluid communication between a pressure control chamber supplied with fuel pressure from a fuel inlet and a drain passage formed in a valve body to change fuel pressure within the pressure control chamber, thereby bringing the needle valve into engagement with and disengagement from a spray hole. The fuel injector also has a first orifice disc and a second orifice disc installed within the valve body. The first orifice disc has formed therein a first orifice which provides a first flow resistance to fuel flowing from the fuel inlet into the pressure control chamber.

Abstract: A two-port cartridge type seat valve has a valve sleeve with a stepped guide bore for a poppet. The poppet includes a piston flange that divides the second step of the guide bore axially into an end-face first pilot chamber and an annular second pilot chamber. A first connection channel through the valve sleeve connects the annular second pilot chamber with an annular chamber into which a lateral main flow port opens. The free cross-section of a valve seat and of an axial main flow bore correspond approximately to the cross-section of the first step of the guide bore.

Abstract: A rapid-response solenoid-operated fuel injector for diesel engines is provided which includes a solenoid-operated valve member and a needle valve. The solenoid-operated valve member selectively establishes fluid communication between a fuel inlet and a fuel outlet. The needle valve is moved to selectively open and close a spray hole through which the fuel is sprayed. The solenoid-operated valve member is exposed at its head to the fuel pressure within a pressure control chamber supplied from the fuel inlet and has formed therein a pressure balancing chamber communicating with the pressure control chamber through a first orifice. The pressure of fuel within the pressure balancing chamber acting on the solenoid-operated valve member to block the fluid communication between the fuel inlet and outlet is balanced with the pressure of fuel within the pressure control chamber acting on the solenoid-operated valve member to establish the fluid communication between the fuel inlet and outlet.

Abstract: A toilet flushing device includes a body which has an inlet and an outlet. There is a valve seat in the body in the flow path between the inlet and the outlet and there is a valve member movable within the body toward and away from the valve seat to control water flow through the flushing device. A handle assembly is mounted on the body for causing movement of the valve member. The handle assembly includes a socket attached to the body and a handle mounted in the socket for pivotal movement relative thereto. A plunger is positioned in part within the socket and is in contact with the handle. Pivotal movement of the handle causes axial movement of the plunger, with a portion of the plunger being positioned for contact with the valve member. There is a spring biasing the plunger toward the handle and there is a bushing attached to the socket and having a central bore within which the plunger moves. A seal slide is mounted on the plunger and is in sliding engagement with the bushing as it moves relative thereto.

Abstract: A snubber which may be used with a diaphragm actuator or other movable member to prevent sudden movement of the movable member is provided. A typical diaphragm actuator has a diaphragm housing with a movable diaphragm therein dividing the diaphragm housing into two separate chambers. An actuator stem is connected to the diaphragm to move with the diaphragm. The snubber has a housing with an open interior space communicating through a communication path with a first one of the actuator chambers. A first piston is reciprocably movable within the snubber housing, the first piston being operably connected to the actuator stem to move therewith. The first piston divides the snubber housing space into two chambers, one on each side of the first piston. A passage is provided which leads from one of the snubber chambers to the other. A floating piston positioned in the communication path between the first piston and the first actuator chamber.

Abstract: A buffered valve having a longitudinal passage leading to a valve chamber. The valve chamber is divided by a spacer into a front and rear chamber which are connected by a port in the spacer. A normally closed main valve member is in the front chamber which blocks the longitudinal passage. A sub-valve which has a vessel or cup-like configuration is in the rear valve chamber and is biased toward the port in the spacer by a coil spring. The sub-valve has a through hole which is blocked by a check valve. Adjustable passages are provided for connecting between the front and rear chambers of the valve. When the main valve opens, the flow of fluid from behind the main valve member to the rear chamber is restricted by the port in the spacer and the sub-valve assembly to provide a buffered valve action. When the main valve is closing, the flow of fluid is again restricted by the passage in the sub-valve and the port in the spacer to provide a buffered action.

Abstract: A self-modulating control valve for high pressure fluids, particularly gas in three interacting pressure chambers are provided in association with the main disc which includes two piston portions of different diameters, one of which operates as a spool valve to meter fluid flow through valving ports to a pressure stabilizing chamber formed in the main disc and also to the outlet side of the valve. Fluid flow to the pressure chamber which includes the large piston portion is through a metering orifice which drops the pressure in combination with unseating the valve, allowing the pressure in the chamber which includes the smaller of the piston portions to contribute the unseating forces for the main disc.

Abstract: An electromagnetic proportional control valve apparatus comprises a valve body, a spool accommodated in a guide bore in the valve body, a valve seat element arranged at one end of the guide bore and facing toward the spool, a pilot valve controlling a valve bore in the valve seat element, and an electromagnetic drive unit for controlling the pilot valve. The spool has an axially extending axial bore formed in an end face opposed to the valve seat element, and a first restricting bore through which the axial bore communicates with the supply port. A projecting portion is formed on an end face of the valve seat element opposed to the spool, and is inserted in the axial bore in the spool. The projecting portion has a forward part formed therein with second restricting bores through which one end of the valve bore communicates with the axial bore. A restricting passage is defined between an outer peripheral surface of the projecting portion and an inner peripheral surface of the axial bore in the spool.

Abstract: A flush control valve (10) for metering a predetermined amount of flush fluid, or other liquid, to a facility, such as a urinal, to be flushed. The flush control valve (10) has a push button cap (166) that is actuated to cause the primary valve assembly (33) to open and distribute the flush fluid from the inlet chamber (35) of the flush control valve (10) to the outlet chamber (36) of the flush control valve (10). Depressing the push button cap (166) activates a timing assembly (109), the interior working components of which do not come in contact with the flush fluid controlled by the flush control valve (10), thereby eliminating corrosion to that critical portion of the valve (10). The timing assembly (109) is pneumatically operated and is effective through a diaphragm (108) to actuate a pilot valve assembly (83) which controls the opening and closing of the primary valve assembly (33).

Abstract: A pilot operated control valve includes a spool type pilot valve member which is coupled to the main valve member by a pair of springs so that both pilot pressure forces and spring forces act on the main valve member. The main valve member and the housing in which it moves enclose a damping chamber. A damping orifice extends through the main valve member and connects the damping chamber with a pilot pressure chamber to reduce vibration of the main valve member.

Abstract: A vacuum security valve includes a buffer volume in a movable piston. The movable piston has two orifices communicating with the buffer volume, the first orifice communicating with a clearance volume above the piston. A flexible diaphragm is connected to the piston for separating the clearance volume from the remainder of the interior of the valve body. Another orifice, disposed to communicate with the remainder of the interior of the valve body rather than with the clearance volume, is provided in the piston wall, and also communicates with the buffer volume. A solenoid operated valve, which is normally in the opened position, communicates through the valve body with the clearance volume, and also communicates with a vent. The security valve is connected at one port to a vacuum system which is to be protected upon power failure of a vacuum pump. The other port of the security valve is connected to the lines leading to the vacuum pump.

Abstract: The pressure responsive, pilot actuated, modulating valve comprises a main valve assembly which defines with the housing a first chamber and controls flow of fluid from an inlet port to an outlet port. A pressure responsive piston is provided which defines with the housing a second chamber. A vent passageway is provided in the piston for communicating the second chamber with the outlet port. A pilot valve assembly is provided to control flow through the vent passageway. A means is provided for selectively actuating the pilot valve assembly. A discharge orifice is comprised in the main valve assembly for communicating the vent passageway with the outlet port. A vent valve assembly is disposed to control flow of fluid between the first chamber and the discharge orifice.

Abstract: In a poppet valve having a poppet slidingly movable in a casing formed with an inlet port and an outlet port through which a pressurized fluid such as oil is supplied and delivered, the cross-sectional area of a rear end of the poppet to which one part of the pressurized fluid is applied under the control of a pilot spool provided slidably in the poppet is made larger than the cross-sectional area of a forward end of the poppet to which the pressurized fluid supplied into the inlet port is applied directly.

Abstract: A valve of the type which is actuated under the pressure of the medium it controls and in which axially-aligned actuating and damping pistons are disposed within cylindrical relief and damping chambers and are connected to a valve element engageable with a valve seat disposed between inlet and outlet valve ports. The actuating piston acts under the pressure of the medium it controls to actuate the valve element in response to a reduction in pressure in the relief chamber. The invention itself resides in the provision of a restricted passageway which interconnects the relief and damping chambers whereby the pressure in the damping chamber will be reduced slowly in response to a reduction in pressure in the relief chamber whereby, if the valve should stick or otherwise become slow-acting, the pressure within the damping chamber will assist and insure that the valve is actuated even though it may not be in the best operating condition.

Abstract: A gas regulation device to delay for a predetermined time the closing of a gas actuated main valve of the type having a main valve conduit connected to the main valve for carrying the gas which actuates the main valve. The regulation device comprises a first conduit which can be disposed in the main valve conduit to form a portion thereof and a check valve which is disposed in the first conduit so that gas can pass through the first conduit only in one direction. A bypass conduit is connected to the first conduit across the check valve such that gas can pass from the first conduit on one side of the check valve through the bypass conduit to the first conduit on the other side of the check valve. A flow regulation device is disposed in the bypass conduit to limit the flow of gas through said bypass conduit such that the pressure drop or increase required to open or close the main valve is delayed for a predetermined time.

Abstract: A valve of the type which is actuated under the pressure of the medium it controls and in which axially-aligned actuating and damping pistons are disposed within cylindrical relief and damping chambers and are connected to a valve element engageable with a valve seat disposed between inlet and outlet valve ports. The actuating piston acts under the pressure of the medium it controls to actuate the valve element in response to a reduction in pressure in the relief chamber. The invention itself resides in the provision of a restricted passageway which interconnects the relief and damping chambers whereby the pressure in the damping chamber will be reduced slowly in response to a reduction in pressure in the relief chamber whereby, if the valve should stick or otherwise become slow-acting, the pressure within the damping chamber will assist and insure that the valve is actuated even though it may not be in the best operating condition.

Abstract: A valve is located below the frost line in the water supply line for a drinking fountain or the like. When the valve is opened, a piston is raised by the water pressure, compressing a spring. When the valve is closed, the spring retracts the piston, sucking the water in the line down below the frost line. Water is retained within the valve and not drained into the surrounding earth. Hence, danger of pollution is reduced.

Abstract: A liquid metering flush valve to be installed in connection with plumbing fixtures such as water closets, urinals, service sinks, and other equipment and to supply said fixtures with a predetermined amount of water; which may be potable water, contaminated water, sea water, corrosive and/or unfiltered water, and water and/or oil combinations; at controlled pressures, flow rates and volumes. The basic valve design is on the hydraulic principal of proportional flow through orifices, regardless of pressure fluctuation but employs the use of four chambers, two of which are sealed and contain not only an orifice therebetween but a filtered, non-corrosive captive liquid to assure the orifice of protection from corrosive action and dirt which may damage the orifice or clog it and prevent it from working properly.

Abstract: A scavenging air valve for cleaning at least one tubular filter body is disclosed. The air valve has a laminar valve body, one side of which forms, by means of its inner portion, the shutoff for the inlet of a scavenging air line. Its edge zones of said one side face toward a scavenging air chamber. The valve body is movable perpendicular to the side mentioned, inside of a maintaining chamber, under the effect of the scavenging air. The maintaining chamber is, on the one hand, in constant communication with the scavenging air chamber over at least one throttling point and, on the other hand, is connected to a blockable exhaust air line through means of a control valve.