Abstract: A valve assembly for regulating the pressure of a pressure medium (2) of a pressure medium pump (3) to at least one first consumer (4) includes a pilot-controlled pressure control valve (5) with a main piston (6) acted on by the pressure medium (2) and a pilot piston (7). A pressure chamber (8) between a piston back side (9) of the main piston (6) and the pilot piston (7) can be relieved. A relief valve (10) is connected in a fluid-conducting manner to the pressure chamber (8), opens when pressure at the load sensor (LS) represents an out-of-operation mode of the consumer (4), and recirculates pressure medium (2) having a low pressure to a pressure medium reservoir (11) or to the pressure medium pump (3). The relief valve (10) closes when the pressure at the load sensor (LS) represents an in-operation mode of the consumer (4).

Abstract: A valve assembly for an injection valve has a valve body with a central longitudinal axis and a cavity with a fluid inlet portion and a fluid outlet portion, a valve needle axially movable in the cavity, the needle preventing a fluid flow in a closing position and releasing the fluid flow via a main fluid line in further positions, a member being fixedly associated to the needle and having a surface facing the outlet portion, a first chamber embodied in the cavity, a second chamber being part of the main line, and a one-way-valve which is hydraulically arranged between the first and second chamber to prevent a fluid flow through a first fluid path in a closing position of the one-way-valve and to release a fluid flow through the first fluid path between the first and second chamber in further positions of the one-way-valve.

Abstract: A fluid flow control device includes a body having an inlet connection, an outlet connection, and a discharge port. A supply path extends between the inlet connection and the outlet connection and a booster module is disposed within the body. The booster module includes a control element and an actuator element and defines an exhaust path extending between the outlet connection and the discharge port. A supply port is disposed within the booster module along the supply path between the inlet connection and the outlet connection and at least a first damping means operatively connected to the booster module.

Abstract: Axial piston hydraulic pump, comprising at least one piston (2), coupled by suitable transmission means (103, 113) to drive means (3) and slidable with a reciprocating motion inside a cylinder (101), the said cylinder (101) communicating with a fluid intake passage (151) and a fluid delivery passage (161, 301), one-way means (121, 501) of controlling the flow of the fluid being provided in both passages; the said delivery passage (301) communicates, downstream of the said one-way flow control means (501), with a constricted flow discharge member (401, 411, 431, 441).

Abstract: A vacuum relief unit and method for venting air into a pool pumping system when a pressure level within the system drops below a first pressure level limit. The unit includes a closed air chamber, a device for venting chamber air from the air chamber into the pool pumping system when the pressure level in the pool pumping system drops below the first pressure level limit, a device for venting atmospheric air into the air chamber when the pressure level within the air chamber drops below a second pressure level limit that is lower than the first pressure level limit, and a device for delaying operation of the atmospheric air venting device when the pressure within the air chamber is no longer below the second pressure level limit.

Abstract: A flow amplifying poppet valve is useful in hydraulic circuits requiring low leakage when in a loaded condition. Undesirable pressure fluctuations effect the stability of the poppet. Tilting of the poppet valve within the bore increases friction that degrades repeatability. The subject invention provides a flow amplifying poppet valve that dampens valve oscillation caused by pressure fluctuations and provides for a constant guide length to prevent poppet valve tilting in the bore. The flow amplifying poppet valve assembly comprises a poppet valve slidably disposed within a bore that includes a poppet seat for engaging the valve seat to meter the flow of fluid between the inlet and the outlet. The poppet valve and bore have radially overlapping shoulders movable axially toward and away from each other to define a pressure chamber that accumulates fluid for dampening poppet valve oscillation.

Abstract: A continuous water level controller includes a base member, a sleeve mounted in the base member, a piston assembly and an actuating linkage. A stopper is attached to one end of the shaft in the base member to close the outlet of the base member. A piston is slidably received in said sleeve and securely attached to the shaft. A spring is mounted around the shaft between the stopper and the piston. The time the outlet is open is controlled by the restitution force of the spring and the siphonage between the piston and the sleeve. Consequently, the distance the piston travels controls the volume discharged from the outlet to achieve the goal of continuous control.

Abstract: A pilot controlled valve for motor vehicle tank systems whose valve body consists of two parts (10, 12). In the first housing part (10) an inlet duct (14), an outlet duct (16), an annular valve seat (20) and an annular duct (18) surrounding the latter are formed. A valve closure member (24) is urged by a compression spring (26) into engagement with the valve seat (20) and on a side thereof remote from the valve seat defines a pressure equalizing space (22), which is formed in the second housing part and connects a pressure equalizing duct (52) with the inlet duct (14). By means of a pilot valve (30, 32) a flow path (42) between the pressure equalizing space (22) and the outlet duct (16) is controlled. In the pressure equalizing duct (52) a check valve (54, 56) is arranged adapted to shut in the direction of flow from the pressure equalizing space (22) to the inlet duct (14). This means that the valve is counter pressure resistant.

Abstract: A measure for use in dispensing drinks and other liquids which are of relatively high viscosity, such as cream based liqueurs, having a measuring chamber with an entry port and an exit port, an internal operating standard and an actuator to move the internal operating standard between a dispensing position in which it seals the entry port and a resting position in which it seals the exit port. The dispensing measure is also provided with a nose external to the measuring chamber, whereby having an external surface for guiding fluid flow which is fluid being dispensed from the measuring chamber flows through the exit port, on the external surface of the nose and into a receptacle held beneath. The internal operating standard has a portion which is cylindrical and fits slidably within a cylindrical internal wall of an outlet portion positioned at the exit port so that the internal wall is wiped clean as the internal operating standard returns to its resting position.

Abstract: A pneumatic time delay valve primarily adapted for use in the ejection system of electronic or optical countermeasure devices and the like wherein an explosive squib is employed to create a momentary charge of high pressure gas used to depress the firing pin on the device to activate the device and also to push the device out of an ejection tube. The invention comprises means for splitting the pressurized gas into a first conduit communicating with the firing pin and a second conduit communicating with the device to apply the ejection pressure thereon and a time delay valve disposed within the second conduit for delaying the application of the gas to the device. During the time delay period, a piston is forced down a cylindrical bore forcing metering fluid through an orifice.

Abstract: The non-return valve comprises a housing provided with an inlet connection, a coaxial installation opening, and an outlet connection. An insert is secured in the installation opening to define a chamber with a cover on the valve. A movable valve body means includes a piston which divides the insert chamber into two cylindrical chambers while connecting ducts lead from the respective cylinder chambers to the housing chamber on the outlet side. A damping member is provided on the movable valve body system in the form of an annular ring to penetrate into the duct leading from the lower cylinder chamber when the valve closes to bring about a throttling action. Shock-like closure of the valve is thus eliminated in a simple and operationally reliably manner.

Abstract: A cyclically-operable valve comprises a timer including a reciprocatable member driven by the pressurized fluid through forward strokes, return means for driving the member through return strokes, and a dashpot device coupled to the member and retarding its movement through one of said strokes.

Abstract: This invention describes a pneumatic timing valve, in which one end of a plunger projects into a chamber in constant communication with the atmosphere and is displaced by fluid means into its operating position against a return spring force, an incoming pneumatic pressure signal initially being vented via the chamber. A shutter element situated in the chamber and controlled as regards time by another spring force and a restrictor system, neutralizes the venting of the pressure signal after expiration of a preset delay period, to generate a control signal. The restrictor system is separately in communication with the atmosphere and comprises a restrictor path adjustable in its effective length. In order that shorter time-lags may be set precisely within a comparatively large delay range, the invention provides that the operating position of the plunger is adjustable.

Abstract: A pulsation limiter for a manually actuated hydraulic valve includes a spring biased, motion retarding plunger in an auxiliary bore within the valve housing and having a helical groove disposed on its periphery abuts against the input sleeve during the initial portion of its travel to actuate the brakes, a check valve in the plunger allowing filling of the expanding cavity in the auxiliary bore behind the motion retarding plunger. When the brake pedal is released partially or completely, the input sleeve moves until it abuts against the plunger. Thereafter, the pressure buildup in the auxiliary bore cavity closes the check valve in the plunger and the input sleeve can only move relatively slowly back to its initial position as the fluid trapped in the auxiliary bore cavity exits through the helical groove.

Abstract: A diaphragm means for driving a secondary throttle valve in a two-barrel carburetor of the type wherein the secondary throttle valve is opened by a diaphragm means actuated by the venturi vacuum when the primary throttle valve is opened, including an expanding and contracting diaphragm rod, which is normally contracted but which is expanded against a spring face when the secondary throttle is being forcibly held closed during high-speed running, and whose contraction is damped.

Abstract: A valve arrangement for controlling the flow of fluid from an inlet passage to the cylinder of a reciprocating piston engine wherein the valve is opened by a cam against the resistance of a valve closing spring and compressed gas above a plunger connected to the end of the valve stem and slidingly positioned within an enclosed chamber and which valve closing spring and compressed gas provide the forces for effecting rapid closing of the valve.

Abstract: An integral device for controlling the rate of throttle closure and for preventing after run of an internal combustion engine is provided which utilizes a pair of diaphragm assemblies for accomplishing both functional operations. The device includes a dash pot stem having an axial opening through it. The opening is operatively connected to a source of engine vacuum. A diaphragm housing defining a chamber has a pair of diaphragm assemblies positioned in it. A first diaphragm assembly is mounted to the dash pot stem. The second diaphragm assembly is movably mounted on the dash pot stem and includes a shaft extending through the housing. The shaft is engagable with suitable linkage means operatively connected to a throttle valve of a carburetor for the engine. Upon engine start, the application of engine vacuum to a first side of the first diaphragm operates on the diaphragm and housing so that, in effect, the housing moves in a first direction, positioning the shaft at its curb idle position.

Abstract: A unitary device for controlling the rate of throttle closure and for preventing after run of an internal combustion engine is provided with simplified structure, the structure using a single shaft assembly for both functional operations. The shaft assembly is operatively connected to a diaphragm assembly which moves in response to forces acting to position the shaft assembly. The shaft assembly is an axially aligned and concentrically arranged combination, and includes a first shaft element which acts against the diaphragm assembly to bring a carburetor for an internal combustion engine slowly to its curb idle setting upon throttle release from some running condition. A second shaft element of the shaft assembly is controlled by a solenoid. The second shaft element acts against the diaphragm assembly upon ignition system de-energization, and permits the closure of the throttle below the curb idle setting of the carburetor.

Abstract: A shut-off valve for the automotive fuel system is operable to shut off the fuel flow whenever a positive pressure exists in the fuel line between the fuel tank and the shut-off valve. The shut-off valve may be employed in combination with a fuel pump or may be employed separately in the fuel line and comprises a flexible diaphragm connected by a stem directly to the valve member and movable with the valve member. The diaphragm air chamber has an air vent controlled by a vent valve providing a relatively large opening for bleeding in air and providing a relatively small opening for exhausting air from the diaphragm air chamber. The vent valve thus permits a relatively fast movement of the valve member to an open position and a relatively slow or restricted movement of the valve member toward a closed or partially closed position.