Abstract: In a miniflow valve which is disposed in a miniflow pipe that is connected between the discharge side and suction side of a main pipe where a liquid fed under pressure by a centrifugal pump circulates, and which is opened when the head of the centrifugal pump has exceeded a predetermined value, thereby to return a fluid from the discharge side onto the suction side through the miniflow pipe; a miniflow valve including a pilot valve which is opened or closed on the basis of the differential pressure between the discharge side pressure and suction side pressure of the liquid, and a main valve which is opened or closed in accordance with the opening or closing operation of the pilot valve. The miniflow valve has the simple configuration, and can be opened or closed at a high precision.

Abstract: An apparatus for preparing a beverage provided with a storage tank, a heater and a three-way valve. The three-way valve is provided with in inlet, a first outlet and a second outlet. The three-way valve is provided with a first member which is freely movable between a first and second extreme position wherein the first member can move under the influence of the liquid flow from the inlet to the first outlet and/or the second outlet from the first extreme position towards the second extreme position and in the second extreme position closes off the first outlet so that the liquid flow then extends from the inlet to the second outlet.

Abstract: A combination check valve and pressure relief valve is provided for use in regulating the flow of fluid between a first fluid side and a second fluid side. The valve may include a valve body, a valve insert positioned within an aperture of the valve body, a check poppet attached to the valve insert, and a check spring positioned between the valve insert and the valve body. In addition, a relief spring and a relief poppet may be positioned within a cavity formed by the valve insert and secured in position by the check poppet. The combination of the valve insert and the check poppet is adapted to move relative to the valve body and against the force of the check spring to permit fluid to pass from the first fluid side to the second fluid side, and the relief poppet is adapted to move relative to the check poppet against the force of the relief spring to allow fluid to pass from the second fluid side to the first fluid side.

Abstract: A pump assembly for a penile implant is provided having a mechanism which prevents spontaneous inflation of the cylinders implanted within the user. The preventative mechanism uses overpressure generated by the reservoir during unintentional compression to effectively seal the pump assembly from unintended fluid flow. The prevention mechanism itself creates all necessary forces to prevent the undesired fluid flow to the cylinders. This is accomplished by incorporating appropriate mechanisms within the pump itself.

Abstract: The present invention relates to the field of check valves and more specifically to check valves with substantially low operational noise or low shut off noise. Provided is changing a direction of a fluid that closes a first and second flap to produce a slit, gap or orifice. Also provided is passing the fluid through the slit that reduces the speed of the fluid. The reduced speed fluid slowly closes a third flap and reduces shut off noise. The closed third flap creates a tight seal to stop any further fluid flow.

Abstract: To protect hydraulic assemblies, in particular to protect hydraulic brace systems, pressure relief valves 1 are used, the closing part 10 of which is formed by a piston 15, which is connected to the connection 4, and the valve spring retainer 12, which comprises said piston, is arranged displaceably thereon and accordingly has a cylindrical design. Between the connection 4, which is equipped with a blind hole 5 and radial bores 6, 7, and the displaceable closing part 10 and/or the correspondingly shaped valve spring retainer 12 a damping chamber 20 is formed, which is directly connected to the blind hole 5 and hence to the system pressure.

Abstract: A combination check valve and pressure rise rate valve is provided for regulating the flow of fluid between a first fluid side and a second fluid side. The valve may include a valve body, a valve insert positioned within an aperture of the valve body, and a check poppet attached to the valve insert. In addition, the valve may include a cylinder positioned within the valve insert, a piston slidably positioned within the cylinder, a spring positioned between the cylinder and the valve insert, and an accumulator formed between the cylinder and the piston.

Abstract: A combination valve including a valve body having an inverted bi-directional valve portion and an umbrella portion is disclosed. In accordance with one aspect of the invention, a combination valve includes a valve body with a substantially cylindrical portion defining a flow path, a resilient umbrella valve portion extending annularly from the valve body and an inverted bi-directional valve portion provided in the flow path. The inverted bi-directional valve portion includes an interior surface, an exterior surface and at least one normally closed slit extending therebetween, wherein the exterior surface of the inverted bi-directional valve portion includes a generally concave curved portion when the slit is closed.

Abstract: A combination check valve and pressure relief valve is provided for use in regulating the flow of fluid between a first fluid side and a second fluid side. The valve may include a valve body, a valve insert positioned within an aperture of the valve body, a check poppet attached to the valve insert, and a check spring positioned between the valve insert and the valve body. In addition, a relief spring and a relief poppet may be positioned within a cavity formed by the valve insert and secured in position by the check poppet. The combination of the valve insert and the check poppet is adapted to move relative to the valve body and against the force of the check spring to permit fluid to pass from the first fluid side to the second fluid side, and the relief poppet is adapted to move relative to the check poppet against the force of the relief spring to allow fluid to pass from the second fluid side to the first fluid side.

Abstract: This invention relates to a pressure compensating valve and more particularly, but not exclusively, to a balanced pressure compensating valve, or regulator. The valve includes a chamber (6) for containing fluid, defined by a flexible barrier (2) trapped between first (3) and second (4) surfaces. A fluid inlet provides fluid to the interior of the chamber. A fluid outlet selectively allows fluid to pass out of the chamber. Movement of the first (3) and second (4) surfaces relative to each other causes change in contact between the flexible barrier and the first and second surfaces to selectively open the fluid outlet, in a first position, and occlude it between the flexible barrier and one of the surfaces, in a second position.

Abstract: A member that is driven by a hydraulic actuator tends oscillate when fluid flow to the hydraulic actuator is terminated. A pressure relief device reduces that oscillation by connecting first and second first relief valves to the hydraulic actuator. The first relief valve provides a relatively large first relief passage as long as pressure in the hydraulic actuator remains above a threshold. A second relief valve opens a second relief passage at substantially the same threshold pressure and thereafter remains open as long as the pressure remains above another lower threshold. A timer causes the second relief valve to close a given interval of time, if the pressure does not drop below the other lower threshold.

Abstract: A check valve construction is provided which includes a housing having a first flow path and a second flow path. Liquid flow is controlled within the first and second flow path by movable plungers (22, 24) having a sealing surface and a plurality of prongs that control the length of movement of the plunger within the housing. One of the plungers permits liquid flow while the other of the plungers prevents liquid flow in response to pressure change within the flow paths.

Abstract: A freezeless wall hydrant has a fluid inlet end connected to a source of pressurized water, and a fluid outlet end. A check valve is placed in the bore of the valve body and is spring loaded to open only when extreme water pressure within the inlet valve lifts a spring loaded piston element to permit the highly pressurized water to move through the bore in the valve body and be relieved as it escapes rearwardly into the original source of pressurized water.

Abstract: A voice prosthesis that is formed of a soft, elastomeric body containing a spring loaded ball valve, preferably a non-impervious, smooth ball such as a ruby ball biased by a flat helical spring against a seat mounted in a rigid cartridge. An insertion device includes a handle with expandable tip which enters and locks within the cartridge.

Abstract: An automatically operating valve for use for example in a forecourt fuel pump has a body (10) defining a flow passage (20) within which is formed a valve seat (22), the body having a weakened zone (16) around the flow passage (20) such that an impact on the body will fracture the body at the weakened zone. A valve member (30) is mounted for movement within the flow passage (20) and is engageable with the valve seat (22) to close the valve. A closing mechanism effects movement of the valve member (30) to its closed position in the event that the body (10) is fractured at the weakened zone. Further, the valve member (30) is configured to move to its closed position under the influence of excessive flow of liquid through the flow passage (20).

Abstract: The invention relates to a backflow preventing check valve (1) comprising a housing (2) in which a closing member (3) is arranged. The closing member is moveable between a closed position and an open position and is disposed on a valve seat with a sealing area in the closed position. A pressure-compensation device is provided for when the backflow preventing check valve is closed and a volume of fluid is sealed off on the outflow side. In order to counteract an undesireable high pressure load when the check valve is closed, the outflow area defined by the closing body (3) in a closed position is joined to at least one pressure compensation chamber (6) whose receiving volume corresponds approximately to the expansion volume of the sealed-off fluid and which is disposed outside the area which is defined on the outflow side.

Abstract: A fuel tank for a motor vehicle has means for delivering fuel from the tank to the engine, means for the introduction of air into and the venting of air from the tank, and a filler pipe which can be closed at its intake end and which at its outlet end into the interior of the tank has at least one valve which can sealingly close at least upon a blowback of fuel thereto. At least one second valve is disposed in the filler pipe in the region of the outlet end thereof. The first valve in the filler pipe can be bridged by way of the second valve.

Abstract: A fluid mixing device, for the continuous mixing of two or more fluids, having a mixing chamber which has fluid contact surfaces defining an internal chamber region, a fluid inlet, for feeding fluid into the chamber region, a fluid outlet, for feeding fluid out of the chamber region, and a fluid mixer within the chamber region which is capable of inducing mixing of two or more fluids within a mixing region. The mixing chamber is configured so that the dead volume within the chamber region is filled in such a way that the mixing region corresponds to the chamber region. A fluid inlet valve for use in the fluid mixing device has entrance and exit aperture sealing means which are adapted to allow passage of fluid respectively into and out of a body portion of the valve, according to a specified pressure differential between the pressure externally of the entrance aperture and the pressure externally of the exit aperture.

Abstract: A Lube Regulated Pressure Regulator Valve including an internal check valve that passes transmission fluid from the hydraulic pump in an amount sufficient to fill the torque converter in the Park gear range and at low engine speeds is disclosed. The internal check valve opens at a substantially lower line pressure than is required to open the original equipment manufacture pressure regulator valve to ensure the torque converter is operational at engine startup. As engine speed increases and sufficient line pressure builds up within the torque converter charge circuit, the internal check valve is closed and the pressure regulator valve opens as it would normally to feed line pressure to the torque converter directly. When the engine is shut off, the internal check valve is biased to a closed position preventing automatic transmission fluid from draining back from the torque converter through the pressure regulator valve to the fluid sump.

Abstract: A fluid compressor controls opening and closing of a fluid intake port in the crankcase with a novel and improved form of gate control member which follows rotation of the crankshaft and times the opening and closing of the intake port to coordinate with the intake and discharge strokes of a piston which is reciprocal through a cylinder bore communicating with the crankcase, the piston having an intake valve, and a cylinder head at the end of the cylinder bore having only a discharge valve.

Abstract: An ant-pressure surge device mounted in or on a closure member (1) of a check valve to eliminate overpressure and reduce shock waves in a pipeline when the check valve closes. The anti-pressure surge device comprises a fast acting flow relieving valve having a flow path sufficient in the open position to relieve the reverse flow on closure of the check valve closure member and is designed to open when the back pressure shock wave on the downstream side of the valve approaches a predetermined value. A suitable anti-pressure surge device comprises a poppet comprising a piston portion (7) and a sealing element (7A) moveable by the back pressure shock wave against resilient disk springs (10).

Abstract: A flow control valve is disclosed wherein a housing defines a flow chamber with an inlet and an outlet. Disposed within the flow chamber is a poppet assembly comprising an inner poppet and an outer poppet. A first spring is selected to bias the outer poppet to seal closed the inlet below a predetermined fluid flow rate. Above the fluid flow rate, the force of the fluid against the outer poppet compresses the spring, breaking the seal and allowing fluid to flow into the fluid flow chamber. Inside the outer poppet is an inner poppet which extends from the outer poppet. A second spring biases the inner poppet predominantly within the outer poppet, but an increased pressure inside the outer poppet collapses the second spring and extends the inner poppet in a fully extended position. Fully extended the inner poppet shuts the outlet of the fluid chamber thereby arresting the flow.

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 freezeless wall hydrant has a fluid inlet end connected to a source of pressurized water, and a fluid outlet end. A check valve is placed in the bore of the valve body and is spring loaded to open only when extreme water pressure within the inlet valve lifts a spring loaded piston element to permit the highly pressurized water to move through the bore in the valve body and be relieved as it escapes rearwardly into the original source of pressurized water.

Abstract: A quick connect coupling for use with a conduit having a free end with a bead is disclosed. The coupling includes an elongated tubular and cylindrical housing having a female end portion at one end and a male end portion at its other end. An axial passageway is formed through the housing and forms a fluid passageway connecting the female end to the male end. The housing, furthermore, includes a first part and a second part which are coaxially detachably secured together at a midpoint of the housing. A retainer positioned within the female end portion automatically lockingly engages the bead on the conduit upon insertion of the conduit into the female end portion on the first housing part. A one-way check valve is contained within the second housing part which enables fluid flow in a single direction through the fluid passageway.

Abstract: Apparatus for controlling the flow of fluid includes a gravity sensitive valve for receiving fluid from a fluid flow passageway and a pressure activated valve located downstream from the gravity sensitive valve. The gravity sensitive valve interrupts flow of fluid when the apparatus is not in use to prevent inadvertent opening of the pressure activated valve.

Abstract: A plumbing system which, when ambient outdoor temperatures drop below freezing, circulates water to prevent it from freezing, utilizing a check valve to prevent water from flowing back into the water main and further utilizing a relief valve which can open to the atmosphere and relieve pressure in the system if necessary. The system can have two separate circulation pumps, one for hot water and one for cold water.

Abstract: A mechanical leak arresting valve is disclosed in which fluid through the valve is limited to a range between a predetermined minimum flow rate and a predetermined maximum flow rate, and where both a small or large downstream leak mechanically causes the valve to lock closed. The present invention uses a locking mechanism triggered by a pressure differential resulting from the downstream leak to block the flow of fluid through the valve until the fluid source upstream is stopped. Reduction of the upstream pressure by the stopping of the fluid source automatically resets the valve without further manipulation.