Abstract: A piston pump for a high-pressure cleaning appliance is provided, including a pump block having a plurality of pump chambers, into each of which one piston plunges, and including a pump head having a suction inlet and a pressure outlet, each pump chamber in flow connection via a suction valve with the suction inlet and via a pressure valve with the pressure outlet, and including a clamping bracket engaging around the pump head. The piston pump can have a single U-shaped clamping bracket oriented symmetrically in relation to the longitudinal pump axis, and the pump head and the pump block form between them downstream of the pressure valves a pressure chamber in which a central, piston-like insert part is arranged, the insert part being surrounded by a sealing element and having a passage, and a pressure line oriented coaxially with the longitudinal pump axis being arranged downstream of the passage.

Abstract: An air compression apparatus has a frame, a tank, and a motor. A drive mechanism is operably connected to the motor and at least one piston assembly is operably connected to the drive mechanism and configured to move within a respective cylinder mounted to the frame. The piston assembly includes: (1) a piston body; (2) a piston rod having a hollow bore connected at one end to the drive mechanism and at an opposite end to the piston body; and (3) a piston valve installed on the piston body. In use, upward travel of the piston body as caused by the drive mechanism acting through the piston rod opens the piston valve and allows ambient air to be drawn through the hollow bore into the cylinder, and downward travel of the piston body closes the piston valve so as to compress the air within the cylinder.

Abstract: A dual-direction pump includes two cylinders arranged on opposite sides of a head portion and an inlet return-flow prevention device and a leakproof device mounted between the cylinder and the head portion for avoiding leakage at the juncture between the cylinder and the head portion or leakage induced by reverse flow in one of the cylinders in the case of a single-sided pumping operation in the other cylinder. The head portion has an outlet port to which an outlet return-flow prevention device is mounted. A knob is rotatably mounted to the outlet pot and a nut is fixed to the knob for selectively engaging an inflation valve to avert detachment. The outlet return-flow prevention device prevents reverse or return flow induced in the outlet port in order to reduce resistance caused thereby and enhances pumping efficiency.

Abstract: Container for storing food products including a base defining a product support surface for supporting the food product and a cover releasably engaging with the base such that when the cover engages with the base, a storage compartment is defined by the cover and the base. The cover includes an air control unit for controlling air pressure in the storage compartment and a window extending downward from the air control unit to surround food products in the storage compartment. A product supported on the product support surface of the base is visible through the window when the cover engages with the base. By providing the window as part of the cover, the base is separable from the window to thereby expose the product support surface of the base so that cakes can be easily placed on the product support surface and then enclosed by the cover.

Abstract: A dual-direction pump includes two cylinders arranged on opposite sides of a head portion and an inlet return-flow prevention device and a leakproof device mounted between the cylinder and the head portion for avoiding leakage at the juncture between the cylinder and the head portion or leakage induced by reverse flow in one of the cylinders in the case of a single-sided pumping operation in the other cylinder. The head portion has an outlet port to which an outlet return-flow prevention device is mounted. A knob is rotatably mounted to the outlet pot and a nut is fixed to the knob for selectively engaging an inflation valve to avert detachment. The outlet return-flow prevention device prevents reverse or return flow induced in the outlet port in order to reduce resistance caused thereby and enhances pumping efficiency.

Abstract: A fluid translating device is provided that includes a first member having fluid inlet/outlet ports and a second member having a plurality of pistons disposed therein secured to a stationary central shaft. A camplate and port plate is disposed in the fluid translating device about the stationary central shaft and located between the first and second members. The camplate is in communication with the fluid inlet/outlet ports and the plurality of pistons is in mating contact with the port plate. An outer input/output member is secured about the camplate and is rotatably disposed about the first and second members to form a compact arrangement.

Abstract: Replace the abstract in the instant application with the following abstract: A compressor has a reciprocating piston operating in a working area to compress the working medium, a drive unit for the reciprocating movement of the piston, and an intake and discharge device for supplying and expelling the working medium. The liner, in which the piston reciprocates, is manufactured as one piece with a valve plate. Further, the slider crank mechanism used to drive the piston is provided as a drive unit. As a result, the size of the compressor can be substantially reduced, virtually vibration-free motion is achieved, and the compressor reliability is appreciably enhanced.

Abstract: A fuel injection system for injecting gasoline or other fuel directly into the combustion chambers of an internal combustion engine includes a fuel pump having a fixed barrel member therein which has a plurality of bores forming cylinders extending therethrough. A pumping piston extends into one open end of each of the cylinder bores. The piston is supported for reciprocal movements as produced by an input mechanism, such as a shaft and swash plate. A fluid inlet passage and inlet check valve are positioned at one end portion of each piston so that fluid can be drawn into the pumping chamber formed by the cylinder bore and piston. The other open end of the cylinder bore in the barrel member serves as an outlet for fluid from the pumping chamber and a flat reed valve portion of an outlet valve plate overlies the open end to prevent fludi from reentering the pumping chamber during an inletting stroke.

Abstract: An air pump with dual air intakes includes a hollow pump body, a securing cover, a piston rod, a piston, an air outlet, a check valve, an air duct and a handle. The pump body has one end connected to the air outlet and the check valve. The peripheral rim of the pump body near the air outlet is provided with multiple air inlets. A diaphragm is disposed at the inner side of the peripheral rim. The other end of the pump body is connected to the securing cover provided with multiple air inlets. A diaphragm is secured to the inner side of the securing cover. Both diaphragms may cover the corresponding air inlets. The piston is connected to one end of the piston rod and is provided with an annular groove at its periphery. The annular groove has through holes communicating with the piston rod and is fitted with an annular gasket. The piston rod has fitted therein the air duct connecting to the air outlet. The other end of the piston rod projects from the pump body and connected to the handle.

Abstract: A cylindrical gas compressor has inlet valves confined therewithin, at opposite ends thereof, and discharge valves, shaft-mounted therebetween, for reciprocation to ingest and compress admitted gas. Outboard of the inlet valves are circular plates from which extend a plurality of fingers. The plates are confined within chambers in the compressor, and radial ports are provided for admitting pressured fluid to the plates to cause them to move inboard, whereby the fingers penetrate the inlet valves and remove the inlet valve valving elements off the valve seat, effecting unloading of the inlet valves. Springs hold the plates outboard of the inlet valves, to allow the valves to function normally-loaded, in the absence of the plate-displacing, ports-admitted, pressured fluid.

Abstract: A reciprocating vacuum pump characterized in that each part to be lubricated of a crank moving portion and piston moving portions is made oilless, two pistons in the piston moving portions being formed so that their load working lines are aligned, a suction exhaust valve being provided on each of the two pistons. This pump may have a multistage structure in which two pistons extend in a horizontally opposed state. The reciprocating vacuum pump thus constructed is small in size and light in weight, and is substantially free from vibration.

Abstract: A tire pump comprises a first cylindrical body, a second cylindrical body, a two-way air admission piston, a piston rod, a first one-way valve, a hand grip, a second one-way valve, a third one-way valve, a fourth one-way valve, and an air valve connection head. The second cylindrical body is fitted to one end of the first cylindrical body. The two-way air admission piston is disposed in the first cylindrical body in such a way that it divides the first cylindrical body into two air-receiving spaces. The piston rod is secured to one end of the two-way air admission piston. The first one-way valve is disposed at one end of the first cylindrical body, while the second one-way valve and the third one-way valve are disposed at other end of the first cylindrical body. The fourth one-way valve and the air valve connection head are arranged at one end of the second cylindrical body.

Abstract: The assembly, designed for use in combination with a straight-cylinder, gas-compression chamber, has a center bolt which is threaded at opposite ends thereof to receive a pair of valve sets. Each of the latter has a ported valve seat, valve guard, and ported valve plate. The guard is set about the bolt, and against a shoulder formed on the bolt therefor. The seat is centrally threaded, to engage one of the threaded ends of the bolt, and it and the guard confine the valve plate therebetween. In that one of the valve sets is turned 180.degree. from the other, i.e., the two guards being in confrontation, and the two seats remotely disposed, vis-a-vis, the one valve set is open to fluid flow, while the other is closed, as the assembly is reciprocated in such a straight-cylinder, chamber. Identical valve sets, on different, short bolts set in end closures of such a chamber, serve as gas inlet valves, while the reciprocable assembly carries the discharge valves.

Abstract: The piezoelectrically driven diaphragm of an air pump is extended through a chamber and commmunicating outlet passage of the pump's housing. During vibration of the diaphragm, air pulses are alternately expelled through the outlet passage portions positioned on opposite sides of the diaphragm. The air pulses are collected in a rectifying device, carried by the housing, for delivery to a fluidic device or system.

Abstract: A pump having a hollow cylinder, and a piston slidably received in the cylinder, with the piston dividing the inside of the cylinder into two chambers. A hollow piston rod has one end connected to the piston and the other end extending out of the cylinder, and means is provided for attaching the other end of the piston rod to an inflatable member. The pump has one-way valve means adjacent each end of the cylinder to permit passage of air into each chamber, while preventing passage of air out of the chambers. Valve means is carried by the piston to establish communication between either of the chambers and the piston rod when the pressure in either chamber exceeds the pressure in the piston rod and inflatable member.