Abstract: A structure includes: a first member made of metal having a tubular shape, and having a through-insertion hole; a second member made of resin and joined to the first member; and a third member made of metal having a tubular shape, and inserted through inside the first member. The third member is tube-expanded toward the first member and joined to the first member by press-fitting.

Abstract: An internal pressure relief safety valve of a water heater includes: a valve body including a water inflow channel, a water outflow channel and a pressure relief channel, the water inflow channel communicates with the water outflow channel through a water outflow hole; a unidirectional water inflow assembly disposed in the valve body and used for allowing water flow to flow from the water inflow channel to the water outflow channel unidirectionally; a valve clack cooperating with a side wall of the pressure relief channel in a sliding and sealing way; a flexible sealing gasket installed at one end of the valve clack facing toward the pressure relief port and used for cooperating with the pressure relief port; and a pressure relief spring used for applying pressure to the valve clack, so that the flexible sealing gasket blocks the pressure relief port.

Abstract: A compressor may include a crankcase, a crankshaft, a piston, a discharge valve and a suction plenum. The crankcase defines a discharge plenum receiving working fluid at a first pressure. The crankshaft is disposed within the discharge plenum. The piston is drivingly connected to the crankshaft and reciprocatingly received in a cylinder. The piston and cylinder cooperate to define a compression chamber therebetween. The discharge valve may control fluid flow through a discharge passage between the compression chamber and the discharge plenum. The suction plenum may receive working fluid at a second pressure that is less than the first pressure. The suction plenum may provide working fluid at the second pressure to the compression chamber.

Abstract: A pumping device compresses fluid, provides a vacuum, or both compresses fluid and provides a vacuum. A pumping device may be used to force gas through a sieve bed, draw gas out of a sieve bed, or both force gas through a sieve bed and drawing gas out of a sieve bed. A pumping device may be operated at high speed to provide a high fluid flow rate with a small pumping device.

Abstract: A pumping system comprises a pump, first and second channels, a valve, and an actuator. The pump pumps fluid according to a pumping cycle. The first channel has a first fluid flow orifice with a first diameter, while the second channel has a second fluid flow orifice with a second diameter greater than the first diameter. The valve is configured to direct fluid from the pump to the first channel in a first state, and to the second channel in a second state. The actuator is configured to switch the valve into the first state during a high pressure period of the pumping cycle, and into the second state during a low pressure period of the pumping cycle.

Abstract: A method for the high-pressure delivery of a mixture comprises delivering at least first and second fluids. The method comprises operations consisting in forming a mixture of fluids in a mixing zone having a pressure that is less than the desired high pressure and bringing the pre-mixed fluids to the high pressure. The first fluid is introduced into the mixing zone by a pumping operation that is performed by a high-pressure pump that is positioned downstream of the mixing zone. A device for performing the method is described.

Abstract: A high-pressure pump (8) for providing a pressurized supply of fuel in an engine furnished with a common rail type fuel injection apparatus is provided with two actuators (88, 89). Of these actuators (88, 89), one (88) is stopped and the operation for providing a pressurized supply of fuel is performed from only the other actuator (89), so that the timing at which the load torque that acts on the crankshaft of the engine becomes a local maximum and the timing at which the load torque that acts on the driveshaft of the high-pressure pump (8) becomes a local minimum are made to coincide with one another.

Abstract: In the suction valve structure of the piston type compressor of the present invention, the primary suction valve 38 is a flexible deforming valve composed of a deforming section 381, which is supported and bent by a cantilever method, and a closing section 382 which connects with a forward end of the deforming section 381 and closes the primary suction port 21. The auxiliary suction valve 39 is a flexible deforming valve composed of a deforming section 391, which is supported-and bent by a cantilever method, and a closing section 392 which connects with a forward end of the deforming section 391 and closes the auxiliary suction port 22. In the present invention, the length of the deforming section 381 of the primary suction valve 38 is approximately the same as that of the deforming section 391 of the auxiliary suction valve 39, however, the width of the deforming section 381 of the primary suction valve 38 is made larger than that of the deforming section 391 of the auxiliary suction valve 39.

Abstract: A fuel injection pumping apparatus has a cam (9) actuated reciprocable plunger (13) housed in a bore (11) into which fuel flows from a fuel supply (7,14). An outlet (12) extends from a pumping chamber (13A) defined by the plunger and bore. A spill passage (19) communicates the pumping chamber with a spill valve (16) so that fuel from the pumping chamber which flows through the passage and spill valve (20) flows into a cylinder (21) containing a resiliently biased piston (17). The fuel which flows into the cylinder is returned to the pumping chamber during outward movement of the plunger and the fuel supply (14,7) ensures that the pumping chamber is completely filled with fuel. A safety valve (30,31) allows fuel to escape from the cylinder (21) in the event that the piston (17) sticks in the cylinder.

Abstract: A split-discharge balanced dual-lobe vane-type rotary hydraulic machine that comprises a housing, a rotor mounted within the housing and having a plurality of radially extending peripheral slots, and a plurality of vanes individually slidably mounted in the rotor slots. A cam ring within the housing surrounds the rotor and has a radially inwardly directed surface forming a track for sliding engagement with the vane. Opposed symmetrical pressure cavities are formed between the cam ring surface and the rotor, and fluid inlet and outlet passages in the housing are coupled to the fluid pressure cavities. The fluid inlet and outlet passages include a fluid inlet port opening into each cavity adjacent to one circumferential edge thereof, a first fluid outlet port opening into each cavity adjacent to the opposing circumferential edge thereof, and a second fluid outlet port opening into each cavity at a position circumferentially between the inlet and first outlet ports.

Abstract: The invention relates to a compressor (2) which is encapsulated in a housing (4) and which can be rotated about the axis (16) of its crankshaft (8) while maintaining the oil lubrication of the moving parts of the compressor. The interior (14) of the housing (4), in which an oil sump (18) is located, is connected flow-wise to the compressor (2). According to the invention, the interior (14) is connected to two gas lines (24, 26) which lead to a common manifold (32) via at least one shutoff valve (28, 30). The connecting openings (25, 27) of the two gas lines (24, 26) leading into the interior (14) are arranged opposite to one another in the vicinity of the axis (16) of the crankshaft (8). By these measures, the compressor can be inclined relative to the horizontal over a wide angular range without lubricating oil flow into the gas loop.

Abstract: A free piston engine pump (FPEP) converts combustion energy into hydraulic power in an efficient, controlled and relatively uncomplicated manner, for example, for vehicle propulsion, auxiliary system power, etc. The FPEP is substantially naturally mass balanced having opposed engine pistons driving respective in-line hydraulic pumps. An adjustable accumulator with a deformable fluid-tight chamber containing a compressible fluid stores and delivers energy for compression, and an arrangement of control valves and check valves enables selective operation of the FPEP in primary (high flow) and secondary (high pressure) modes. Plural FPEP's may be interfaced for parallel operation sharing common elements and functions. Cycle rate, intermittent operation and start-up also may be controlled. Electronic monitoring and control of one or more operational parameters of a FPEP also are disclosed.

Abstract: A combined delivery and damping valve unit for a fuel system of a compression ignition engine comprises a body having a bore including a wider portion and a narrower portion. A spring abutment for the spring biasing the delivery valve member serves as a seating for a damping valve member. The abutment is retained against the step defined between the wider and narrower portions of the bore by locking members having a wedge section and biased by a spring.

Abstract: A method and apparatus for pumping combustible gases at high pressure without raising the gas to its combustion temperature, the apparatus including a piston-type pump having an intake chamber communicating with a cylinder through intake valves, a discharge chamber communicating with the cylinder through discharge valves, the intake chamber and the discharge chamber having cooling means therearound for cooling gas in the chambers, the valving being such that gas must pass entirely through the intake chamber for maximum cooling on intake, and gas must pass entirely through the discharge chamber on discharge for maximum cooling on discharge, some gas being held in the discharge chamber during compression of the gas for maximum cooling.

Abstract: An air control valve for directing the flow of air from an internal combustion engine driven pump and including differential pressure actuating means includes a pilot valve responsive to engine induction vacuum level to provide induction vacuum, atmospheric air or air from the pump to the actuating means. The pilot valve includes a chamber having openings communicating with the pump and the actuating means, a restricted orifice to atmosphere, a valve element capable of selectively closing either of the openings, a differential pressure motor actuated by induction vacuum and a tube projecting through the actuating means opening into the chamber, the tube being axially positionable by and in communication with the differential pressure motor to co-act with the valve member and openings to supply high pressure air, atmospheric air or induction vacuum to the actuating means according to the level of induction vacuum.