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7614386 |
Fuel pump
A manually operable priming pump has a housing formed with an inlet port adapted to be connected to a supply of fuel and an outlet port adapted to be connected to a fuel-delivery system, a body in...
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7611341 |
Capacity varying type rotary compressor
A capacity varying rotary compressor is provided. The compressor includes a casing that maintains a discharge pressure state, a motor installed in the casing that generates a driving force, one or...
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7607899 |
Compressor with capacity control
Compressor containing a pressure regulating system ( 8 ) comprising an inlet valve ( 9 ); a piston ( 23 ) in a cylinder ( 24 ) connected thereto; a bridge ( 14 ) of this inlet valve ( 9 ) with a...
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7553134 |
Switch valve structure of fluid machine
A switch valve structure of a fluid machine ( 10 ) having a pump mode to operate as a compressor and a motor mode to operate as an expander is disclosed. In pump mode, a communication path ( 106 )...
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7540721 |
Automatic inlet check valve release
Apparatus and method for releasing a stuck inlet check valve of a paint pump including a solenoid connected to the check valve with a pusher element which momentarily displaces a moveable element...
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7527595 |
Pump provided with exhaust valve device and hemodynamometer incorporating the same
A diaphragm is provided in a pump case so as to define a pump chamber communicated with an external member having an air chamber. The actuator is provided in the pump chamber. An exhaust valve is...
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7513753 |
Variable capacity scroll compressor
Disclosed is a variable capacity scroll compressor in which a high-pressure fluid within a thermodynamic cycle is introduced into the inside of the compressor to increase the compression volume and...
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7497230 |
Priming pump with reed valve
A fluid priming pump in combination with a reed valve for the control of incoming and exiting fluid flow is disclosed. The fluid priming pump includes a pump body and a movable plunger with the...
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7481628 |
Diaphragm pump
A diaphragm pump for pumping a fluid includes a housing, a pump chamber defined in the housing, a first diaphragm for sealing the pump chamber, a pressure control chamber defined in the housing...
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7431575 |
Auto valve priming pump
A priming pump for fluid delivery arranged with a base defining a flow inlet, a flow outlet, and a control valve positioned therebetween. The priming pump includes a housing assembled to the base...
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7377756 |
Rapid exhausting mechanism in pump unit
A diaphragm is provided in a pump case so as to define a pump chamber communicated with an external member having an air chamber. A motor actuates the diaphragm to introduce air to the air chamber....
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RE40344 |
Scroll machine with ported orbiting scroll member
A scroll compressor includes a fluid injection system. The fluid injection system includes a fluid passage which extends from a position outside of the shell of the compressor to the fluid pockets...
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RE40257 |
Compressor pulse width modulation
A scroll compressor includes a capacity modulation system. The capacity modulation system has a piston that is connected to the non-orbiting scroll that disengages the non-orbiting scroll from the...
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7331773 |
Pump provided with exhaust valve device and hemodynamometer incorporating the same
A diaphragm is provided in a pump case so as to define a pump chamber communicated with an external member having an air chamber. A motor actuates the diaphragm to introduce air into the pump...
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7278832 |
Scroll compressor with enlarged vapor injection port area
Scroll compressors are provided with vapor injection or by-pass ports that will allow greater flow of refrigerant through the port than was the case in the prior art. The prior art has typically...
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7270145 |
unloading/venting valve having integrated therewith a high-pressure protection valve
The invention relates to valves for air compressors, and more particularly, to an unloading/venting valve having integrated therewith a high-pressure protection valve where a pressure reducing...
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7255544 |
Housing including shock valves for use in a gerotor motor
A housing for a motor having fluid passages integrated within. The passages include a first passage for receiving a fluid from outside the motor, a second passage for directing the fluid away from...
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7226276 |
Multi-stage reciprocating vacuum pump and method of operating the same
A multi-stage reciprocating vacuum pump includes first ( 2 ) and second ( 4 ) pump chambers located in the pump housing ( 1 ) and in which respective pistons ( 6, 8 ) reciprocate, first and second...
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7207787 |
Scroll compressor with backflow-proof mechanism
A scroll compressor with a backflow-proof mechanism. The scroll compressor comprises a slider disposed on a scroll couple, forming several enclosed spaces. The slider is raised by the working fluid...
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7179060 |
Variable discharge pump with two pumping plungers and shared shuttle member
The present invention relates generally to variable discharge pumps, and specifically pumps used in fuel injection systems. Typically, such pumps include a dedicated spill control valve for each...
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7175397 |
Effervescent gas bleeder apparatus
A diaphragm metering pump suitable for metering an effervescent gas. The pump has a pump head with a product chamber having an inlet end with a one-way inlet valve and an outlet end with a one-way...
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7137788 |
Air compressor oil recirculation system
An apparatus for removing oil from air in an air compressor that has a piston reciprocable in a cylinder to compress the air, includes an oil removal chamber associated with the compressor. An...
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7137789 |
Vent for reducing seal pressure in pump assembly
An engine pump is provided which operates with an internal combustion engine or as a supplemental pump or as used in a stand alone device, and includes an internal vent for improved pump and motor...
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7134846 |
Radial piston pump with eccentrically driven rolling actuation ring
An hydraulic head features two or three individual radial pumping pistons and associated pumping chambers, annularly spaced around a cavity in the head where an eccentric drive member with...
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7128541 |
Oscillating displacement pump
An oscillating displacement pump, particularly a diaphragm pump (P) for liquid or gaseous delivery media, having a delivery space which on the one side is delimited by a pump head and on the other...
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7118349 |
High pressure slurry piston pump
A high pressure slurry pump is described which automatically provides a clean fluid buffer around the intake and exhaust valves of the pump and in front of the pump piston in order to displace...
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7033143 |
Pumping system with clutch and associated by-pass
This invention relates to a pumping system. The design of the system is such that bi-directional operation can be achieved using a significantly smaller and hence lighter unit than those currently...
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7029248 |
Device for venting a pump unit
A pump unit for the metered delivery of fuel to internal combustion engines. The pump unit comprises a housing which comprises a longitudinal bore. Located in the longitudinal bore is an overflow...
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7011507 |
Positive displacement pump with a combined inertance value of the inlet flow path smaller than that of the outlet flow path
A pump according to the present invention has a circular diaphragm 4 placed at the bottom of a casing 2 . At the bottom of the diaphragm 4 , a piezoelectric element 6 is installed in contact...
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7001160 |
Shoe with inflatable bladder and secure deflation valve
A valve designed to limit inadvertent operation of the valve. The valve has a shortened plunger, a collar to prevent tilt of the plunger, and a conformable ring on the valve face. The plunger is...
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6981851 |
Piston stroke limiting device for a reciprocating compressor
A piston stroke limiting device for a reciprocating compressor of the type including a piston ( 2 ) reciprocating inside a cylinder ( 3 ), which is closed by a cylinder head ( 4 ) and defines,...
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6971861 |
High speed unloader for gas compressor
A piston system for a reciprocating compressor is adapted for high speed, high pressure unloading conditions by providing a dual stage piston assembly wherein the piston is adapted for absorbing...
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6953326 |
Air pump having air cylinder/manual dual charging mode
An air pump includes a connector connecting to an air nozzle of an object to be inflated, a holder block connected to the connector and having a valve chamber, an air cylinder air inlet and a...
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6945763 |
Geared pump with forced lubricated coupling
A geared feed pump has a housing having a pump chamber in which a rotationally driven pair of gear wheels meshing with one another is disposed for pumping medium out of a suction chamber that...
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6905317 |
Oil pump apparatus
An oil pump apparatus includes a body, a first rotor and a second rotor disposed in the body so as to be able to rotate and a regulator valve mechanism for regulating the pressure of oil discharged...
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6884041 |
Electromagnetic valve-controlled fuel injection pump for internal combustion engines, especially diesel engines
A solenoid-valve-controlled fuel-injection pump for internal combustion engines, in particular diesel engines, has a solenoid valve, whose valve needle separates a high-pressure region from a...
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6877961 |
Vane pump with a bypass valve and passage arrangement for equalizing excess fluid flow through dual suction passages
In a housing of a pump apparatus having a flow control valve to discharge a part of excess fluid in a deviated slanting way to a bypass pass 11 , a pair of suction paths 19, 19 ′ is formed...
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6874989 |
Vacuum pump
A vacuum pump has a housing and a pump mechanism accommodated in the housing. An exhaust-passage forming portion is located outside of the housing. The exhaust-passage forming portion forms an...
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6863510 |
Vacuum preventing oil seal for scroll compressor
Disclosed is a vacuum preventing device for a scroll compressor comprising: a chamber formed at one side of a fixed scroll and having a suction hole, a compression hole, and a discharge hole at an...
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6863504 |
Fluid pump relief valve
A pump head for a fluid pump driven by a motor includes an inlet for receiving fluid at a first pressure and an outlet for outputting fluid at a second pressure greater than the first pressure. A...
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6860727 |
Air actuated hydraulic pump
A hydraulic pump is equipped with an air motor, which is disposed in a housing and oil reservoir of the hydraulic pump, connected to an air source, and has a piston movable in a tube so that...
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6860730 |
Methods and apparatus for unloading a screw compressor
A screw compressor is connected to a motor to be driven by the motor even during periods of low compressed air consumption. During such periods, the screw compressor is at least partially unloaded...
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6846166 |
Reciprocating diaphragm pump with degassing valves
In a reciprocating pump, drive power of a drive-power supply member is transmitted to a diaphragm within a diaphragm drive chamber via operating fluid. An operating-fluid-flow regulation chamber...
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6846162 |
Cylinder housing for air compressor
An air compressor includes a cylinder housing having a passage formed in one end, a piston slidably received in the cylinder housing and moved relative to the cylinder housing in a reciprocating...
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6830439 |
Electric fuel pump with universal relief valve installed in the pump inlet
A universal relief valve assembly ( 30 ) installed in an electric fuel pump ( 10 ) for returning fuel from an outlet portion ( 16 ) of the fuel pump back to the inlet side of the pump. A cartridge...
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6823686 |
Pressure equalization system and method
A pressure equalization method and system is provided for starting a compressor while maintaining the condenser at a high pressure and includes a valve and a bleed port. The compressor has a...
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6821092 |
Capacity modulated scroll compressor
A scroll compressor has a biasing chamber which contains a pressurized fluid. The pressurized fluid within the chamber biases the two scroll members together. A valve assembly is in communication...
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6817839 |
Device for delivering moist gases
A multistage device ( 1 ) for delivering moist gases is provided. Said device comprises several delivery pumps ( 2, 3 ) each of which having a displacer that oscillates inside a delivery space, and...
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6817843 |
Ball check air vent for transmission pump
A pressure-relieving valve is connected to relieve air pressure from an internal diameter of a transmission pump. On startup, pressurized oil is delivered to the torque converter. At engine idle...
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6814552 |
Pump capable of releasing excessive air
A pump capable of releasing excessive air is shown to include a hollow base, a cylinder installed on and communicated with the hollow base, a piston movably received in the cylinder, a piston tube...
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