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| Number | Title | Issue Date |
| 7347673 | Fluid machine served as expansion device and compression device A fluid machine is served as an expansion device and a compression device. The fluid machine compresses gas in an operation chamber upon functioning as the compression device. The fluid machine expands the gas in the operation chamber upon functioning as the expansi... | 03/25/2008 |
| 7331767 | Method of stepless capacity control of a reciprocating piston compressor and piston compressor with such control For stepless capacity control of a reciprocating piston compressor, an unloader (2) arranged on a suction valve (1) keeps open said suction valve (1) over a thereby controllable portion of the working cycle of the compressor by means of an unloa... | 02/19/2008 |
| 7290561 | Pulsation causing valve for a plural piston pump A valve for causing pulsatile flow in a multi-piston plunger pump includes a valve poppet, a valve seat, and a spring biasing the valve poppet against the valve seat; and a mechanism holding the valve poppet in an open position, thereby producing pulsatile flow from... | 11/06/2007 |
| 7278443 | Pulsation causing valve for a plural piston pump A valve for causing pulsatile flow in a multi-piston plunger pump includes a valve poppet, a valve seat, and a spring biasing the valve poppet against the valve seat; and a mechanism holding the valve poppet in an open position, thereby producing pulsatile flow from... | 10/09/2007 |
| 7251947 | Refrigerant system with suction line restrictor for capacity correction A fixed restriction is placed in a suction line leading to a compressor. The size of the restriction is selected to achieve a desired capacity reduction (correction) for the refrigerant system compressor. By selectively restricting the flow of refrigerant through th... | 08/07/2007 |
| 7207786 | Fuel pump with filter-absent safety valve and universal inlet and outlet Fuel pump assembly 10 includes a filter 42 that rests on ledge 48, between the pump housing 22 and inlet cap 56. Filter detector 50 has a valve engager 62 for opening the check valve 58 and bearing feet 52 | 04/24/2007 |
| 7156625 | Fuel pump with filter-absent safety valve and universal inlet and outlet Fuel pump 10 includes a filter 42 that rests on ledge 48, between the pump housing 12 and inlet cap 56. Filter detector 50 has a valve engager stem 62 for opening the check valve 58 and bearing feet 52 t... | 01/02/2007 |
| 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 unloader valve has an unactuated condition and an actuated condition disa... | 11/21/2006 |
| 7114928 | High-pressure fuel pump and assembly structure of high-pressure pump A high pressure pump for decreasing an initial axial force of a clamping bolt and preventing distortion of a sealing surface and a cylinder form. The high pressure pump has an intermediate member including a cylinder body. The cylinder body has a pressurizing chambe... | 10/03/2006 |
| 6981852 | Strainer and valve release A combined strainer and valve release structure formed as a unitary part of polyethylene with the strainer having a perforated wall and the valve release having a pushrod located on one side of the wall and an actuator tab located on the other side of the wall, with... | 01/03/2006 |
| 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 and redistributing a portion of the load during the high pressure appli... | 12/06/2005 |
| 6926175 | Constant discharge structure for nozzle head lowering type vacuum cosmetic container Disclosed is a constant discharge structure for a nozzle head lowering type vacuum cosmetics container for containing high functional cosmetics. The constant discharge structure includes a liquid collecting chamber having a liquid inflow hole in the lower portion of... | 08/09/2005 |
| 6565336 | Normally unseated suction valve In its unstressed state, a suction valve is spaced from its valve seat such that the suction valve must be deformed against its inherent spring force in order to achieve seating. The spring force due to deformation provides an opening bias to the suction ... | 05/20/2003 |
| 6371741 | Manual air pump having at least two selectable inflation modes A manual air pump includes an outer cylinder having a first chamber and a head provided to the second end of the outer cylinder. The head includes an outlet passage communicated with the first chamber for supplying air to an object to be inflated. An inne... | 04/16/2002 |
| 5833209 | Device and method for influencing the periodic stroke movement of the closing element of a valve To influence the periodic stroke movement of the closing element of a valve, a control cylinder working on the closing element in the stroke direction is provided, which can be acted upon or released by a control element periodically with pressure medium.... | 11/10/1998 |
| 5813841 | Hydraulic pressure control system for a pump A positive displacement pump assembly which has an hydraulically controlled intake check valve that is controlled by a three-way solenoid control valve. The intake valve contains a one-way check valve that opens when the pump piston is on an intake stroke... | 09/29/1998 |
| 5695325 | Synchronized unloader system and method for a gas compressor An unloader system is provided for a gas compressor including a cylinder, a piston reciprocably mounted in the cylinder, a crankshaft connected to the piston and suction and discharge valve assemblies, selectively communicating the cylinder with suction a... | 12/09/1997 |
| 5642753 | Valve unloader assembly A plate mounted to a reciprocable shaft has a plurality of straight fingers (a) coupled thereto and (b) extending perpendicularly therefrom, and each of the fingers is separately detachable from the plate to simplify and facilitate maintenance and repair.... | 07/01/1997 |
| 5518377 | Vertical metering pump having piston biasing elastomeric gasket A miniature metering pump of the type possessing a body provided with an inlet opening out into a metering chamber, associated with an inlet valve having a valve member, and with a piston having a plunger provided with an axial nozzle and flared at its bo... | 05/21/1996 |
| 5374167 | Feed pump for a hydraulic system A feed pump for a hydraulic system that is equipped with at least one outlet valve whose valve-closing body is loaded by a valve spring. The valve-closing body is held at a distance form its valve seat by means of a gas-filled hollow-body ring so that the... | 12/20/1994 |
| 5338160 | Individual controllable cylinder-plunger assemblies of a radial piston pump A radial piston pump includes a plurality of radially arranged cylinder-pger assemblies having suction valves and pressure-regulating valves, with the plungers being controlled by an eccentric disk which eccentrically circulates relative to a housing acc... | 08/16/1994 |
| 5331998 | Radial valve with unloader assembly for gas compressor A suction valve for a gas compressor includes a cylindrical valve guide cage with plurality of rows of valve guides, each with a corresponding poppet valve slidably movable therein. Each valve guide communicates with a compressor cylinder. A concentric cy... | 07/26/1994 |
| 5306122 | Diaphragm pump construction A diaphragm pump with a flat diaphragm which is held between the face surface of a pump head and the corresponding face surface of a hydraulic block is improved in that the annular clamping region has an angling step such that the clamped-in diaphragm is ... | 04/26/1994 |
| 5282738 | Liquid fuel feeding method and liquid fuel burning apparatus The liquid fuel burning apparatus includes a fuel tank, a burning unit for burning the fuel, an electromagnetic pump for sucking the fuel from the tank, a feeding pipe for feeding the sucked fuel to the burning unit, and a control unit for controlling the... | 02/01/1994 |
| 5277553 | Valve-controlled displacer unit having valve triggering The invention relates to a valve-controlled positive displacement pump having valve triggering, which permits the forced opening or keeping open of an inlet valve, operating in the manner of a non-return valve, of a displacer working space, so that the di... | 01/11/1994 |
| 5192198 | Diaphragm pump construction A diaphragm pump with a flat diaphragm which is held between the face surface of a pump head and the corresponding face surface of a hydraulic block is improved in that the annular clamping region has an angling step such that the clamped-in diaphragm is ... | 03/09/1993 |
| 5154589 | Metering pump A metering pump wherein the head is provided with internal threads terminating adjacent to internal shoulders at each of the pump cylinder, inlet valve and outlet valve ports. The cylinder, inlet valve and outlet valve each include a flange secured to the... | 10/13/1992 |
| 4991747 | Sealing pump A reciprocating pump for dispensing liquids from a container comprises a hollow body in which is slidably fitted a hollow piston. A piston seat is located in the body and provides a segment sized for sealing fit inside the hollow piston, thereby minimizin... | 02/12/1991 |
| 4527959 | Drilling fluid pump providing a uniform, controlled pressure and flow rate A pump is provided for circulating drilling fluid and the like into a well during a well drilling process. The pump comprises a pair of double-ended piston assemblies hydraulically reciprocated in opposite directions by a common hydraulic drive arrangemen... | 07/09/1985 |
| 4338066 | Grease gun A grease gun is fed from a constant supply under pressure. The gun has a hand-pumped lever for delivering shots of grease either at high pressure and low volume or low pressure and high volume depending on a changeover valve. Air bleeds from the gun throu... | 07/06/1982 |
| 4230160 | Adjustable suck-back device for sanitary pumps A suck-back arrangement for a sanitary filling unit in which a threaded adjusting member adapted to be selectively moved into and out of the path of the valve member of the outlet valve assembly is in threaded engagement only with a support member dispose... | 10/28/1980 |
| 4080107 | Bellows pump and pumping plant for oil-filled electric cables A pump for pumping insulating oil for oil-filled electric cables in which a driven piston is within and spaced from a tubular bellows which is surrounded by an enclosure. The bellows forms a chamber with the enclosure which contains the cable oil, and the... | 03/21/1978 |
| 4008011 | Piston compressor A piston compressor, in which an electromagnet coil is mounted on the outer side of the cylinder block cover and is used to actuate the suction valves of the cylinder block. The electromagnet coil is connected to each suction valve of the cylinder block t... | 02/15/1977 |
