Patents in subclass Pumps/Adjustable Spring Loaded Valve
Parent class: Pumps
| Number | Patent title | Issue Date |
|---|---|---|
| 07399167 | Fluid machine operable in both pump mode and motor mode and waste heat recovering system having the same A check valve is provided to each discharge port, which communicates between a corresponding working chamber and a high pressure chamber in an integrated compressor/expander apparatus. A valve mechanism, which is opened in a motor mode,... |
07/15/2008 |
| 06863504 | 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 relief valve cavity formed in the pump... |
03/08/2005 |
| 6672845 | Apparatus for preventing vacuum compression of scroll compressor An apparatus for preventing vacuum compression of a scroll compressor comprising: a suction tube and a discharge tube each combined to one side of a closed container filled with oil to an adequate height; a fixing scroll having a wrap and... |
01/06/2004 |
| 06672845 | Apparatus for preventing vacuum compression of scroll compressor An apparatus for preventing vacuum compression of a scroll compressor comprising: a suction tube and a discharge tube each combined to one side of a closed container filled with oil to an adequate height; a fixing scroll having a wrap and... |
01/06/2004 |
| 06494331 | Sampler To sample liquids containing volatile materials, the liquid is pumped through a syringe needle into a container until the container overflows. The needle is removed slowly and the container is automatically closed as the needle is... |
12/17/2002 |
| 06171071 | Water pump having water cooling device A water pump includes a housing having a water inlet, a water outlet, an exit and a mouth. A circulating water passage couples the exit to the mouth of the housing. A pump may pump water from the exit to the mouth of the housing via the... |
01/09/2001 |
| 6059547 | Cylinder injection high-pressure fuel pump A cylinder injection high-pressure fuel pump permits reduction in size and cost thereof and it is also capable of securely absorbing high-frequency pulsations. The cylinder injection high-pressure fuel pump (200) has: a casing (1) in... |
05/09/2000 |
| 6053712 | Cylinder injection high-pressure fuel pump A cylinder injection high-pressure fuel pump prevents the pulsations of fuel generated by a high-pressure fuel pump from spreading to a low-pressure pipe connected to a low pressure end. The cylinder injection high-pressure fuel pump has:... |
04/25/2000 |
| 5984645 | Compressor with combined pressure sensor and high pressure relief valve assembly A combined compressor pressure sensor and excess pressure relief valve (12) uses a formed disk (22) that snaps down and back up at a pair of predetermined pressures. The disk (22), when it snaps down, opens a plug (34) to in turn allow... |
11/16/1999 |
| 5919033 | Pump having relief valve seat free of direct structural restraint A pump includes a coaxially integrated pump bypass/relief valve element of high density polymer material seats against a hard metallic sleeve that is pressed into a first counterbore around the bypass flow channel with an interference... |
07/06/1999 |
| 5846060 | Reciprocating piston pump with bleed passages A pump which has a piston (30) which is reciprocatingly moved vertically inside a tubular housing (32) to extract fluid from the bottom of a well (29). The piston (30) is attached to a motor (12) for driving it and has a horizontally... |
12/08/1998 |
| 5800136 | Pump with bypass valve A pump includes a housing having at least a first pumping chamber, an inlet, an inlet passage leading from the inlet to the pumping chamber, an outlet and an outlet passage leading from the pumping chamber to the outlet. A first pumping... |
09/01/1998 |
| 5651665 | Adjustable relief valve arrangement for a motor vehicle power steering hydraulic pump system A hydraulic pump having a flow control valve for recirculating a fraction of the discharge of a rotating group of the pump and an externally adjustable pressure relief valve. The flow control valve includes a cylindrical bore in a housing... |
07/29/1997 |