Famous Patents
In 1879, Auguste Bartholdi received design patent number 11,023 titled "Design for a Statue". It was for the Statue of Liberty.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7374406 | System and method for reducing noise in multi-capacity compressors A method and system is provided for reducing chatter in multi-capacity compressors having disengageable eccentric structures. The multi-capacity fluid compressor includes a compression chamber having a discharge end and an inner surface. The compressor also includes... | 05/20/2008 |
| 7335004 | Apparatus for varying capacity in scroll compressor An apparatus for varying the capacity in a scroll compressor, the apparatus having an orbiting scroll provided with a wrap filling portion which is stepped at a certain height, extending the entire inside of a wrap from an outer end portion of the wrap; a fixed scro... | 02/26/2008 |
| 7217110 | Compact rotary compressor with carbon dioxide as working fluid A rotary compressor for compressing a working fluid includes a housing having an oil sump. A stationary shaft extends into the housing and includes a longitudinal passage. The longitudinal passage has an oil inlet in fluid communication with the oil sump. A working ... | 05/15/2007 |
| 7207785 | Vane pump wear sensor for predicted failure mode A vane pump is disclosed for use with gas turbine engines that is adapted and configured to provide a failure mode similar to that of a traditional gear pump. The vane pump includes a pump housing, a cam member, a cylindrical rotor member and a mechanism for communi... | 04/24/2007 |
| 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, between the latter and the top of the piston (2), a... | 01/03/2006 |
| 6973971 | Down hole well cleaning apparatus An apparatus and a method for cleaning the open perforations in a well and for bailing a well. The apparatus has a tubular conduit with at least one seal attached to it that forms a seal between the well casing and the exterior of the conduit. The seal is held in pl... | 12/13/2005 |
| 6964558 | Compressor utilizing low volt power tapped from high volt power Low voltage electrical power is supplied to a diagnostic control device in a sealed compressor. Electrical power is tapped from a high voltage power line and transformed to low voltage power that in turn operates the diagnostic control device. The diagnostic control... | 11/15/2005 |
| 6945755 | Fluid controlled pumping system and method A fluid level controlled pumping system includes a pumping unit disposed within a fluid cavity. The pumping unit includes an inlet operable to receive a fluid to be pumped from the fluid cavity. The system also includes a valve slidably coupled to the pumping unit. ... | 09/20/2005 |
| 6676389 | Piston pump for increasing pressure, comprising a transfer piston and a pressure-control piston The invention relates to a piston pump for increasing pressure for liquids, in particular for the camshaft phase adjustment of reciprocating internal combustion engines, said piston pump advantageously being integrated into the housing of the cylinder hea... | 01/13/2004 |
| 6663357 | Vane pump wear sensor for predicted failure mode A vane pump is disclosed for use with gas turbine engines adapted and configured to provide a failure mode similar to that of a traditional gear pump. The vane pump includes a pump housing, a cam member, a cylindrical rotor member and a mechanism for comm... | 12/16/2003 |
| 6582203 | Radial piston pump The invention is based on a radial piston pump (1) with a pump body (2), in which pump body (2) are placed pistons (4), and cylinders (5) arrayed radial to a cam (14) and the pistons (4) upon an inward thrust suck in fluid by means of suction side intakes... | 06/24/2003 |
| 6568916 | Axial piston pump with outer diameter inlet filling A variable delivery fixed displacement pump is provided which has a rotating drive plate with a fixed angle. The drive plate has a fill passage extending between its radial outer surface and its drive surface, which allows fluid to be supplied to a fluid ... | 05/27/2003 |
| 6561771 | Axial piston pump with center inlet fill An axial piston pump with center inlet fill utilizes a hydrostatic thrust bearing and a hydrodynamic journal bearing to support a rotating wobble type drive plate connected to a drive shaft. The rotation of the drive plate causes a plurality of parallel p... | 05/13/2003 |
| 6537040 | Radial piston pump The invention is based on a radial piston pump (1) with a pump body (2), in which pump body (2) are placed pistons (4), and cylinders (5) arrayed radial to a cam (14) and the pistons (4) upon an inward thrust suck in fluid by means of suction side intakes... | 03/25/2003 |
| 6497556 | Fluid level control for a downhole well pumping system A fluid level controlled pumping system includes a pumping unit disposed within a fluid cavity. The pumping unit includes an inlet operable to receive a fluid to be pumped from the fluid cavity. The system also includes a valve slidably coupled to the pum... | 12/24/2002 |
| 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 extending base plate ... | 12/08/1998 |
| 5716201 | Variable displacement vane pump with vane tip relief A variable displacement vane pump having a vaned rotor adjustably contained within a cam member for rotation between fuel inlet and fuel discharge arcs. Adjacent vanes form enclosed fuel bucket areas which are expanded and axially-supplied with fuel in th... | 02/10/1998 |
| 5573381 | Internally regulated self priming fuel pump assembly A dual-piston fuel pump assembly includes a housing having an inlet to a primary chamber and an outlet from a pumping chamber. Between the primary and pumping chambers are interposed concentric inner and outer pistons. Each piston is independently spring ... | 11/12/1996 |
| 5525045 | Reciprocating compressor A compressor includes a reciprocating piston mounted in a cylinder for sucking-in refrigerant gas during a retraction stroke and then compressing and discharging the gas during a compression stroke. A front wall of the piston includes a through-hole, and ... | 06/11/1996 |
| 5380169 | Suction-controlled ring gear pump In a suction-controlled ring gear pump a continuous elimination of the vacuum occurring in the displacement cells of the pump at higher speed is achieved by a long distance of the displacement cells from the end of the suction region to the start of the o... | 01/10/1995 |
| 5358389 | Two-stage compression vacuum pump having valved piston and power limiting valve This invention relates to a vacuum pump. The pump includes a pump housing (10) having upper and lower cylindrical, partly liquid filled, compression chambers (11 and 12 respectively) which are separated from each other and in which an upper and a lower pa... | 10/25/1994 |
| 5354181 | Hydraulic piston pumps equipped with suction valve Hydraulic piston pump driven in an alternating reciprocating motion by bearing, through a stud, against a cam carried by a drive shaft, characterized by the fact that a device acting as non-return feed valve is incorporated in each piston (14) while the d... | 10/11/1994 |
| 4493188 | Drive transmission means This invention provides apparatus for use in a drive transmission system comprising a pump adapted to perform work on a medium and means repetitively and automatically to unload the pump. When connected with a flywheel driven by a prime mover an embodimen... | 01/15/1985 |
| 4326868 | Refrigeration system utilizing a gaseous refrigerant bypass The present invention provides a refrigeration or heating system which includes a high pressure gaseous refrigerant bypass which introduces high pressure gaseous refrigerant to the compressor through a hole therein. This reintroduction of high pressure ga... | 04/27/1982 |
| 4120614 | Hand bicycle pump with pressure preselection and display means A hand bicycle pump of generally cylindrical configuration essentially comprising a pump body adapted to be reciprocated on a pump rod. An air circulation chamber communicates at one end through the compression piston with the compression chamber in the p... | 10/17/1978 |
| 4119392 | Screw compressor with axially displaceable motor The invention deals with a screw compressor with housing, such housing containing a working chamber with two parallel cylindrical intersecting bore holes. The working chamber is bordered by two even end walls vertical with the longitudinal axes of the bor... | 10/10/1978 |
| 4060342 | Vane assembly for rotary compressor A vane assembly for a rotary compressor is provided having a shoe for sliding against a relatively moving surface and carried on a blade edge in a cylindrical pivot type joint. The shoe is generally channel-shaped in transverse cross-section and has openi... | 11/29/1977 |
| 3951569 | Air conditioning compressor A piston type compressor for use with an automotive air conditioning system with the capabilities of successfully operating over a wide range of ambient temperatures including apparatus to automatically modify the compressor displacement in response to op... | 04/20/1976 |
