Did You Know...
...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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 |
| 7740455 | Pumping system with hydraulic pump A system for pumping liquid having a first reservoir at a first elevation, which stores a first liquid, a second reservoir at a second elevation, where the second elevation is substantially lower than the first elevation, the second reservoir stores a second liquid,... | 06/22/2010 |
| 7726950 | Fluid supply unit having an integral pressure generator and pressure booster A fluid supply unit includes a hydraulic supply unit and a pressure generator for the fluid and a pressure outlet. A pressure booster is installed between the pressure generator and the pressure outlet and is rigidly mechanically connected with the pressure generato... | 06/01/2010 |
| 7597545 | Amplifier assembly The invention concerns a pressure amplifier that includes a low pressure inlet for supplying a medium at low pressure, a low pressure piston with a first operational area and at least one high pressure piston with a second operational area, the second area being sma... | 10/06/2009 |
| 7364409 | Piston assembly for rotary hydraulic machines A piston assembly for a hydraulic machine is formed with a part spherical cavity in the piston to receive a spherical bearing of a slipper assembly. The spherical bearing is secured in the cavity by swaging the walls of the piston and subsequently working the wall t... | 04/29/2008 |
| 7354252 | Pressure intensifier A pressure intensifier for fluids has an intensifier piston with a high-pressure piston and a low-pressure piston having a greater diameter than the high-pressure piston. The pistons are moveable in a high-pressure cylinder and a low-pressure cylinder, respectively,... | 04/08/2008 |
| 7175395 | Pressure enhancer value system A system to intensify pressure supplied by a conventional pump where a piston assembly having two piston members at opposite ends is positioned in a pressure cylinder. The laterally outer subchambers are defined by the piston members and the cylinder and are adapted... | 02/13/2007 |
| 7152679 | Downhole tool for deforming an object A downhole tool comprises a body defining a fluid chamber, a fluid outlet for directing fluid outwardly of the chamber, and an arrangement for producing a rapid reduction in the volume of the chamber, such that fluid in the chamber is displaced rapidly through the o... | 12/26/2006 |
| 7118352 | Hydraulic metering device The metering device for a liquid medium comprises a cylinder and a piston operatively disposed therein to define a metering chamber ahead of the piston. The outlet end of the cylinder is open and closed by an evacuation valve. The piston is driven forwardly through ... | 10/10/2006 |
| 7086225 | Control valve supply for rotary hydraulic machine A variable capacity hydraulic machine has a rotating group located within a casing and a control housing secured to the casing to extend across and seal an opening in the casing. The control housing accommodates a control circuit and a pair of sensors to sense chang... | 08/08/2006 |
| 6935850 | Axially aligned dual piston cylinder air pump with a common head portion A dual-direction pump includes two cylinders arranged on opposite sides of a head portion and an inlet return-flow prevention device and a leakproof device mounted between the cylinder and the head portion for avoiding leakage at the juncture between the cylinder an... | 08/30/2005 |
| 6912849 | Cylinder driving system and energy regenerating method thereof A cylinder driving system capable of reducing the number of hydraulic devices and the amount of energy loss and an energy regenerating method thereof are provided. To this end, the system includes i) a hydraulic cylinder, ii) a hydraulic pump having three suction/di... | 07/05/2005 |
| 6887045 | Hydraulic transformer A hydraulic transformer wherein a multiplicity of displacers are guided in a displacement member. The stroke of the displacers is determined through the intermediary of a cam element, with pressure medium supply and discharge being controlled through the intermediar... | 05/03/2005 |
| 6866485 | Double-acting hydraulic pressure intensifier A double-acting hydraulic pressure intensifier includes a supply connection, a return connection, a high-pressure connection. An intensifier piston assembly includes a low-pressure piston arranged in a low-pressure cylinder and two high-pressure pistons connected to... | 03/15/2005 |
| 6769449 | Water booster methods and apparatus Water is first caused to flow through a first passage and rotate a first impeller. Rotation of the first impeller is linked to rotation of a second impeller, which is in fluid communication with a second, discrete passage. Vanes on the second impeller are constraine... | 08/03/2004 |
| 6736611 | Aircraft fluid delivery device An aircraft fluid delivery device (10) including a piston assembly (20), a pilot assembly (22), and a control assembly (24). The control assembly (24) includes non-contact proximity sensors (S1, S2) that sense the pos... | 05/18/2004 |
| 6491813 | Equipment for desalination of water by reverse osmosis with energy recovery The equipment for desalination of water by reverse osmosis comprises: a pump 1 for drawing the water to be salinated, a high pressure pump 25, a cylindrical block 8 housing two pistons 3, 4 connected to one another by a shaft 5 and disposed, freely slidab... | 12/10/2002 |
| 6447259 | Pressure energy recovery device An energy recovery device includes at least one cylinder, a piston slidable in the cylinder, a first valve for selectively connecting one end of the cylinder to waste liquid at a first relatively high pressure and to drain and a second valve for allowing ... | 09/10/2002 |
| 6390785 | High efficiency booster for automotive and other applications An air booster system (10) for use with a gas turbine to deliver compressed air to a combustion chamber (14) includes a first cylinder (24) with a first piston (52) reciprocal therein and a second cylinder (26) having a second piston (54) reciprocal there... | 05/21/2002 |
| 6328542 | Check valve system A check valve system and method control the opening and closure of a check valve that supplies product fluid to an intensifier pump based on the position of a piston within the intensifier pump. Position sensing allows anticipation of different events alo... | 12/11/2001 |
| 6206041 | Fluid pressure amplifier A fluid pressure amplifier is provided, which includes a pipe for flowing fluid and having an array of holes formed therein through which fluid can flow from within the pipe in use, and resiliently-movable obturator means adjacent the pipe and operatively... | 03/27/2001 |
| 6206649 | Process and apparatus for pressurizing fluid and using them to perform work A fluid pressurization apparatus utilizing a slanted cam disk to oscillate, or to oscillate and rotate a set of piston assemblies arranged in a circle. The motion of the pistons is utilized to pressurize fluid or to perform work. The piston assemblies hav... | 03/27/2001 |
| 6179574 | Apparatus for pressurizing fluids and using them to perform work A fluid transfer apparatus utilizing a slanted cain disk to oscillate and rotate a set of pistons arranged in a circle. Channels associated with the pistons and piston housing effect the transfer of fluid from a first location to a second location, as wel... | 01/30/2001 |
| 6152222 | Hydraulic device to be connected in a pipe string A vibration-generating device for a pipe string includes a hydraulic cylinder barrel, a hydraulic piston, changeover valves, and a double tubular piston rod. Each of the changeover valves is automatically shiftable. Fluid flows through the piston rod, cha... | 11/28/2000 |
| 6116138 | Pressure transformer The invention relates to a pressure transformer for the conversion of a hydraulic power from a first fluid flow having a first pressure into the hydraulic power of a second fluid flow having a second pressure. In the housing (3) a rotor (26) is mounted, a... | 09/12/2000 |
| 5934392 | Pressure converter Pressure amplifier mounted at the lower end of a drill pipe for deep drilling to generate an increased fluid pressure. A piston with a pressure stroke and a return stroke between end positions in a cylinder has a large piston area which during the pressur... | 08/10/1999 |
| 5879137 | Method and apparatus for pressurizing fluids A high-pressure valve assembly having a valve body that defines a preferably cylindrical valve cavity, a fluid inlet, a fluid outlet and a plurality of valve ports; and a fluid pressure intensifier assembly having a plurality of piston-plunger assemblies ... | 03/09/1999 |
| 5632604 | Down hole pressure pump The present invention utilizes a combined dual piston and cylinder arrangement surrounded by a sleeve all mounted within a container which is in turn placed within a drill collar. The pressure of the drilling mud within the drill string drives the pressur... | 05/27/1997 |
| 5588808 | Pump pressure multiplier A device for elevating a pressure acting on a liquid including a liquid pressure elevating mechanism for receiving liquid under a first positive pressure and at a selected volume of liquid per unit of time flow rate from a liquid source at an inlet port a... | 12/31/1996 |
| 5484269 | Fluid intensifier A fluid intensifier (10) includes an unequal-area pump piston (11) and a drive piston (14). The large-area pump piston chamber (21) communicates with the small-area pump piston chamber (29) via a communicating conduit (30) having a check valve (25) therei... | 01/16/1996 |
| 5462414 | Liquid treatment apparatus for providing a flow of pressurized liquid Apparatus for providing a flow of pressurized liquid includes a hydraulic cylinder, a divider within the cylinder interior, and floating piston heads positioned in the cylinder interior on opposite sides of the divider. A double ended ram member is movabl... | 10/31/1995 |
| 5451145 | High pressure fluid pump transformer and method A high pressure fluid pumping transformer apparatus has a cylindrical transformer body surrounded by an outer pressure sleeve defining an annular working fluid chamber substantially surrounding the transformer body which receives fluid from an external so... | 09/19/1995 |
| 5435130 | Vehicle catalyst exhaust system for an internal-combustion engine An internal-combustion engine is provided with an exhaust pipe and an exhaust gas catalyst which can be preheated by a burner. Fuel is fed to this burner from a fuel tank by way of a fuel pump. The pressure of approximately 3 bar existing in a first fuel ... | 07/25/1995 |
| 5399071 | Pressure booster A liquid pressure booster includes a head member with a low-pressure inlet connectable to a liquid source at mains pressure, a high-pressure outlet connectable to the object to be tested, and a central bore, a compound cylinder constituted by a first, upp... | 03/21/1995 |
| 5324173 | High pressure intensifier A hydraulic pressure amplifier has a hydraulic motor for driving a single cam and follower in a piston chamber. A number of conduits and chambers with automatically actuated valves controlling the flow between them are provided, such that, in operation, l... | 06/28/1994 |
| 4895492 | Double acting and automatically reversing pressure intensifier A double acting and at the limit positions automatically reversing pressure intensifier. A case has a first bore hole and a second bore hole. A pressure intensifier piston slides in the first bore hole of the case and subdivides the first bore hole into t... | 01/23/1990 |
| 4844700 | Pressure amplifying pump system A water pressure intensifying system for providing elevated water main pressure from water at a relatively low pressure head, such as may be available from a slowly flowing stream, for example. The basic system comprises two in-line cylinders of different... | 07/04/1989 |
| 4784578 | Metering device The metering device for a liquid medium comprises a cylinder and a piston operatively disposed therein to define a metering chamber ahead of the piston. The outlet end of the cylinder is open and closed by check valve means. The piston is driven forwardly... | 11/15/1988 |
| 4767282 | Fluid pressure booster There is described a fluid pressure booster including a pair of cylinders connected to the opposite sides of a central partition wall of a casing with an inlet port, an outlet port and air exhaust ports, a pair of pistons reciprocable in the cylinders and... | 08/30/1988 |
| 4736879 | Pneumatic tool with pressure intensifier A pressure intensifier is automatically driven repeatedly by compressed air from a compressed air source to produce highly compressed air for storage in a pressure chamber. The pressure chamber is selectively connected to or disconnected from a drive cyli... | 04/12/1988 |
| 4735051 | Double admitting pressure intensifier A double admitting pressure intensifier which automatically reverses at its end positions is provided. The pressure intensifier comprises a pressure intensifier piston and a control slider running parallel to the pressure intensifier piston, each disposed... | 04/05/1988 |
