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| Number | Title | Issue Date |
| 8117960 | Water-cooled piston compressor A water-cooled piston compressor having at least one air-compressing piston, which can be driven with means for producing a linearly oscillating drive force and which is accommodated in an axially movable manner in a cylinder housing which is closed at the end face ... | 02/21/2012 |
| 7219594 | Coolant system for piston and liner of reciprocating pumps A reciprocating pump assembly includes piston rod that is movable and reciprocates in order to pump a fluid. The piston rod has a piston portion at an end that stokes within a piston chamber. The pump assembly also includes a piston rod sleeve that houses the piston... | 05/22/2007 |
| 7073427 | Hydrostatic machine with compensated sleeves A hydrostatic machine with a cylinder block (6), within which sleeve holes (28b) are arranged, in which sleeves (28) sit, surrounding piston bores (28a) in which pistons (29) are mounted, such as to be displaced back ... | 07/11/2006 |
| 7032809 | Seam-welded metal pipe and method of making the same without seam anneal An apparatus and method for making a seam-welded steel pipe free of untempered martensite without seam anneal. The method includes selecting a steel containing a carbon concentration below a predetermined level, for example, 0.14% or 0.12% by weight. The method also... | 04/25/2006 |
| 7028473 | Hot-gas engine The hot-gas engine comprises a cylinder, a working piston which together with a cylinder cover delimits a cylinder space designed to accommodate a working medium, a displacement piston which divides the cylinder space into a first and a second working space, as well... | 04/18/2006 |
| 7000584 | Thermally insulated cylinder liner An engine is provided with a plurality of cylinders and cylinder liners that are shaped to define a plurality of spaces between the liners and the engine block. These spaces provided an insulative barrier that at least partially restricts the flow of heat from the l... | 02/21/2006 |
| 6863508 | Measuring gas pump with heated and insulated pump head A pump for gases to be measured having a pump housing in which a pump chamber is located. The pump chamber is sealed off by a working membrane that is connected to a crank drive by a connecting rod or similar lifting mechanism. A heating device is provided in an upp... | 03/08/2005 |
| 6553893 | Piston assembly for reducing the temperature of a compressor cup seal A piston assembly for a compressor that reduces the temperature experienced by a compressor cup seal during operation of the compressor. The piston assembly includes a piston sleeve having a top portion and an interior. A valve plate is supported by the t... | 04/29/2003 |
| 6386833 | Air compressor assembly with dual cooling fans An apparatus includes a motor with an output shaft. A solitary air compressor is linked to the output shaft so as to be driven by the output shaft. The compressor contains a piston in a cylinder. A first fan is mounted on the output shaft to direct coolin... | 05/14/2002 |
| 6186515 | Air-cooled hydraulic chuck actuator A chuck actuator has a cylinder housing rotatable about a main axis and forming a chamber, a piston axially subdividing the chamber into a pair of compartments and axially displaceable in the chamber, and a stem centered on the axis, extending from the ho... | 02/13/2001 |
| 6145311 | Pneumo-hydraulic converter for energy storage In order to maintain high efficiency close, to isothermy despite high frequencies in a pneumo-hydraulic converter with reciprocating pistons, pipe cluster-heat exchange pipes (38) are provided in the gas working chambers of the converter and the exchange ... | 11/14/2000 |
| 5971717 | Axial piston machine having a cooling circuit for the cylinders and pistons An axial piston machine having a housing (1) the interior housing chamber of which includes a leakage chamber (37) and accommodates a stroke disc (3) and a rotatably mounted cylinder drum (6) having cylinders (26, 28) and pistons (29) reciprocally movable... | 10/26/1999 |
| 5916349 | Piston assembly and method for reducing the temperature of a compressor cup seal A piston assembly comprising a piston sleeve having an interior wall, a piston carried in the piston sleeve, a cup seal carried by the piston which engages the interior wall of the piston sleeve, and a valve plate matingly adapted to receive the piston sl... | 06/29/1999 |
| 5860800 | Compressor cylinder head having a partition A compressor with a cylinder head (33, 29) comprises a lower cylinder head section (33) and an upper cylinder head section (29) connected to each other. A seal (12) is provided between the faces of the lower cylinder head section (33) and the upper cylind... | 01/19/1999 |
| 5823598 | Hidden storage for vehicles A hidden storage is for vehicles such as vans and utility/sports utility vehicles without altering the external appearance of the vehicle. The hidden storage is located adjacent one or both sides of the vehicle between a rearmost side door and the rear of... | 10/20/1998 |
| 5775885 | Combination suction manifold and cylinder block for a reciprocating compressor A hermetically sealed reciprocating refrigeration compressor has a suction gas arrangement including a suction gas plenum formed integral with a cylinder block for supplying suction gas directly to a cylinder so as to eliminate the need for external sucti... | 07/07/1998 |
| 5533879 | Manual driven valved piston reciprocating liquid pump A liquid pump comprises an insulated cylinder which is provided with a top seat and a bottom seat. The top seat is provided with a liquid inlet while the bottom seat is provided with a liquid outlet. A piston rod is fastened with the top seat and is provi... | 07/09/1996 |
| 5501299 | Process and apparatus for preventing corrosion of a hydraulic elevator cylinder The surface of a hydraulic cylinder is enclosed with a cylindrical casing. A fluid, preferably a thixotropic dielectric hydrophobic fluid which retains a gel structure when static, has a specific gravity greater than water and inhibits bacteriogenic and a... | 03/26/1996 |
| 5327812 | Fluid-powered actuator and method of attaching mounting plates A fluid-powered actuator having a body with a shaft adapted for coupling to an external device to provide rotational drive thereto. A piston sleeve is mounted for reciprocal longitudinal movement within the body to provide rotational drive to the shaft. A... | 07/12/1994 |
| 5148678 | Exhaust gas flow control valve for internal combustion engine An exhaust gas flow control valve for an internal combustion engine comprises a body, a diaphragm actuator and a bracket. The body is equipped with an exhaust passage and a valve member arranged in the exhaust passage. The bracket is equipped with an actu... | 09/22/1992 |
| 4930406 | Refrigerant gas compressor construction A refrigerant compressor construction including one or more cylinders and pistons and a cylinder head mounted over the end of the cylinders, the head having a base, a first wall providing a suction chamber and a second wall providing a discharge chamber, ... | 06/05/1990 |
| 4831828 | Cryogenic refrigerator having a convection system to cool a hermetic compressor In accordance with the invention, a hermetic refrigerant compressor pump which is used to compress helium is cooled by fins which are press fitted to the compressor's housing. The compressor is further cooled by a heat exchanger which cools oil in an oil ... | 05/23/1989 |
| 4818192 | Reciprocating pump The invention concerns a reciprocating pump whose plunger (10) is connected with a plunger rod (12) that runs in a stuffing box (13) coordinated with the pump cylinder (9) cap and is reciprocated hydraulically, where the cylindrical walls of the pump cyli... | 04/04/1989 |
| 4792289 | Reciprocating pump for cryogenic fluids In a reciprocating pump for cryogenic fluids comprising a pump cylinder in which a piston is oscillatingly displaceable in a sealed state, an inlet valve and an outlet valve, and an annular channel surrounding the pump cylinder on the outer side and formi... | 12/20/1988 |
| 4712381 | Fluid handling elements and combustion engines A cylinder in a fluid handling device in which high pressures and temperature vary in a periodic cycle. An outer chamber surrounding the cylinder in which a pressurized fluid is used to equalize the pressure inside and outside the cylinder wall to prevent... | 12/15/1987 |
| 4701114 | Compressor suction gas heat shield A combination heat shield/gasket is disposed between abutting components in a reciprocating compressor. The heat shield/gasket includes strategically located protuberances, at locations where the components do not directly abut, the tips of which contact ... | 10/20/1987 |
| 4651526 | Hydrostatic drive specially for mixing drums of ready-mixed concrete vehicles A transmission casing wherein is inserted a flooded hydromotor has together with an annular space traversed by a forced flow a double function both as oil cooler and as receiver container of the externally situated pumps. Both the working substance flowin... | 03/24/1987 |
| 4536132 | Gas compressor A gas compressor drivably connected to an engine operates to supply compressed gas to a tank. The compressor has a housing including a commercial air cooled internal combustion engine block and cooling air system having a single cylinder chamber accommoda... | 08/20/1985 |
| 4529365 | Compressor with longitudinally extending cooling fins An oil-less gas compressor comprises at least one cylinder block mounted on a crankcase, the outer end of the cylinder block being closed by a cylinder head. A piston in the cylinder block bore is reciprocated by a motor-driven crankshaft in the crankcase... | 07/16/1985 |
| 4523632 | Cooling system of rotary fluid pressure cylinder for chucking in machine tools This invention relates to a cooling mechanism of a rotary hydraulic cylinder for chucking operation of machine tools. In a rotary hydraulic cylinder which consist of a rotor member having a reciprocable piston inside and in which working oil is fed to the... | 06/18/1985 |
| 4480532 | Fossil fuel combustion-steam engines and elements for fluid handling devices External chambers are applied around the working cylinder of an engine to permit high temperature for mechanically weak materials for the very hot parts of the engine, when the external chambers are filled with plural different pressures substantially equ... | 11/06/1984 |
| 4466399 | Piston-cylinder set for reciprocating internal-combustion engines, especially Otto and diesel engines To avoid the necessity of piston rings in a piston-cylinder set, it is prsed that the cylinder liner be surrounded by a band consisting of a fiber composite whose thermal expansion in a radial direction is less than that of the cylinder liner, the impedi... | 08/21/1984 |
| 4431172 | Device for absorbing punching shock in a press A shock absorbing device in a press is formed by having a telescopically sliding member fastened to the punch plate of the press and a stopper member fastened to the die plate of the press and placing an oil of high viscosity between the post and the oute... | 02/14/1984 |
| 4396362 | Cryogenic reciprocating pump The cryogenic reciprocating pump includes a pump body having a cylindrical pumping chamber extending from the forward end of the pump body to the pump body rearward end. A piston is reciprocated in the pumping chamber under the control of a piston rod ext... | 08/02/1983 |
| 4393752 | Piston compressor The piston compressor has a cylindrical block with at least one cylinder lining in which a piston moves without making contact. A collecting chamber for leakage gases which escape along the piston is provided at an end of the cylinder liner remote from th... | 07/19/1983 |
| 4319516 | Fan-cooled actuator for power chuck A power-chuck actuator has an actuator body forming an axially throughgoing passage and formed centered on this axis with an annular piston displaceable axially forwardly and backwardly and having a collar projecting from the front of the actuator. This c... | 03/16/1982 |
| 4257314 | Apparatus for improved motion control An improved type of hydraulic control cartridge with mounting structure and accessorial safety device for installation within both ends of reciprocative pneumatic actuators to permit a safe increase in their speed of operation. The safety device automatic... | 03/24/1981 |
| 4250953 | Piston sealing Ceramic coatings prevent metal to metal contact between double acting pistons and cylinders. Cylinders and pistons operate in true cylindrical form. Ceramic coated cylinders are gradually brought to operating temperatures while temporary cutting pistons s... | 02/17/1981 |
| 4242878 | Isothermal compressor apparatus and method An isothermal compressor apparatus and method, the apparatus including a compression chamber, a piston operable in the compression chamber and an evaporation chamber disposed in heat exchange relationship with the compression chamber, the evaporation cham... | 01/06/1981 |
| 4174616 | Insulated cylinder sleeve for a hot-gas engine A hot-gas engine having a heat insulating lining of loose grains surrounding the hot working medium spaces of the cylinder and the regenerator housing.... | 11/20/1979 |
