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| Number | Title | Issue Date |
| 8156856 | Hydraulic cylinder A hydraulic cylinder includes a cylinder having a shaft hole, a piston inserted into the shaft hole so as to have clearance with respect to an inner circumferential surface of the shaft hole, and seal members arranged in annular grooves formed in an inner circumfere... | 04/17/2012 |
| 8037809 | Piston-and-cylinder assembly with a variable diametral clearance, and a cylinder for use in a piston-and-cylinder assembly with a variable diametral clearance A piston-and-cylinder assembly, used in cooling sys terns that may include, for example, refrigerators, air-conditioning systems and the like. In order to solve the problems of volumetric loss (or of cooling capacity) of compressors in general, according to the pres... | 10/18/2011 |
| 7913613 | Piston/cylinder unit A piston/cylinder unit comprising a cylinder, a piston which reciprocates in the axial direction of the cylinder between first and second piston positions, and a fluid bearing provided between the piston and the cylinder which supports the piston such as to be axial... | 03/29/2011 |
| 7900550 | Compression chamber unit and a method for forming such unit The present invention relates to a compression chamber unit (1) of an air pump, comprising a cylindrical body part (3) provided with at least one outlet nozzle (4), a number of connecting flanges (6) and a number of connecting bosses (... | 03/08/2011 |
| 7836817 | Fluid pressure cylinder A pair of recesses is formed on a cylinder hole of a cylinder tube, wherein the recesses are recessed further into the cylinder hole from an inner circumferential surface thereof. Projections that correspond to the recesses are disposed on a head cover and a rod cov... | 11/23/2010 |
| 7654189 | Heavy duty cylinder A cylinder for a piston-cylinder assembly comprises an extruded stainless steel cylinder body and stainless steel end caps mounted to opposite ends of the body. A unique configuration of three seals is used to seal each end cap to the cylinder body. ... | 02/02/2010 |
| 7493849 | Hydraulic cylinder, in particular slave cylinder for a hydraulic clutch actuation system for motor vehicles A hydraulic cylinder has a pressure chamber delimited on one side by a piston accommodated in a longitudinally displaceable manner in a cylinder housing, on the other side by a housing bottom of the cylinder housing, and radially outwards by a circumferential wall o... | 02/24/2009 |
| 7484452 | Fluid end for a plunger pump A fluid end for a reciprocating pump including a body having a base, a side and a longitudinal opposing side, a cylinder bore formed horizontally through the body and a vertical bore intersecting the cylinder bore defining a high stress region proximate the intersec... | 02/03/2009 |
| 7481150 | Fluid cylinder for high temperature applications A fluid cylinder for high temperature applications is disclosed. The fluid cylinder includes an extensible member that moves between a retracted position and an extended position by forcing a fluid, such as a pneumatic fluid or a hydraulic fluid, into the cylinder. ... | 01/27/2009 |
| 7469625 | Hydraulic transmission actuator A hydraulic transmission actuator has a piston/cylinder unit in which an actuating piston longitudinally displaceably arranged in the cylinder housing divides the cylinder chamber into at least two pressure chambers which can be acted upon by hydraulic oil by way of... | 12/30/2008 |
| 7437988 | Piston-cylinder device with position sensing means A pressure activated piston-cylinder device includes a cylinder barrel with a cylinder bore, a piston with a piston rod movably guided in the cylinder bore, and a piston position sensing and indicating device. The piston position sensing and indicating device includ... | 10/21/2008 |
| 7434504 | Cylinder for pressurised fluids A Cylinder for pressurized fluids, such as oil, air or the like, including of a cylindrical nozzle and a pair of heads designed to be attached to the ends of the nozzle, characterized in that two annular grooves are made partly in the cylinder liner and partly in ea... | 10/14/2008 |
| 7430956 | Single-piece air cylinder for a fluid coupling device A single-piece air cylinder (“air cylinder”) for a pneumatic fan drive system. The air cylinder is comprised of a single-piece stamping having a stepped tab portion for attaching to a piston rod of the pneumatic fan drive system. The air cylinder has a cylinder ... | 10/07/2008 |
| 7404353 | Pneumatic cylinder for precision servo type applications A pneumatic cylinder designed to convert compressed air into mechanical output is disclosed. The pneumatic cylinder includes a piston and rod assembly with supporting components coaxially disposed and arranged to achieve a linear mechanical force in accordance with ... | 07/29/2008 |
| 7401544 | Plunger with annular exterior seals and method of installing annular seals on an exterior surface of a plunger A method of installing annular seals on a plunger. A first step involves positioning an annular seal on a seal installation tool adapted to hold the annular seal in an expanded state. A second step involves positioning the annular seal so that the annular seal overl... | 07/22/2008 |
| 7373873 | Low friction, high durability ringless piston and piston sleeve A cylinder liner and ringless piston adapted to be combined therewith in an internal combustion engine are provided that have superior wear resistance, superior scuffing resistance, and superior properties for abating friction loss between the inside surface of the ... | 05/20/2008 |
| 7367238 | Test apparatus using a pneumatic collet and method to clamp a bar A pneumatic collet assembly has a housing, a piston, a collet, and ball bearings. The piston is disposed within the housing. A bore within the piston receives the collet. The collet has a base and fingers. The fingers of the collet define a center channel or bore co... | 05/06/2008 |
| 7367891 | Techniques for controlling transfer of torque using detent members responsive to radial force A torque limiting device includes a base configured to reside in a fixed position relative to a drive unit, an input shaft assembly configured to receive a torque load from the drive unit, and an output shaft assembly which is capable of rotating about an axis. The ... | 05/06/2008 |
| 7350453 | Hydraulic cylinder with rotatable gland A hydraulic cylinder having a gland that is rotatable relative to the cylinder tube, the pivotal connection provided by a pair of aligned annular grooves on the gland and the cylinder tube, a key slot located through the cylinder tube, and a key positionable through... | 04/01/2008 |
| 7347136 | Airless sprayer with hardened cylinder An airless sprayer for paint or the like consists of an electric drive unit connected to a piston. Driven by the electric drive unit, the piston reciprocates within the cylinder, thus spraying the paint or the like. Because of the close tolerance between the piston ... | 03/25/2008 |
| 7322269 | Housing module for a brake booster The present device relates to a housing module 1 for a brake booster. The housing module has a housing shell 3 that accommodates a movable wall 4. The movable wall subdivides an interior space of the brake booster into a low-pressure chamber ... | 01/29/2008 |
| 7316545 | Reducing agent pump for an exhaust-gas aftertreatment system of an internal combustion engine A reducing agent pump has a pump inlet part and a pump outlet part closing off the pump body at its ends. One or both of the inlet and outlet parts is of two-part construction, with a closure element and another element. The two elements are prestressed relative to ... | 01/08/2008 |
| 7293496 | Hydraulic linear drive of a transmission actuator A hydraulic linear drive, in particular for a hydraulic transmission actuator, has a piston/cylinder unit in which an adjusting piston is situated so that it is longitudinally displaceable in a cylinder housing and divides a cylinder space into at least two pressure... | 11/13/2007 |
| 7287458 | Yoke mechanism for compressor A yoke structure for a compressor is disclosed, which is applied to a scotch yoke type reciprocating compressor. The yoke structure comprises a crankshaft (10); a crankpin (20) connected to the crankshaft (10), to rotate along a predetermined ro... | 10/30/2007 |
| 7284526 | Ellipsoid roller bearing piston ring An improved piston ring suitable for use in an internal combustion engine is disclosed comprising a plurality of races sized to receive elongate rollers disposed around the circumference thereof. The elongate rollers may be shaped as a prolate ellipsoid or other rou... | 10/23/2007 |
| 7284961 | Pumping system, replacement kit including piston and/or cylinder, and method for pumping system maintenance A pumping system including a pump is disclosed. The pump includes a replacement piston and a replacement cylinder associated with the replacement piston. The replacement piston has a cross sectional area smaller than a cross sectional area of an original piston of t... | 10/23/2007 |
| 7249938 | Linear compressor Disclosed herein is a linear compressor. In the present invention, the configuration that a sealing protrusion is protruded in a sealing part of a cylinder toward an exhale cover leads line contact with the exhale cover and the sealing protrusion of the sealing part... | 07/31/2007 |
| 7240606 | Crimped piston to rod joint A method for assembling a piston on a rod, and resultant piston and rod assembly, uses one or more lock rings that are mechanically deformed radially inwardly into respective locking grooves in the rod, thereby axially locking the lock ring to the rod. The lock ring... | 07/10/2007 |
| 7240607 | Removable end plug A pressure assembly including a cylinder, an end plug and a split ring band. The cylinder has an end, an inner surface and an outer surface. The end plug is inserted into the end of the cylinder, the end plug having an outer surface that is in partial contact with t... | 07/10/2007 |
| 7237471 | Continuously lockable adjustment device A continuously lockable adjustment device for immobilizing elements which are movable relative to each other includes a stepped cylinder having a first cylinder step and a second cylinder step, the second cylinder step having a larger cross-sectional area than the f... | 07/03/2007 |
| 7237665 | Thermal energy transfer limited rotating shaft for a pneumatic fan drive system A clutch assembly (20) for a fan drive system (12) of an engine (14) includes a translatable clutch housing (30) that is coupled to a fan (16). A rotating shaft (27) has a non-grooved thermal energy transfer portion (28 | 07/03/2007 |
| 7219699 | Resin-coated steel pipe excellent in mechanical strength such as sliding property A resin-coated steel pipe is provided having excellent mechanical strength and sliding properties. A double coated structure is formed that extends in the pipe's axial direction and has substantially the same cross section. The structure has a thin steel pipe. Attac... | 05/22/2007 |
| 7204184 | Guide system with pneumatic stop for a movable component In a guide system with a pneumatic stop structure comprising a cylinder with a piston including a piston seal element movably disposed in the cylinder and a piston rod connected to the piston and extending from the cylinder wherein a displacement chamber is formed a... | 04/17/2007 |
| 7204293 | Liner seat design for a foundry mold with integrated bore liner and barrel core features A method is disclosed for producing a casting mold for an engine block, the casting mold includes a mold seat for a cast-in-place cylinder bore liner, the seat having a surface disposed at an angle relative to a longitudinal axis of the cylinder bore liner, wherein ... | 04/17/2007 |
| 7198135 | Lifting device, especially lifting platform for motor vehicles A lifting platform for motor vehicles has at least one extendable lifting column that is formed by a tubular jacket and a lifting cylinder unit arranged at least partially therein. The upper end of the lifting cylinder unit supports a load receptacle. The tubular ja... | 04/03/2007 |
| 7194949 | Magnet type rodless cylinder A magnet type rodless cylinder comprised of cylinder tube of a double tube structure provided with an outside tube of an elliptical flattened outside circumferential shape and two inside tubes inserted into the outside tube. When pressurized air is supplied alternat... | 03/27/2007 |
| 7175400 | Compressor assembly with reciprocating piston and vented cylinder A compressor assembly including a cylinder block defining first and second cavity portions. A central axis extends through first and second cavity portions. A compressible fluid respectively enters and exits the first cavity portion through an inlet and outlet. A pi... | 02/13/2007 |
| 7175001 | Apparatus for driving raising and lowering of lift for tower type storehouse There is provided an apparatus for driving the raising and lowering of a lift for a tower type storehouse so as to supply a force for vertically operating the lift carrying goods to storerooms on every floor of the storehouse, and more particularly to an apparatus f... | 02/13/2007 |
| 7171935 | Engine cylinder liner construction An engine cylinder liner construction in which a cylinder liner that is cast into a cylinder block has a tubular portion and a number of spines integrally formed on an outer surface of the tubular portion, the engine cylinder liner construction includes a chamfered ... | 02/06/2007 |
| 7150849 | Heat treatable coated article with diamond-like carbon (DLC) and/or zirconium in coating In certain example embodiments, a coated article includes respective layers including diamond-like carbon (DLC) and zirconium nitride before heat treatment (HT). During HT, the hydrogenated DLC acts as a fuel which upon combustion with oxygen produces carbon dioxide... | 12/19/2006 |
