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| Number | Title | Issue Date |
| 7963211 | Reciprocating gas compression installation with controlled leakage rate The invention relates to a reciprocating installation (1) for the compression of a current gas, comprising: at least one cylinder (2) which defines a compression chamber (3); a piston (4) which co-operates with the cylinder, an actuation ... | 06/21/2011 |
| 7793584 | Check valve structure of hydraulic damper There is provided a hydraulic damper including a receiving space formed between a rod guide of a cylinder and an insert metal, for temporarily retaining a working fluid leaked out from an oil chamber through a sliding gap of a rod. The hydraulic damper further inclu... | 09/14/2010 |
| 7762177 | Hydraulic cylinder unit A hydraulic cylinder unit is provided with a rod seal and/or piston seal which has a surface that deviates from the vertical circular cylindrical surface of the piston head throughhole through which the piston rod passes or the vertical circular cylindrical surface ... | 07/27/2010 |
| 7640841 | Annular seal and pump including same A seal includes a seal body forming an annular sealing surface. The annular sealing surface includes an annular ridge protruding substantially radially from the annular sealing surface. The seal body includes an annular cavity. The seal also includes first and secon... | 01/05/2010 |
| 7284474 | Piston-pumping system having o-ring seal properties The present invention relates to a piston pumping system for substantially gas-free measurement and/or pumping of predetermined quantities of liquids, preferably pharmaceutical liquids containing oxidation-prone ingredients. Preferably, the system is used as a micro... | 10/23/2007 |
| 7255207 | Piston seal and disc brake using the piston seal A piston seal of a disc brake can stabilize the amount of rollback of a piston by reducing thermal expansion and a decrease in modulus of elasticity of the piston seal caused by an increase in temperature, thereby preventing a driver from feeling that the brake oper... | 08/14/2007 |
| 7247006 | Method and apparatus for sealing an ultrahigh-pressure fluid system An ultrahigh-pressure fluid system, such as an ultrahigh-pressure fluid pump, includes an improved dynamic seal assembly that can withstand pressures above 40,000 psi, and more preferably, pressures up to and beyond 87,000 psi. The dynamic sealing assembly includes ... | 07/24/2007 |
| 7247005 | Oil seal arrangement A motor-driven gear pump assembly includes a rotary shaft rotatably mounted in a housing, and a pump mounted on the rotary shaft. The pump has a pressure chamber. A high-pressure seal is disposed around the shaft between the pump and the motor. A low-pressure seal i... | 07/24/2007 |
| 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 |
| 7228787 | Method for joining the functional parts of hydraulic or pneumatic working devices, and joining connection Joining connections are presented for joining the functional parts of hydraulic or pneumatic operating devices the joining connections including a first part exhibiting an external wall section and a second part exhibiting an internal wall section, which are joined ... | 06/12/2007 |
| 7182016 | High pressure fluid cylinder system A high pressure fluid jetting system generally includes a fluid cylinder pump, a drive assembly, a pressurized liquid supply and an applicator gun. The drive assembly includes a diesel or electric powered motor which drives a rotatable drive shaft. The drive shaft d... | 02/27/2007 |
| 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 |
| 7168856 | Wet cup throat seal and bearing assembly Wet cup throat seal (3) and bearing (2) combination is designed for use in a reciprocating piston pump where in the wet cup (1) is designed to hold the seal assembly thereby insuring proper displacement rod (5) alignment and maximizing se... | 01/30/2007 |
| 7162947 | Mount for cylinder position sensor A method and apparatus for determining the position of a rod member of a cylinder assembly are provided. The cylinder assembly may include a cylinder body, a gland member, a sensor mount, a rod member, and a position sensor attached to the sensor mount. The cylinder... | 01/16/2007 |
| 7097004 | Pressure bleeding boot-type seal A boot-type seal having a seal and a valve. The seal has a first seal member, which is configured to sealingly engage a first surface, and a second seal member, which is configured to sealingly engage a second surface. The valve is coupled to the seal and is operabl... | 08/29/2006 |
| 7066470 | Active seal assembly A seal assembly includes an annular hanger having a supporting ledge. An arcuate seal segment includes an outer rail mounted on the ledge and supporting an inner seal. An arcuate carrier is mounted between the hanger and the rail, and includes a piston mounted in a ... | 06/27/2006 |
| 7044340 | Apparatus and method for optimally mixing and applying a two part epoxy An apparatus and method for mixing and injecting or applying a viscous material which is especially useful for mixing and applying a two part epoxy. The apparatus in its preferred form utilizes two uniformly heated holding tanks with auger feeds which each feed two ... | 05/16/2006 |
| 7021633 | Low friction fluid seal device with additive to rubber compound A fluid seal device for use in sealing an annular space between an internal surface of a cylinder and a member therein having an outer cylindrical surface and being formed at least in part from rubber. An oleamide additive is included in the rubber compound comprisi... | 04/04/2006 |
| 7017915 | Stem or shaft seal arrangement An improved seal arrangement in an assembly such as a valve assembly in which a compression member is provided to press a seal between the compression member and the valve body. In a preferred form, the compression member includes a recess which receives a first por... | 03/28/2006 |
| 6978712 | Variable displacement piston type pump A method of providing variable pumping rate from a piston type pump at a constant drive speed, comprising providing a connecting rod connected to the throw of a crankshaft on one end and to a connecting pin on the other end, constraining said connecting pin to move ... | 12/27/2005 |
| 6928922 | Lubricating structure for hydraulic driving apparatus Seal sections, which support first and second piston rods, are provided on inner circumferential surfaces of first and second cover members of a cylinder mechanism. A lubricant is supplied via supply passages and oil supply ports to first oil-retaining members, whic... | 08/16/2005 |
| 6913266 | Sealing device A sealing device for a shaft (2) or rod which is movably disposed in a guide arranged between a high-pressure space (10) and a low-pressure area (11) of a pressure-resistant housing (1) bounding the high-pressure space (10), and wh... | 07/05/2005 |
| 6889597 | Adjusting element having a cylinder An adjusting device includes a piston cylinder unit with a cylinder having a piston and a piston rod movably arranged therein, the piston rod extending out of the cylinder. A piston rod guide includes a support element having a first part arranged in the cylinder an... | 05/10/2005 |
| 6871578 | High-pressure fuel supply apparatus The object of the present invention is to provide a high-pressure fuel supply apparatus, in which the durability of the fuel sealing section is improved and additionally the evaluation time is reduced. The high-pressure fuel supply apparatus comprises a piston havin... | 03/29/2005 |
| 6862884 | Master cylinder A master cylinder (10) for a vehicle hydraulic brake system has a housing (12), which has a bore (14), which extends along a longitudinal axis (A) and is sealingly closed at one end by an end wall forming part of the housing (12) of the m... | 03/08/2005 |
| 6843163 | Booster using a seal that also serves to set the position A pneumatic brake booster comprising a rigid casing (10) locally shaped into a hollow shaft (3), a hub (5) slideably mounted in an opening (30) of the hollow shaft (3), an annular seal (6) inserted between the hub (5)... | 01/18/2005 |
| 6840153 | Fire protection in a piston-cylinder unit Piston-cylinder unit comprising a cylinder in which a work space is filled with a work medium and which is limited by a closure and is sealed by at least one seal. The closure is fixed axially by a positive engagement with the cylinder up to a temperature threshold ... | 01/11/2005 |
| 6811158 | Seal A seal for sealing an interface between a piston shaft (4) of an expander mechanism for a disk brake and an inner surface of a housing (5) of the brake in which the shaft is received is described. The seal comprises: a laterally outwardly disposed port... | 11/02/2004 |
| 6796216 | Guide for the piston rod of a piston-cylinder assembly Guide for the piston rod of a piston-cylinder assembly, especially for a vibration damper, a shock-absorbing strut, or a level-control device. The guide has a guide body with an outer end surface holding a piston rod seal, where the piston rod is installed in the gu... | 09/28/2004 |
| 6789459 | High-pressure fuel pump A high pressure fuel pump includes a cylinder having a pressurizing chamber and a plunger inserted into the cylinder. The plunger is axially reciprocated by a lifter to pressurize fuel in the pressurizing chamber. A seal member encompasses a portion of the plunger t... | 09/14/2004 |
| 6752068 | High pressure fuel supply apparatus A high pressure fuel supply apparatus 6 has a plunger 161 reciprocating and sliding in a sleeve 160 of a high pressure fuel pump 16 to form a fuel pressurizing chamber 163 between the plunger 161 and the sleeve 160 to... | 06/22/2004 |
| 6748848 | Waste gate valve actuator A waste gate valve actuator is provided for use with a turbocharger having a flexible and durable thin non-fabric diaphragm substantially uniform in thickness comprised entirely of a thermoset or thermoplastic fluorocarbon material. ... | 06/15/2004 |
| 6684985 | Compressed air-operated disc brake The invention relates to a compressed air-operated disk brake comprising a brake caliper to which a compressed air cylinder can be attached via a flange and in which a turning lever can be pivoted by a plunger rod of the compressed-air cylinder. The inven... | 02/03/2004 |
| 6658987 | Sealing device for a piston which is subjected to the action of a pressure medium and which is arranged in a working cylinder A sealing device for a piston that is subjected to the action of a pressure medium and that is arranged in a working cylinder, whereby a piston rod guide is arranged in or on the working cylinder and the rod guide has annular recesses. In addition, elasti... | 12/09/2003 |
| 6651988 | Compact actuator with hydraulic seal An actuator for use in an active mount system for reducing vibration transmission from a vibrating component to a support structure. The actuator is disposed in a housing that is attached to the vibrating component or the support structure. The actuator i... | 11/25/2003 |
| 6651547 | Guide for the piston rod of a piston-cylinder assembly Guide for the piston rod of a piston-cylinder assembly, especially for a vibration damper, a shock-absorbing strut, or a level-control element, where the guide body holds the cylinder tube and the outside tube and simultaneously centers the piston rod in ... | 11/25/2003 |
| 6644430 | Integral bushing assembly for a rack and pinion steering gear A fluid power assisted rack and pinion steering apparatus (10) for a vehicle includes a rack (40) connectable with steerable wheels of the vehicle, a housing (20) partially enclosing the rack (40) and defining a fluid chamber (39), a bushing (390 or 590) ... | 11/11/2003 |
| 6622832 | Hydraulic shock absorber A rod guide is press-filted to an inner periphery of an outer cylinder and to an inner periphery of an inner cylinder. A rod seal is provided at an inner periphery of a cover member for covering the outer cylinder to seal between a piston rod and the cove... | 09/23/2003 |
| 6598512 | Piston pump The invention relates to a piston pump, for instance for an electrohydraulic vehicle brake system. The invention proposes that a pump piston, on an end toward an eccentric element, be sealed off with a sealing ring, such as a quad ring, that has two axial... | 07/29/2003 |
| 6578360 | Master cylinder A master cylinder including a cylinder having one end open to the outside. A secondary piston guide ring, a sleeve and a primary piston guide ring are adapted to be fitted in this order into the cylinder from the one open end. A piston is slidably fitted ... | 06/17/2003 |
