Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 8141881 | Seal and seal arrangement A seal is disclosed, for sealing a seal surface (5) between two machine parts (6, 7) which move relative to each other, wherein a seal body of the seal (1) comprises a retainer piece (10), arranged towards the groove base in a groove (... | 03/27/2012 |
| 7735834 | Two-stroke internal combustion engine with oil ring A two-stroke internal combustion engine having a seal assembly disposed between a piston and a running surface. The seal both lubricates and prevents exhaust of combustion gases. A first element, which ensures gas tightness, is received in a countersunk portion of t... | 06/15/2010 |
| 7360632 | Apparatus for controlling hydraulic brakes in bicycles, motorbicycles and the like Apparatus for controlling brakes in bicycles and the like, to be used, in particular, for disc brakes mounted on bicycles, with a pump (8) connected with a relevant reservoir (88) for the fluid of the hydraulic circuit, and comprising a piston (89 | 04/22/2008 |
| 7322377 | Hydraulic accumulator A hydraulic accumulator includes a piston (3) capable of moving in an accumulator housing (1) in its axial direction and separating a gas side (5) from a liquid side (7) of the accumulator housing (1). Guide elements (9, 17)... | 01/29/2008 |
| 7216872 | Seal for use with pipe and flange assemblies The invention relates to a seal for use with a pipe and flange assembly. The seal is intended to prevent leakage during axial movement of the pipe relative to a flange. The invention comprises a central cylindrical elastomeric member located between two circular ela... | 05/15/2007 |
| 7198275 | Sealing and replenishment gasket The annular sealing cup with axis Δ, a so-called replenishment cup, which is intended to be positioned between a hydraulic cylinder and piston and which has a axial section and has application to braking circuits comprises: ... | 04/03/2007 |
| 7195246 | Sealing material A sealing material for sealing liquid composed of a seal main body of resin, having a U-shaped cross section and a concave groove opening to an axis direction, and an O-ring of rubber fit to the concave groove of the seal main body used for medical appliances and pa... | 03/27/2007 |
| 7140291 | Oil-free/oil-less air compressor with an improved seal An oil-free/oil-less air compressor with a piston positioned for reciprocating in a bore, the piston having a first piston ring assembly made from a rigid, high temperature polymer, and a second piston ring assembly comprising a first portion that engages the bore, ... | 11/28/2006 |
| 7137492 | Apparatus for controlling hydraulic brakes in bicycles, motorbicycles and the like Apparatus for controlling brakes in bicycles and the like, to be used, in particular, for disc brakes mounted on bicycles, with a pump (8) connected with a relevant reservoir (88) for the fluid of the hydraulic circuit, and comprising a piston (89 | 11/21/2006 |
| 7108671 | Portable lumbar traction device A low-cost, light weight portable lumbar fraction device for home use by a patient including a support structure having a longitudinal axis and a carriage slidable along a portion of the support structure parallel to the longitudinal axis. The carriage includes a re... | 09/19/2006 |
| 7100925 | Pressure energized metallic seal A pressure-energized, annular metallic seal is provided that includes a central annular portion and a pair of annular leg portions extending from the central portion. Each leg portion includes a convex sealing surface lying in sealing plane. One of the leg portions ... | 09/05/2006 |
| 7083170 | Rod or piston primary seal A rod or piston primary seal, which includes a primary seal (2) facing the space (1) to be sealed and a secondary seal (3) facing away from it, in which the primary seal (2) is fitted into the groove (4), of a holding element (5... | 08/01/2006 |
| 7021632 | Self-energized gasket and manufacturing method therefor A secondary seal gasket is formed of a graphite material for higher temperature applications. The gasket is formed by multiple wraps of a graphite ribbon and then is shaped in a mold to provide a U-shaped cross-sectional configuration having a self-energizing spring... | 04/04/2006 |
| 7004474 | Seal for an endless track A seal for an endless track has a cross section having a centerline parallel to an axis of the seal and a configuration symmetric with respect to the centerline of the cross section. The seal can include an elastically deformably configured portion having a cross se... | 02/28/2006 |
| 6986407 | Sealing assembly for lubricant injector A lubricant injector having a body containing a reciprocal piston for dispensing lubricant from the body, a pin extending from the piston through an opening in the body, and a sealing assembly in the opening surrounding the pin for sealing against leakage of lubrica... | 01/17/2006 |
| 6953054 | Relief valve A relief valve is provided with an elastic body seal sealed into an annular gap between a ball receiver and a valve hole, and is slidably in contact with an inner periphery of the valve hole such that the elastic body seal is not compressed in an axial direction of ... | 10/11/2005 |
| 6938901 | Combustion gas seal for injector and sealing structure with the combustion gas seal The invention relates to a combustion gas seal for injectors and to a seal structure disposed therewith, for preventing leakage of combustion gas in a state in which an injector is mounted to an engine head. And, the number of parts is reduced, vibration and noise a... | 09/06/2005 |
| 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 |
| 6910692 | Composite elastomeric seal for sealing fluid lines A composite elastomeric seal for sealing fluid line members is provided. The composite seal comprises an outer U-shaped seal body and an inner elastomeric portion. The U-shaped seal body comprises inner and outer extending arms, each arm having a shaped contour and ... | 06/28/2005 |
| 6786489 | Sealing insert, especially for a piston in the hydraulic braking system of a motor vehicle The present invention discloses a sealing insert, in particular for a piston in a hydraulic brake system, comprising a central valve arranged in a cavity, a supporting body and a rubber-elastic sealing body that is adhesively connected to said supporting body. The s... | 09/07/2004 |
| 6722658 | Wiper with integrated seal A wiper having an integrated seal, comprising at least one dynamically stressed, first sealing lip arranged in the direction of a space to be sealed, and at least one wiping lip disposed on the side facing away from the space to be sealed. The wiper having an integr... | 04/20/2004 |
| 6648335 | Metal-to-metal seal assembly for oil and gas production apparatus A metal-to-metal seal assembly provides a dynamic seal between a piston and a cylinder. A first seal engages the inner diameter of the piston, while a second seal engages an outer diameter of the piston. The piston is disposed between an inner mandrel and... | 11/18/2003 |
| 6543784 | Wear compensating plunger-and-barrel seal for hydraulic fuel injectors In a fuel injector having a plunger-and-barrel pumping assembly, a sealing member is mounted within an annulus of a plunger to prevent the dilution of pressurized fuel within the barrel of the tool. The sealing member includes a hollowed cavity which trap... | 04/08/2003 |
| 6505838 | Pressure regulator utilizing pliable piston seal A pressure regulator uses a pliable seal to segregate a pressure confinement volume from the remaining cylinder volume. The pliable seal has a cross section comprising a pair of apexes that are disposed into grooves incorporated into the piston and the cy... | 01/14/2003 |
| 6454271 | Combined oil ring A combined oil ring is comprised of an oil ring and an expander. The cross section of the oil ring is a generally I-shape, and the outer circumferential surfaces of outer rail portions form sliding surfaces to make contact with the cylinder wall surface. ... | 09/24/2002 |
| 6205908 | Piston equipped with piston ring The present invention aims at reducing the amount of oil consumption in a piston using a piston ring continuously formed of resin without being provided with an abutment. A stepped portion is formed on a third land, which is located below a second ring ha... | 03/27/2001 |
| 6164659 | Piston rod seal A piston rod seal includes a sealing disk provided with a reinforcement element, a guide mechanism, and a support piece which are adapted to be placed consecutively in a metal pipe or similar object functioning as a housing, and which are adapted to surro... | 12/26/2000 |
| 6091175 | Self-centering rotor bearing assembly for submersible pump motors The invention provides a submersible pumping system which includes a motor containing self-centering rotor bearing assemblies. Each rotor bearing assembly in accordance with the present invention includes a sleeve, a journal, and at least two seals. The j... | 07/18/2000 |
| 6065438 | Continuous piston rings for an internal combustion engine A continuous compression ring and a continuous oil control ring for a piston reciprocally operable in a combustion cylinder of an IC engine, the continuous compression ring being cooperatively receivable in a groove extending around the piston and having ... | 05/23/2000 |
| 6062536 | Solenoid actuator with sealed armature A gas valve has a solenoid actuator which is energized to open the valve an de-energized to permit spring closure of the valve. A seal element is secured on the armature of the solenoid armature. The seal element has a skirt portion which sealingly engage... | 05/16/2000 |
| 5833245 | Elastomer ring seal for pressurized fluids An elastomer ring seal for pressurized fluids that is particularly suited for preventing unidirectional fluid flow between outer and inner cylindrical surfaces of two or more mating members, which resists permanent deformation, and is highly leak resistan... | 11/10/1998 |
| 5400927 | Liquid/flowable product filling apparatus with seal system A sealing system for use in a liquid/flowable product filling apparatus which comprises a hopper for holding the product, one or more filling assemblies, each of which includes a nozzle, a cylinder, a valve for selectively passing product from the hopper ... | 03/28/1995 |
| 5328178 | Brake master cylinder seal A ring seal for sealing a piston of a master cylinder is provided. The ring seal is fitted within a generally rectangular groove of the piston, the groove having front and rear walls joined by a floor. The ring seal prevents fluid communication from a fir... | 07/12/1994 |
| 5261677 | Seal ring A seal ring seals between a first member and a second member. The second member is provided with a circular groove having two side surfaces opposite each other and a bottom surface connected to the side surfaces. The seal ring is mounted in the circular g... | 11/16/1993 |
| 5169160 | Lubricating seal for pneumatic cylinder A lubricating seal construction for a pneumatic cylinder (10) includes a lubricating rod seal (40) and lubricating piston seals (27, 29). The rod seal includes a cavity (66) for holding a supply of viscous flowable lubricant. The piston seals include cavi... | 12/08/1992 |
| 4298562 | Method for manufacturing sealing rings The method comprises taking textile or synthetic threads and impregnating the threads by passage in a bath of an elastomer or plastomer material. Thereafter a band is formed from the impregnated threads and shaped into a ring and moulded under pressure.... | 11/03/1981 |
| 4244192 | Refrigeration system and reciprocating compressor therefor with pressure stabilizing seal A Stirling refrigeration system includes a compressor having a piston which reciprocates within a cylinder. The piston compresses and expands a working volume of gas to cause sinusoidal variations in gas pressure in a cold finger unit. The mean pressure i... | 01/13/1981 |
| 4045037 | Packing A packing member, in either strip or annular form, the member comprising two lip sections adjoined to form a broad planar head surface. Each of the lip sections has a base with an outer lateral surface, and a groove extends along the entire length, or cir... | 08/30/1977 |
| 3953213 | Piston construction for fluid power cylinders In order to preclude the entrapment of low pressure fluid in the interior of U-form seal members in the peripheral grooves of a piston for a fluid power cylinder and in turn prevent the inward deflection of such seals, there are provided cuts or notches i... | 04/27/1976 |
