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| Number | Title | Issue Date |
| 7341258 | Cammed seal assembly with sealing ring having an angled leg portion and foot portion with elastomeric energizer element A seal assembly seals first and second operational surfaces spaced apart by a gap. The first surface includes a seal groove having a base surface and first and second side surfaces. A sealing element in the seal groove has a foot portion extending parallel to the ba... | 03/11/2008 |
| 7311182 | Sealing and guiding packet To make a sealing and guiding packet available to shock dampers in order to minimize or even entirely prevent the negative effects of the so-called stick-slip effect and thus permit greater riding comfort, a sealing and guiding packet is proposed which comprises the... | 12/25/2007 |
| 7191875 | Disc brake A disc brake includes a piston seal made of rubber that is shaped to fit into a seal groove on the inner surface of a cylinder of a caliper for a brake piston. To prevent braking effectiveness from being impaired, even if the temperature of a caliper rises in a disc... | 03/20/2007 |
| 7188841 | Secondary piston seal A secondary seal is provided for an internal combustion engine having a piston, cylinder bore, ring seal, secondary seal, and leak path. Forces are applied from the combustion side of the piston through a cylinder gap and a leak path to the secondary seal. The secon... | 03/13/2007 |
| 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 |
| 7055829 | Antiextrusion device An elastomeric seal having an antiextrusion device molded integrally into or onto the low pressure side of the seal. The antiextrusion of a corrugated strip into an elastomeric seal. One embodiment of the invention has the strip positioned with the midplane of its c... | 06/06/2006 |
| 7004229 | Method and apparatus for starting and stopping a horizontal casting machine An apparatus is described for starting and stopping a horizontal casting machine, e.g. a caster for continuous casting of metal ingots. The caster comprises a feed trough for carrying molten metal, at least one casting mould and a connecting trough separately connec... | 02/28/2006 |
| 6517081 | Machinery seal A seal assembly for a groove or seal gland in a relatively displaceable machine part for sealing an axial machine part extending therethrough comprises a pair of annular seal elements and a support element disposed between the annular elements and radiall... | 02/11/2003 |
| 6502826 | Hydraulic cylinder piston seal A piston seal for sealing a high pressure hydraulic cylinder includes a rigid seal ring, an elastomeric energizer ring, and a mask structure. The mask structure is effective in decreasing explosive decompression of air entrapped under the surface of the e... | 01/07/2003 |
| 6340161 | Machinery seal A seal assembly 20 for a groove 12 or seal gland in a relatively displaceable machine part 10 for sealing an axial machine part 18 extending therethrough comprises a pair of annular seal elements 30 and a support element 50 disposed between the annular el... | 01/22/2002 |
| 6283070 | Apparatus and method for sealing internal combustion engines An improved sealing means for internal combustion engines comprising a combination of a metal primary sealing ring positioned substantially within a groove on the piston, and a compliant secondary sealing ring positioned in the groove behind the primary c... | 09/04/2001 |
| 6206248 | Dispensing piston for commodity container A piston for dispensing material from a commodity container includes a nose section connected to a piston shaft. A recessed channel is located between the nose section and piston shaft. In the channel, there is a seal lifter over which a solid wiping seal... | 03/27/2001 |
| 6199868 | Piston assembly with piston ring support and sealing member A piston ring assembly includes a piston, and at least one piston ring positioned within a piston groove. Stabilization and support of the piston is provided by a support arrangement, including at least one support member positioned radially between a bac... | 03/13/2001 |
| 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 |
| 5711206 | Piston and cylinder assembly for minimizing water blow-by in an air compressor This invention relates to a piston arrangement for minimizing water blow-by in a cylinder bore, comprising a set of metallic compression and oil rings, and a resin-filled O-ring for reducing water blow-by in the cylinder bore until the set of metallic com... | 01/27/1998 |
| 5560278 | Hydraulic cylinder with an electrical contacting and sealing ring A coaxial capacitor contacting and sealing structure, for electrical continuity between parts that move in relation to each other at the ends of a cavity within a hydraulic cylinder employing electromagnetic wave position sensing. The structure employs a ... | 10/01/1996 |
| 5490445 | Ultra low device volume piston system A piston and ring assembly operative within a cylindrical bore wall to retain pressurized fluid to one side of the assembly, the piston having a crown and an annular side wall for movement along the bore wall. The assembly comprises a piston having at lea... | 02/13/1996 |
| 5474307 | Piston ring employing elastomeric sealing member within the ring groove A piston head assembly has one, two or more grooves to receive piston rings. One or more of the grooves may receive multiple piston rings. A circumferential groove from the bottom of the elastomeric material allows oil pressure to aid in sealing. A novel ... | 12/12/1995 |
| 5328177 | Contaminant resistant piston seal with energized backup scrapers The inner annular surface of a load ring includes a concave contour such that when pressure is applied to the center of the outer surface the elastomer material will flatten out and cause oppositely disposed feet to kick up and radially outwardly and in t... | 07/12/1994 |
| 5275422 | Sealing assembly This invention relates to a fluid sealing mechanism for the inside diameter and or the outside diameter of a piston-cylinder arrangement. This device results in zero seal leakage path with low differential seal pressure required using only one piston ring... | 01/04/1994 |
| 5253877 | Piston ring having tapered outwardly extending wiper A piston head assembly has one, two or more grooves to receive piston rings. One or more of the grooves may receive multiple piston rings. One of the piston rings may have a wiper extension on the lower outside edge of the ring either of metal or elastome... | 10/19/1993 |
| 5197746 | Substantially zero leakage path sealing assembly with expander void This invention relates to a fliud sealing mechanism for the inside diameter and/or the outside diameter of a piston-cylinder arrangement. This device results in substantially zero seal leakage path with low differential seal pressure required using only o... | 03/30/1993 |
| 5193821 | Substantially zero leakage path sealing assembly with zero degree bias angle This invention relates to a fluid sealing mechanism for the inside diameter and or the outside diameter of a piston-cylinder arrangement. This device results in substantially zero seal leakage path with low differential seal pressure required using only o... | 03/16/1993 |
| 5147094 | Substantially zero leakage path sealing assembly with insulating member This invention relates to a fluid sealing mechanism for the inside diameter and/or the outside diameter of a piston-cylinder arrangement. This device results in substantially zero seal leakage path with low differential seal pressure required using only o... | 09/15/1992 |
| 5071142 | Bi-directional substantially zero leakage path sealing assembly This invention relates to a fluid sealing mechanism for the inside diameter and or the outside diameter of a piston-cylinder arrangement. This device results in substantially zero seal leakage with low differential seal pressure required using only one pi... | 12/10/1991 |
| 5028055 | Substantially zero leakage path sealing assembly with additional line to line ring This invention relates to a fluid sealing mechanism for the inside diameter and or the outside diameter of a piston-cylinder arrangement. This device results in substantially zero seal leakage path with low differential seal pressure required using only o... | 07/02/1991 |
| 4917390 | Hydraulic seal assembly An improved seal for use in a hydraulic system such as a piston rod in a housing, the seal having a stressing member and sealing member in which the latter is in point contact with, for example, a piston rod under low fluid pressure and has an additional ... | 04/17/1990 |
| 4889351 | Hydraulic seal A seal for a hydraulic cylinder is disclosed and includes a static seal element and a dynamic seal element, the dynamic seal element having a continuous, annular form, the form being inscribable in an annular section of a truncated cone and having an anti... | 12/26/1989 |
| 4875405 | Sealing device A sealing device particularly suitable for sealing pistons of working cylinders and for sealing two machine components which can slide against one another is disclosed. A conventional sealing element consisting of low-friction, but not very elastic materi... | 10/24/1989 |
| 4840379 | Split sealing ring having a bias cut An improved generally annular split sealing ring includes generally curved radially inner and outer surfaces and opposed first and second axial surfaces extending between the inner and outer surfaces. The sealing ring has an axially extending, radially ce... | 06/20/1989 |
| 4749202 | Sealing and guide unit for pistons in general A sealing and guide unit for pistons comprising an energized elastic ring placed into a corresponding cavity or groove and a rigid antifriction ring fitted on said elastic ring and projecting at both its sides to cover the extended borders of said cavity ... | 06/07/1988 |
| 4577874 | Seal assembly A two element, high and low pressure seal assembly to be used in a hydraulic or pneumatic sealing environment between two relatively movable machine parts, the seal assembly comprising a spring element, circular or rectangular in cross-section and made of... | 03/25/1986 |
| 4566703 | Seal assembly A two element, high and low pressure seal assembly to be used in a hydraulic or pneumatic sealing environment between two relatively movable machine parts, the seal assembly comprising a spring element, circular or rectangular in cross-section and made of... | 01/28/1986 |
| 4526386 | Nested serpentine seal assembly A piston seal assembly comprises a seal element of relatively hard material to resist extrusion. The element is of serpentine configuration to facilitate radial expansion. Backup elements nest with the seal element to stabilize the element within a comple... | 07/02/1985 |
| 4496161 | Radially extensible joint packing with O-ring An O-ring assembly with a generally piston-like shape elastomeric body that is radially extensible and has a circumferential groove which retains a circumferentially extensible O-ring.... | 01/29/1985 |
| 4362304 | Packing arrangement for a floating piston A packing arrangement for a floating piston dividing a cylinder into first and second chambers comprising a circumferential groove formed in the sliding surface of the floating piston; a circumferential elevation dividing the bottom of the groove into fir... | 12/07/1982 |
| 4284280 | Sealing for machine elements which move back and forth A sealing for back and forth moving machine elements, particularly for the sealing of rods for hydraulic cylinders, with a seal which seals against the housing as well as against the axially back and forth moving machine part, a preceding protection eleme... | 08/18/1981 |
| 4244280 | Piston for a pneumatic cylinder A piston for a pneumatic cylinder having a guide and sealing annular member extending around the circumference of the piston, and a resilient bearing member biassing the guide and sealing member in a direction for sealing engagement with the internal surf... | 01/13/1981 |
| 4239244 | Hydraulic piston rod seal A three-part seal to be fixed in a gland formed on the first of two mating cylindrical structures in a hydraulic apparatus. A continuous Teflon nondeformable bearing ring is provided in the gland. The bearing ring has a first cylindrical surface for conta... | 12/16/1980 |
| 4206930 | Circumferentially compressed piston ring assembly and method A sealing assembly especially adapted for high pressure hydraulic applications includes a circumferentially compressible seal ring having stepped overlapping ends and a resilient expander, preferably of oval cross-section, which assists in urging the comp... | 06/10/1980 |
