Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 7370864 | Balanced mechanical seal assembly A mechanical seal for providing a fluid-tight seal between a rotating shaft and a stationary housing comprises a first pair of seal members for sealing and separating a process fluid from a barrier fluid and a shuttle. The first pair of seal members comprises a firs... | 05/13/2008 |
| 7341648 | Method for coating piston rings for internal combustion engine The invention relates to a method for coating piston rings (10) for internal combustion engines, wherein at least the bearing surface of the piston ring is provided with an anti-abrasion and anti-corrosion coating (12) by means of a PVD or electroplati... | 03/11/2008 |
| 7311871 | Process for foaming around the peripheral edge area of cover for a motor vehicle roof and a motor vehicle roof cover A process for foaming around a peripheral edge area of a cover (10) for a motor vehicle roof, the cover being placed on or in a foaming tool and the foam mass (18) being fed into the foaming tool such that two foam mass fronts are formed which run arou... | 12/25/2007 |
| 7302961 | Surge relief valve A surge relief valve comprising a main valve body having a dome port and an inlet port. The inlet port is in fluid communication with a first fluid. The invention further includes a dome reservoir connected to the main valve body via the dome port and arranged to ho... | 12/04/2007 |
| 7221437 | Method and apparatus for measuring distances using light A method and device for measuring a distance to an object with light determines the distance by measuring the relative intensity of light reflected from the object and traveling over two or more paths of differing optical length. Light is emitted by one or more ligh... | 05/22/2007 |
| 7140616 | Sealing device The invention relates to a sealing device which is provided with an annular circumferential groove in a preceding sealing washer and having a sealing body disposed in the groove. The width and depth of the groove are larger than the cross-section of the sealing body... | 11/28/2006 |
| 7017914 | Piston assembly and method of manufacture A piston assembly having a piston and a piston ring. The ring mates to the piston in a groove on the outer surface of the piston. The ring includes two side walls that connect between inner and outer peripheral walls. The side walls converge outwardly at different a... | 03/28/2006 |
| 6588763 | Seal arrangement providing a seal between a bore and a rod moveable in the bore A seal arrangement provides a seal between a bore and a rod movable in the bore with a gap formed between the bore and the rod. The seal arrangement includes a floating elastomeric sealing ring which is accommodated in a circumferential groove around the ... | 07/08/2003 |
| 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 |
| 6428014 | Piston sealing ring assembly A piston sealing ring assembly (70) for sealing the piston/cylinder interface of a double-acting gas compressor including a first and second cut piston sealing ring (54,72) each bounded by first and second planar surfaces (6,8), the first piston sealing r... | 08/06/2002 |
| 6367805 | Stripping arrangement In a stripping arrangement for preventing liquid from penetrating at the peripheral gap (1) between a reciprocating component (2) and a casing opening (3) surrounding the latter, a choke ring (8) is provided on the side facing the inlet of the liquid to b... | 04/09/2002 |
| 6349943 | Lubricating resin composition seal rings A seal ring that is high in wear resistance and sealability, and less likely to damage an aluminum alloy mating member, and particularly a seal ring having an outer diameter of 20 mm or under and formed with a slit which can be opened easily to be fitted ... | 02/26/2002 |
| 6283478 | Piston ring structural body and method of mounting the piston ring structural body The present invention provides a piston ring structural body composed of an outer ring continuously formed of a resinous material, an inner ring continuously formed of a resinous material and a ring tensile force applying member for pressing the outer rin... | 09/04/2001 |
| 6257590 | Sealing structure and method of mounting piston ring structural body for use in the sealing stucture The present invention provides a sealing structure employing a piston ring structural body of a type wherein an outer ring continuously formed of a resinous material is pressed radially outwards by a metal coil expander via a metal inner ring provided wit... | 07/10/2001 |
| 6173965 | Actuator seal bearing assembly and method A seal bearing assembly and method for a pneumatic actuator is provided for placement within a groove in an actuator piston. For maintaining a compact size of the piston, the piston preferably has only a single encircling piston groove. In accord with the... | 01/16/2001 |
| 6158744 | Seal arrangement providing a seal between a bore and a rod movable in the bore A seal arrangement is disclosed that provides a seal between a bore and a rod movable in the bore with a gap formed between the bore and the rod. The seal arrangement includes a floating elastomeric sealing ring which is accommodated in a circumferential ... | 12/12/2000 |
| 6129358 | Unidirectional rod sealing ring for a hydraulic cylinder A unidirectional rod sealing ring adapted for forming a sealed condition in association with a member such as a piston rod or shaft axially movable in a bore of a hydraulic cylinder, the sealing ring including an elastomeric ring member having an axially ... | 10/10/2000 |
| 6105970 | Seal arrangement A sealing arrangement for establishing a seal between two machine elements, such as a rod or piston undergoing axial motion within a housing. A rod or piston seal is arranged in a groove of the second machine element, which typically is the housing of the... | 08/22/2000 |
| 6098987 | Machinery seal A seal assembly for a groove or seal gland in a relatively stationary machine part for sealing an axially displaceable machine part extending therethrough comprises a relatively flexible seal element supported by a relatively rigid support element. The se... | 08/08/2000 |
| 5988649 | Fractured seal ring A seal ring for placement in the space between a radial groove of a cylindrical member and a housing forming a bore in which the cylindrical member is movably positioned, which is free of scoring and has a fracture line through its thickness to form oppos... | 11/23/1999 |
| 5865443 | Seal ring In the manufacture of a seal ring having a cut portion at one position on the circumference by injecting a molten molding material from a gate into a cavity of a forming die, the gate is provided at a position apart from the opposite position to the cut p... | 02/02/1999 |
| 5697477 | Air damper An air damper includes: a piston adapted to reciprocate in a cylinder; an annular recessed portion formed along an outer periphery of the piston; a sealing member fitted in the recessed portion in a slidable manner, adapted to slidingly contact an inner p... | 12/16/1997 |
| 4948351 | Pressure sewer pumping system with check valve arrangement A sewage pumping system for use in residential sewer systems. The pumping system includes a sump, a intake conduit, a discharge conduit, and a pump for pumping sewage from the sump through the intake into discharge conduits. The pump is a piston type pump... | 08/14/1990 |
| 4795173 | Double O-ring sealing arrangement A double O-ring sealing arrangement for a pressure responsive device wherein a storage-buffer chamber is provided between the double O-rings and is kept at a high pressure even when the actuating pressure for the pressure responsive device is dropped belo... | 01/03/1989 |
| 4773305 | Piston pump with rolling membrane A piston pump having a flexible rolling membrane which seals the piston from the cylinder wherein the piston is designed to include an upper portion which is spaced inwardly from the cylinder wall so as to form a cavity which communicates through channels... | 09/27/1988 |
| 4466624 | Sealing arrangement The disclosed arrangement is for sealing between two cylindrical bodies with an annular gasket ring in such a way that the seal is established only under conditions of a predetermined fluid pressure, so that at a lower pressure a flow is permitted across ... | 08/21/1984 |
| 4418924 | Bi-surface sealing mechanism with rolling/sliding O-ring A sealing mechanism positioned between a movable piston wall and stationary cylinder wall concentric therewith. The sealing mechanism includes a circumferential groove formed in one of the concentric walls, and an O-ring positioned in the circumferential ... | 12/06/1983 |
| 4123068 | Lip type oil seal A lip type oil seal for a cylinder and piston arrangement, such as in a fluid clutch, wherein the seal separates two working chambers formed by the piston and cylinder. The seal has radial grooves formed in an annular surface facing one chamber, a flat an... | 10/31/1978 |
| 4090719 | Packing assembly A packing assembly for a pump employed to force fluid at a high velocity includes at least one vee shaped packing ring and a graphite ring positioned adjacent to and abutting the packing ring. These rings are maintained as one unit by first and second ada... | 05/23/1978 |
