Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7243596 | Spacer expander In a combined oil ring having a spacer expander to be installed between a pair of upper and lower side rails, a plurality of axially protruding inner peripheral protruding portions are formed on the inner peripheral side of the spacer expander along its peripheral d... | 07/17/2007 |
| 7117594 | Oil-scraper piston ring and a method for producing an oil-scraper piston ring A piston oil control ring with at least one tapered running rail, provided with a wear-resistant coating, characterized in that a radial elevation with predetermined radial height and width, which is provided with the wear-resistant coating, is provided in the regio... | 10/10/2006 |
| 7017254 | Rail clip for seat bases A monolithic rail clip, formed from a single piece of material, comprising a plurality of integrated hooks spaced along an angled rail body for use in constructing a seat base. A pair of the rail clips are attached to a pair of opposing members of a frame of the sea... | 03/28/2006 |
| 6655697 | Piston oil ring having land flanked by concave sidewalls An oil control ring for a piston of an internal combustion engine has an annular body defining a central axis. The ring has a U-shaped cross-section formed of a centrally positioned web extending parallel to the axis and a pair of axially spaced rail port... | 12/02/2003 |
| 5820131 | Piston ring having wear coating consisting of Cr2 N or a mixture of Cr2 N and Cr A Cr2 N film or a mixed Cr2 N and Cr film formed by physical vapor deposition on the outer circumferential surface of a piston ring which is in contact with the inner circumferential surface of a cylinder. The axial width of the oute... | 10/13/1998 |
| 5052698 | Two-piece type oil ring assembly A two-piece type oil ring assembly consisting of a single spacer expander in the form of a split annulus and a side rail in the form of a flat split annulus. The spacer expander has a flat lower surface for making plane contact with the lower side of an o... | 10/01/1991 |
| 4629198 | Oil scraper piston ring assembly An oil scraper piston ring assembly includes an oil scraper ring received in a piston groove and being in circular contact with a first side wall of the groove; and a spring ring received in the groove between the oil scraper ring and a second side wall o... | 12/16/1986 |
| 4226430 | Two-piece oil control ring A two-piece oil control ring including a parted or split rail ring and a spacer-expander is disclosed. The spacer-expander includes a plurality of circumferentially spaced, cylinder wall engaging segments. Pairs of the segments are alternately interconnec... | 10/07/1980 |
| 4145060 | Axially and radially clamping spreader ring for an oil scraping piston ring An axially and radially clamping spreader ring for an oil scraper piston ring, comprises a profiled metal band which has been made resilient in the circumferential direction by corrugations and/or cuts. The two ends of the metal band abut against one anot... | 03/20/1979 |
| 4111437 | Oil control ring spacer-expander with improved slip latch In a parted spacer-expander for a piston oil control ring of the type which includes an array of alternating inner and outer crowns connected by generally diverging spring legs and a support pad extending radially from each inner crown and connected there... | 09/05/1978 |
| 4053164 | Spacer-expander for a piston oil control ring In a spacer-expander for a piston oil control ring of the type which includes a circumferential series of alternating inner and outer crowns successively connected by radially diverging spring legs and a support pad extending radially outwardly from each ... | 10/11/1977 |
