Quotables
"Man will not fly for 50 years."
Wilbur Wright ; 1901
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7401468 | Master cylinder A piston seal is provided in a circumferential groove formed in a cylinder body. The piston seal is capable of sealing a pressure chamber, which supplies fluid pressure to a discharge passage, from a supply passage, which communicates with a reservoir. The piston se... | 07/22/2008 |
| 7343741 | Vehicle master cylinder A master cylinder (1) having a bore (3) fitted with at least one piston (4, 5) and at least one seal (19, 20, 21, 22). The seal (19, 20, 21, 22) is partially stiffened by a reinforcement member (25). In order to retain the p... | 03/18/2008 |
| 7121552 | Piston ring A piston ring includes a lateral surface which covers a circumferential surface of a piston and support segments with retaining surfaces which engage with the top and bottom of the piston. A piston ring joint allows the piston ring to be elastically deformed in the ... | 10/17/2006 |
| 6921033 | Fuel injection valve A fuel injector, particularly for the direct injection of fuel into the combustion chamber of a mixture-compressing internal combustion engine having external ignition, include a valve housing formed by a nozzle body and a sealing ring which seals the fuel injector ... | 07/26/2005 |
| 6698763 | Piston ring A piston ring having a stainless steel base material, the base material having an upper surface, a lower surface, an inner circumferential surface and an outer circumferential surface, the surfaces each having a nitride layer formed thereon, the nitride l... | 03/02/2004 |
| 6508473 | Piston ring A piston ring is made of martensitic stainless steel. Except for the outer circumferential surface of the piston ring, a nitrided layer having a Vickers hardness of 700 or more is formed on the upper and lower surfaces and inner circumferential surface, a... | 01/21/2003 |
| 6416058 | Packing seal with dynamic self-adapting lip The invention concerns a packing seal with its lip (1) placed in a toroidal housing (2) of a part (3) mobile in rotation and/or translation relatively to a part (4) and whereof the lip (5) ensuring the seal between the lining and the part (4) exerts on sa... | 07/09/2002 |
| 6325384 | Tank piston with improved seal and wiper A tank piston is shown with an improved seal and wiper. The piston is used in conjunction with tanks used for transporting semi-solid and viscous materials such as grease, oil, ink, and the like. The improved seal consists of an annular rubber member with... | 12/04/2001 |
| 5794941 | Piston ring assembly An improved piston ring assembly comprises a double-offset expander spring and a piston ring. The expander spring has a first wave portion that is continuously engaged in an annular groove of a piston body, the wave portion having an axial extent that is ... | 08/18/1998 |
| 5794943 | Piston rings particularly suited for use with ceramic matrix composite pistons and cylinders A piston ring for use with ceramic matrix composite engine cylinders. In one embodiment, an extra-hard material is used for a conventional ring design. In another embodiment, a hardened edge employing Tungsten Carbide Cobalt is employed. The same edge tre... | 08/18/1998 |
| 4499643 | Process for manufacturing a piston ring A process for manufacturing a piston ring is disclosed wherein web-like first metal member which will form a base of a piston ring and web-like second metal member which will form a wear resistant layer of the piston ring are separately fed and joined tog... | 02/19/1985 |
| 4497102 | Process for manufacturing a piston ring A process for manufacturing a piston ring is disclosed wherein web-like first metal member which will form a base of a piston ring and web-like second metal member which will form a wear resistant layer of the piston ring are separately fed and joined tog... | 02/05/1985 |
| 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 |
| 4323257 | Piston ring with a Cr-C-Fe inlaid ring in its outer surface, and a method of making it A piston ring preform is formed with a groove dividing its cylindrical outer surface, and this groove is filled up by plasma-spraying with a deposit of alloy whose surface is flush with the cylindrical outer surface of the preform not deposited with alloy... | 04/06/1982 |
| 4307890 | Piston ring with chrome-filled groove A piston ring having an annular groove in its outer periphery forming axially-spaced outer shoulders at each side of the ring, such groove including a bottom land and a pair of axially-spaced, radially intermediate lands connected to the bottom land and t... | 12/29/1981 |
| 4185843 | Friction wear experiencing machine part having a coating on its sliding surface A machine part, such as a piston ring or sealing strip for an internal combustion engine, having one surface arranged to be in sliding contact with a cooperating part to thus be subjected to friction wear, the machine part being provided with a recess ext... | 01/29/1980 |
| 4179131 | Seal arrangements A seal arrangement comprising three sealing rings. The first ring is intended to locate in a groove in a first machine element and has a bearing surface by which it is bearable against the base of the groove of the first machine element, and a surface spa... | 12/18/1979 |
| 4040637 | Low friction balanced piston ring A low friction piston ring of split annular construction has a circumferentially extending recess formed at its upper outer portion to define an outer radial ledge which divides the outer axial surface of the ring into a recessed outer face and a reduced ... | 08/09/1977 |
| 3944236 | Piston ring A piston ring whose piston ring sliding surface is provided with a channel having chrome plating layer, with grooves continuously or discontinuously provided on the borders of the chrome layer and land portions of the piston ring sliding surface so that t... | 03/16/1976 |
