Bizarre Patents
An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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 |
| 7766339 | Seal ring A seal ring for sealing an annular clearance between two members, which are made rotatable relative to each other. The seal ring is provided with a relief 5 throughout the circumference of a sliding face side to confront the side wall face 72 of an ann... | 08/03/2010 |
| 7341256 | Seal ring A seal ring which maintains a stable sealing performance over a long term is provided. In a first seal portion, linear contact portions which come into linear contact with the sidewall surface of an annular groove on the unsealed fluid side are continuously extended... | 03/11/2008 |
| 7165772 | Self-locking seal ring A self-locking seal ring is disclosed. The self-locking seal ring includes a ring body having a tab end segment on one end and a channel end segment on the opposite end. A lock tab is provided on the tab end segment, and a lock channel is provided on the channel end... | 01/23/2007 |
| 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 |
| 6962343 | Seal ring A seal ring is provided, which is capable of maintaining a stable sealing performance for a long period, in which a cut portion is provided at one position in a circumferential direction of a seal ring, a convex portion is provided at a first cut end portion, a rece... | 11/08/2005 |
| 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 |
| 6863277 | Piston ring for the piston of a vibration damper A piston ring for the piston of a vibration damper includes a jacket and supporting segments connected to the jacket with holding surfaces. The supporting segments are supported axially on an upper side and a lower side of the piston by the holding surfaces. The pis... | 03/08/2005 |
| 6726218 | Compression piston ring for use in internal combustion engine A compression piston ring capable of reducing excessive surface pressure at a gap and adjacent portion thereto during engine operation, and capable of being produced at a low cost. The compression piston ring has generally circular shape without any notched portion.... | 04/27/2004 |
| 6719297 | Piston ring, in particular for a piston of a vibration damper Piston ring including a covering surface which covers a circumferential surface of a piston, and supporting segments having retaining surfaces which engage the upper and lower sides of the piston. The piston ring has a butt joint which enables the piston ring to be ... | 04/13/2004 |
| 6485026 | Non-stainless steel nitrided piston ring, and method of making the same A piston ring is broadly defined as a ring-shaped, non-stainless steel, iron alloy that is nitrided, and includes between about 1% and about 10% chromium by weight, and preferably includes between about 1% and about 2% chromium by weight, with additional ... | 11/26/2002 |
| 6450295 | Feed screw device A ring-like lubricant supply device 6 is fitted into a recess 4 of a nut member 2. The lubricant supply device 6 contains a lubricant and is formed in an outer peripheral surface with notches 7. Tubular members 8 each having an outer diameter larger than ... | 09/17/2002 |
| 6397987 | Dashpot piston in halves A dashpot piston in halves, the face of each resting against that of the other. The piston can be fastened to the end of a piston rod either directly or by way of a connector. Each half (1 & 2) is provided with a depression (7) along the circumference rem... | 06/04/2002 |
| 5876040 | Reusable one piece low pressure seal The low pressure seal arrangement for sealing a space defined by an inner diameter of a pipe and a rod slidably disposed with the pipe. The low pressure seal includes a sealing insert of reusable, noncorrosive, shape retentive, resilient, boron-resistant,... | 03/02/1999 |
| 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 |
| 5836589 | Sliding member for use with lightweight metal A sliding member used as a sealing ring for a rotary shaft made of a lightweight aluminum alloy in an automatic transmission instead of a conventional cast iron sealing ring in order to prevent leakage of oil and reduce abrasion of the shaft consists of a... | 11/17/1998 |
| 5618048 | Piston ring seal having angled ends A seal assembly includes first and second annular members which reside in axial juxtaposition to be carried by one of a pair of coaxially movable components for sealingly engaging the other of the pair of components. Each of the members is severed by an e... | 04/08/1997 |
| 5513857 | Piston sealing ring having interlocking ends A sealing device for being mounted on a piston which is movably fitted within a cylinder, includes a sealing ring member having opposite end portions which are interlocked with each other along the circumferential direction of the sealing ring member, and... | 05/07/1996 |
| 4881455 | Piston for use in a gas pump A piston slidably inserted in the cylinder of a gas pump, said cylinder having a cylinder head and an outlet valve located near the cylinder head. The piston comprises a cylindrical piston body and a wear-reducing sheet wound one time around the piston bo... | 11/21/1989 |
| 4189161 | Bi-directional ring gap seal A parted sealing ring having a gap includes inner and outer faces, upper and lower sides and a bi-directional ring joint defined by a parted annular body at the gap. The joint includes a pair of circumferentially projecting elements. The projecting elemen... | 02/19/1980 |
| 4050702 | Segmented sealing structure A packing ring for use between two surfaces to be sealed relative to each other is comprised of two ring components each of which is constituted by an assembly of ring segments which are provided with a projection at one end which engages a complementaril... | 09/27/1977 |
