Bizarre Patents
A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 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 |
| 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 |
| 6997460 | Piston ring for piston engines The invention relates to a slot piston ring (1) for the pistons of internal combustion engines or compressors, having a peripheral recess (9) (a so-called scraper ring) that extends close to the slot (2) on the external periphery (3) of t... | 02/14/2006 |
| 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 |
| 6631908 | Compression piston ring A compression piston ring includes a ring gap defined by facing first and second end faces; a ring back situated diametrically opposite the ring gap; first and fourth quadrants extending from opposite sides of the ring gap and second and third quadrants e... | 10/14/2003 |
| 6176492 | Piston ring for shock absorber A number of embodiments of piston sealing arrangements for shock absorbers having a hydraulic cylinder in which a piston is slidably supported to define a pair of fluid chambers. The piston is provided with a peripheral groove in which a sealing piston ri... | 01/23/2001 |
| 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 |
| 5934685 | Step lock piston ring insert A piston ring seal having stepped ends with feathered edges to minimize ring expander wear in high pressure hydraulic applications. The ring seal is circumferential and comprises a resilient material surrounding a longitudinal axis having width extending ... | 08/10/1999 |
| 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 |
| 4251083 | Piston ring with tongue and groove joint A piston ring having its ends shaped to form a tongue and groove joint.... | 02/17/1981 |
