Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7364136 | Hoist assembly A hoist assembly for raising and lowering a load uses a plurality of flat tensile members and spool drums. A modular hoist system can be adapted to various configurations by mounting a plurality of hoist assemblies in combination. ... | 04/29/2008 |
| 7252608 | Automatic transmission having at least two conical disk sets An automatic transmission (1) is described, having a variator (5) that comprises at least two conical disk sets (2, 3), such that a wrap-around element (4) is guided via the conical disk sets (2, 3) for torque transmission with con... | 08/07/2007 |
| 7175163 | Capstan winch The invention concerns a so-called capstan winch (1) comprising drums (2, 3) driving a cable (C) and provided with a peripheral wall (22, 32) around which are strung independent peripheral rings (40–45, 50–55). Said rings are provided... | 02/13/2007 |
| 7134645 | Winch assembly for use with synthetic ropes A winch assembly is disclosed that eliminates rope crushing, even when synthetic ropes are used. Tension is applied to the rope by at least one traction sheave so that the tension at the drum is reduced. By using multiple sheaves with large wrap angles traction can ... | 11/14/2006 |
| 4925433 | Power transmitting system A power transmitting system for transmitting power between a power source, such as an internal combustion engine or an electric motor or the like, and a driven device, such as a vehicle wheel or the like, comprising an endless power transmitting device, s... | 05/15/1990 |
| 4516960 | Variable speed chain drive A variable speed chain drive includes a driven pulley which supports radially adjustable drivers, the drivers defining a wedge-shaped opening in which the chain is received and frictionally captured. The drivers, which may include cooperating clamp and dr... | 05/14/1985 |
| 4193311 | Driving pulley mechanism A driving pulley mechanism comprises at least one driving pulley consisting of two parts which are provided each with one part of a cable groove having a relatively great capacity of output transmission and are pressed toward each other by pressing device... | 03/18/1980 |
| 3934482 | Cable traction sheave A cable traction sheave is described comprising a metal sheave body fixed a rotatable hydraulic motor housing and having a novel cable groove liner. The liner is formed of a solid elastomeric and has a band of pressure release material that permits defor... | 01/27/1976 |
