Wheel locks for video tape cassettes
US4739949A · kind A · utility
7Cited by
7References
9Claims
0Family size
Inventor
Key dates
| Filing date | Oct 20, 1986 |
| Grant date | Apr 26, 1988 |
| Priority date | — |
| Expiry date | Oct 20, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/08721
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved wheel lock for a video tape cassette is molded as one whole unit (part) of a flexible and elastic plastic material. This single part can effectively prevent the wheels of the tape cassette from free rotation or make it rotate freely, which is conventionally effected by the interaction of five units (parts). This single unit is easy to manufacture, low in its cost and accurate in its action.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.