Retractable key carrier
US4524594A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1983 |
| Grant date | Jun 25, 1985 |
| Priority date | — |
| Expiry date | Mar 9, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/8757
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A key carrier includes an electromagnetic wave transmitter and a key. The key is pivotally mounted within a drum rotatably mounted in the key case. When the drum is rotated so that an opening of the drum is in alignment with an opening of the case, a spring mounted between the key and the drum biases the key out of the case. When the drum is rotated so that the openings are out of alignment, a stop surface of the case retains the key within the drum. A second spring is provided for biasing the drum such that the openings are out of alignment. A manual control wheel is provided for rotating the drum so that the openings are in alignment, so that the key can be extracted from case.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.