Door lock having disengages outer lever handle when in the locked condition and means to bias the handle toward horizontal position
US4920773A · kind A · utility
60Cited by
20References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 8, 1988 |
| Grant date | May 1, 1990 |
| Priority date | — |
| Expiry date | Feb 8, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/865
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drive element in this lock pushes a radially directed outward finger out of its longitudinal slot in the outer tubular spindle to disengage the outer handle from the latch so that the handle free-wheels. Spring means in the outer handle rose returns the handle to its normal horizontal position when the handle is released. The handle is preferably in lever form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.