Patio door lock
US4362328A · kind A · utility
46Cited by
15References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1980 |
| Grant date | Dec 7, 1982 |
| Priority date | — |
| Expiry date | May 19, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/0839
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A patio door lock having a linkage for reciprocating movable bolts in the top and bottom of the door into and out of locked positions. A six bar linkage is provided to reciprocate bolt rods connected to the bolts by axially directed forces. A tension spring biases the bolt rods together, and stops are provided to limit an over-center motion of the linkage as assisted by the tension spring, one stop holding the linkage and bolt bars in the locked position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.