Rotary handle operated door lock
US4706478A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1986 |
| Grant date | Nov 17, 1987 |
| Priority date | — |
| Expiry date | Apr 11, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/96
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rotary handle operated lock includes a pan-shaped housing member that has a back wall at the base of a forwardly facing recess. A guide member is welded to the rear face of the back wall and cooperates with the back wall to define a sturdy guide channel which slidably mounts a control member form movement between locked and unlocked positions. A shaft extends through aligned holes that are formed in the back wall and in the guide member, and through a keyhole shaped slot that is formed in the control member. The shaft has a front end region that carries a pivotally mounted, nestable operating handle, and a rear end region that carries a latching arm. The operating handle and the latching arm rotate with the shaft between latched and unlatched positions. The shaft has opposed flat side surfaces that are selectively engaged and released by the opposed flat sides of the keyhole shaped slot when the control member is moved to its locked and unlocked positions, respectively, whereby the shaft is prevented from rotating or permitted to rotate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.