Strike plate construction for sliding glass door or window lock
US3976317A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 2, 1976 |
| Grant date | Aug 24, 1976 |
| Priority date | — |
| Expiry date | Jan 2, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/68
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A vertically elongated metal strike plate is mounted on the lock jamb of a sliding glass door or window by a pair of screws disposed on a substantially horizontal central plane through a vertically elongated strike plate aperture. The strike plate is vertically positioned so that when the door or window is slid into closed position and the lock stile is moved into abutment with the jamb, the latch hook projects through the registering central aperture. Then, when the latch is elevated by actuation of the locking lever the hook interferes with the upper back surface of the strike plate and prevents separation of the lock stile and the jamb. In the event that pry-bar forces should be exerted in an attempt to gain entry, the latch hook engages and bends the upper half of the strike plate toward the adjacent lock face, the inclination of the bent portion of the strike plate counteracting the tendency of the strike plate metal in the vicinity of the hook to deform, with the result that substantially full engagement between the hook and the back side of the strike plate is maintained despite the application of considerable pry-bar efforts. Still greater resistance to intrusion is afforde…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.