Cylindrical lever-type door lock
US5761936A · kind A · utility
43Cited by
22References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 28, 1996 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Aug 28, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/93
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This invention is directed to a door lock including a housing with a lock body which cannot be easily rotated when a burglar attempts to forcedly further rotate the outside lever handle in excess of a limit for withdrawl movement of a latching slide body. A pluality of ingagement portions which react counter to a rotary motion are formed in the housing of the lock body, and a plurality of fixed engagement rods engage with the engagement portions are assembled relative to an inside fixed plate extended into an inner side wall surface of the door.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.