Cylinder-lock attachment means
US4548061A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 22, 1982 |
| Grant date | Oct 22, 1985 |
| Priority date | — |
| Expiry date | Jun 22, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/8568
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In an attachment fitting for cylinder locks (3, 3') the heads (4a) of a plurality of screws (4) are seated in a widened hole portion (5a) in the lock. A plugging or latching element (6) is arranged to co-act with a sealing pin (7) in a manner such that when the plug (3a) of the cylinder lock (3) is turned to a given position by means of a key, the sealing pin (7) moves inwardly in a peripheral hole (9) arranged in the plug, against the action of a spring (10). This enables the plugging or latching element (6) to be removed. Because of the presence of the plugging or latching element (6), however, the screw heads (4a) cannot be reached in order to loosen the screws by persons not having the correct key to the cylinder lock. The screws connect the cylinder lock (3) to a further cylinder lock (3') on the other side of the door.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.