Cylindrical lock assembly
US5145223A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1990 |
| Grant date | Sep 8, 1992 |
| Priority date | — |
| Expiry date | Oct 12, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/82
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cylindrical lock assembly (20) includes an inside subassembly (22) and an outside subassembly (24) which are assembled with a door (326). Each subassembly (22,24) includes a rose liner (26,38), a return spring cassette (28,40), a rose (30,42), a lever (32,46) and a lever insert (34,48). The inside subassembly (22) also includes a turn button (36) and the outside subassembly (24) includes a cylinder lock (44). The lever inserts (34,48) are each formed from a plastic material with a first element (400) and a second element (414) which are integrally joined by a plastic ribbon (426). In one instance, the first and second elements (400,414) are separated from the ribbon (426) and are joined to form structure which fills voids in the exterior of the levers (32,46). The voids are necessary for the insertion of the cylinder lock (44) which contains, for example, six tumbler pins. In another instance, only the first element (400) is used where the cylinder lock (44) contains, for example, seven tumbler pins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.