Cylinder lock-key-combination, a key therefor and a method of producing the key from a key blank
US5582050A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 2, 1994 |
| Grant date | Dec 10, 1996 |
| Priority date | — |
| Expiry date | Jun 2, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T409/303808
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cylinder lock-key-combination includes a lock cylinder, a cylinder housing (2) and a cylinder plug (3) provided with a key slot (3a) and a row of tumblers (5). The tumblers (5) and associated key (4) present mutually adapted engaging and receiving members which function to forcibly guide movement of the tumblers in two opposite axial directions as the key is inserted into the lock. For instance, the pin tumblers (5) include a circular flange (5a) and a side surface of the key (4) includes a groove (4b) which extends along the length of the key and whose width varies so as to accommodate the flanges of the rotatable or twistable tumblers. Alternatively, the tumblers are provided with a groove or a waisted portion and the key is provided on a side surface thereof with a rail which engages in the groove or waisted portion. In addition, the tumblers (5) may be provided with waisted portions (5b) to enable the tumblers to function as latching pins in coaction with a side-bar, or to form bottom tumblers for coaction with corresponding spring-activated top tumblers, or to function as locking pins in direct engagement with bores provided in the lock housing. The invention also relates to…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.