Disposable construction core
US4843852A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1988 |
| Grant date | Jul 4, 1989 |
| Priority date | — |
| Expiry date | Jun 8, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7684
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A core assembly is provided for use in a lock cylinder formed to include an axially extending core-receiving chamber of figure-8 cross-section providing upper and lower chamber portions. A throw member extending into the lower chamber portion is provided for actuating a lock assembly. The core assembly includes a plug member configured to fit in the upper chamber portion, and an actuator member configured to rotate freely in the lower chamber portion. The actuator member includes means for operably engaging the actuating means so that the lock assembly is actuable upon rotation of the actuator member in the lower chamber portion and an assembly for ejecting the plug member from the upper chamber portion in response to withdrawal of the actuator member from the lower chamber portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.