Extended latch tube assembly
US4496178A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1982 |
| Grant date | Jan 29, 1985 |
| Priority date | — |
| Expiry date | Sep 3, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/62
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An extended latch tube housing comprises a standard deep-drawn tubular shell having a front mounting flange and rear end wall, and a coaxial second deep-drawn shell of equal diameter with its end wall fixed to the end wall of the standard shell. The standard shell of the extended housing contains a conventional latch bolt and deadlocking mechansim, and this is actuated by tailpiece means which extends to the rear of the extended housing for connection with the retractor of a cylinder lock chassis. The rear of the extended housing carries ears for connection with such chassis, preferably as part of a back plate which also locates and guides the tailpiece means. With a short housing extension, the tailpiece means may be a lengthened standard tailpiece. With a longer extension, the standard front shell assembly includes a standard tailpiece, and a second standard tailpiece member is attached thereto by a rotatably engaged connector. The back plate guides the second tailpiece member in a fixed orientation so as to maintain the connector in engagement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.