Patent · US Expired

Safety lock

US4603566A · kind A · utility

6Cited by

2References

18Claims

0Family size

Assignee

Zeiss Ikon AG · DE

Inventors

Juergen Kruehn · Berlin, DE
Kurt Prunbauer · Herzogenburg, AT

Key dates

Filing date	May 17, 1985
Grant date	Aug 5, 1986
Priority date	—
Expiry date	May 17, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T70/7712
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

An improvement for a safety lock is provided which is especially useful in a double cylinder lock having a longitudinally split lock web ring, wherein the ring has a releasable interlocking connection in the form of a hinge at one side and a pair of radially extending pegs on an opposite side which can be clamped together by a retainer in the form of a washer or a clamp to secure the two halves together. If a washer is used, the pegs may have to be swedged over, but if a clamp is used in the form of a resilient member surrounding a portion of the lock ring, no swedging is required.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.