Patent · US Expired

Locking device and reversible key

US4964288A · kind A · utility

80Cited by

4References

13Claims

0Family size

Assignee

DOM-Sicherheitstechnik GmbH & Co. KG · DE

Inventors

Peter Braun · Hungen, DE
Herbert P. Hauser · Sindorf, DE
Alexander Stefanescu · Cologne, DE

Key dates

Filing date	Jul 31, 1989
Grant date	Oct 23, 1990
Priority date	—
Expiry date	Jul 31, 2009

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T70/7881
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A locking device comprises a lock cylinder and a reversible flat key having indentations located on opposite broad faces of the key for the arrangement of tumbler pins, and having a rib associated with each row of indentations, into the sectional area of which at least one of the pins extends and the crest of which rib projects beyond the broad face of the key. The deepest reached indentation lies nearest to the crest of the rib and several indentations of a row of indentations are integrated into a through groove of variable depth levels.

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