Axial tumbler cylinder lock and key

Details Axial tumbler cylinder lock and key Axial tumbler cylinder lock and key

1993-09-30

1995-04-04

Gall, Lloyd A.

Locks

Operating mechanism

Key

70395, 70397, 70404, 70454, E05B 2708

Patent

active

054026601

ABSTRACT:
A cylinder lock having a key insertion hole or clearance formed between a casing and a key guide member. A key for the cylinder lock is provided with a thin cylindrical member which is to be inserted into the annular key insertion hole when the key is inserted into the cylinder lock. The cylindrical member is filled at its first end section with a part of a key shank. A slider is slidably disposed inside the cylindrical member and normally located inside the second end section of the cylindrical member. The slider is formed at its tip end with a fitting projection which is to be fitted in a guiding depression formed at the tip end face of the key guide member. The key insertion hole is formed narrow or thin, corresponding to the thin cylindrical member of the key, thereby preventing a picking tool from being inserted through the narrow key insertion hole into the cylinder lock.

REFERENCES:
patent: 54678 (1866-05-01), Bowman
patent: 3339384 (1967-09-01), Greenwald
patent: 3903720 (1975-09-01), Scherbing
patent: 3992907 (1976-11-01), Pilvet
patent: 4100777 (1978-07-01), Fredon
patent: 4191036 (1980-03-01), Steinbach
patent: 4831853 (1989-05-01), Liao
patent: 5024072 (1991-06-01), Lee

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