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1. AU2001048308 - Locking system, especially for motor vehicles

Office
Australia
Application Number 48308/01
Application Date 02.02.2001
Publication Number 2001048308
Publication Date 08.11.2001
Publication Kind A
IPC
E05B 29/00
EFIXED CONSTRUCTIONS
05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
29Cylinder locks with plate tumblers that are set by pushing the key in
E05B 29/04
EFIXED CONSTRUCTIONS
05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
29Cylinder locks with plate tumblers that are set by pushing the key in
02operated by the edge of the key
04arranged singly
CPC
E05B 29/00
EFIXED CONSTRUCTIONS
05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
29Cylinder locks ; and other locks; with plate tumblers which are set by pushing the key in
Applicants Huf Hulsbeck and Furst GmbH and Co. KG
Inventors Barrenberg, Gunter
Sander, Dieter
Priority Data 10005136 04.02.2000 DE
Title
(EN) Locking system, especially for motor vehicles
Abstract
(EN) The invention relates to a locking system comprising a lock cylinder for an inner track key comprising at least two coded tracks (61, 62) on one side of the key (60) and a number of plate tumblers (40) are arranged in a cylinder core (30). In order to improve four-track locking systems of this type, the height ratios between the maximum progressive ratio hcode 1 (71) of the first coded track (61) of one key side, the maximum progressive ratio hcode 2 (72) of the second coded track (62) of the same key side, the key height hS (76) and the height hT (74) of the partial areas (42) on the plate tumblers (40) are selected such that they satisfy the equation hcode 1 (71) + hcode 2 (72) + hT (74) > hS (76). This measure completely prevents the ability to pick inventive locks of this type using known tools for breaking in, e.g. a 'Little Joe' tool. The invention also provides that all partial regions (42) of the plate tumblers are assigned to one side of the lock cylinder and each second plate tumbler is loaded in a direction toward the cylinder jacket that is opposite the direction of the spring loading of the preceding plate tumbler.
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