Locking system, key and key blank

US10316547B2 · kind B2 · utility

Assignee

• ABUS August Bremicker Söhne KG · DE

Inventors

• Michael H. Ulrich · Boulder, US
• Sebastian Müller · Bitterfeld-Wolfen, DE
• Thomas Pechmann · Oelsnitz, DE

Key dates

• Filing date: Nov 3, 2015
• Grant date: Jun 11, 2019
• Expiry date: Feb 23, 2037

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E05B35/001
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A locking system comprises a lock cylinder which has a cylinder housing, a cylinder core rotatably supported in the cylinder housing and having a keyway, and has a plurality of tumblers which partly project into the keyway, and which furthermore comprises a key which has a key bow and a key shaft which has a shaft profile for acting on the tumblers. An abutment section is formed at the key shaft between the key bow and the shaft profile, said abutment section having an abutment profile having at least one projection and an undercut formed between the projection and the shaft profile. The lock cylinder furthermore comprises a movable counter-abutment. In this respect, the abutment section of the key and the movable counter-abutment of the lock cylinder are arranged and configured such that, on an introduction of the key into the keyway, the abutment section abuts the movable counter-abutment with at least one abutment surface within the keyway and in so doing forms the only active abutment formed at the key for limiting the introduction of the key into the keyway to a correct axial introduction depth.