Patent ID: 8266937
Filing Date: 2012-09-18
Classification: E05B,Y10T

Abstract:
1. A locking device, comprising: a locking cylinder; and a matching key, the locking cylinder having a cylinder core with a key channel for inserting the key and pin holes, in which tumbler pins are mounted, opening out into the key channel, in which pin holes tumbler pins are mounted, the tumbler pins forming a head with a tip and a conical surface which follows on from the tip, the head engaging in a coding recess of the key and being supported there by the tip on a portion of walls of the coding recess, the walls forming a first sliding flank, on which the head of each of the tumbler pins lie in an abutting position before the axial displacement of the tumbler pins in the pin holes that is brought about by withdrawal of the key from the key channel and along which the key slides in a first phase of movement during the withdrawal of the key, and the wall forming a second sliding flank, which follows on from the first sliding flank in a transitional region, the second sliding flank slopes more steeply than the first sliding flank with respect to a direction of extent of the key and on which the head slides along in a second phase of movement during the withdrawal of the key, wherein dimensions of the conical surface following on from a rounding of the tip and the first sliding flank are made to match one another in such a way that the transitional region is covered by the conical surface in an abutting position.