Patent ID: 8056379
Filing Date: 2011-11-15
Classification: E05B,Y10T

Abstract:
1. A lock cylinder comprising: a housing including a wall defining a hollow portion, and a pin portion defining a first pin chamber configured to receive a first pin; a plug including a body rotatably housed within the hollow portion of the housing, the housing and the plug cooperatively defining a shear line; a key slot disposed at least partially through the body, the key slot defined in part by a pin resting surface; a second pin chamber disposed within the body and in communication with the key slot, the second pin chamber configured to selectively align with the first pin chamber; a second pin disposed within the second pin chamber and including an outward end and an inward end, the second pin extending partially into the key slot and configured to engage the pin resting surface; and an engagement member disposed within the body, the engagement member engaged with the second pin such that the second pin is spaced a distance apart from the pin resting surface and the outward end of the second pin is spaced inward from and nearest the shear line in the absence of a key in the key slot, and the engagement member engaged with at least one of the housing and a portion of the plug such that the engagement member is substantially immovable in response to insertion of a key into the key slot.