Patent ID: 6047577
Filing Date: 2000-04-11
Classification: E05B,Y10S,Y10T

Abstract:
In a door lock having,a cylinder housing for mounting within a door,a cylinder disposed for rotation within the housing,a row of radial channels in the housing,a matching row of radial channels in the cylinder, andspring loaded pins of selected lengths slidably disposed within said channels and adapted to be radially positioned by a profile section of a first selected key to permit rotation of the cylinder within the housing,the improvement comprising:at least one other channel radially disposed in the housing and in the cylinder at an angle apart from the first rows of channels,a further pin member slidably disposed in said other radial channel, the position of which is determined by the engaging surface of a second selected key,a spring loaded axial pin assembly disposed for axial movement within the housing, andrestraining means urged radially outwardly by the further pin member for holding the axial pin assembly in an externally visible position,said restraining means being moved out of engagement with said axial pin assembly upon radial inward movement of the further pin member when engaged with a depressed profile section of the second selected key, allowing the release of the spring loaded axial pin assembly to the externally non-visible position in the door.