Patent ID: 6622538
Filing Date: 2003-09-23
Classification: E05B,Y10T

Abstract:
A lock comprising:a stationary cylinder housing formed with a seat; a core rotatable about an axis in the housing and formed with an axially extending key passage, a plurality of transverse guide slots, and an axially extending bore; a bolt axially displaceable in the bore between a locked position and a retracted unlocked position and having a plurality of radially open grooves aligned transversely with the slots in the locked position of the bolt, the core being rotationally fixed in the housing when the bolt is in the locked position; means coupled to the bolt for engaging in the seat of the housing when the bolt is in the locked position for arresting the core in the housing; respective tumbler plates transversely displaceable in the slots and each formed with a control edge exposed in the passage and a hole alignable with the bore in a freeing position of the respective plate, each plate being displaceable from the freeing position to a blocking position with its hole offset at least partially from the bore and engaging in the respective groove to block axial movement of the bolt from the locked position; and a key having a plurality of respective bit notches engageable with the control edges on axial engagement of the key in the passage, the control edges and the respective bit notches being positioned such that when the key is fully inserted in the passage all the plates are in the freeing position and the bolt can shift axially between its locked and unlocked positions.