Locks – Attack-actuated defeating mechanisms
Patent
1989-11-13
1990-10-09
Wolfe, Robert L.
Locks
Attack-actuated defeating mechanisms
70416, 70421, E05B 6300
Patent
active
049613286
ABSTRACT:
The invention relates to a cylinder lock with a cylinder housing (1) and, rotatably mounted therein, a cylinder plug (2) comprising a key passage extending in its axial direction, with a lock bit (5) coupled to the cylinder plug and rotatably mounted in the cylinder housing (1), there being provided in the cylinder housing and in the cylinder plug a plurality of mutually aligned bores which extend into the passage and in which there are, by a spring force in the direction of the passage, plug pins which are of different lengths and housing pins which are preferably of the same length, there being formed between the cylinder housing and the cylinder plug a first separating joint traversed by the housing pins when the key is not inserted into the lock, the ends of the plug pins so co-operating with the locking notches of the key that when the key is inserted the pins are displaced in their axial direction into a position in which the bearing ends of all plug and housing pins are located in the first separating joint and so allow a rotation of the cylinder plug and of the lock bit. The invention envisages disposing in the cylinder housing (1) a displaceable barrier element (9) which locks the lock bit (5) as soon as the cylinder plug (2) is removed from the cylinder housing (1). This ensures that even if the cylinder plug is removed from the cylinder housing by force, which results in a shearing of the plug pins, the lock bit cannot be rotated.
REFERENCES:
patent: 2004434 (1935-06-01), Fitzgerald
patent: 2228971 (1941-01-01), Penkratz
patent: 4074548 (1978-02-01), Milton
patent: 4512165 (1985-04-01), Uyeda
patent: 4648255 (1987-03-01), Gartner
Gossett Dykema
Wolfe Robert L.
LandOfFree
Lock bit arresting cylinder lock does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lock bit arresting cylinder lock, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lock bit arresting cylinder lock will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-967484