Card lock and a punchable key card
OwnerWen-Yin Wuinventor
Life of this patent
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Abstract
A card lock and a punchable key card having a key card having through holes in the coordinating locatins to and the same number as long pin tumblers provided in a card lock for unlocking the lock without electric power, and a card lock having a plurality of pin tumblers--some long and some short mixed regularly or irregularly--and a dead bolt mover having through holes for the pin tumblers to fit and move is disclosed. The key card functions to push up the short pin tumblers to make the upper ends of all the pin tumblers become positioned in the same level as the upper surface of the dead bolt mover so that the dead bolt mover can be pushed further inward from the locked position to the unlocked position by the key card to retract the dead bolt to unlock the card lock.
Claims9
A card lock and a punchable key card for use with the card lock comprising:
- a card lock including a longitudinally extending cavity therein defining upper and lower lengthwise walls along with first and second longitudinally spaced open ends, a plurality of pin tumbler holes formed in said upper lengthwise wall and opening into said cavity, and a plurality of pin tumblers movably mounted within said plurality of pin tumbler holes, each of said pin tumblers including first and second portions with a predetermined number of the second portions being longer than others such that long and short pin tumblers are defined, said card lock further including a bore formed therein into which the second end of said cavity opens;
- a dead bolt slidably mounted within said bore and movable between a locked position and an unlocked position;
- a dead bolt mover slidably mounted within said cavity, said dead bolt mover including first and second longitudinally spaced ends and a plurality of through holes adapted to receive said plurality of pin tumblers, the first end of said dead bolt mover being adapted to project into said bore and engage said dead bolt to shift said dead bolt from said locked position into said unlocked position in response to sliding of said dead bolt mover within said cavity, said dead bolt mover also defining a slot between the lower lengthwise wall of said card lock and a lower surface portion of said dead bolt mover with said slot opening at the first end of said cavity;
- and
- a punchable key card including a top surface, said key card further including a plurality of through holes formed therein at predetermined positions with said through holes corresponding in number to the number of long pin tumblers such that, in the locked position, the first portion of the short pin tumblers extend into corresponding through holes in said dead bolt mover and pin tumbler holes in said card lock so that the dead bolt mover is kept immovable with the dead bolt in the locked position, and whereby when said key card is inserted into said slot, the second portions of the short pin tumblers engage the top surface of said key card and are pushed up by said key card while the second portions of the long pin tumblers extend into the corresponding through holes in said key card such that the first portions of both of the short and long pin tumblers are substantially level with the upper surface of the cavity wherein the card engages said dead bolt mover causing said dead bolt mover to slide within said cavity, to engage said dead bolt, and the cause shifting of said dead bolt to its unlocked position.
Dependencies are inferred from the claim text.