Patent ID: 6688660
Filing Date: 2004-02-10
Classification: E05B,E05C,Y10S,Y10T

Abstract:
A door lock comprising:a tubular casing having a front end-plate covered with a front panel; a bolt movable in said tubular casing between an extended position and a retracted position, said bolt being spring-loaded and tending to be moved to said extended position; a spring-loaded trigger received in said tubular casing, said trigger having a front end normally extended out of said casing; a tumbler received in said tubular casing, said tumbler being adapted to retain said bolt in said extended position when said front end of said trigger is depressed while said bolt is moved to said extended position; two opposite guides situated behind said tubular casing and joined together, said guides being formed with respective grooves aligned with each other; a slider movable between said guides forward and backward, said slider being formed with a first pair of opposite cogs and a second pair of opposite cogs; a linking piece connecting said bolt to said slider; an annular follower positioned in place in said grooves of said guides, said follower having a pair of paws for selectively pushing said pairs of opposite cogs so as to move said slider and hence said bolt backward; and wherein said slider has at least one indentation defined therein while one of said guides have at least one tooth engageable with a rear end of said indentation when said bolt is fully extended, thereby providing said bolt with said extended position.