Patent ID: 6662603
Filing Date: 2003-12-16
Classification: E05B,E05C,Y10S,Y10T

Abstract:
A tubular latch, comprising:a) a latch case; b) a latch bolt, said latch bolt axially movable within said latch case from an extended position to a retracted position; c) a hub rotatably mounted within the latch case and adapted to receive a door handle shaft, said hub rotatable from a first position wherein said latch bolt is in said extended position to a second position wherein said latch bolt is in said retracted position; d) a cam, integral to an outer surface of said hub, said cam having at least one driving surface wherein rotational movement of said hub causes said driving surface to rotate with said hub; e) a slider member, said slider member movable from a first axial position in said latch case wherein said slider member is in an extended position to a second axial position in said latch case wherein said slider member is in a retracted position, said slider member moveable by rotational movement of said hub causing said driving surface of said cam to drive said slider member from the extended position to the retracted position; f) a latch spring adjuster plate moveable axially within said latch case, said latch spring adjuster plate adjustable and securable to a desired axial position within said latch case; and g) a slider member spring for biasing said slider member away from the latch spring adjuster plate, whereby changing of the desired axial position of the latch spring adjuster plate changes an initial compression amount of the slider member spring; and h) a latch bolt shaft connected between said latch bolt and said slider member, said latch bolt shaft being adjustable in length.