Patent ID: 6543265
Filing Date: 2003-04-08
Classification: E05B,E05C,Y10T

Abstract:
A door lock-and-handle assembly adapted to be mounted on a door panel having inner and outer sides, said lock-and-handle assembly comprising:a bolt receiving housing adapted to be mounted on the inner side of the door panel and having a side wall that is formed with a bolt opening; a latch bolt mechanism including a latch bolt mounted movably in said bolt receiving housing and turnable between first extended and retracted positions for moving in and out of said bolt opening, and a latch biasing member that urges said latch bolt to turn toward said first extended position; a dead bolt mounted slidably in said bolt receiving housing adjacent to said latch bolt, and slidable in a transverse direction relative to said side wall between second extended and retracted positions for moving in and out of said bolt opening; an escutcheon adapted to be mounted on the outer side of the door panel, aligned with said bolt receiving housing, and having a mounting wall that is formed with a lock receiving recess which is defined by a recess-confining wall, a spindle hole which is defined by a hole-confining wall extending from said recess-confining wall in an axial direction, and at least an engaging groove which is defined by a groove-confining wall extending from said recess-confining wall in a radial direction relative to said axial direction; a handle mounted turnably on said mounting wall of said escutcheon, surrounding said spindle hole, formed with a keyhole that is aligned with said spindle hole in said axial direction, and having a driving member that extends through said spindle hole and said lock receiving recess and that is turnably coupled to said latch bolt so as to move said latch bolt between said first extended and retracted positions; a spindle adapted to be turned by a key that is inserted into said keyhole, defining an axis in said axial direction, extending through said spindle hole, said lock receiving recess, and the door panel in said axial direction, and turnably coupled to said dead bolt so as to move said dead bolt between said second extended and retracted positions upon turning about said axis, said spindle having an engaging portion; at least a locking member received in said lock receiving recess and having a central part that is formed with a spindle opening defined by an opening-confining wall, and an engaging tongue that projects from said central part and that is aligned with said engaging groove in said axial direction, said spindle extending through said spindle opening in a manner that said engaging portion is received in said spindle opening to turnably engage said opening-confining wall so that turning of said spindle from a first angular position to a second angular position results in radial movement of said locking member to a locked position, where said engaging tongue extends through said driving member and into said engaging groove to releasably engage said driving member and said engaging groove so as to prevent turning of said handle, and that turning of said spindle from said second angular position to said first angular position results in radial movement of said locking member to an unlocked position, where said engaging tongue disengages from said driving member and said engaging groove so as to permit turning of said handle; and a lock releasing member including a driven leg that projects from and that is movable together with said dead bolt so as to be disposed at a position proximate to said latch bolt when said dead bolt is positioned at said second extended position, and so as to be driven by said latch bolt to synchronously move said dead bolt from said second extended position to said second retracted position and said locking member from said locked position to said unlocked position when said latch bolt turns from said first extended position to said first retracted position, thereby permitting turning of said handle and preventing undesirable locking actions of said dead bolt and said locking member.