Patent ID: 6257630
Filing Date: 2001-07-10
Classification: E05B,Y10T

Abstract:
A tubular lock with an adjustable backset, comprising:a latch bolt cylinder with a latch bolt that is retractable into or extended beyond a faceplate of the tubular lock, the latch bolt cylinder having an inner end;two casing parts assembled together to the inner end of the latch bolt, each said casing part including two first positioning holes, and a first opening, the first opening further having a recess in its periphery that defines a second positioning hole;an actuating plate including a first end operably connected to the latch bolt and a second end with two first teeth and a plurality of protrusions;a follower plate securely yet removably held by the protrusions ofthe actuating plate, the follower plate including two second teeth and a recess for receiving a portion of a lock mounting rod when the latch bolt is completely retracted; anda movable plate movably mounted between the casing parts, the movable plate being movable between a first backset position and a second backset position, the movable plate including a third positioning hole that is aligned with one of the first positioning holes of each said casing part when the movable plate is in the first backset position, the third positioning hole is moved beyond the casing parts when the movable plate is in the second backset position, the movable plate further including a second opening that aligns with the first opening of each said casing part.