Patent ID: 6886871

Claim:
A tubular lock comprising: an inside assembly including an inside rose and an inside rose liner; an outside assembly including an outside rose and an outside rose liner; a latch mechanism including a latch; at least one of the inside assembly and the outside assembly including a spindle operably connected to the latch for retracting the latch and a handle connected to the spindle to turn therewith; and a fireproof cover including a longitudinal through-hole through which the spindle extends, the fireproof cover being mounted outside the outside rose liner and thus covering the outside rose liner; the inside rose liner, the outside rose liner, and the fireproof cover being engaged together; the outside rose liner including a housing extending from an inner face thereof, the housing including two mounting portions each having a screw hole, the inside rose liner including two holes respectively aligned with the screw holes of the outside rose liner, the fireproof cover including two legs each having an end piece on a distal end thereof, the respective end piece having a hole aligned with the respective screw hole of the outside rose liner, two screws being respectively extending through the holes of the inside rose liner and the holes of the fireproof cover into the screw holes of the outside rose liner.