Lock

Details Lock Lock

2005-09-13

2005-09-13

Mah, Chuck Y. (Department: 3676)

Locks

Special application

For closures

C070S479000, C070S475000, C070S208000

Reexamination Certificate

active

06941778

ABSTRACT:
A lock for a door (10) comprises a casing (11), a bolt (55) operable to extend from or retract into the casing, a pivoted operating handle (36) operable at one side of the door to retract the bolt, lock means (28) for key operation at the other side of the door, and blocking means (81) to prevent operation of the handle to retract the bolt. In a locked closed position of the door, the bolt (55) is extended, and with the blocking means operated, key operation of the exterior lock means (28) both retracts the bolt and also de-actuates the blocking means. At the inside of the door further key operable lock means (39, 40) are provided sokly to operate and, if required to the de-actuate the blocking means. A casting (38) secured in the casing mounts the further lock means (39, 40), provides pan-bearings (38b: 138b) for pivot rods (41, 43) of the handle (36) and a bolt locking element (44), provides a guide slot (138d) for a spring-likle connector (49) linking the handle to the bolt locking element, and provides a pair of arms (66) between which slides a bolt release member (69) and against which bears one end of a biasing spring around part of the bolt release member.

REFERENCES:
patent: 1393021 (1921-10-01), Huffman
patent: 2651934 (1953-09-01), Chesler
patent: 2700886 (1955-02-01), Welch
patent: 2966054 (1960-12-01), Muttart
patent: 3025096 (1962-03-01), Williams
patent: 3584483 (1971-06-01), Orr
patent: 3871198 (1975-03-01), Miller
patent: 4047408 (1977-09-01), Johns et al.
patent: 4064721 (1977-12-01), Morgan
patent: 4312205 (1982-01-01), Reed et al.
patent: 4563885 (1986-01-01), Madden
patent: 4594864 (1986-06-01), Hart
patent: 4709566 (1987-12-01), Wildenradt
patent: 4732418 (1988-03-01), Crown et al.
patent: 4841755 (1989-06-01), Weinerman et al.
patent: 5020343 (1991-06-01), Hart et al.
patent: 5113675 (1992-05-01), Uyeda
patent: 5791174 (1998-08-01), Fitzgerald et al.
patent: 5794467 (1998-08-01), Justice
patent: 2626307 (1989-07-01), None
patent: 2 134 960 (1984-08-01), None
patent: 2 142 688 (1985-01-01), None
patent: 2 268 221 (1994-05-01), None

Affiliated with

Also associated with

Rating

Lock does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lock, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lock will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3396659