Door lock having reinforced strength

Details Door lock having reinforced strength Door lock having reinforced strength

2008-09-30

2008-09-30

Barrett, Suzanne D (Department: 3673)

Locks

Operating mechanism

Key

C070S369000, C070S375000, C070S417000

Reexamination Certificate

active

11333674

ABSTRACT:
A door lock includes a support seat having a recess for mounting a driven member, a control knob including a drive member rotatably mounted in the support seat to rotate the driven member and a rotation member to rotate the drive member and having an outer wall formed with an annular groove and a locking groove, and a locking pin mounted in the support seat and having a locking end selectively extended into the annular groove or the locking groove of the rotation member of the control knob. Thus, the door lock has a dead locking function to lock the door from inside to prevent the door from being unlocked from outside by a key or other tool so as to protect the user's safety inside of the door.

REFERENCES:
patent: 3293892 (1966-12-01), Falk
patent: 4195504 (1980-04-01), Foshee
patent: 4292824 (1981-10-01), Keller
patent: 4522048 (1985-06-01), Davis
patent: 4587816 (1986-05-01), Garcia
patent: 4603566 (1986-08-01), Kruehn et al.
patent: 4679418 (1987-07-01), Allen
patent: 5479801 (1996-01-01), Keller
patent: 5666835 (1997-09-01), Keller
patent: 5839305 (1998-11-01), Aston
patent: 5893282 (1999-04-01), Runge et al.
patent: 5921122 (1999-07-01), Lin
patent: 6508088 (2003-01-01), Barbier et al.
patent: 6604394 (2003-08-01), Davis
patent: 6606890 (2003-08-01), Widen
patent: 6718806 (2004-04-01), Davis
patent: 6889533 (2005-05-01), Fuller
patent: 7059160 (2006-06-01), Keller
patent: 2004/0040355 (2004-03-01), Goldman
patent: 2005/0034496 (2005-02-01), Fuller
patent: 2006/0283218 (2006-12-01), Dolev

Affiliated with

Also associated with

Rating

Door lock having reinforced strength does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3933311