Door chain lock and release system

Details Door chain lock and release system Door chain lock and release system

1975-10-06

1977-10-18

Hafer, Robert A.

Closure fasteners

Extension link

Chain

2923363, 70 93, E05C 1736

Patent

active

040543102

ABSTRACT:
A door security and release system wherein a door safety chain or similar linkage is tautly held in door securing condition against any efforts to release it from outside the door, with release means associated with the inside door operating member and adapted to be actuated by turning the door operating member.

REFERENCES:
patent: 2113104 (1938-04-01), Beaumont
patent: 2724257 (1955-11-01), Segal
patent: 3004419 (1961-10-01), Falk
patent: 3657908 (1972-04-01), Schwartz et al.

Affiliated with

Also associated with

Rating

Door chain lock and release system 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 chain lock and release system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Door chain lock and release system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1444126