Chairs and seats – Collapsible chair; i.e. – relatively folding bottom – back,... – Laterally collapsible
Patent
1989-08-07
1991-04-09
Nicholson, Eric K.
Chairs and seats
Collapsible chair; i.e., relatively folding bottom, back,...
Laterally collapsible
292DIG21, 292177, E05C 706
Patent
active
050058819
ABSTRACT:
A locking mechanism to be applied to an inactive door of a set of active and inactive double doors coordinated so that the inactive door closes first relative to a frame followed by the closing of the active door. Adjustable drive means is employed capable of either lengthwise contraction upon the application of a force between first and second separated locations on the adjustable drive means exceeding a threshold value, or linear movement without substantial contraction upon the application of a force less than the threshold value. A door-lock actuating element is coupled to the adjustable drive means at the first location. A door-locking element is coupled to the adjustable drive means at the second location. The adjustable drive means, the door-lock actuating element, and the door-locking element are supported at an upper or lower corner of the inactive door. The door-lock actuating element projects into the closing path of the active door to operate the door-lock actuating element and the adjustable drive means to drive forcibly the door-locking element into a locking engagement when the drive means is subjected to less than the threshold force value. The adjustable drive means contracts in response to an obstruction which prevents the door-locking element from locking the door. A fire shield envelopes many of the operating components to prolong the integrity of the locking mechanism.
REFERENCES:
patent: 1338713 (1920-05-01), Toney
patent: 2202916 (1940-06-01), Mussa
patent: 2513483 (1950-07-01), Hempfling
patent: 2911249 (1959-11-01), Jewett et al.
patent: 3578369 (1971-05-01), Coopersmith
patent: 3582122 (1971-06-01), Foster
patent: 4005886 (1977-02-01), Lirette
patent: 4099753 (1978-07-01), Gwozoz et el.
patent: 4445717 (1984-05-01), Imhoff
patent: 4819976 (1989-04-01), Bert
Bailey Kevin L.
D'Hooge Richard E.
Douvas Augustus G.
Nicholson Eric K.
Rixson-Firemark Inc.
LandOfFree
Door locking mechanism 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 locking mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Door locking mechanism will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2029407