Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Checks and closers – Pneumatic
Patent
1977-09-06
1978-03-21
Feldbaum, Ronald
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Checks and closers
Pneumatic
49449, 16 84, E05I 300
Patent
active
040794792
ABSTRACT:
A closure for sliding arcadia doors utilizes a pair of telescoping tubes biased to their telescoped or closed position by an internal interconnecting tension spring and employs a pneumatic system and a bleeder valve to control the rate of closing or telescoping of the tubes once they have been opened against the bias of the tension spring. A locking mechanism uses a locking bar and a pair of brackets, one connected to the corner of the door frame and the other mounted on the door for movement with it, (1) to lock the door closed, (2) permit the door to be opened using the door closer so that it is automatically closed by the closer, or (3) to permit the door to be used in its normal manner as if the door closer was not present.
REFERENCES:
patent: 533075 (1895-01-01), Mohn
patent: 1986948 (1935-01-01), Ulm
patent: 2835487 (1938-05-01), Clark
patent: 3278979 (1966-10-01), Clement
patent: 3698883 (1972-10-01), Fazio
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