Energy saver sliding door closer including a valved weight

Details Energy saver sliding door closer including a valved weight Energy saver sliding door closer including a valved weight

1985-11-12

1987-03-17

Silverberg, Fred

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Closers

Weight

16 84, 49387, E05F 100

Patent

active

046495983

ABSTRACT:
An energy saver door closer for use with a sliding door. A long cylindrical housing is attached to one vertical edge of the sliding door, a weight is in the cylinder and a cable connects the weight over a pulley in the top of the cylinder to an anchor in the door jam. A seal surrounds the weight so that there is a sealing contact with the housing to form a pneumatic cylinder therein. The lower part of the cylinder is provided with passageways which lets air go in or out. The upper part of the weight is provided with a valve which is always biased to the opened position but is held closed so long as the cable is taut When the cable is loose, the valve opens and air can rush out and the door will close faster.

REFERENCES:
patent: 3334444 (1967-08-01), Hargrove
patent: 4003102 (1977-01-01), Hawks et al.
patent: 4126912 (1978-11-01), Johnson
patent: 4357732 (1982-11-01), Hickman

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