Torsion spring powered door

Details Torsion spring powered door Torsion spring powered door

1987-01-28

1989-02-14

Sakran, Victor N.

Supports: cabinet structure

Show-case type

With closure

312319, 220348, A47B 9500

Patent

active

048042382

ABSTRACT:
An access door has a frame formed with longitudinally extending channels which receive a closure element for sliding therealong. A torsion spring secured to the frame and to the closure element maintains the closure element in an open or closed position.

REFERENCES:
patent: 1597878 (1926-08-01), Goldsmith
patent: 2038035 (1936-04-01), Friedrich
patent: 2313428 (1943-03-01), Glenn
patent: 2477069 (1949-07-01), Larson
patent: 2531737 (1950-11-01), Lyon, Jr.
patent: 2600345 (1952-06-01), Venditti
patent: 2884157 (1959-04-01), Lampkin
patent: 3913784 (1975-10-01), Ayres
patent: 3938690 (1976-02-01), Butler
patent: 4192422 (1980-03-01), Kotyuk

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