Receptacles – Closures – Motor driven
Patent
1986-08-28
1988-03-08
Hall, George T.
Receptacles
Closures
Motor driven
220 1T, 220260, 220335, B65D 5500, B65D 4324
Patent
active
047294906
ABSTRACT:
The automatic touch actuated door opener includes an elongated flexible tension member having one end connected to a door and the other end connected to a tension member take-up device. The door is biased to its closed position for maintaining tension in the tension member when the door is moved to its closed position. A switch in contact with the tension member senses decreased tension due to external touching pressure against the door and actuates the take-up device to automatically open the door. A time delay switch causes the take-up device to allow the door to return to its closed position after the preselected time interval. An alternate embodiment includes a pair of limit switches which are sequentially engaged and released in response to increased and decreased tension respectively in the tension member.
REFERENCES:
patent: 1886490 (1932-11-01), Lynch
patent: 2654117 (1953-10-01), Pattison et al.
patent: 2658231 (1953-11-01), Guttormsen
patent: 3219227 (1965-11-01), Deisner
patent: 3357133 (1967-12-01), Helsing
patent: 3749274 (1973-07-01), Mele et al.
patent: 3852592 (1974-12-01), Scoville et al.
patent: 3891115 (1975-06-01), Ono
patent: 4205483 (1980-06-01), Clark et al.
patent: 4375863 (1983-03-01), Kappler
patent: 4383721 (1983-05-01), Knaack et al.
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