Movable or removable closures – With operator for movably mounted closure – Operating lever or link and closure swing about parallel axes
Patent
1987-01-29
1988-11-08
Dorner, Kenneth J.
Movable or removable closures
With operator for movably mounted closure
Operating lever or link and closure swing about parallel axes
49344, 49356, E05F 1510
Patent
active
047826282
ABSTRACT:
A housing and telescoping arm are supported by a shaft pivot pivotally mounted in the ground. The telescoping arm includes a rotating rod actuator journalled for rotation in a bearing mounted atop the shaft. The rod includes a threaded portion extending longitudinally from the shaft to the gate. A traveling tubular member is mounted concentrically with the rod and includes a block having a threaded bore for receiving the threads of the rod. The arm is connected to the gate through a pinned connection between one end of the traveling member and a lower rail of the gate. Relative rotation between the rod an the traveling member is prevented by the pinned connection. As a result, the traveling member extends outwardly and retracts inwardly in response to the counter-clockwise and clockwise rotation respectively of the rod. A motor and transmission for driving the rod in rotation are mounted in the housing along with a motor control circuit. The motor control circuit receives a start switch signal and shuts the motor off after the gate has swung to either the open or closed positions by receiving a stop signal from a limit switch. The direction of the motor is reversed each time a signal is received from a limit switch so that the gate is alternately opened and closed by the apparatus. The apparatus can be used in areas not supplied with commercial power, since it is battery powered. A solar cell panel recharges the battery so that a completely self-sufficient operation is provided.
REFERENCES:
patent: 425962 (1890-04-01), Stockton
patent: 2371336 (1945-03-01), Levan
patent: 2540538 (1951-02-01), Matchett
patent: 2911211 (1959-11-01), Umbricht
patent: 3500585 (1970-03-01), Vollmar
patent: 4403449 (1983-09-01), Richmond
patent: 4416085 (1983-11-01), Lybecker et al.
patent: 4638597 (1987-01-01), Lybecker
Anderson Gerald A.
Dorner Kenneth J.
O'Brien Anthony A.
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