Automatic gate

Details Automatic gate Automatic gate

1982-09-24

1984-09-25

Downey, Kenneth

Movable or removable closures

Radiant energy control

49 49, 49141, 49334, E05F 1520

Patent

active

044729081

ABSTRACT:
An automatic gate arrangement has a hollow and tubular lower post part defining an upright post axis and fixed to one side of the path, an upper end wall transverse to the post axis, and lower fasteners releasably securing the upper end wall to the lower post part. A support fixed to the upper end wall extends upward along the post axis therefrom and pivotally supports a gate shaft at the post axis. A reversible drive motor fixed on and underneath the upper end wall in the lower post part has a rotary output extending through the upper end wall. A transmission between the rotary output and the shaft converts rotation of the output into oscillation about the post axis of the shaft. A C-shaped gate projects laterally from the post axis and is secured to the shaft by connecting means for joint rotation about the post axis unless the gate and shaft are relatively rotated about the post axis with a force exceeding a predetermined maximum force. A controller connected to the motor includes a proximity sensor upstream along the path from the post parts for operating the motor and oscillating the gate when a person is detected by the sensor. A hollow and tubular middle post part above the lower post part, centered on the post axis in axial alignment with the lower post part, and carried on the gate pivots therewith about the post axis. A hollow and tubular upper post part above the middle post part is centered on the post axis in axial alignment with the lower and middle parts. A rigid strut is fixed to the lower post part and support and lower fasteners secure the upper post part to the strut for relatively fixing the upper and lower post parts together.

REFERENCES:
patent: 4155199 (1979-05-01), Rubertus
patent: 4186521 (1980-02-01), Hunter
patent: 4232484 (1980-11-01), Buchmann
patent: 4290230 (1981-09-01), t'Kint de Roodenbeke

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