Automatic door operator

Details Automatic door operator Automatic door operator

1975-09-08

1977-09-06

Kannan, Philip C.

Movable or removable closures

With operator for movably mounted closure

Coaxial of closure pivot

E05F 1512

Patent

active

040459144

ABSTRACT:
A door operator of electromechanical character for utilization with pivotally mounted doors, as by a center pivot, a butt hinge, or an offset pivot, comprising a prime mover, a driving shaft, adapted for rotation about a vertical axis and being secured through an arm to the door to be operated. A gear train interconnects said prime mover and said driving shaft wherein the gears are mounted as by a unique arrangement of needle roller and needle thrust bearings to permit said gear train to operate smoothly in door opening operation as a speed reducer and in door closing operation as a gear increaser. Energy storing means operatively connected to said driving shaft for storing energy during door opening operation and for energy releasing to drive said gear shaft during door closing operation. The said operator is adapted for compact disposition within the header of a door frame.

REFERENCES:
patent: 3425161 (1969-02-01), Catlett et al.
patent: 3457674 (1969-07-01), Catlett et al.

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