Drive for a door operator
OwnerLucio Lotznicker, Raymond R. Hawkins +3inventors
InventorsLucio Lotznicker, Raymond R. Hawkins, George Karban, Simon Leivenzon, Zvi Leivenzon
Life of this patent
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Abstract
A drive suitable for a door or gate operator mechanism has a motor (1) and a gear box (5). The gear box (5) has a drive disengaging means (29) therein which can be pulled by a chord (7) to effect drive engagement of the motor (1) with the gear box (5). When the chord (7) is next pulled drive disengagement of the motor (1) with the gear box (5) is provided. The arrangement permits a door or gate which is driven by the operator to be manually opened in the event of power failure. The mechanical advantage of the gearbox (5) and the motor (1) on the door or gate is such that the gate cannot be manually opened without the drive being disengaged.
Claims11
An improved drive comprising a motor means and a gear box means having an indexing drive disengaging means therein, said indexing drive disengaging means being operable to permit drive engagement of said drive gear box means with said motor means when indexed by movement in one direction and to permit drive disengagement of said drive gear box means with said motor means when next indexed by movement in the same direction, wherein rotating meshing drive members in said gear box means are relatively displaceable to each other along a central rotational axis of at least one of the rotating meshing drive members, in order to cause drive disengagement.
Dependencies are inferred from the claim text.