US 4,301,621 AGranted

Anti-closing device for doors which automatically open and close

AssigneeGebr. Bode GmbH & Co. KG

InventorHans-Hermann Houweling

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Abstract

Anti-closing device for use with automatically opening and closing doors or the like, having a reversing switch for the door drive and a flexible rope for actuating the switch, the rope being held vertically along the free edge of the door in spaced relation and resiliently tensioned under spring action. One end of the rope is operatively connected to the switch for actuating the switch upon a deflection of the rope. A plurality of sleeves are arranged in a vertical row on the flexible rope and the lower end of the rope is connected to the lowermost sleeve while the uppermost sleeve bears against a support secured to the door whereby the sleeves are pressed against one another by the tensioning of the rope. The end surfaces of the sleeves which face one another bear tightly against each other in the position of rest and have a substantially larger outside diameter than the flexible rope.

Claims18

Dependent claims

An anti-closing device for use with a powered door driven between open and closed positions for opening the door when in the course of being closed the door encounters an obstacle, said device comprising switch means having an actuated state for producing a signal to reverse a drive and open a closing door, a flexible pull means mounted in spaced relation in proximity to a free edge of the door and operatively connected to said switch means for operating the same when the door encounters an obstacle, a plurality of sleeves arranged in a row around said pull means and having adjoining edges in abutment with one another, and means applying tension to said pull means to hold the same in an initially taut state, said pull means being coupled to said sleeves such that when the door encounters the obstacle the sleeves pivot on one another and the pull means is deflected to actuate the switch means, said adjoining edges of said sleeves having outer diameters substantially greater than the diameter of the pull means.

Dependencies are inferred from the claim text.