Garage door operator

Details Garage door operator Garage door operator

1976-07-14

1978-03-07

Scott, Samuel

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

160188, F16H 2702

Patent

active

040772683

ABSTRACT:
A long horizontal tubular housing for a garage door operating screw is provided in its bottom with a slot extending lengthwise of the housing. Inside the housing there is a metal tube that is several feet long and that can be rotated by reversible means at one end of the housing. Wound helically around the tube and welded to it is a wire that forms a screw thread that is spaced from the surrounding tube and is encircled by a traveling nut for movement lengthwise of the housing when the tube is rotated. The nut is connected to means extending down through the slot for connection to a garage door to open or close the door. Since the space between the screw thread and the surrounding housing is empty except for the nut, the wire-wound portion of the tube is unsupported between the nut and the bearings for the tube. However, due to the light weight of the screw, it can be driven at least as fast as conventional door-opening screws without bending.

REFERENCES:
patent: 2882045 (1959-04-01), Moore
patent: 2883183 (1959-04-01), Finsterwalder et al.
patent: 3475705 (1969-10-01), Lindemann

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