Garage door opening and closing system

Details Garage door opening and closing system Garage door opening and closing system

1999-01-21

2000-03-28

Johnson, Blair M.

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

With mounting or supporting means

160209, 49199, E05D 1538

Patent

active

060418451

ABSTRACT:
A new and improved garage door opening and closing system comprising a lower bar pivotably connected to the upper extent of a garage door. An associated intermediate bar is coupled with respect to the lower bar. An upper bar has an upper end pivotably connected to a door actuator. A piston is mounted to the lower end of the upper bar. A cylindrical housing encompasses the piston. An apertured upper cap at the top end of the housing slidably receives the upper bar. An apertured lower cap is releasably secured to the upper end of the intermediate rod. An upper coil spring is mounted between the piston and the upper cap. A lower coil spring is located between the piston and the lower cap.

REFERENCES:
patent: 1641472 (1927-09-01), Brown
patent: 2567029 (1951-09-01), Sauter
patent: 3048385 (1962-08-01), Reynolds
patent: 3704548 (1972-12-01), Wiegleb
patent: 4018005 (1977-04-01), Harris
patent: 4231191 (1980-11-01), Ellmore
patent: 4597224 (1986-07-01), Tucker
patent: 4891908 (1990-01-01), Aquilina
patent: 5429170 (1995-07-01), Nogaki
patent: 5544691 (1996-08-01), Wandio

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