Roll-up door

Details Roll-up door Roll-up door

1988-06-30

1989-12-19

Johnson, Blair M.

Flexible or portable closure, partition, or panel

Roll type

With fabric free edge connected operator

160310, A47G 502

Patent

active

048876607

ABSTRACT:
A lightweight, high speed roll-up door, or curtain, is unrolled from and rolled upon a cylindrical tube disposed above or within an opening in a wall by a drive motor/drive shaft combination coupled to one end of the tube. A non-rotating support shaft is attached to the other end of the tube which has disposed within respective ends thereof first and second coiled springs. A pair of belts are coupled to lower opposed ends of the door and are wrapped around respective pulleys positioned at each end of the tube and mounted to the drive and support shafts, respectively. With one end of each of the coiled springs coupled to the tube and each of the other ends respectively coupled to one of the pulleys, the coiled springs urge the two pulleys and the tube in opposite directions of rotation to maintain the door in a tightly stretched condition. Changes in the effective radius of each of the pulleys as the belts are unwound/wound as well as changes in the effective radius of the tube as the door is unwound/wound counterbalance the door's weight by compensating for changes in the weight of the withdrawn, or extended, portion of the door to ensure high speed door operation regardless of the length of door withdrawn from the tube.

REFERENCES:
patent: 5097 (1847-05-01), Cate
patent: 297163 (1884-04-01), Quigley
patent: 379614 (1888-03-01), Smith
patent: 455697 (1891-07-01), Wright
patent: 472832 (1892-04-01), Sweeney
patent: 640291 (1900-01-01), Forsyth
patent: 987654 (1911-03-01), Thompson
patent: 1088139 (1914-02-01), Fischer
patent: 1121898 (1914-12-01), Davis
patent: 1204436 (1916-11-01), Hawley
patent: 1355246 (1920-10-01), Myvalt
patent: 1513676 (1924-10-01), Skurniak
patent: 1545053 (1925-07-01), Kelly
patent: 1742437 (1930-01-01), Davenport
patent: 1828623 (1931-10-01), Sacerdote
patent: 1859209 (1932-05-01), Kohlsaat
patent: 2148983 (1939-02-01), Grubb
patent: 2564208 (1951-08-01), Michelman
patent: 2780283 (1957-02-01), Wasserman
patent: 2827117 (1958-03-01), Bateman
patent: 2839135 (1958-06-01), Anderson
patent: 2843201 (1958-07-01), Laubenthal
patent: 3050743 (1962-08-01), Lamb
patent: 3092170 (1963-06-01), Ellis
patent: 3180401 (1965-04-01), Gambon et al.
patent: 3211211 (1965-10-01), Youngs
patent: 3292685 (1966-12-01), Clark
patent: 3306344 (1967-02-01), Youngs
patent: 3306345 (1967-02-01), Youngs
patent: 3421568 (1969-01-01), Youngs
patent: 3430677 (1969-03-01), Pierce
patent: 3460602 (1969-08-01), Hugus
patent: 3583465 (1971-06-01), Youngs et al.
patent: 3734161 (1973-05-01), Pierce
patent: 3750740 (1973-08-01), Newman
patent: 3759568 (1973-09-01), Unruh
patent: 3842892 (1974-10-01), Stieler
patent: 3853167 (1974-12-01), Wardlaw
patent: 3878879 (1975-04-01), Manns
patent: 3981343 (1976-09-01), DeVito
patent: 4016920 (1977-04-01), Shepard
patent: 4178978 (1979-12-01), Burnham
patent: 4234033 (1980-11-01), Leivenzon et al.
patent: 4237956 (1980-12-01), Sivin et al.
patent: 4342354 (1982-08-01), Leivenzon et al.
patent: 4359846 (1982-11-01), Votteler
patent: 4392392 (1983-07-01), Perisic et al.
patent: 4452292 (1984-06-01), Leivenzon et al.
patent: 4467853 (1984-08-01), Downey, Jr.
patent: 4478268 (1984-10-01), Palmer
patent: 4665965 (1987-05-01), Pasquier et al.
patent: 4690194 (1987-09-01), Seuster

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