Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – With mounting or supporting means
Patent
1989-04-11
1991-01-01
Ramirez, Ramon O.
Flexible or portable closure, partition, or panel
Plural strip, slat, or panel type
With mounting or supporting means
E05F 1100
Patent
active
049811657
ABSTRACT:
An overhead door mechanism with torsion type counterbalance springs includes a spring adjustment device comprising a housing suitable for attachment to a horizontal shaft and a gearing mechanism that allows angular adjustment of the attached end of the spring relative to the shaft. The gearing mechanism includes a toothed ring gear member adapted for connection to the spring and rotatably mounted in the housing. A threaded worm is also mounted in the housing so that it engages the teeth of the toothed member. Rotation of the threaded worm induces a corresponding rotation of the toothed member. The rotation, when conveyed to one end of a spring that is fixed at its other end causes the spring torsion to be altered without releasing the spring from retention by the adjustment mechanism.
REFERENCES:
patent: 1416071 (1922-05-01), Smurr
patent: 1926452 (1933-09-01), Norling
patent: 1933925 (1933-11-01), Norling
patent: 1943453 (1934-01-01), Norling
patent: 1968536 (1934-07-01), Norling
patent: 2072582 (1937-03-01), Douglas
patent: 2083467 (1937-06-01), Morris
patent: 2294360 (1942-09-01), Blodgett
patent: 2311703 (1943-02-01), Sihyonen
patent: 2520618 (1950-08-01), Winter
patent: 2660753 (1953-12-01), Moler
patent: 2749570 (1956-06-01), Alder
patent: 3635277 (1972-01-01), Bahnsen
patent: 3921761 (1975-11-01), Votroubek
patent: 4817927 (1989-04-01), Martin
Buenzli Randal J.
Miller Eugene J.
Millco Products, Inc.
Olson Robert A.
Ramirez Ramon O.
LandOfFree
Spring adjustment device for overhead doors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spring adjustment device for overhead doors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spring adjustment device for overhead doors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1991780