Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Panel hangers – travelers and/or tracks – With flexible panel attaching means
Patent
1977-08-23
1978-10-17
Feldbaum, Ronald
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Panel hangers, travelers and/or tracks
With flexible panel attaching means
160201, E05D 1302
Patent
active
041200721
ABSTRACT:
Apparatus is provided for supporting and drivingly opening and closing an overhead single-panel door such as a garage door. The apparatus includes drive rollers protruding from the plane of the door at respective opposite upper corners thereof, which drive rollers are bearingly supported by a plate member attached to the door. These drive rollers are supported from underneath and in driving contact with fixed guide tracks arranged at the building accommodating the door. In order to insure continuous firm driving engagement of the drive rollers with the topside of the guide track, a bearing bracket is rotatably supported at the drive roller axles, which bearing bracket in turn supports a pair of counterpressure rollers engageable directly at the underside of the guide track. The counterpressure rollers are spaced from one another in the direction of travel of the guide roller at respective opposite sides of a line through the axle with the drive roller and extending downwardly, such that at least one of these counterpressure rollers is continuously in supporting backing engagement with the guide track so as to assist in assuring a firm driving contact between the guide rollers and the guide track. In preferred embodiments, an additional spring support system is provided between the drive roller and the bracket supporting the drive roller axle and the door, so as to provide an additional biasing force in the downward direction on the drive roller. In preferred embodiments, the guide track is constructed as a C-shaped cross-sectional member, and the bearing bracket includes an extension which protrudes over the top of the guide track as a safety measure to support the door in the event of an axle breakage or the like.
REFERENCES:
patent: 1985976 (1935-01-01), Clark
patent: 3169574 (1965-02-01), Behlen
patent: 3202415 (1965-08-01), Lodge
patent: 3412280 (1968-11-01), Moler
patent: 3484812 (1969-12-01), Holland
patent: 3552474 (1971-01-01), Finnegan
Feldbaum Ronald
Hormann KG Amshausen
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