Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – With mounting or supporting means
Patent
1977-10-28
1980-03-04
Caun, Peter M.
Flexible or portable closure, partition, or panel
Plural strip, slat, or panel type
With mounting or supporting means
160189, 160193, E05F 1516
Patent
active
041912373
ABSTRACT:
Garage door opener for simple installation and to fully actuate various counterbalanced doors of different makes with minimum mechanism, and to be packaged and sold as a compact kit. The opener is built around a short main drive shaft adapted to be coupled coaxially to the end of the door counterbalance shaft. The drive shaft is journalled in two frame side members and therebetween carries a worm gear and two friction drive disks spring-pressed against the gear to transmit limited drive torque therefrom to the shaft. The gear is driven by a worm on the shaft of a motor on a carrier which is slidable on the frame. A manual cam moves the carrier between a worm-engaged position for drive and a worm-disengaged position to release the door for manual operation. A threaded extension of the main shaft carries a pair of traveling nuts which actuate switches to limit door travel both directions. In one modification, the assembly is mounted on studs on a mounting plate and adjusted thereto to bring the drive shaft coaxial with the counterbalance shaft, and the two shafts are coupled. In a second modification, the assembly is cantilevered by its drive shaft on the counterbalance shaft and is stabilized in coaxial relation therewith by a torque-reaction bracket. Such bracket may include a torque-limiting switch operable to reverse the drive in response to excess torque. For most installations, a down-drive cable is added to the counter-balance mechanism and connected to positively move the door from open to closed position in response to down-drive rotation of the counterbalance shaft.
REFERENCES:
patent: 967856 (1910-08-01), Tappin
patent: 1458894 (1923-06-01), Schwarz
patent: 1662715 (1928-03-01), Morrow
patent: 1724995 (1929-08-01), Dautrick
patent: 1827433 (1931-10-01), Kendall
patent: 2070058 (1937-02-01), McCloud
patent: 2099191 (1937-11-01), Blogett
patent: 2882044 (1959-04-01), Ginte
patent: 3285634 (1966-11-01), Boyar
patent: 3364974 (1968-01-01), Wiegand
patent: 3921761 (1975-11-01), Votroubek et al.
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