F - Mech Eng,Light,Heat,Weapons – 16 – D
Patent
F - Mech Eng,Light,Heat,Weapons
16
D
74/178, 192/32
F16D 71/00 (2006.01) A01B 61/00 (2006.01) E05F 15/00 (2006.01) F16H 35/10 (2006.01) H01H 35/00 (2006.01)
Patent
CA 1312746
"LOAD SENSING GEARBOX" Abstract A universal load sensing gearbox integrating a safety mechanism for use, for instance, with motor driven closures, such as garage doors, barriers and gates, includes a housing which encases a worm slidably mounted on an input shaft and adapted for rotation therewith. The input shaft is connected with the motor driving the closure. The worm is engaged with a worm gear which is mounted on an output shaft which is connected with the closure. Dished washers are provided generally around the input shaft at both ends of the worm to urge the worm in a central meshed engagement with the worm gear. A motion transmission device is provided on the worm and is adapted to slide therewith to detect a longitudinal movement thereof and to transmit this movement to an actuating device which is adapted to stop and/or reverse the motor. Therefore, sufficient resistance to the rotation of the output shaft resulting, for example, from the closure encountering an object pressure, causes the worm to be displaced along the input shaft against the dished washers along with the transmission device. A sufficient movement of the transmission device causes the actuating device to trip a limit switch which triggers the stoppage and/or reversing of the motor. The load sensing gearbox is also intended for agricultural applications using reducing gearboxes, for actuating aircraft wing flaps, for conveyer belts, etc.
605064
Manaras Auto Doors Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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