192 clutches and power-stop control – Clutch and brake – Automatic check and release
Patent
1994-07-08
1996-06-25
Lorence, Richard M.
192 clutches and power-stop control
Clutch and brake
Automatic check and release
192 8R, 477 9, 477 22, F16D 6702
Patent
active
055291570
ABSTRACT:
A brake and clutch assembly mounted on an electric motor's drive shaft comprises, in succession and outwardly from the motor, a brake pad, a drive disk, a clutch plate, a pulley, a compression spring and an end cap. The drive disk includes a sleeve with the clutch plate and the pulley being slidably mounted thereon. A pin extending diametrically through the shaft lies in a diametrical V-shaped recess defined in the drive disk. The spring biases the pulley, clutch plate and disk drive towards the brake pad thereby frictionally retaining the drive disk thereagainst when the motor is not operating and preventing the components from rotating. When the motor is started, the pin climbs out of the bottom of the recess by pushing the drive disk against the spring's force thereby axially displacing slightly the disk drive away from the brake pad such that the pin rotates the drive disk which frictionally drives the clutch plate and the pulley. Resistance applied against the rotation of the pulley causes the clutch plate to slip thereby allowing the pulley to stop while the clutch plate, the drive disk and the motor shaft continue to rotate, thus preventing damage to the motor. The friction forces between the clutch plate and the pulley are insufficient to stop the clutch plate and thus the drive disk and the motor shaft if the pulley is forced to stop rotating.
REFERENCES:
patent: 2408808 (1946-10-01), Paulus et al.
patent: 3108669 (1963-10-01), Ateliani
patent: 3667578 (1972-06-01), Johnson
patent: 3692161 (1972-09-01), Katsuren et al.
Lorence Richard M.
Manaras Auto Doors Inc.
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