Endless belt power transmission systems or components – Control for variable input to output speed-ratio – Including separate belt on each of coaxial pulleys...
Patent
1997-01-03
1997-11-25
Graysay, Tamara L.
Endless belt power transmission systems or components
Control for variable input to output speed-ratio
Including separate belt on each of coaxial pulleys...
474 69, 474 84, 74 8921, 74 8922, 74 892, 1987501, F16H 900, F16H 2702, F16H 2902
Patent
active
056905670
ABSTRACT:
A transmission for reducing the pulley ratio between a drive shaft and a transmission shaft. The transmission is adapted to convert a higher speed rotary motion to a lower speed linear motion. The transmission has two pulleys rigidly mounted together on a shaft and the pulleys have a different number of teeth. A pair of belts are mounted on the drive shaft and a follower shaft, each one of the belts engages one of the transmission pulleys. One belt on the transmission shaft engages a pulley on the top of a first transmission pulley and another on the bottom of a second transmission pulley. When the drive shaft imparts motion to the belts, the belts move the transmission between the drive shaft and the follower shaft. By arresting the movement of one of the belts by a clutch/brake, the transmission can be converted into a two speed transmission. If the belts are independently driven, one each by two motors, the transmission becomes operable in an infinite number of pulley ratios. One particular application for this pulley transmission is in a carriage drive system for a Coordinate Measuring Machine.
REFERENCES:
patent: 5198736 (1993-03-01), Azuma et al.
patent: 5207115 (1993-05-01), Takei
patent: 5267478 (1993-12-01), Stridsberg
patent: 5517872 (1996-05-01), Anada
patent: 5528948 (1996-06-01), De Gelis
patent: 5539987 (1996-07-01), Zennyoji
patent: 5564309 (1996-10-01), Nakamura et al.
patent: 5611248 (1997-03-01), Peltier
DeNijs Jan F.C.
Lindner Matthias
Brown & Sharpe Manufacturing Company
Graysay Tamara L.
Hartmann Gary S.
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