Symmetrical traction drive
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United States of America Patent
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Dec 17, 2013
Grant Date -
Jun 28, 2012
app pub date -
Dec 23, 2011
filing date -
Dec 23, 2010
priority date (Note) -
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Abstract
Disclosed is a symmetrical traction drive that utilizes multi-diameter rollers having traction surfaces for transferring rotational mechanical energy between the shaft and a transfer gear. Multi-diameter rollers are mounted in carriers disposed between two substantially symmetrical ring gears. Sloped traction surfaces of the ring gears mate with inner traction surfaces on both sides of the multi-diameter rollers. Since force is applied to the inner traction surfaces on both sides of the multi-diameter rollers, forces are substantially equalized on each side of the multi-diameter rollers. An outer traction surface of the multi-diameter roller interfaces with a traction surface on the shaft. Speed reduction ratios of at least 20:1 or greater can be achieved. The high speed drive may include exhaust turbines, steam turbines, including a Tesla turbine or Schumacher turbine, compressors, combinations of turbines and compressors, high speed pumps, dentist drills, or other devices that operate with high rotational speed.
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