Title: Friction drive transmission

Abstract: A rotary motion transmitting device including traction rollers for transmitting motion in either direction from an input shaft to an output shaft. One shaft carries an internal traction ring and the other shaft, whose axis is parallel to, but slightly spaced from, the traction ring shaft, extends into the traction ring and carries an inner roller to form a varying annular space. Three intermediate traction rollers are angularly disposed within this annular space and are urged into firm Hertzian contact with both the traction ring and the inner roller by means of the torque transmitted through the device. The five traction rollers have a sum of degrees of freedom of movement in a plane perpendicular to the axes of the rollers equal to 8, 9 or 10.

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Inventors: Nelson, Bertel S. (Naperville, IL, US)
Nelson, Woodrow D. (Lockport, IL, US)

Application Number: 550545
Filing Date: 1975-02-18
Publication_date: 1976-03-23
Assignee: Wedgtrac Corporation (Yorkville, IL)
Primary Class(es): 476/61 476/65, 476/67
Other Classes:
US Patent Ref:

1060865	May, 1913	Sundh	74/206.
1093922	Apr, 1914	Dieterich	74/206.
1212462	Jan, 1917	Donnelly	74/206.
3060767	Oct, 1962	Parrett	74/798.
3380312	Apr, 1968	Barske	74/206.
3776051	Dec, 1973	Kraus	74/206.
3848476	Nov, 1974	Kraus	74/206.

Other Refs:
Primary Examiner: Scott, Samuel
Assistant Examiner: Burke, A. Russell
Attorney: Oltsch & Knoblock