V-belt demonstrator device

• US 4,068,394 A
• Filed: 04/08/1977
• Issued: 01/17/1978
• Est. Priority Date: 04/08/1977
• Status: Expired due to Term

• Current Assignee: Dayco Products LLC
• Original Assignee: Dayco Europe Srl (Park-Ohio Holdings Corporation)
• Inventors: Sanna, Waldo A., Sand, Carl A.
• Primary Examiner(s): Skogquist, Harland S.
• Application Number:
  US05/785,159
• Time in Patent Office: 284 Days
• Field of Search: 35/49, 35/50, 73/9
• US Class Current: 434/367
• CPC Class Codes: G09B 25/02 of industrial processes; of machinery

Abstract

A device for demonstrating the coefficient of friction of a V-belt. Two dissimilar V-belt segments are secured together with a tension spring to form a continuous loop, the segments engaging aligned pulleys. Manual rotation of the pulleys applies frictional force to the side faces of the belt segments to indicate comparative slippage of each segment.

Claims

1. A device for demonstrating coefficient of friction of a V-belt comprising a pair of aligned grooved pulleys;

an assembly consisting of two dissimilar V-belt segments, a connector securing one end of each segment together, and a tension member securing the other end of each segment together;

said assembly passing around said pulleys so that each segment engages a different pulley, and means for rotating each of said pulleys to apply frictional forces to said segments whereby the comparative slippage between each pulley and its corresponding segment provides an indication of the relative frictional characteristics of said segments.

2. The device of claim 1 in which said segments have lateral driving faces frictionally engaging approximately 180°

of said pulley grooves.

3. The device of claim 1 including a supporting body, said pulleys being mounted on said body, and locking means also being mounted on said body, said connector engaging said locking means and providing a fixed reference point for said assembly.

4. The device of claim 1 in which said tension device applies a tension to said belt segments between 0.5 and 8.0 pounds per square inch.

5. The device of claim 4 in which said tension device is a spring.

6. A method of demonstrating coefficient of friction of a V-belt comprising the steps of assembling a segment of said belt with a segment of a dissimilar belt, engaging a pair of aligned grooved pulleys so that each segment engages a different pulley, rotating said pulleys to apply frictional forces to said segments, and moving one of said segments relative to the other to demonstrate comparative slippage between each pulley and its corresponding segment as an indication of relative frictional characteristics of said segments.

7. The method of claim 6 including the steps of frictionally engaging the grooves of said pulleys with lateral driving faces of said belt segments.

8. The method of claim 6 including the step of assembling a tension device with said segments.

9. The method of claim 8 including the steps of connecting one end of each segment by means of said tension device and connecting the other ends of each segment by means of a connector.

10. The method of claim 9 including the steps of mounting said pulleys on a supporting body, mounting a locking means on said body, and engaging said locking means with said connector to provide a fixed reference point for said assembly during rotation of said pulleys.