Endless belt power transmission systems or components – Means for adjusting belt tension or for shifting belt,... – Guide roll mounted for movement of its axis along arcuate...
Patent
1987-08-31
1988-11-01
Bui, Thuy M.
Endless belt power transmission systems or components
Means for adjusting belt tension or for shifting belt,...
Guide roll mounted for movement of its axis along arcuate...
56 166, 474135, F16H 712
Patent
active
047816651
ABSTRACT:
A first pulley is coupled by a flexible belt to a second pulley for delivering power from a source to a driven device. An idler pulley is urged against the belt to create tension therein. A cam, coupled for swinging movement to the idler pulley, faces against a cam guide in a manner to vary the spacing between the guide and the idler pulley in correspondence with the amount of swinging movement. A spring secured to the cam nudges the latter in a direction to incrementally increase the spacing between the guide and the pulley in order to maintain a pre-selected degree of tension in the belt upon the occurrence of a surge in power delivered from the source to the driven device with consequent incremental permanent stretching of the belt.
REFERENCES:
patent: 3762229 (1973-10-01), Johnson
patent: 4589249 (1986-05-01), Walker et al.
Bui Thuy M.
Drake Hugh H.
Walker Manufacturing Company
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