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US 4,056,987 AGranted
Mechanism for parallel connection of infinitely-adjustable looping gearings
OwnerGeorges Hoffmanninventor
Life of this patent
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Abstract
A mechanism for the parallel connection of infinitely-adjustable looping gearings having planetary and/or differential gearings interconnected with the displaceable pulley halves and control threads that automatically adjust running differences between the different V-belt pulleys as well as providing a means for simultaneously changing the transmission ratio of several coaxially-mounted V-belt pulleys.
Claims11
A power transmission mechanism for the parallel connection of infinitely-adjustable pulleys with at least two belt pulleys mounted axially side by side on a common shaft comprising:
- at least two belt pulleys, each having at least one axially displaceable half which determines the effective pulley diameter;
- an equalizing mechanism comprising differential gearing means for automatically displacing said at least one displaceable half of a pulley to nullify any asynchronism occurring in the running of said pulley relative to the other of said at least two pulleys;
- said at least two belt pulleys being inter-connected via said gearing means coaxially in series with said shaft and being rotatable in relation to said shaft, and pairs of oppositely pitched screw threads operably connecting said displaceable pulley halves and said shaft for displacing said pulley halves whenever said pulleys commence to turn at different speeds.
Dependencies are inferred from the claim text.