Patent ID: 7892129
Filing Date: 2011-02-22
Classification: F16H

Abstract:
1. A transmission, comprising: a first transmission interface; a first set of power transmission members, said first set of power transmission members comprising a plurality of gears coupled at least indirectly to said first transmission interface, each of said plurality of gears having a circumference and a plurality of teeth spaced around a full length of said circumference, wherein each of said plurality of power transmission members is configured to travel along a respective orbital path, said orbital path extending fully around an axis that is external to each of said plurality of gears, and a length of each orbital path of said plurality of power transmission members being selectively variable such that a unique gear ratio is defined for each orbital path length; a second set of one or more power transmission members configured to mate with said plurality of gears of said first set of power transmission members, wherein said second set of one or more power transmission members includes one or more tooth engagement structures collectively configured to maintain substantially constant tooth engagement with said plurality of gears of said first set of transmission members; and a second transmission interface coupled to said second set of one or more power transmission members.