US Patent 8439808 Bicycle trainer with variable resistance to pedaling

The invention is a bicycle trainer to which a standard bicycle temporarily attaches for exercise and simulated rides. A lifting mechanism raises and lowers the front tire, and in preferred embodiments, a frame engages the rear tire to hold the rear tire in an elevated position against a resistance cylinder. The trainer includes support arms that connect to the bicycle and pivot the bicycle in an arcuate path back and forth in relation to a resistance cylinder. The resistance cylinder can thereby vary resistance against back tire revolution.