Tensioner with spring force control in a second bore
Patent No. 9,683,637
Issued: June 20, 2017
Term Extension: 179 Days
Inventors: Todd; Kevin B. (Freeville, NY), Smith; Dale N. (Freeville,
A tensioner for tensioning a chain span which uses two pistons. The movement of the two pistons may be coupled together. The first piston provides damping to the chain span and a second piston provides variable, dominant and automatically adjusting spring force to the chain span. The tensioner automatically adjusts the mean tension force to keep the chain tension as low as possible without sacrificing chain control, significantly improving drive efficiency at new chain conditions and conditions with dynamic loads.
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