Blade tensioner with opposing spans

Patent No. 8,007,386

Issued: August 30, 2011
Filed: January 24, 2007

Inventors: Smart; Michael (Locke, NY)
Assignee: BorgWarner Inc. (Auburn Hills, MI)


A tensioner for tensioning a strand of chain between two sprockets including a tensioner body and a ramp fixed to ground. The tensioner body has an oval shape defined by first and second arcuately curved sides. Each side has a distal end, a proximal end, and a blade spring. The first and second arcuately curved sides are coupled together at the distal ends and pivotally attached to ground at the proximal ends. When the first arcuately curved side is in contact with the ramp, the second arcuately curved side is in contact with the chain strand, and the tensioner body is positioned relative to the ramp such that the blade springs of the tensioner body are compressed, a tensioning force is applied to the strand of chain.

Reference to Related Applications

This application is a continuation in part of copending parent application PCT/US2007/060945, filed Jan. 24, 2007, entitled, "Self-Energizing Brake For A Tensioner and copending parent application PCT/US2007/060947, filed Jan. 24, 2007, entitled, "Torque Biased Friction Hinge For A Tensioner". The aforementioned application(s) are hereby incorporated herein by reference.

This application also claims one or more inventions which were disclosed in Provisional Application No. 60/822,520, filed Aug. 16, 2006, entitled "Self-Energizing Brake For A Tensioner, Provisional Application No. 60/863,815, filed Nov. 1, 2006, entitled "Blade Tensioner With Opposing Spans" and Provisional Application No. 60/765,777, filed Feb. 7, 2006, entitled "Torque Biased Friction Hinge For A Tensioner". The benefit under 35 USC 119(e) of the United States provisional application is hereby claimed, and the aforementioned applications are hereby incorporated herein by reference.


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