Series Spring Blade Tensioner

Patent No. 8,057,333

Issued: November 15, 2011
Filed: March 30, 2007
PCT Filed: March 30, 2007
PCT No.: PCT/US2007/065567
371(c)(1),(2),(4) Date: October 06, 2008
PCT Pub. No.: WO2007/121068
PCT Pub. Date: October 25, 2007

Inventor: Haesloop; J. Christian (Ithaca, NY)
Assignee: BorgWarner Inc. (Auburn Hills, MI)


A blade tensioner includes a blade shoe assembly with parallel stacked flat springs that pivots at one end and is supported in series by a spring loaded ramp at the opposite end. Providing a spring loaded ramp in series reduces the overall stiffness of the tensioner which enables a more uniform tensioning load as the tensioner takes up chain slack due to elongation from wear.

Reference to Related Applications

This application claims an invention which was disclosed in Provisional Application No. 60/744,617, filed Apr. 11, 2006, entitled "SERIES SPRING BLADE TENSIONER". The benefit under 35 USC 119(e) of the U.S. provisional application is hereby claimed, and the aforementioned application is hereby incorporated herein by reference.


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