The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 06, 2001
Filed:
Dec. 03, 1998
Gregory P. Albert, Nazareth, PA (US);
David B. Stahlman, Bryan, OH (US);
Timothy R. Cooper, Titusville, NJ (US);
James P. Ryan, Jersey City, NJ (US);
Ingersoll-Rand Company, Woodcliff Lake, NJ (US);
Abstract
A rotational energy storage device or spring which includes a roller-cam assembly having a shaft, a ring rotatably disposed about the shaft, and at least one roller disposed between shaft and ring. The roller is configured such that, upon rotating the ring relative to the shaft, the roller interferes with the ring and the shaft to convert and effect storage of mechanical energy created by the relative rotation of the ring and the shaft. Preferably a plurality of spaced rollers are positioned between ring and shaft. A cam geometry which is symmetrical or asymmetrical is provided on the shaft, the ring, the roller, and combinations thereof. A rotational energy storage device having a back-up ring with alternating thin and thick cross-sectional areas is further provided which is indexed to provide regions of low and high stiffness regions against each roller.