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. 17, 1981
Filed:
Aug. 20, 1979
Applicant:
Inventor:
Robert R Peterson, Hudson, MA (US);
Assignee:
Barry Wright Corporation, Watertown, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C / ; F16C / ;
U.S. Cl.
CPC ...
308139 ; 308 / ; 308 26 ; 308 37 ;
Abstract
A frusto-conical laminated elastomeric bearing is provided wherein at least some of the layers are graded in composition so that they have a first relatively high modulus of elasticity at the inner circumstance, a second lower but still relatively high modulus of elasticity at the outer circumference, and a third still lower modulus of elasticity in an intermediate position between the inner and outer circumferences, with the grading being arranged so as to provide an optimum balance of strain distribution and spring rates consistent with bearing lifetime and reduced-torque considerations.