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:
Jul. 01, 1986
Filed:
Oct. 26, 1984
Romulus Racca, Weston, MA (US);
Barry Wright Corporation, Newton, MA (US);
Abstract
A spring for creating adjustable torsional resistance between two members which are pivotal relative to each other. The spring comprises a stack of axially aligned elastomer torsion rings (30). A locking ring (34) is secured to and separates adjacent torsion rings, one locking ring being associated with each torsion ring. The assembled stack is firmly attached to one of the pivotal members (14). There is connecting sleeve (46) engageable selectively with each locking ring and with the other relatively pivotal member. The number of torsion rings exposed to pivotal motion between the members to vary the torsional resistance of the spring is determined by engagement between the connecting sleeve and selected locking rings.