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:
Nov. 23, 1976
Filed:
Feb. 28, 1975
Mario Cicognani, Milan, IT;
Industrie Pirelli S.p.A., Milan, IT;
Abstract
A tension resistant structure for driving belts and driving belts containing the tension resistant structure are provided. The tensioning structure comprises laterally spaced cords which extend substantially parallel to the longitudinal axis of the belt, the cords contain only seven threads of the polyamide, polyester or rayon with at least six of the threads being helically twisted together and disposed concentrically about the longitudinal axis of the cord, the physical characteristics of the cords are such that p (1 + K) = Rd wherein p is the pitch of the spiral of each thread; d is the diameter of the thread; R is between 27.4 and 35.1 and K is 0 to 0.03 when the thread is rayon; 0.01 to 0.07 if the thread is polyester; and 0.01 to 0.1 if the thread is polyamide.