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:
Jan. 26, 1988
Filed:
Nov. 05, 1986
Nobuyuki Yokoyama, Yamatokoriyama, JP;
Shigehiro Isshiki, Yamatokoriyama, JP;
Unitta Co., Ltd., Yamatokoriyama, JP;
Abstract
A toothed belt with improved durability, comprising: a back surface section and tooth section that are made of a hydrogenated acrylonitrile-butadiene copolymer (H-NBR) with a hydrogenation rate of 80% or more, a tooth cloth that covers said tooth section and tooth lands positioned between the adjacent tooth sections, said tooth cloth being made of industrial nylon raw fiber with a viscosity relative to sulfuric acid of 2.6 to 2.8, a tensile strength of 5 g/denier or more, and a fineness of single fibers of 5 denier or less, and a plurality of core fibers with a core diameter of 0.9 to 1.1 mm and a ratio of said core diameter to said tooth cloth thickness in the range of 1.8 to 5.0, said core fibers being made of glass fiber filaments with a first twist number of 1.7 to 2.6 twists/inch, and a final twist number of 1.8 to 2.3 twists/inch, twisted together.