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. 16, 2002
Filed:
Apr. 18, 2000
Osamu Takahashi, Hyogo, JP;
Hiroshi Fujimoto, Hyogo, JP;
Bando Chemical Industries, Ltd., Hyogo, JP;
Abstract
In a V-ribbed belt, the dimension H from the rib-side end of a tension member to the bottom of a rib is set in the range of 1.0 to 2.0 mm to thicken the bottom side of the belt, thereby reducing a shock as caused when the belt vibrates and strikes a pulley. The dimension H from the rib-side end of the tension member to the top of the rib is set in the range of 3.0 to 4.0 mm or the belt with five ribs is set to exhibit a flexural rigidity of 39.2 N·cm or more when subjected to a flexural rigidity test, thereby enhancing the flexural rigidity of the belt. Alternatively, the belt with five ribs is set to exhibit a dynamic spring constant of 850 N/mm or more when subjected to a dynamic response test, thereby providing a sufficient dynamic spring constant to the belt. Alternatively, the belt with five ribs is set to exhibit a dynamic damping constant of 0.065 N·S/mm or more when subjected to the dynamic response test, thereby providing a sufficient dynamic damping constant to the belt. According to these settings, production of vibration and associated noise during the running of the V-ribbed belt can be suppressed without the need for tension management of the belt and provision of an idler pulley.