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. 06, 2004
Filed:
Sep. 11, 2001
Kiyoto Maruoka, Hyogo, JP;
Jun Nishibayashi, Hyogo, JP;
Sumitomo Rubber Industries, Ltd., Kobe, JP;
Abstract
In a viscoelastic characteristic value-measuring apparatus, using a split Hopkinson's bar, a first strain gauge ( ) and a second strain gauge ( ) are installed on an input bar ( ) which is hit with a impact bar. A third strain gauge ( ) and a fourth strain gauge ( ) are installed on an output bar ( ) which is connected with the input bar ( ) through a specimen ( ) put between the input bar ( ) and the output bar ( ). The length of the input bar is set to not less than 1000 mm nor more than 2500 mm. The length of said output bar is set to not less than 700 mm nor more than 2200 mm. The propagation speed of a strain in the input bar and the output bar is set to not less than 1200 m/s nor more than 1800 m/s.