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:
Oct. 13, 2015
Filed:
Jun. 26, 2012
Eiji Douba, Komatsu, JP;
Hisanori Takeuchi, Nomi, JP;
Hiroshi Kinoshita, Komatsu, JP;
Hirohide Sato, Komatsu, JP;
Eiji Douba, Komatsu, JP;
Hisanori Takeuchi, Nomi, JP;
Hiroshi Kinoshita, Komatsu, JP;
Hirohide Sato, Komatsu, JP;
KOMATSU INDUSTRIES CORP., Ishikawa, JP;
Abstract
A press machine includes a controller including a top-dead-center detector adapted to: rotate a main shaft in a predetermined direction selected from a normal rotation direction and a reverse rotation direction to place a slide at a first position displaced relative to a top dead center of the slide by a predetermined height; while outputting and counting pulses from an angle detector, rotate the main shaft in a direction opposite to the predetermined direction to move the slide to a second position located at the same height as the first position beyond the top dead center; and rotate the main shaft from the second position in the predetermined direction by an amount corresponding to a half of the counted pulses to detect the top dead center.