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:
Jun. 25, 2013
Filed:
May. 13, 2009
Takuji Miyasaka, Komatsu, JP;
Hirohide Sato, Komatsu, JP;
Ryota Yoshimura, Komatsu, JP;
Masaya Nakagawa, Nomi, JP;
Eiji Doba, Komatsu, JP;
Hiroyuki Ito, Yokohama, JP;
Takeo Arikabe, Hiratsuka, JP;
Takuji Miyasaka, Komatsu, JP;
Hirohide Sato, Komatsu, JP;
Ryota Yoshimura, Komatsu, JP;
Masaya Nakagawa, Nomi, JP;
Eiji Doba, Komatsu, JP;
Hiroyuki Ito, Yokohama, JP;
Takeo Arikabe, Hiratsuka, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
In the die cushion device, a shock absorber device relieves shock between a cushion pad and a support section. The shock absorber device includes a damping section and an elastic section. The damping section generates reaction force in accordance with the relative speed of the cushion pad with respect to the support section. The elastic section generates reaction force in accordance with the relative displacement of the cushion pad with respect to the support section. The controller section controls a servomotor so that a speed difference between the speed of the slide member and the speed of the support section is set to be a predetermined target speed difference value that changes over time.