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. 13, 2010
Filed:
Aug. 20, 2007
Hiroichi Sakamoto, Inuyama, JP;
Hiroichi Sakamoto, Inuyama, JP;
Murata Kikai Kabushiki Kaisha, Kyoto-shi, JP;
Abstract
The present invention provides a linear motor mounted press machine that generate an optimum thrust for a press tonnage to perform different machining operations including one requiring a greater press tonnage and one requiring a high speed and a smaller press tonnage in an energy efficient manner. A linear motor mounted press machine includes a first linear motor, a second linear motorthat produces a thrust lower than or equivalent to that of the first linear motor, and a coupling switching mechanismthat releasably couples output shaftsof the first and second linear motortogether. A press toolis driven forward and backward by the output shaftof the second linear motor. Each of first and second linear motorsis a unit linear motor assembly having a plurality of unit linear motorsarranged around a press working axis center P. The number of the unit linear motorsof the second linear motoris the same as or smaller than that of the first linear motor