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:
Sep. 08, 1998
Filed:
Dec. 28, 1995
Yoshiharu Inaba, Kawasaki, JP;
Yasushi Ishikawa, Yamanashi, JP;
Susumu Ito, Yamanashi, JP;
Koichi Nishimura, Yamanashi, JP;
Fanuc Ltd, Yamanashi, JP;
Abstract
A driving apparatus for an electrically-operated injection molding machine not requiring any bearing nor any connector. An electric motor having a rotor shaft on which a ball screw is integrally formed is mounted on one of a cross-head and a rear platen of a clamping mechanism, while a ball nut threadedly engaged with the rotor shaft is fixed to the other of the cross-head and the rear platen to constitute the driving apparatus for linearly moving the cross-head. As the ball screw is integrally formed on rotor shaft, any connector for connecting these two members is unnecessary. As the ball screw is directly rotated by the motor positioned coaxially with the ball screw, any bearing for bearing a redial force acting on the ball screw and rotor shaft. The apparatus may also be applied to an ejection mechanism, an injection mechanism and a nozzle touch mechanism of the electrically-operated injection molding machine.