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:
Nov. 22, 1994
Filed:
Jun. 28, 1993
Koichi Yokoyama, Matsuto, JP;
Sodick Co., Ltd., Kanagawa, JP;
Abstract
A downsized screw driving gear supports a heavy reaction force from a screw used in preplasticization type injection molding machine. Motor rotation is directly transmitted to the screw during plasticizing by a piston member. Reaction forces from the screw are supported with a thrust bearing arranged in a hydraulic chamber, while the radial load of the piston member is supported with bushes. Hydraulic pressure is supplied to the hydraulic chamber in the injection process to advance the screw with the piston member, disconnecting a path to the injection chamber. Oil supplied from the hydraulic chamber immerses the thrust bearing and penetrates to the sliding faces of the bushes.