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. 03, 1984
Filed:
Apr. 21, 1982
Tokuhito Hamane, Hirakata, JP;
Masaaki Tasai, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
An apparatus reduces the insertion-required force in a coil inserting apparatus. A coil and an insulating material piece are automatically inserted into the groove of a stator core by the operation of a coil pusher. A current flows from a piezo-electric element accommodated within the coil pusher, when insertion resistance applied upon the coil pusher has increased, through the relay solenoid valve to drive a hydraulic cylinder thereby raising the coil wrapping jig. When the insertion pressure has suddenly increased, the current stops to keep fundamentally the coil wrapping jig synchronous to the motion of the coil pusher.