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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.:

US 12741405 B1

PDFFull Text
Date of Patent:
Sep. 22, 2026

Filed:

Mar. 31, 2023

Motor core manufacturing device and motor core manufacturing method

Applicant:

Nhk Spring Co., Ltd., Yokohama, JP;

Inventors:

Makoto Ohmori, Yokohama, JP;

Kei Sato, Yokohama, JP;

Takumi Furuya, Yokohama, JP;

Jun Kinoshita, Yokohama, JP;

Asuka Kawasaki, Yokohama, JP;

Assignee:

NHK SPRING CO., LTD., Yokohama, JP;

Attorney:

Knobbe, Martens, Olson & Bear, LLP

Primary Examiner:

Leo B Tentoni

Int. Cl.
CPC ...
B29C 45/02 (2006.01); B29C 45/04 (2006.01); B29C 45/14 (2006.01); B29C 45/47 (2006.01); B29C 45/53 (2006.01); B29C 45/54 (2006.01); B29C 45/72 (2006.01); B29C 45/73 (2006.01); H02K 15/02 (2025.01); H02K 15/035 (2025.01); B29K 705/12 (2006.01); B29L 31/00 (2006.01);
U.S. Cl.
CPC ...
B29C 45/14639 (2013.01); B29C 45/0441 (2013.01); B29C 45/045 (2013.01); B29C 45/14598 (2013.01); B29C 45/542 (2013.01); B29C 2045/14877 (2013.01); B29K 2705/12 (2013.01); B29K 2995/0008 (2013.01); B29L 2031/749 (2013.01); B29L 2031/7498 (2013.01);
Abstract

A motor core manufacturing device includes: a mold that holds a motor core including a resin filling portion; a chamber communicating with a resin composition filling path, wherein the resin composition filling path is formed in the mold and has one end portion communicating with the resin filling portion; a plunger that conveys a resin composition conveyed to the chamber toward the resin composition filling path; a first heater that is disposed in the mold, or in the mold and around the chamber; and an extruding machine that conveys the resin composition while kneading the resin composition toward the chamber in order to put a previously measured amount of the resin composition into the chamber.

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