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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 11049635 B1

PDFFull Text
Date of Patent:
Jun. 29, 2021

Filed:

Mar. 03, 2016

Solenoid

Applicant:

Nachi-fujikoshi Corp., Tokyo, JP;

Inventor:

Takeshi Matsui, Toyama, JP;

Assignee:

NACHI-FUJIKOSHI CORP., Tokyo, JP;

Attorney:

Harness, Dickey & Pierce, P.L.C.

Primary Examiner:

Shawki S Ismail

Assistant Examiner:

Lisa N Homza

Int. Cl.
CPC ...
H01F 7/00 (2006.01); H01F 7/122 (2006.01); H01F 7/16 (2006.01); H01F 7/08 (2006.01); H01F 7/02 (2006.01); H01F 7/18 (2006.01);
U.S. Cl.
CPC ...
H01F 7/122 (2013.01); H01F 7/081 (2013.01); H01F 7/16 (2013.01); H01F 7/1615 (2013.01); H01F 7/02 (2013.01); H01F 2007/083 (2013.01); H01F 2007/1894 (2013.01);
Abstract

Provided according to the present invention is a solenoid with a built-in permanent magnet, with which it is possible to suppress an increase in the amount of magnetic flux that passes through the chuck part, even when the magnetic flux generated by a coil is greater than the magnetic flux of the magnet, and to reliably reduce attraction force. In this solenoid, a permanent magnet and a coil are both built into a cylindrical case having an opening part; the permanent magnet and the coil are both separated and arranged inside the case; a ring member is arranged adjacent to the permanent magnet; a movable iron core is inserted inside the coil; and between the movable iron core and the coil, a metal coil cover is provided so as to cover the coil. The distance d between the case inner wall and the ring member can also be in the range of 0.1-0.3 mm.

Find Patent Forward Citations

Matsui, Takeshi. (2021). Solenoid (U.S. Patent No. 11049635). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11049635

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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