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:
Oct. 15, 1991
Filed:
Nov. 05, 1990
Applicant:
Inventor:
Satoru Iwase, Obu, JP;
Assignee:
Aisan Kogyo Kabushiki Kaisha, Aichi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B / ;
U.S. Cl.
CPC ...
29888451 ; 29888452 ; 2988846 ; 1231 / ;
Abstract
A method of manufacturing a hollow engine valve includes the steps of inserting a core of free-cuting metal into a pipe material of heat-resistant steel to provide a shaping stock, shaping the shaping stock into a rough valve profile of a mushroom shape, subsequently forming a hole in a central portion of said rough valve profile by cutting, and sealingly plugging an open end of the hole close to the valve mushroom portion.
Iwase, Satoru. (1991). Method of manufacturing hollow engine valve (U.S. Patent No. 5056219). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5056219
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile