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:
May. 28, 2002
Filed:
May. 30, 2000
Takayuki Kato, Kariya, JP;
Masato Takamatsu, Kariya, JP;
Seiji Katayama, Kariya, JP;
Shigeo Fukushima, Kariya, JP;
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, JP;
Abstract
Method of producing a blank for manufacturing a single-headed piston having a head portion and a neck portion formed integrally with the head portion, for engagement with a drive member, the method including: a step of manufacturing a body member including a twin neck section and two cylindrical hollow head sections formed integrally with the twin neck section so as to extend from opposite ends of the twin neck section, the twin neck section consisting of two portions which are mutually integrally formed in series with each other and which correspond to the neck portions of respective two single-headed pistons, each hollow head section being open at at least one of opposite ends thereof which is remote from the twin neck section; a step of manufacturing two closing members each for closing an open end of the corresponding hollow head section; and a step of fixing each closing member to the body member, so as to close the open end of the corresponding hollow head section.