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. 26, 2009
Filed:
Aug. 18, 2004
Kazuhiko Sueoka, Ageo, JP;
Yasuji Takada, Ageo, JP;
Kazuhiko Sueoka, Ageo, JP;
Yasuji Takada, Ageo, JP;
Fukoku Co., Ltd., Saitama-Ken, JP;
Abstract
There is disclosed a boot for a constant-velocity universal joint, in which a secondary molded portion including a thick portion is formed in a large-diameter side end portion of a primary molded member, and the boot is easily pulled out of a core mold. The boot is downsized and lightened to reduce costs. A manufacturing method includes: a step of forming a secondary molding spacebetween an inner peripheral surface of a large-diameter side end portionof the primary molded member and an outer peripheral surface of a core mold; a step of injecting a molten material into the secondary molding space to mold the secondary molded portion; and a step of integrally molding a secondary molded member on the inner peripheral surface of the large-diameter side end portion of the primary molded member to form a boot, moving a removable portionof a second mold sectionof the core moldwhich abuts on at least the end portion of the thick portion in the vicinity of the bellows portion in a central axial direction of the core mold to remove the removable portion from an undercut portionof a thick portionjust before separating the boot from the core mold, and separating the core moldfrom the bootin this state.