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. 12, 2009
Filed:
Aug. 18, 2004
Kazuhiko Sueoka, Ageo, JP;
Yasuji Takada, Ageo, JP;
Kazuhiko Sueoka, Ageo, JP;
Yasuji Takada, Ageo, JP;
Fukoku Co., Ltd., Ageo-shi, 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 on an inner peripheral portion of a large-diameter side end portion formed as a primary molded member and in which a material in secondary molding is prevented from leaking. A manufacturing method includes: a step of forming a secondary molding space between a large-diameter side end portion inner peripheral surface of the primary molded member and an outer peripheral surface of a core mold; and a step of injecting a molten material into the secondary molding space to mold the secondary molded portion. The step of molding the secondary molded portion includes the steps of: applying a pressure of the molten material injected into the secondary molding space to a tapered surfaceextending toward the large-diameter side end portion from a small-diameter portionjust in the vicinity of a large-diameter side end portionexpanding the tapered surface toward the small-diameter portion, and pressure-welding the small-diameter portionheld between the inner peripheral surface of a divided moldand the outer peripheral surface of a core moldonto the core mold outer peripheral surface.