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. 24, 1989
Filed:
Jul. 05, 1988
Kyozaburo Furumura, Ninomiya, JP;
Nippon Seiko Kabushiki Kaisha, Tokyo, JP;
Abstract
A dynamic pressure type bearing comprising an outer cylindrical member made of metal and a thin walled inner cylindrical member made of synthetic resin and joined to the inner periphery of the outer cylindrical member. The inner periphery of the inner cylindrical member is formed with a plurality of grooves for generating dynamic pressure. The thin walled inner cylindrical member is joined to the inner periphery of the outer cylindrical member during the moulding time by a joining means. The method of making this bearing consists of the steps of: firstly, inserting an outer cylindrical member previously provided with suitable joining means into an outer mould; inserting an inner mould provided with projections into the outer mould; pouring or injecting molten synthetic resinous material into a gap formed between the outer cylindrical member inserted in the outer mould and the inner mould already placed in the outer cylindrical member; and allowing the poured resin material to solidify to form an inner cylindrical member integrally joined to the outer cylindrical member to constitute a composite bearing of laminated outer and inner cylindrical members. The composite bearing is removed from the moulds by moving it in an axial direction away from the moulds. Preferably, the synthetic resin for forming the inner cylindrical member is a thermosetting resin.