Cylindrical dynamic pressure bearing formed of polyphenylene sulfide resin including glass fibers
AssigneeKoyo Seiko Co., Ltd.
InventorsTakeshi Takahashi, Masayoshi Onishi
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Abstract
A dynamic pressure bearing has a cylindrical configuration and includes dynamic pressure generating grooves on its inner peripheral surface. The bearing which is injection-molded is made of a material consisting principally of a polyphenylene sulfide resin including glass fibers. Furthermore, the bearing has an outside diameter R and an inside diameter r set such that a ratio R/r of the outside diameter R to the inside diameter r falls within a range of 1.2.ltoreq.R/r.ltoreq.2.5. The bearing also has an axial length L satisfying L.ltoreq.3r.
Claims3
A dynamic pressure bearing having a cylindrical configuration and including dynamic pressure generating grooves on an inner peripheral surface thereof, wherein said dynamic pressure bearing is made of a material consisting principally of a polyphenylene sulfide resin including glass fibers and wherein said dynamic pressure bearing has an outside diameter R and an inside diameter r set such that a ratio R/r of the outside diameter R to the inside diameter r falls within a range of 1.2.ltoreq.R/r.ltoreq.2.5, and also has an axial length L satisfying L.ltoreq.3r.
Dependencies are inferred from the claim text.