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. 31, 1995
Filed:
May. 10, 1994
NSK Ltd., Tokyo, JP;
Abstract
A drive shaft for an automotive vehicle water pump has an outer race with plural outer raceways formed in an inner peripheral wall thereof, a shaft member disposed for rotation relative to the outer race and defining a like plural number of inner raceways formed in an outer peripheral wall of the shaft member in radial registration with the corresponding outer raceways, and a multiplicity of rolling elements arranged between the inner raceways and the corresponding outer raceways, respectively. The shaft member comprises a large-diameter bearing portion with the plural inner raceways formed in an outer peripheral wall thereof, a small-diameter impeller shaft portion extending from one end of the large-diameter bearing portion, a small-diameter pulley shaft portion, and a continuously-connecting portion extending between an opposite end of the large-diameter bearing portion and a proximal end of the small-diameter pulley shaft portion. The continuously-connecting portion presents a curved peripheral surface with circular arcs in tangential directions of which an outer peripheral wall of the small-diameter pulley portion extends.