Kayaba Industry Company, Ltd.

Norikazu Ide

Tomoyuki Fujita

Hideyasu Ihira

Shinji Yakabe

Ryouichi Nagasaka

A vane pump of the present invention is provided with a bearing convex portion () disposed in such a way to be raised from the bottom of a concave portion () of a cover () to form a bearing hole () and fitted into a central bore () of a first side plate (), and a first locating pin () standing at the bottom of the concave portion (), penetrating through the first side plate () and inserted into a cam ring ().

Vane pump

A body boreformed in a bodyis closed with a cover, as well as a cam ringis incorporated into the body bore, and a rotoris arranged inside the cam ring. Vanesmove in and out along an inner surface of the cam ringwith rotation of the rotor. An iron reinforcing plateis interposed inside the body borebetween the cam ringand the cover

A spool bore () where a spool () slides, a concave portion () opened to the spool bore () and facing a return portopened to the spool bore (), and a land portion () disposed in an outer periphery of the spool () are provided. A width of the concave portion () and a width of the return port () each are greater than a width of the land portion () and a groove bottom () of the concave portion () is formed to be a flat plane generally in proportion to an axis line of the spool ().

Growing community of inventors

Tokyo, Japan

Norikazu Ide