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:
Apr. 02, 2013
Filed:
Feb. 21, 2008
Applicants:
Yasuhiro Kamoshida, Chikusei, JP;
Kyouji Uranaka, Yokohama, JP;
Masaru Shizume, Mooka, JP;
Inventors:
Assignee:
Komatsu Ltd., Tochigi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16D 31/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A rotation control system of a hoist pump includes: the hoist pump (); an engine () for driving the hoist pump (); a working equipment driven by a hydraulic cylinder that is extendable by hydraulic oil delivered through the hoist pump (); a hydraulic oil tank that stores the hydraulic oil supplied to the hoist pump () and receives the hydraulic oil returned from the hydraulic cylinder; and a controller () that controls a rotation speed of the hoist pump () to be an allowable rotation speed that is set in advance for preventing cavitation while the hydraulic cylinder is operated.