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:
Aug. 27, 2002
Filed:
Jul. 18, 2000
Applicant:
Inventors:
Assignee:
Teijin Seiki Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F15B 9/10 ;
U.S. Cl.
CPC ...
F15B 9/10 ;
Abstract
An electro-hydraulic servomotor includes: an electric motor ( ) which rotates a drive shaft ( ) in response to an inputted signal; a hydraulic motor ( ) which rotates an output shaft ( ) using hydraulic pressure of operation oil; a first geared shaft ( ) rotatable along with the output shaft ( ); a second geared shaft ( ) threadingly engaged with the drive shaft ( ) and meshed with the first geared shaft ( ); and a spool ( ) axially movable along with the second geared shaft ( ) depending on a rotational difference between the drive shaft ( ) and the first geared shaft ( ), to control supply and discharge of the operation oil to and from the hydraulic motor. ( ).