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. 10, 2004
Filed:
Nov. 07, 2002
Youji Asano, Gifu, JP;
Nobuaki Shimizu, Gifu, JP;
TS Corporation, Tokyo, JP;
Abstract
There is provided an electrohydraulic motor that has a spool valve for switching from each of drive positions ( ), in each of which a corresponding one of a main oil passage and a return oil passage is connected to a hydraulic actuator , to a neutral position, in which the hydraulic actuator and each of the main oil passage and the return oil passage are disconnected, and vice versa. There is also provided a connection switch valve , which is connected to the main oil passage and the return oil passage , for changing the connection between the main oil passage and the return oil passage in the neutral position . In response to an operation of the spool valve , the connection switch valve connects the main oil passage to the return oil passage in the neutral position and also disconnects the main oil passage from the return oil passage in the drive positions ( ).