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:
Jun. 21, 2005
Filed:
Nov. 05, 2002
Tomohisa Kaneda, Mooka, JP;
Shuuji Hori, Oyama, JP;
Naoki Ishizaki, Tochigi, JP;
Yasuhiro Satou, Oyama, JP;
Masayoshi Mototani, Oyama, JP;
Tomohisa Kaneda, Mooka, JP;
Shuuji Hori, Oyama, JP;
Naoki Ishizaki, Tochigi, JP;
Yasuhiro Satou, Oyama, JP;
Masayoshi Mototani, Oyama, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
The present invention intends to provide a hydraulic signal output device having a smaller installation space, and thereby enabling to make an installation space of hydraulic machines in an operation room smaller and that of other than the hydraulic machines larger. In addition to this, the present invention intends to allow externally restricting an operation in the operation room. In order to attain the intentions, in a hydraulic signal output device of the present invention, a PPC valve, an EPC valve and a shuttle valve are integrally formed. In one invention, in addition to the above, a pressure oil output port in a pressure-reducing valve in the PPC valve is communicated with a pressure oil input port of a switching valve in an electromagnetic valve, and a pressure oil output port of the switching valve in the electromagnetic valve is communicated with a pilot pipe line.