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:
Nov. 02, 2004
Filed:
Feb. 07, 2003
Applicant:
Inventors:
Assignee:
Shin Caterpillar Mitsubishi Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E02F 9/22 ;
U.S. Cl.
CPC ...
E02F 9/22 ;
Abstract
Hydraulic oil supplied from pumps ( ),( ) to an attachment actuator ( ) is controlled by attachment control valves ( ),( ). Hydraulic oil supplied from pumps ( ),( ) to other actuators ( ),( ),( ),( ) is controlled by other control valves ( ) through ( ). Control conditions for operating the attachment actuator ( ) alone and control conditions for operating the attachment actuator ( ) simultaneously with any of the other actuators ( ),( ),( ),( ) are discriminated by the pilot pressure sensors ( ),( ),( ),( ). Control characteristics of the attachment control valves ( ),( ) are controlled by a controller ( ) based on the discriminated control conditions.