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Title:
TECHNIQUE FOR CONTROLLING PUMPS IN A HYDRAULIC SYSTEM
Document Type and Number:
WIPO Patent Application WO/2011/031851
Kind Code:
A3
Abstract:
A hydraulic system includes a plurality of pumps that provide pressurized fluid to a plurality of hydraulic actuators some of which work more that others. That system is controlled by producing a usage value for each of the plurality of pumps which indicates an amount that the respective pump has worked. One of the pumps is assigned to each hydraulic actuator in response to the usage values. The pumps with lower usage values are assigned to hydraulic actuators which work more, so as to equalize the use of each pump. The assignment of pumps to hydraulic actuators changes with changes in the usage values for the plurality of pumps. When a given one of the plurality of hydraulic actuators is to operate, hydraulic fluid is routed from the assigned pump to that given one of the plurality of hydraulic actuators.

Inventors:
WEBER ROBERT (US)
CHMIEL WAYNE G (US)
PERUGINI DAVE L (US)
ONSAGER MICHAEL G (US)
HELFRICH JOSEPH (US)
Application Number:
PCT/US2010/048257
Publication Date:
July 21, 2011
Filing Date:
September 09, 2010
Export Citation:
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Assignee:
BUCYRUS INT INC (US)
WEBER ROBERT (US)
CHMIEL WAYNE G (US)
PERUGINI DAVE L (US)
ONSAGER MICHAEL G (US)
HELFRICH JOSEPH (US)
International Classes:
F15B13/044; E02F9/22; F15B13/02
Foreign References:
KR960041737A1996-12-19
JP2009167618A2009-07-30
KR100300305B12001-10-27
JP2003013866A2003-01-15
JP2000170687A2000-06-20
Attorney, Agent or Firm:
GROSSMAN, Barry, L. et al. (777 E. Wisconsin AvenueMilwaukee, WI, US)
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