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Patent Searching and Data


Title:
METERLESS HYDRAULIC SYSTEM HAVING SHARING AND COMBINING FUNCTIONALITY
Document Type and Number:
WIPO Patent Application WO/2013/059110
Kind Code:
A3
Abstract:
A hydraulic system (72) is disclosed. The hydraulic system may have a unidirectional variable displacement first pump (76), a first hydraulic actuator (26) connected to the first pump via a closed-loop first circuit (74), a unidirectional variable displacement second pump (80), and a second hydraulic actuator (32) connected to the second pump via a closed-loop second circuit (78). The hydraulic system may also have a third pump (84) selectively connectable in closed-loop manner to the first or second circuits, and a first valve (94) disposed between the first hydraulic actuator and the first pump and configured to selectively direct fluid from the first circuit to the second and third pumps.

Inventors:
KUEHN JEFFREY L (US)
EDLER BRAD A (US)
PETERSON JEREMY T (US)
VERKUILEN MICHAEL T (US)
Application Number:
US2012/060207
Publication Date:
July 11, 2013
Filing Date:
October 15, 2012
Export Citation:
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Assignee:
CATERPILLAR INC (US)
International Classes:
F15B13/02; E02F9/22; F15B13/06; F15B21/08
Foreign References:
US4561249A1985-12-31
JPH11141504A1999-05-25
US20080314038A12008-12-25
JPS5754635A1982-04-01
US7578127B22009-08-25
Attorney, Agent or Firm:
TINKER, William R. et al. (Peoria, IL, US)
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