Motor vehicles – Motor as source of power for other machine – Hydraulic drive to other machine
Reexamination Certificate
2005-01-04
2005-01-04
Dunn, David R. (Department: 3616)
Motor vehicles
Motor as source of power for other machine
Hydraulic drive to other machine
C180S324000, C060S468000, C414S723000
Reexamination Certificate
active
06837319
ABSTRACT:
A work machine is operably coupled to an interchangeable hydraulically-driven implement via at least one hydraulic line. When changing the hydraulically-driven implement, high pressure trapped within the hydraulic line may cause difficulties in disengaging the attached hydraulically-driven implement from a body of the work machine. The present invention relieves the pressure in the hydraulic line by energizing at least one electronically controlled valve while an engine of the work machine is inactive. The valve is operably coupled to an electrical actuator and is moveable between, at least, a first position and a second position. When the valve is in the first position, the hydraulic line is fluidly connected to a low pressure line. A control system includes a pressure release controller that is operably coupled to energize the electrical actuator and move the valve to the first position when the engine is inactive.
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Bell James M.
Dvorak Paul A.
Sporer Mark A.
Caterpillar S.A.R.L.
Charlton Diana L
Dunn David R.
Leill & McNeil
Roberson Keith P
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