Hydraulic system for working machine
AssigneeKubota Corporation
InventorsYuji FUKUDA, Toshihiko TAKEMURA
Life of this patent
Estimating the term…
Abstract
A hydraulic system for a working machine includes a hydraulic pump to output an operation fluid, a hydraulic device to be operated by the operation fluid, an operation member to be operated, a first operation valve to regulate a pressure of the operation fluid in accordance with operation of the operation member, and a pressure supplying portion to supply a first counteracting pressure of the operation fluid against a first operation pressure, the first operation pressure being a pressure of the operation fluid regulated by the first operation valve.
Claims17
A hydraulic system for a working machine, comprising:
- a hydraulic pump to output an operation fluid;
- a hydraulic device to be operated by the operation fluid;
- an operation member to be operated;
- a first operation valve to regulate a pressure of the operation fluid in accordance with operation of the operation member;
- and
- a pressure supplying portion to supply a first counteracting pressure of the operation fluid against a first operation pressure, the first operation pressure being a pressure of the operation fluid regulated by the first operation valve.
A hydraulic system for a working machine, comprising:
- a hydraulic pump to output an operation fluid;
- a first hydraulic device to be operated by the operation fluid;
- an operation member to be operated;
- an operation valve having a rod to be moved depending on operation of the operation member, the operation valve being configured to change a pressure of the operation fluid based on movement of the rod;
- an electromagnetic valve to change the pressure of the operation fluid;
- and
- a changing portion having:
- a first state to allow any one of the operation valve and the electromagnetic valve to be activated;
- and
- a second state to allow both of the operation valve and the electromagnetic valve to be activated,
- the changing portion being configured to be selectively switched to the first state or the second state.
Dependencies are inferred from the claim text.