| 摘要 |
A brake mechanism for a tractor comprising an air tank containing compressed air, a brake valve connected to said air tank, a brake pedal operatively connected to said brake valve, a pair of solenoid operated selector valves, a pair of throttle valves each being connected to said one of the selector valves, respectively, a pair of double check valves each being connected to said one of the selector valves at one end thereof, the other end of which being connected to said one of the throttle valves, respectively, two pairs of brake chambers each being connected to one of said double check valves, respectively, and a switch connected to said selector valves.
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