Power plants – Pressure fluid source and motor – Having distinct cooling or lubricating structure
Reexamination Certificate
2006-08-03
2008-08-12
Lazo, Thomas E (Department: 3745)
Power plants
Pressure fluid source and motor
Having distinct cooling or lubricating structure
C060S329000
Reexamination Certificate
active
07409827
ABSTRACT:
There is provided a working vehicle including: a hydraulic pump unit including a hydraulic pump main body operatively driven by a driving power source, and a pump case accommodating the hydraulic pump main body and having an inner space capable of storing oil; a hydraulic motor unit spaced apart from the hydraulic pump unit so as to operatively drive a corresponding driving wheel, the hydraulic motor unit including a hydraulic motor main body fluidly connected to the hydraulic pump main body so as to form an HST in cooperation with the hydraulic pump main body, and a motor case accommodating the hydraulic motor main body and having an inner space capable of storing oil; an auxiliary pump unit including an auxiliary pump main body operatively driven by the driving power source; a circulation line for fluidly connecting the auxiliary pump main body, the pump case and the motor case so that at least a part of oil, which has been discharged from the auxiliary pump main body, returns to a suction side of the auxiliary pump main body through the inner spaces of the pump case and the motor case; and an oil cooler interposed in the circulation line so as to be positioned. between the auxiliary pump main body and the pump case or the motor case.
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Kiyooka Koji
Yasuda Toshifumi
Kanzaki Kokyukoki Mfg. Co. Ltd.
Lazo Thomas E
Sterne Kessler Goldstein & Fox P.L.L.C.
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