Pump unit and hydrostatic transmission

Details Pump unit and hydrostatic transmission Pump unit and hydrostatic transmission

2007-06-19

2007-06-19

Lazo, Thomas E. (Department: 3745)

Power plants

Pressure fluid source and motor

Input pump and rotary output motor system having...

C060S488000

Reexamination Certificate

active

11269643

ABSTRACT:
There is provided a pump unit configured to be capable of transmitting a rotational power from a driving power source which is operatively connected thereto to an actuator through a pair of hydraulic fluid lines. The pump unit includes: an input shaft; a hydraulic pump main body; a PTO shaft; a PTO clutch mechanism; an auxiliary pump main body; a suction line; a discharge line; a charge line; a PTO hydraulic fluid line; a pressure-reducing valve; and a resistance valve. The PTO hydraulic fluid line and the charge line are fluidly connected to the primary side and a secondary side of the pressure-reducing valve, respectively.

REFERENCES:
patent: 5069037 (1991-12-01), Sakigawa et al.
patent: 6571894 (2003-06-01), Ishimaru et al.
patent: 6619038 (2003-09-01), Takada et al.
patent: 2003-291674 (2003-10-01), None

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