Tandem pump unit
AssigneeKanzaki Kokyukoki Mfg. Co., Ltd.
InventorsRyota Ohashi, Hironori Sumomozawa
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Abstract
The present invention provides a tandem pump unit that includes: a first hydraulic pump and a second hydraulic pump respectively having a first pump shaft and a second pump shaft respectively having adjacent ends connected together so that the first and second pump shafts are coaxially aligned and non-rotatably connected in tandem; a common housing for accommodating the first hydraulic pump and the second hydraulic pump; and a first center section and a second center section that respectively support the first and second hydraulic pumps.
Claims6
1-37. (canceled)
A pump unit for supplying oil to first and second hydraulic motors respectively connected to left and right drive wheels, comprising:
- a first hydraulic pump which includes a first pump shaft having a first end operatively connected to a power source and a second end opposite to the first end, the first hydraulic pump being fluidly connected to the first hydraulic motor through a first closed circuit;
- a second hydraulic pump which includes a second pump shaft having a first end operatively connected to the first pump shaft and a second end opposite to the first end, the second hydraulic pump being fluidly connected to the second hydraulic motor through a second closed circuit;
- a housing for accommodating the first and second hydraulic pumps;
- and
- a charge pump which is driven by the second end of the second pump shaft and which supplies pressure oil to both the first and second closed circuits.
Dependencies are inferred from the claim text.