Patent ID: 6487856
Filing Date: 2002-12-03
Classification: F04B,F16H

Abstract:
A tandem pump unit comprising: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 said first and second pump shafts are coaxially aligned and non-rotatably connected in tandem; a common housing for accommodating said first hydraulic pump and said second hydraulic pump; a first center section and a second center section for respectively supporting said first hydraulic pump and said second hydraulic pump; said common housing having a first opening and a second opening respectively formed at opposed ends of said housing with respect to the pump shaft direction, and a bearing wall located between said first and second openings, said first and second openings allowing said first and second hydraulic pumps to pass therethrough; said first and second center sections being respectively connected to said housing so as to seal said first and second openings, with said first and second hydraulic pumps respectively supported by said first and second center sections; and said adjacent ends of said first and second pump shafts being supported by the bearing wall of the housing.