Patent ID: 6672843
Filing Date: 2004-01-06
Classification: F04B,F16H

Abstract:
A pump apparatus driven by a prime mover, comprising(a) a housing having a first side and a second side opposite the first side, said housing comprising a pump chamber; (b) first and second hydraulic pumps mounted in said pump chamber; (c) a first input shaft drivingly engaged to said first hydraulic pump and having a proximal end extending from said first side of said housing, where said proximal end is driven by said prime mover, and a distal end; (d) a second input shaft mounted in said housing and having a proximal end and a distal end, said second input shaft drivingly engaged to said second pump and receiving a motive force from said first input shaft; (e) wherein said distal ends of said first input shaft and said second input shaft extend from said second side of said housing; (f) a first charge pump engaged to and driven by said distal end of first input shaft and a second charge pump engaged to and driven by said distal end of said second input shaft; and (g) an auxiliary pump mounted on said first side of said housing and driven by said first input shaft, wherein said first input shaft has a first portion having a diameter D1 and a second portion having a diameter D2, where D1 is greater than D2, and said auxiliary pump is engaged to and driven by the first portion of said first input shaft and said first hydraulic pump is engaged to and driven by said second portion of said first input shaft.