Patent ID: 8272315

Claim:
A hydraulic pump apparatus comprising: a hydraulic mounting member having a first side and a second side opposite the first side; a first hydraulic pump driven by a first pump shaft and rotatably disposed on the first side of the hydraulic mounting member; a second hydraulic pump driven by a second pump shaft and rotatably disposed on the first side of the hydraulic mounting member; a drive housing mounted to the second side of the hydraulic mounting member to form a drive cavity; a first gear and a second gear disposed in the drive cavity, the first gear being mounted on and driven by the first pump shaft and the second gear being mounted on the second pump shaft and driven by the first gear; a charge plate engaged to the second side of the hydraulic mounting member adjacent the first gear and the second gear, whereby the first gear and the second gear act as a charge pump to the first hydraulic pump and the second hydraulic pump.