Patent ID: 6790013
Filing Date: 2004-09-14
Classification: F01C,F04C

Abstract:
A lubricant pumping system for providing lubrication of an apparatus having a variable speed rotating shaft and an oil pressure circuit comprising:a first pump having a variable displacement capability which is variably adjustable in response to a control input; and a second fixed displacement pump operably connected to said variable speed rotating shaft, an output said second pump providing an actuation signal proportional to the speed of said variable speed rotating shaft, for varying the displacement of said first pump in response to the speed of said variable speed rotating shaft; wherein a portion of the output of said second pump is operable to be directed to an intake of said first pump for supercharging an input flow; wherein a portion of an output of said second pump is operable to be directed to a discharge of said first pump; wherein a portion of said output of said second pump is operable to be directed to an oil sump.