Patent ID: 6468028
Filing Date: 2002-10-22
Classification: F04D,F05B,F16C,F16J,F16N

Abstract:
A vertical pump comprising:a rotatable shaft normally oriented in an approximately vertical manner; a first bearing structure supporting said shaft; a second bearing structure supporting said shaft, said second bearing structure being normally located entirely at an elevation above said first bearing structure; an oil reservoir chamber located at an elevation below each of said first and second bearing structures; an impeller affixed to said shaft for rotation therewith within said oil reservoir chamber; and said impeller including means for pumping oil from said oil reservoir chamber through at least a first passageway so that the pumped oil is reintroduced at an elevation above at least one of said first and second bearing structures; and wherein said impeller includes means for pumping oil out of said oil reservoir chamber through said first passageway and a second passageway so that oil that exits said chamber via said first passageway is reintroduced at an elevation above an elevation where oil that exits said chamber via said second passageway is.