Patent ID: 8322930

Claim:
A washer, comprising: a central axial hole ( 1 ); a first oil retainer ( 2 ) having a front, a back, and a first diameter; a second oil retainer ( 3 ) having a second diameter; a transition groove ( 5 ); a first flange ( 6 ); a second flange ( 7 ); and at least one oil-storage groove ( 4 ); wherein: said central axial hole ( 1 ) allows a motor shaft to pass therethrough; said first oil retainer ( 2 ) is formed on one side of said washer; said oil-storage groove ( 4 ) is disposed on said front; said second oil retainer ( 3 ) is disposed at said back; said second diameter is greater than said first diameter; said transition groove ( 5 ) is an annular groove and is disposed between said first oil retainer ( 2 ) and said second oil retainer ( 3 ); said first flange ( 6 ) axially extends from said first oil retainer ( 2 ); and said second flange ( 7 ) axially extends from said second oil retainer ( 3 ).