Patent ID: 7918317

Claim:
A lubricant dosing arrangement for the lubrication of valve shafts in the cylinder heads of piston engines, each valve including a valve shaft ( 1 ) longitudinally movably supported in bores ( 2 , 3 ) of the cylinder heads, and sealing means ( 4 , 5 a ) disposed in the bores ( 2 , 3 ) around said valve shaft ( 1 ) said sealing means ( 4 , 5 a ) including axially spaced annular first and second seals ( 4 , 5 a ; 5 , 5 b ) so as to form a lubricant reservoir (H 1 , H 2 ) the first seal ( 4 , 5 a ) being supported by the wall of the housing bore ( 3 ) and the second seal ( 5 , 5 b ) being supported by the valve shaft ( 1 ) so as to provide for a change of volume of the lubricant reservoir (H 1 , H 2 ) with an axial movement of the valve shaft ( 1 ), the second seal ( 5 , 5 b ) being designed to permit passage of lubricant in one direction of movement of the valve shaft for moving lubricant through the lubricant reservoir (H 1 , H 2 ) in a dosed manner depending on the lift movement of the valve shaft ( 1 ).