Patent ID: 7900748

Claim:
A lubrication system comprising: a sleeve defining at least one fluid inlet aperture in fluid communication with a fluid source for receiving a fluid from the fluid source and at least one fluid outlet aperture configured to be in fluid communication with a tool for delivering the fluid to the tool; a valve spool at least partially positioned within the sleeve and adapted to move between a first position in which a fluid path for flow of the fluid between the fluid inlet aperture and the fluid outlet aperture is blocked by the valve spool and therefore closed, and a second position in which the fluid path between the fluid inlet aperture and the fluid outlet aperture is open and permits the fluid to flow from the fluid inlet aperture to the fluid outlet aperture; a lubricant charge chamber; and a portion of the valve spool forms a lubricant pumping mechanism operable by movement of the valve spool between the second position and the first position to displace a lubricant from the lubricant charge chamber, and the valve spool maintains the fluid separate from the lubricant to prevent contamination of each.