Patent ID: 7553066

Claim:
A method for self-feeding and self-flushing a lubricant fluid material, in a high-pressure mixing apparatus for reactive chemical components, in which the apparatus comprises: a mixing chamber; an outlet duct for delivering a resulting mixture; a reciprocable cleaning member axially sliding in the outlet duct; and means for feeding the lubricant material by the reciprocating movement of the cleaning member into the outlet duct, the method comprising the steps of: feeding the lubricant material from a storage tank into a lubricant supply chamber of the mixing apparatus in fluid communication with the outlet duct; conforming the cleaning member with a pumping piston slidably movable in the outlet duct; sucking the lubricant material from the supply chamber into the outlet duct; and reflowing the lubricant material from the outlet duct to the supply chamber and into the storage tank, by the reciprocating movement of the pumping piston in the outlet duct.