Replaceable Valve Assembly

Abstract

A lift-valve assembly, comprising a lift valve within a housing that includes a pressure segment, a mounting segment, a port segment, and a seat segment. The lift-valve assembly may receive a lift valve, and the housing including a valve seat and a biasing spring in a selectively replaceable configuration suitable for use in a conventional internal combustion engine in place of the conventional individual components, actuated by a cam actuating system, and controlling fluid communication between a combustion chamber and both intake and exhaust systems.

I claim: 
     
         1 . A valve assembly for controlling fluid communication into a periodically pressurized chamber, comprising:
 a pressure segment, a mounting segment, a port segment, and a seat segment;   the pressure segment including a spring and a tension retainer;   the mounting segment including a mounting interface;   the port segment including at least one port and a port framework;   the seat segment including a valve seat and a pressure chamber seal; and   the pressure chamber seal sealing the valve assembly from pressures within the periodically pressurized chamber.   
     
     
         2 . The valve assembly of  claim 1 , further comprising:
 a lift valve having a valve stem and a valve head;   the valve head having a valve head perimeter; and   the valve head perimeter having a valve seat face.   
     
     
         3 . The valve assembly of  claim 1 , further comprising:
 the valve seat having an inside perimeter forming a round valve orifice, and a seat seat-face on the inside perimeter.   
     
     
         4 . The valve assembly of  claim 2 , further comprising:
 the valve seat having a valve seat inside perimeter forming a round valve orifice, and a valve seat-face on the inside perimeter;   the valve assembly having an open position where the pressure segment is compressed and the valve head extends from the valve orifice; and   the valve assembly having a closed position where the pressure segment is extended and the valve seat-face impinges against the seat seat-face.   
     
     
         5 . The valve assembly of  claim 4 , further comprising:
 the valve seat inside perimeter sized to correspond to the valve head perimeter so that the valve seat-face and the seat seat-face form a tight seal when the valve is in the closed position.