Patent ID: 6202698
Filing Date: 2001-03-20
Classification: F16K,Y10T

Abstract:
A valve assembly comprising:(a) a valve body having a planar face area;(b) an upper valve head having a matching planar face area for contact against said valve body at the planar face thereof;(c) a seal member compressible therebetween;(d) a single tensioned fastener between said valve body and said head pulling said valve body and said upper valve head together to form a leakproof seal therebetween, wherein said single tension fastener comprises co-linear, opposing screws passing through a central opening in said upper valve head and a central open in a lower valve head and threading into a threaded central opening within said valve body;(e) at least two movable push rods of equal length operatively cooperating opposing pistons and with said seal member to operate said valve assembly; and(f) said opposing pistons are operatively moved by pressure applied through a single fitting port penetrating said valve body and in fluid communication with a chamber defined by said opposing pistons.