Patent ID: 7159614
Filing Date: 2007-01-09
Classification: F16K,Y10T

Abstract:
1. An in-line valve assembly comprising: a valve housing; a valve piston which may be received by a stationary valve piston seat, a piston rod coupled to said valve piston such that said piston rod and said valve piston are movable together relative to said stationary valve piston seat an air pressure chamber acting on said valve piston and operable to drive said piston rod and said valve piston; a manually operable wrench shaft coupled to said piston rod by way of a movable coupling such that when said manually operable wrench shaft is manually rotated, said piston rod and said valve piston are driven to travel together longitudinally; and when said piston rod and said valve piston are driven together longitudinally as a result of a pressure change in said air pressure chamber imparted to said valve piston, said manually operable wrench shaft is driven to rotate, wherein said movable coupling is a flexible material assembly.