Fluid dampened back pressure regulator

A fluid dampened back pressure regulator valve comprising housing means having inlet port means and outlet port means in communication with the inlet port means, valve seat means disposed within the housing and interposed between the inlet port means and outlet port means, cage means engageable with the valve seat means for retaining the valve seat in the housing means, valve closure means loosely disposed within the cage means and cooperating with the valve seat means to provide alternate open and closed positions for the back pressure regulator valve, reciprocal piston means disposed within the cage means and engageable with the valve closure means, spring means disposed within the housing means and in engagement with the reciprocal piston means for retaining the piston means in engagement with the closure means and maintaining a normally closed position for the back pressure regulator valve, fluid reservoir means cooperating with the reciprocal piston means for dampening the opening and closing of the valve closure means with respect to the valve seat means for reducing the clattering of the back pressure valve during operation thereof, wherein the reciprocal piston means comprises shock cage means disposed within the housing means and having one closed end engageable with the cage means and one open end, a reciprocal piston rod member extending through the shock cage means and through the closed end thereof, shock cap means secured to the open end of the shock cage means to provide a fluid reservoir chamber therein, a piston member carried by the piston rod member and reciprocally disposed within the fluid chamber, and passageway means provided in the piston rod member in communication with the fluid reservoir chamber on opposite sides of the piston member for cooperating with the fluid reservoir to provide the dampening during the opening and closing of the back pressure regulator valve.