Automatic valve for controlling the passage of an in- feed pressure fluid to be delivered in predetermined quantities into a receiver

Abstract From the Canadian patent

Automatic valve for controlling the passage of an in-feed pressure fluid to be delivered in predetermined quantities into a receiver. The automatic control valve comprises two tandem-joined piston cylinders. The first piston cylinder comprises two cavities of different volumes. The second piston cylinder comprises only one cavity. There is placed a piston in each of the cavities of the first piston cylinder which pistons have different diameters and the circumference surfaces are spaced from the inside walls limiting the respective cavities of the first piston cylinder. The cavity of the second piston cylinder comprises a shockabsorbing device connected with a piston rod carrying also both …