Method of, and apparatus for, regulating the pressure in a deformable conduit conducting a flowing fluid

Apparatus for regulating the pressure of a fluid flowing in a deformable conduit, comprising

• (a) at least two spaced annular housing means through which the deformable conduit passes;
• (b) first fluid pressure control means arranged between said spaced annular housing means in a first plane and including
• (1) a first fixed support beam connected at opposite ends with said housing means and including a plurality of first longitudinally spaced ridges;
• (2) first operating rod means arranged opposite said first beam and including a plurality of second longitudinally spaced ridges arranged opposite, and extending in the direction of, said first ridges to define a plurality of first opposed pairs of ridges;
• and
• (3) first means connected with each of said housing means, respectively, for displacing said first operating rod means relative to said first support beam;
• and
• (c) second fluid pressure control means arranged between said spaced annular housing means in a second plane normal to said first plane and including
• (1) a second fixed support beam connected at opposite ends with said housing means and including a plurality of third ridges longitudinally spaced between said plurality of first ridges;
• (2) second operating rod means arranged opposite said second beam and including a plurality of fourth longitudinally spaced ridges arranged opposite, and extending in the direction of, said third ridges to define a plurality of second opposed pairs of ridges, the flexible conduit being arranged between said first and second pairs of ridges, respectively;
• and
• (3) second means connected with each of said housing means, respectively, for displacing said second operating rod means relative to said second support beam, whereby displacement of said first and second operating rods changes the cross-sectional area of the flexible conduit, thereby to control the pressure of fluid flowing therethrough.