Peristaltic-type pump

Claim 1

A PERISTALTIC-TYPE PUMP FOR MOMENTARILY COMPRESSING SUCCESSIVE PORTIONS OF A LENGTH OF COLLAPSIBLE TUBING, SAID PUMP COMPRISING, A HOUSING HAVING A PAIR OF PARALLEL SPACED WALL PORTIONS EACH OF WHICH IS CONFIGURED FOR DEFINING A CIRCULAR TRACK, SAID TRACKS HAVING THEIR CENTRAL AXES CO-AXIAL AND PERPENDICULAR TO SAID WALL PORTIONS, A PLURALITY OF PLANETARY ROLLERS EXTENDING AXIALLY OF SAID CIRCULAR TRACKS AND HAVING THEIR OPPOSITE END PORTIONS IN RESPECTIVE ROLLING ENGAGEMENT WITH THE TRACKS, A CENTRAL ROLLER CO-AXIAL WITH SAID AXES AND IN SIMULTANEOUS ENGAGEMENT WITH ALL OF SAID PLANETARY ROLLERS THEREBY TO COOPERATE WITH SAID TRACKS FOR DRIVING THE PLANETARY ROLLERS ABOUT THEIR RESPECTIVE CENTRAL AXES AND ALONG A CIRCULAR PATH DESCRIBED BY MOVEMENT OF THE LAST MENTIONED AXES, EACH OF SAID ROLLERS HAVING A TUBE CONTACTING PORTION INTERMEDIATE SAID END PORTIONS, SAID HOUSING INCLUDING A PORTION PROVIDED WITH A BEARING SURFACE WHICH EXTENDS ALONG AT LEAST A PORTION OF THE LENGTH OF SAID TRACKS IN PARALLEL SPACED RELATION FROM THE SAME, A LENGTH OF COLLAPSIBLE TUBING HAVING A SECTION THEREOF IN CONTACT WITH SAID BEARING SURFACE ALONG A PORTION OF THE LENGTH OF THE LATTER, THE RADIUS OF SAID BEARING SURFACE BEING GREATER THAN THE SUM OF THE RADIUS OF SAID PATH AND THE RADIUS OF ONE OF SAID PLANETARY ROLLERS AT THE TUBE CONTACTING PORTION THEREOF BY AN AMOUNT WHICH IS GENERALLY THE SAME AS TWICE THE WALL THICKNESS OF THE COLLAPSIBLE TUBING TO BE COMPRESSED.