Pump

Claim 1

A PUMP, COMPRISING A STATIONARY TUBE CARRYING MEMBER HAVING A CIRCULAR OUTER SURFACE PROVIDED WITH MEANS FOR SUPPORTING A RESILIENT FLEXIBLE AND COMPRESSIBLE PUMP TUBE ON SAID OUTER SURFACE, A RESILIENT FLEXIBLE AND COMPRESSIBLE PUMP TUBE SUPPORTED ON SAID SURFACE, A ROTARY CARRIER MEMBER PROVIDED WITH A SERIES OF PRESSURE APPLYING ROLLERS ARRANGED IN A CIRCULAR ROW IN CONCENTRIC RELATION TO SAID CIRCULAR OUTER SURFACE AND EXTERNALLY OF SAID TUBE CARRYING MEMBER, SAID ROLLERS BEING MOVABLE FROM AN INOPERATIVE POSITION WHEREIN SAID ROLLERS ARE DISENGAGED FROM SAID TUBE TO AN OPERATIVE POSITION WHEREIN SAID ROLLERS ENGAGE SAID TUBE, AND MEANS OPERATIVELY CONNECTED TO SAID ROLLERS AND OPERABLE FOR MOVING SAID ROLLERS FROM THEIR DISENGAGED POSITION TO THEIR ENGAGED POSITION, SAID ROLLER MOVING MEANS HAVING ROLLER ENGAGING PARTS MOVABLE FROM A POSITION WHEREIN SAID PARTS ENGAGE SAID ROLLERS AND PREVENT THE LATTER FROM ENGAGING SAID TUBE TO A POSITION WHEREIN SAID PARTS ARE DISENGAGED FROM SAID TUBE TO PERMIT ENGAGEMENT OF SAID TUBE BY SAID ROLLERS, MEANS FOR MOVING SAID ROLLER MOVING MEANS TO AND FROM SAID POSITIONS, AN ELECTRIC MOTOR FOR ROTATING SAID CARRIER MEMBER, AND SWITCH MEANS FOR CONTROLLING THE OPERATION OF SAID MOTOR UNDER THE CONTROL OF SAID MEANS FOR MOVING SAID ROLLER MOVING MEANS, SO THAT THE MOTOR IS ENERGIZED WHEN SAID TUBE IS ENGAGED BY SAID ROLLERS AND IS DEENERGIZED WHEN SAID ROLLERS ARE DISENGAGED FROM SAID TUBE.