Other

Rogelio Blanco Jester

Ahmad-Maher Moubayed

A peristaltic pump for pumping liquids through a resilient tube. In one embodiment, the pump includes a curved concave platen against which a resilient tube is placed. A multi lobed cam is positioned adjacent to the platen and tube. A plurality of pump fingers are mounted between tube and cam in a manner permitting radial movement of the pump fingers. As the cam rotates, the fingers are pressed toward the tube sequentially so as to pump liquid through the tube. The lobe end should press the tube sufficiently to occlude the tube and prevent back flow without over pressing and damaging the tube. A transverse pinch finger is provided on each pump finger, extending from the tube pressing face of each pump finger. At the tube occluding position, the pump finger nearly occludes the tube and the pinch finger completes occlusion without pressing the tube beyond the fully occluded position. A fixed or slidable spring pressed pinch finger may be used. In a second embodiment, the pump fingers also include pinch fingers and are moved toward and away from a planar platen by a plurality of cams mounted transversely on a rotatable shaft. The pinch fingers operate in the same manner as in the first embodiment.

Linear peristaltic pump

A curvilinear peristaltic pump for pumping liquids through a resilient tube. The pump includes a curved concave platen against which a resilient tube is placed. A multi-lobed cam is positioned adjacent to the platen and tube. A plurality of pump fingers, each carrying a pinch finger, are mounted between tube and cam in a manner permitting radially outward movement of the pump fingers toward the platen. As the cam rotates, the fingers are pressed against the tube sequentially so as to pump liquid through the tube. A strain gauge beam is secured to the pump just beyond each end of the pump finger set. A sensing member secured to the free end of the beam is pre-loaded against the tube next to each endmost pump finger. When an input occlusion occurs, the tubing will collapse causing the beam to deflect toward the tube, changing its pre-load state. This motion will cause a negative voltage change indicative of the input occlusion. At the other side, an output occlusion will cause the tubing to inflate, moving the beam member outward and deflecting the beam to cause a positive voltage change.

Curvilinear peristaltic pump with occlusion detection means

A peristaltic pump for pumping liquids through a resilient tube. The pump includes a platen against which a resilient tube is placed. A cam assembly is positioned adjacent to the platen and tube. A plurality of pump fingers are mounted between tube and cam assembly in a manner permitting movement of the pump fingers toward and away from the tube. As the cam assembly rotates, the fingers are pressed toward the tube sequentially so as to pump liquid through the tube. The pump finger ends should press the tube sufficiently to at least nearly occlude the tube and prevent back flow without over pressing and damaging the tube. A transverse pinch finger is provided in a cavity in the platen opposite each pump finger, with a tip on each finger spring biased to extend from the tube pressing face of the platen. At the tube occluding position, the pump finger nearly occludes the tube and the pinch finger completes occlusion without pressing the tube beyond the fully occluded position.

Non-rolling type peristaltic pump having pressure plate mounted tube

A curvilinear peristaltic pump for pumping liquids through a resilient tube. The pump includes a curved concave platen against which a resilient tube is placed. A multi lobed cam is positioned adjacent to the platen and tube. A plurality of pump fingers are mounted between the tube and cam in a manner permitting radial movement of the pump fingers. As the cam rotates, the fingers are pressed toward the tube sequentially so as to pump liquid through the tube. The lobe end presses the tube sufficiently to occlude the tube and prevent back flow without over pressing and damaging the tube. A transverse pinch finger is provided on each pump finger, extending from the tube pressing face of each pump finger. At the tube occluding position, the pump finger nearly occludes the tube and the pinch finger completes occlusion without pressing the tube beyond the fully occluded position. A fixed or slidable spring pressed pinch finger may be used.

Growing community of inventors

Mexicali, B.C., Mexico

Rogelio Blanco Jester