Pump

Abstract

A pump flexes a diaphragm to move fluid through a pump chamber. In one implementation, the diaphragm is conical shaped. In one implementation, the diaphragm extends across the pump chamber, wherein a passage extends from a first side of the diaphragm to a second side of the diaphragm supply fluid are being pumped by the diaphragm. In one implementation, a bypass passage extends from adjacent an inlet to adjacent an outlet of the pump chamber.

What is claimed is: 
     
         1 . A pump comprising:
 a pump chamber having an inlet and an outlet;   a conical diaphragm between the inlet and the outlet; and   a drive operably coupled to the conical diaphragm to flex the conical diaphragm to move fluid within the chamber towards the outlet.   
     
     
         2 . The pump of  claim 1  further comprising a cup shaped baffle carried by the conical diaphragm, the cup shaped baffle having an interior facing in a direction, wherein the conical diaphragm has a concave interior facing in the direction. 
     
     
         3 . The pump of  claim 2  further comprising at least one aperture through the conical diaphragm between the baffle and an outer perimeter of the conical diaphragm. 
     
     
         4 . The pump of  claim 1  further comprising:
 a housing; and 
 a bypass within the housing through which fluid may flow from adjacent an exterior of the inlet to adjacent an exterior of the outlet when the at least one of the inlet and the outlet are occluded. 
 
     
     
         5 . The pump of  claim 4 , wherein the bypass comprises a passage alongside the chamber. 
     
     
         6 . The pump of  claim 1  further comprising:
 a first check valve across the inlet, the first check valve having a first input side and a first output side adjacent the chamber; 
 a second check valve across the outlet, the second check valve having a second input side adjacent the chamber and a second output side; and 
 a passage extending from the first input side of the first check valve alongside the chamber to the second output side of the second check valve. 
 
     
     
         7 . The pump of  claim 1 , wherein the conical diaphragm extends across the chamber between the inlet and the outlet. 
     
     
         8 . The pump of  claim 7 , wherein the conical diaphragm comprises apertures through the conical diaphragm through which fluid flows. 
     
     
         9 . The pump of  claim 8  further comprising a passage extending from the inlet behind the conical diaphragm to a discharge opening within an interior of the chamber between the inlet and the outlet and in front of a concave side of the conical diaphragm. 
     
     
         10 . The pump of  claim 9  further comprising a unidirectional collapsible valve at the discharge opening of the passage. 
     
     
         11 . The pump of  claim 1 , wherein the drive comprises:
 a first magnet carried by the conical diaphragm; and   a second magnet to magnetically interact with the first magnet to linearly move the conical diaphragm.   
     
     
         12 . The pump of  claim 11 , wherein the second magnet repels the first magnet to linearly move the conical diaphragm. 
     
     
         13 . The pump of  claim 1 , wherein the drive comprises:
 a cam;   a cam follower carried by the diaphragm; and   an actuator operably coupled to the cam to move the cam relative to the cam follower to linearly move the chemical diaphragm.   
     
     
         14 . The pump of  claim 1  further comprising a backflow inhibiting director within the chamber. 
     
     
         15 . A pump comprising:
 a pump chamber having an inlet and an outlet;   a diaphragm across the chamber between the inlet and the outlet; and   a passage from the inlet on a first side of the diaphragm to a second side of the diaphragm.   
     
     
         16 . The pump of  claim 15 , wherein the passage comprises at least one aperture through the diaphragm to transmit fluid. 
     
     
         17 . The pump of  claim 15 , wherein the passage extends to a discharge opening on the second side of the diaphragm between the diaphragm and the outlet. 
     
     
         18 . The pump of  claim 17  further comprising a unidirectional collapsible valve at the discharge opening. 
     
     
         19 . The pump of  claim 14 , wherein the diaphragm is conical. 
     
     
         20 . A method comprising:
 providing a conical shaped diaphragm adjacent the pump chamber; and   flexing the comment shape diaphragm to move fluid through the pump chamber.