Miniaturized diaphragm pump with non-resilient seals

Abstract

A diaphragm pump head with a non-resilient seal comprising: a valve head and a mating valve cover forming a diaphragm chamber. A pump diaphragm forming at least a part of a wall of the diaphragm chamber with the valve cover including an inlet passage leading from a pump input port and through an inlet valve to the diaphragm chamber, and an outlet passage leading from the diaphragm chamber and through an outlet valve to a pump outlet port. The inlet valve and the outlet valve each include a valve diaphragm, and an inlet non-resilient seal and an outlet non-resilient seal. Each non-resilient seal including first and second annular diaphragm seating faces formed in mating faces of the valve body and the valve cover surrounding the inlet passage and the outlet passage and a non-resilient, deformable valve diaphragm entrapped between the first and second diaphragm seating faces.

1 . A diaphragm pump head with a non-resilient seal, comprising: 
 a valve head and a mating valve cover forming a diaphragm chamber, and    a pump diaphragm forming at least a part of a wall of the diaphragm chamber, 
 the valve cover including 
 an inlet passage leading from a pump input port and through an inlet valve to the diaphragm chamber, and  
 an outlet passage leading from the diaphragm chamber and through an outlet valve to a pump outlet port, wherein  
 the inlet valve and the outlet valve each include a valve diaphragm, and  
 
   an inlet non-resilient seal and an outlet non-resilient seal, each non-resilient seal including 
 first and second annular diaphragm seating faces formed in mating faces of the valve body and the valve cover surrounding the inlet passage and the outlet passage and a non-resilient, deformable valve diaphragm entrapped between the first and second diaphragm seating faces.  
   
   
   
       2 . The diaphragm pump head of  claim 1 , wherein each valve diaphragm includes: 
 a central valve plate,    a resiliently deformable valve spring surrounding the central valve plate, and    a plurality of valve passages formed in the valve spring and surrounding the valve plate.    
   
   
       3 . The diaphragm pump head of  claim 1 , wherein 
 the inlet valve opens in an inlet direction from the inlet passage to the diaphragm chamber, and    the outlet valve opens in an outlet direction from the diaphragm chamber to the outlet passage.    
   
   
       4 . The diaphragm pump head of  claim 1 , wherein 
 the inlet passage leads from the pump inlet port to an inlet side of the inlet valve,    the outlet passage leads from an outlet side of the outlet valve to the pump outlet port, 
 an outlet side of the inlet valve and an inlet set of the outlet valve are connected to the diaphragm chamber.  
   
   
   
       5 . The diaphragm pump head of  claim 1 , wherein 
 each valve diaphragm includes 
 a central valve plate,  
 a resiliently deformable valve spring surrounding the central valve plate, and  
 a plurality of valve passages formed in the valve spring and surrounding the valve plate, and  
 in each non-resilient seal, 
 the first annular diaphragm seating face is located on an inlet side of the valve and has a first valve passage with a first diameter less than a diameter of the central valve plate, and  
 the second annular diaphragm seating face is located on an outlet side of the pump and has a second valve passage with a second diameter greater than a diameter of the valve passages through the valve diaphragm.  
 
   
   
   
       6 . A diaphragm pump with a non-resilient seal, comprising: 
 a valve head and a valve cover forming a diaphragm chamber, and    a pump diaphragm forming at least a part of a wall of the diaphragm chamber, 
 the valve cover including 
 an inlet passage leading from a pump input port and through an inlet valve to the diaphragm chamber, and  
 an outlet passage leading from the diaphragm chamber and through an outlet valve to a pump outlet port, wherein  
 the inlet valve and the outlet valve each include a valve diaphragm, and  
 
   an inlet non-resilient seal and an outlet non-resilient seal, each non-resilient seal including 
 first and second annular diaphragm seating faces formed in mating faces of the valve body and the valve cover surrounding the inlet passage and the outlet passage and a non-resilient, deformable valve diaphragm entrapped between the first and second diaphragm seating faces,  
 a motor driving an eccentric crank, and  
 a connecting rod connected between the eccentric crank and the pump diaphragm of the at least one pump head and driven with a reciprocating motion by the eccentric crank.  
   
   
   
       7 . The diaphragm pump of  claim 6 , wherein each valve diaphragm includes: 
 a central valve plate,    a resiliently deformable valve spring surrounding the central valve plate, and    a plurality of valve passages formed in the valve spring and surrounding the valve plate.    
   
   
       8 . The diaphragm pump head of  claim 1 , wherein 
 the inlet valve opens in an inlet direction from the inlet passage to the diaphragm chamber, and    the outlet valve opens in an outlet direction from the diaphragm chamber to the outlet passage.    
   
   
       9 . The diaphragm pump head of  claim 6 , wherein 
 the inlet passage leads from the pump inlet port to an inlet side of the inlet valve,    the outlet passage leads from an outlet side of the outlet valve to the pump outlet port, 
 an outlet side of the inlet valve and an inlet set of the outlet valve are connected to the diaphragm chamber.  
   
   
   
       10 . The diaphragm pump head of  claim 6 , wherein 
 each valve diaphragm includes 
 a central valve plate,  
 a resiliently deformable valve spring surrounding the central valve plate, and  
 a plurality of valve passages formed in the valve spring and surrounding the valve plate, and  
 in each non-resilient seal,  
 the first annular diaphragm seating face is located on an inlet side of the valve and has a first valve passage with a first diameter less than a diameter of the central valve plate, and  
 the second annular diaphragm seating face is located on an outlet side of the pump and has a second valve passage with a second diameter greater than a diameter of the valve passages through the valve diaphragm.