US2008260551A1PendingUtilityA1

Rolling diaphragm pump

53
Assignee: SIMMONS WALTER NEALPriority: Jan 26, 2007Filed: Jan 26, 2008Published: Oct 23, 2008
Est. expiryJan 26, 2027(~0.5 yrs left)· nominal 20-yr term from priority
Inventors:Walter Neal Simmons
F04B 45/043
53
PatentIndex Score
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Cited by
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Claims

Abstract

A rolling diaphragm pump includes a housing, a rolling seal diaphragm disposed in the housing, a piston for driving the diaphragm, and a valve for regulating the flow of working fluid in a portion of the housing. A constant differential pressure is maintained across the diaphragm independent of discharge pressure of the pump. A method of pumping a viscous medium includes pumping the viscous medium by maintaining a constant differential pressure across a rolling seal diaphragm independent of discharge pressure of the viscous medium, with the diaphragm disposed between the viscous medium and a working medium and being driven by a piston.

Claims

exact text as granted — not AI-modified
1 . A rolling diaphragm pump comprising:
 a housing;   a rolling seal diaphragm disposed in the housing;   a piston for driving the diaphragm; and   a valve for regulating the flow of working fluid in a portion of the housing;   wherein a constant differential pressure is maintained across the diaphragm independent of discharge pressure of the pump.   
   
   
       2 . The pump of  claim 1 , wherein the rolling seal diaphragm is top hat shaped. 
   
   
       3 . The pump of  claim 1 , wherein the constant differential pressure is between 1 psi and 100 psi. 
   
   
       4 . The pump of  claim 1 , wherein the constant differential pressure is between 10 psi and 50 psi. 
   
   
       5 . The pump of  claim 1 , wherein the constant differential pressure is between 10 psi and 20 psi. 
   
   
       6 . The pump of  claim 1 , wherein the discharge pressure is greater than 1000 psi. 
   
   
       7 . The pump of  claim 1 , wherein the discharge pressure is greater than 500 psi. 
   
   
       8 . A method of pumping a viscous medium comprising:
 pumping the viscous medium by maintaining a constant differential pressure across a rolling seal diaphragm independent of discharge pressure of the viscous medium, with the diaphragm disposed between the viscous medium and a working medium and being driven by a piston.   
   
   
       9 . The method of  claim 8 , wherein the viscous medium is discharged at a constant flow rate. 
   
   
       10 . The method of  claim 8 , wherein the viscous medium is discharged at a constant pressure. 
   
   
       11 . The method of  claim 8 , further comprising:
 regulating the flow of the working medium.   
   
   
       12 . The method of  claim 8 , wherein the rolling seal diaphragm is top hat shaped. 
   
   
       13 . The method of  claim 8 , wherein the constant differential pressure is between 1 psi and 100 psi. 
   
   
       14 . The method of  claim 8 , wherein the constant differential pressure is between 10 psi and 50 psi. 
   
   
       15 . The method of  claim 8 , wherein the constant differential pressure is between 10 psi and 20 psi. 
   
   
       16 . The method of  claim 8 , wherein the discharge pressure is greater than 1000 psi. 
   
   
       17 . The method of  claim 8 , wherein the discharge pressure is greater than 500 psi. 
   
   
       18 . The method of  claim 8 , wherein the viscous medium comprises a slurry with a viscosity between 10,000 and 5,000,000 centipoise. 
   
   
       19 . The method of  claim 8 , wherein the viscous medium comprises aggregate with a maximum lateral dimension of ¼ inch. 
   
   
       20 . The method of  claim 8 , wherein the viscous medium comprises aggregate with a maximum lateral dimension of ⅛ inch.

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