US2007237642A1PendingUtilityA1

Axial flow positive displacement worm pump

43
Individually held — no corporate assignee on recordPriority: Apr 10, 2006Filed: Apr 10, 2006Published: Oct 11, 2007
Est. expiryApr 10, 2026(expired)· nominal 20-yr term from priority
Inventors:Kurt David MurrowRollin George GiffinOladapo Fakunle
F04C 2/084F04C 2/1071F04C 2/1073
43
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

An axial flow positive displacement worm pump has a pump assembly including inner and outer bodies having offset inner and outer axes respectively extending from an inlet to an outlet. At least one of the bodies is rotatable about its axis. The inner and outer bodies have intermeshed inner and outer helical blades wound about the inner and outer axes respectively. The inner and outer helical blades extend radially outwardly and inwardly respectively. One of inner and outer numbers of the inner and outer helical blades respectively is two or more. The number of the outer helical blades is one more or one less than the number of the inner helical blades. The inner and outer bodies may both be rotatable about the inner and outer axes respectively in same inner and outer rotational directions respectively and geared together in a fixed gear ratio.

Claims

exact text as granted — not AI-modified
1 . An axial flow positive displacement worm pump comprising: 
 an inlet axially spaced apart and upstream from an outlet,    a pump assembly including an inner body disposed within an outer body and the inner and outer bodies extending from the inlet to the outlet,    the inner and outer bodies having offset inner and outer axes respectively,    at least one of the inner and outer bodies being rotatable about a corresponding one of the inner and outer axes,    the inner and outer bodies having intermeshed inner and outer helical blades wound about the inner and outer axes respectively,    the inner and outer helical blades extending radially outwardly and inwardly respectively, the inner and outer bodies have inner and outer numbers of inner and outer helical blades respectively, and    one of the inner and outer numbers of the inner and outer helical blades respectively is two or more.    
   
   
       2 . A worm pump as claimed in  claim 1  further comprising the number of outer helical blades is one more or one less than the number of inner helical blades.  
   
   
       3 . A worm pump as claimed in  claim 1  further comprising the helical blades having sufficient number of turns to trap charges of fluid in the pump assembly during the pump's operation.  
   
   
       4 . A worm pump as claimed in  claim 3  further comprising the number of turns being sufficient to mechanically trap the charges of fluid.  
   
   
       5 . A worm pump as claimed in  claim 4  further comprising the number of outer helical blades is one more or one less than the number of inner helical blades.  
   
   
       6 . A worm pump as claimed in  claim 1  further comprising the inner and outer bodies being rotatable about the inner and outer axes respectively in the same inner and outer rotational directions respectively.  
   
   
       7 . A worm pump as claimed in  claim 6  further comprising the inner and outer bodies being geared together in a fixed gear ratio.  
   
   
       8 . A worm pump as claimed in  claim 6  further comprising the number of outer helical blades is one less than the number of the inner helical blades and the inner body is operable to orbit about the outer axis in an orbital direction same as the inner rotational direction.  
   
   
       9 . A worm pump as claimed in  claim 8  further comprising the inner and outer bodies being geared together in a fixed gear ratio.  
   
   
       10 . A worm pump as claimed in  claim 6  further comprising the number of outer helical blades is one more than the number of the inner helical blades and the inner body is operable to orbit about the outer axis in an orbital direction opposite the inner rotational direction.  
   
   
       11 . A worm pump as claimed in  claim 10  further comprising the inner and outer bodies being geared together in a fixed gear ratio.  
   
   
       12 . A worm pump as claimed in  claim 1  further comprising the inner and outer twist slopes of the inner and outer helical blades respectively, and a first ratio of the outer twist slope to the inner twist slope equal to a second ratio of the inner number of the inner helical blades on the inner body to the outer number of the outer helical blades on the outer body.  
   
   
       13 . A worm pump as claimed in  claim 12  further comprising the number of outer helical blades is one more or one less than the number of the inner helical blades.  
   
   
       14 . A worm pump as claimed in  claim 12  further comprising the helical blades having sufficient number of turns to trap charges of fluid in the pump assembly during the pump's operation.  
   
   
       15 . A worm pump as claimed in  claim 14  further comprising the number of turns being sufficient to mechanically trap the charges of fluid.  
   
   
       16 . A worm pump as claimed in  claim 15  further comprising the number of outer helical blades is one more or one less than the number of the inner helical blades.  
   
   
       17 . A worm pump as claimed in  claim 12  further comprising the inner and outer bodies being rotatable about the inner and outer axes respectively in same inner and outer rotational directions respectively.  
   
   
       18 . A worm pump as claimed in  claim 17  further comprising the inner and outer bodies being geared together in a fixed gear ratio.  
   
   
       19 . A worm pump as claimed in  claim 17  further comprising the number of outer helical blades is one less than the number of the inner helical blades and the inner body is operable to orbit about the outer axis in an orbital direction same as the inner rotational direction.  
   
   
       20 . A worm pump as claimed in  claim 19  further comprising the inner and outer bodies being geared together in a fixed gear ratio.  
   
   
       21 . A worm pump as claimed in  claim 17  further comprising the number of the outer helical blades is one more than the number of the inner helical blades and the inner body is operable to orbit about the outer axis in an orbital direction opposite the inner rotational direction.  
   
   
       22 . A worm pump as claimed in  claim 21  further comprising the inner and outer bodies being geared together in a fixed gear ratio.  
   
   
       23 . A worm pump as claimed in  claim 1  further comprising the outer body being rotatably fixed about the outer axis and the inner body being orbital about the outer axis.  
   
   
       24 . A worm pump as claimed in  claim 23  further comprising the number of outer helical blades is one more or one less than the number of the inner helical blades.  
   
   
       25 . A worm pump as claimed in  claim 23  further comprising the helical blades having sufficient number of turns to trap charges of fluid in the pump assembly during the pump's operation.  
   
   
       26 . A worm pump as claimed in  claim 25  further comprising the number of turns being sufficient to mechanically trap the charges of fluid.  
   
   
       27 . A worm pump as claimed in  claim 26  further comprising the number of outer helical blades is one more or one less than the number of the inner helical blades.  
   
   
       28 . A worm pump as claimed in  claim 23  further comprising the inner and outer bodies being rotatable about the inner and outer axes respectively in same inner and outer rotational directions respectively.  
   
   
       29 . A worm pump as claimed in  claim 28  further comprising the number of outer helical blades is one less than the number of the inner helical blades and the inner body is operable to orbit about the outer axis in an orbital direction same as the inner rotational direction.  
   
   
       30 . A worm pump as claimed in  claim 28  further comprising the number of outer helical blades is one more than the number of the inner helical blades and the inner body is operable to orbit about the outer axis in an orbital direction opposite the inner rotational direction.  
   
   
       31 . A worm pump as claimed in  claim 23  further comprising the inner and outer twist slopes of the inner and outer helical blades respectively, and a first ratio of the outer twist slope to the inner twist slope equal to a second ratio of the inner number of the inner helical blades on the inner body to the outer number of the outer helical blades on the outer body.

Join the waitlist — get patent alerts

Track US2007237642A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.