US2013170974A1PendingUtilityA1

Pumping element design

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Individually held — no corporate assignee on recordPriority: Sep 10, 2010Filed: Sep 10, 2010Published: Jul 4, 2013
Est. expirySep 10, 2030(~4.1 yrs left)· nominal 20-yr term from priority
Inventors:Kevin J. LundeSen Y. Meng
F04D 29/2277F04D 29/242F04D 29/669F01D 5/12
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Claims

Abstract

A pumping element includes a blade ( 20 ) having a first section proximate a hub and a second section proximate a tip, a cavity height distribution based on a selected incidence angle distribution and a selected blade thickness distribution based on a structural requirement. The resulting cavity height distribution matches the blade thickness at the first section and the second section and is greater than the blade thickness along the blade.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A pumping element comprising:
 a blade having a first section proximate a hub, a second section proximate a tip;   a selected incidence angle distribution;   a selected blade thickness distribution based on a structural requirement; and   a cavity height distribution based on the selected incidence angle distribution, wherein the resulting cavity height distribution matches the blade thickness at the first section and the second section and is greater than the blade thickness along the blade.

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