Title:
IMPELLER ASSEMBLY AND METHOD FOR DEFINING AERODYNAMIC CHANNELS
Document Type and Number:
WIPO Patent Application WO/2012/103262
Kind Code:
A3
Abstract:
An impeller assembly and method of providing a plurality of radially-aligned aerodynamic channels including a rim plate defining a plurality of blades and the backplate defining a blade interlock structure for aligning and coupling the plates together. The rim plate defines a plurality of fluid-engaging blades with the aerodynamic channels being defined between adjacent pairs of the blades. The interlock structure includes a plurality of tine-shaped interlocks extending from the backplate. Each blade of the impeller may engage the interlock structure in a saddle manner. The backplate is defined by areas of reduced thickness allowing outer portions of the backplate to flex (rotate) toward further contact with the rim plate. The impeller assembly is provided with a plurality of aerodynamic channels defined by complex curved surfaces of the back plate and the rim plate to improve efficiency.
Inventors:
WYDRA LARRY DAVID (US)
Application Number:
PCT/US2012/022613
Publication Date:
December 13, 2012
Filing Date:
January 25, 2012
Export Citation:
Assignee:
TENNANT CO (US)
WYDRA LARRY DAVID (US)
WYDRA LARRY DAVID (US)
International Classes:
F04D29/18
Foreign References:
| US20080286130A1 | 2008-11-20 | |||
| US2465625A | 1949-03-29 | |||
| US3510229A | 1970-05-05 | |||
| US7008189B2 | 2006-03-07 | |||
| US20100263373A1 | 2010-10-21 | |||
| US3743440A | 1973-07-03 |
Attorney, Agent or Firm:
KLOS, John, F. et al. (P.A.2200 IDS Center,80 South Eighth Stree, Minneapolis MN, US)
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