Regenerative pump with improved suction

Patent 5265996 Issued on November 30, 1993. Estimated Expiration Date:

March 10, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

694980

1537732

2003350

3685287

Lateral channel pump
Patent #: 4408952
Issued on: 10/11/1983
Inventor: Schweinfurter

Side channel compressor Patent #: 4992022
Issued on: 02/12/1991
Inventor: Aust, et al.

Inventors

Assignee

Sundstrand Corporation

Application

No. 850446 filed on 03/10/1992

US Classes:

415/52.1, WITH MEANS FOR RE-ENTRY OF WORKING FLUID TO BLADE SET (E.G., RE-ENTRY TYPE DEVICE, PASSAGE, ETC.)415/55.1, Turbine regenerative pump416/184Spaced intermediate ends of opposed axial flow impeller

Examiners

Primary: Look, Edward K.
Assistant: Sgantzos, Mark

Attorney, Agent or Firm

Wood, Phillips, VanSanten, Hoffman & Ertel

Foreign Patent References

0209092 DE2 05/19/2013
0765809 DE 11/19/2013

International Class

F01D 001/12

Abstract

Poor inlet suction characteristics in regenerative pumps may be avoided in a construction including a housing (10) having an impeller receiving cavity (20) with a circular impeller (22) therein. Channel-like annular grooves (32, 34) are disposed in the housing (10) and open to the cavity (20) at sides (36, 38) of the impeller (22). An outlet seal (63) is located in each of the grooves (32, 34) and outlet ports (62) opening to the grooves (32, 34) are located just upstream of the outlet seal (63). Peripheral recesses (42, 44) are located in the impeller sides (36, 38) and have radially inner extremities (59) located radially inward of the channels (32, 34). A plurality of blades (52) are mounted to the impeller (22) within the recesses (42, 44) around the periphery thereof and have radially inner edges (54) spaced from the radially inner recess extremities (59) while being isolated from recirculation within the channels ( 32, 34). An inlet port (70) is disposed in the housing (10) and is located between the radially inner extremity of the grooves (42, 44) and the radially inner edges (54) of the blades (52).