GB676406A - Improvements in fan impellers - Google Patents
Improvements in fan impellersInfo
- Publication number
- GB676406A GB676406A GB2693450A GB2693450A GB676406A GB 676406 A GB676406 A GB 676406A GB 2693450 A GB2693450 A GB 2693450A GB 2693450 A GB2693450 A GB 2693450A GB 676406 A GB676406 A GB 676406A
- Authority
- GB
- United Kingdom
- Prior art keywords
- degrees
- impeller
- angle
- plane
- respect
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
676,406. Screw fans. SPENCER, T. D., and PATENT LIGHTING CO., Ltd. Nov. 3, 1950. No. 26934/50. Class 110(i) A fan impeller comprises a boss and four blades integral therewith, wherein the leading edge 10 of each blade is substantially straight as viewed in the direction of the impeller axis, and the blade width is greater near the inner end of the blade than near the outer end and is not less than one-fifth (and may be one-quarter) of the impeller diameter at a distance from the impeller axis not greater than one-sixth of the impeller diameter. The trailing edge 12 is displaced axially of the impeller with respect to the leading edge 10, with which a substantial portion of its radially outer part makes an angle of 5 degrees and 25 degrees, but preferably 17 degrees. The inner trailing portion 13 is curved in such a manner that the generator of its concave surface is a substantially straight line 14-14, which always remains parallel to itself. The line 14-14 makes a trailing angle of 15 degrees to 35 degrees, but preferably 25 degrees, with a perpendicular X-X from the middle of the blade tip to the impeller axis. Preferably, the leading edge 10 is in a plane of rotation, but may lie between a backward angle of 10 degrees, and a forward angle of 15 degrees, with respect to the plane. Its pitch angle with respect to the plane may be slightly positive or negative. As shown, it preferably makes a leading angle with respect to the line X-X. The impeller boss extends from the plane of rotation of the leading edge 10 towards the plane of rotation of the most rearward part of the trailing edge 12 by a distance equal to at least half, and preferably three-quarters, of the distance between the two planes. The impeller is moulded from synthetic resin, or is diecast. Specification 502,740, [Group XXXIII]., is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2693450A GB676406A (en) | 1950-11-03 | 1950-11-03 | Improvements in fan impellers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2693450A GB676406A (en) | 1950-11-03 | 1950-11-03 | Improvements in fan impellers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB676406A true GB676406A (en) | 1952-07-23 |
Family
ID=10251510
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2693450A Expired GB676406A (en) | 1950-11-03 | 1950-11-03 | Improvements in fan impellers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB676406A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2995191A (en) * | 1958-04-21 | 1961-08-08 | Westinghouse Electric Corp | Fan apparatus |
US3014534A (en) * | 1957-04-16 | 1961-12-26 | Enso Gutzeit Oy | Impeller, propeller and the like for producing axial effect, particularly axial air flow |
EP0877167A1 (en) * | 1996-11-12 | 1998-11-11 | Daikin Industries, Limited | Axial fan |
US6039541A (en) * | 1998-04-07 | 2000-03-21 | University Of Central Florida | High efficiency ceiling fan |
US6659721B1 (en) | 1998-04-07 | 2003-12-09 | University Of Central Florida | High efficiency ceiling fan blades |
US6719533B2 (en) | 2002-07-11 | 2004-04-13 | Hunter Fan Company | High efficiency ceiling fan |
US6719532B2 (en) | 2002-07-11 | 2004-04-13 | Hunter Fan Company | High efficiency ceiling fan |
US6733241B2 (en) | 2002-07-11 | 2004-05-11 | Hunter Fan Company | High efficiency ceiling fan |
US6884034B1 (en) | 1998-04-07 | 2005-04-26 | University Of Central Florida | Enhancements to high efficiency ceiling fan |
US7131819B2 (en) | 2002-07-11 | 2006-11-07 | Hunter Fan Company | High efficiency ceiling fan |
US7210910B1 (en) | 1998-04-07 | 2007-05-01 | Research Foundation Of The University Of Central Florida, Inc. | Enhancements to high efficiency ceiling fan |
US7413410B2 (en) | 2005-03-21 | 2008-08-19 | Hunter Fan Company | Ceiling fan blade |
-
1950
- 1950-11-03 GB GB2693450A patent/GB676406A/en not_active Expired
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3014534A (en) * | 1957-04-16 | 1961-12-26 | Enso Gutzeit Oy | Impeller, propeller and the like for producing axial effect, particularly axial air flow |
US2995191A (en) * | 1958-04-21 | 1961-08-08 | Westinghouse Electric Corp | Fan apparatus |
EP0877167A4 (en) * | 1996-11-12 | 2002-12-04 | Daikin Ind Ltd | Axial fan |
EP0877167A1 (en) * | 1996-11-12 | 1998-11-11 | Daikin Industries, Limited | Axial fan |
US6884034B1 (en) | 1998-04-07 | 2005-04-26 | University Of Central Florida | Enhancements to high efficiency ceiling fan |
US6659721B1 (en) | 1998-04-07 | 2003-12-09 | University Of Central Florida | High efficiency ceiling fan blades |
US6039541A (en) * | 1998-04-07 | 2000-03-21 | University Of Central Florida | High efficiency ceiling fan |
US7210910B1 (en) | 1998-04-07 | 2007-05-01 | Research Foundation Of The University Of Central Florida, Inc. | Enhancements to high efficiency ceiling fan |
US6719533B2 (en) | 2002-07-11 | 2004-04-13 | Hunter Fan Company | High efficiency ceiling fan |
US6719532B2 (en) | 2002-07-11 | 2004-04-13 | Hunter Fan Company | High efficiency ceiling fan |
US6733241B2 (en) | 2002-07-11 | 2004-05-11 | Hunter Fan Company | High efficiency ceiling fan |
US7131819B2 (en) | 2002-07-11 | 2006-11-07 | Hunter Fan Company | High efficiency ceiling fan |
US7413410B2 (en) | 2005-03-21 | 2008-08-19 | Hunter Fan Company | Ceiling fan blade |
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