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Publication numberUS1919250 A
Publication typeGrant
Publication dateJul 25, 1933
Filing dateNov 6, 1931
Priority dateNov 6, 1931
Publication numberUS 1919250 A, US 1919250A, US-A-1919250, US1919250 A, US1919250A
InventorsOlson Alex H
Original AssigneeJoseph W Droll
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Propeller wheel for fans
US 1919250 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

July 25, 1933. A. H. oLsoN PROPELLER WHEEL FOR FANS Filed Nov. 6. 1931 @IWM Patented July 25, 1933 UNITED STATES PATENT OFFICE;

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cmcaso, rumors 2302mm 'wnnar. ron rans Application filed Iovenber .a, 19:1. semi 10. 57 8.8 18.

The invention relates to propeller wheels for fans.

It isv now common practice to provide sta- .tionary deflectors in front of the propeller U wheels of ventilating fans to deflect the air projected axiall by-the fan obliquely outward to spread t e air over a wide area- The pnmaryobject of the inventionis to front of the center. of the fan. The front edge'15 and the rear edge 15 of member 15 are helical or curved or slo 'd rearwardly with respect to a diametric line.

may for descri tive purposes be regarded as connecting wit the member 15 on the line 181 8 of Fig. 3, is tan ntial. or inclined to I The front .face of the intermediate member17, which propeller wheel for fans which will operate the plane of rotation of t wheel, and its ont er portion is curved .rearwardly axially to provide a surface which will propel the air obliquel frontwardl and outwardly in gradual increasing e ee from the axis of the whee The front edge 17 and the back edge 17 b of the intermediate member 17 are provide a pro ller wheel which is provided with blades w 'ch will efliciently spread the air over a widely flared zone to distribute it over a large portion of the room, so that separate deflectors for this urpose can be dispensed with. Another ject is to provide a 35 of sheet metal.

efliciently. Other objects will appear from the description. I

The invention consists in the several novel features hereinafter set forth and more par- 573 ticularly defined by claims at the conclusion hereof.

In the drawing: Fig. 1 is a front elevation of a fan embodying the invention. Fig. 2 is a side elevation. Fig. 3 is a. front view of 25 one of the propeller blades. Fig. 4 is a rear end view of one of the blades. Fig. 5 is a plan of one of the blades. Fi 6 is a section on the line 6-6 of Fig. 3. tion on the line 7-7 of 3.

The invention is exemp ed in a propeller wheel secured to the shaft 10 of an electric motor 11 which may be of any suitable construction. The wheel comprises a series of ig. 7 is a secfour blades 14 which are preferabl formed its face is inclined transversely to the plane of rotation as shown in Fig. 7, to propel the air forwardly of the wheel while the latter is rotated. The front face of member 15 is also inclined frontwardl as shown in Fig. 6,

to propel the air slight y toward the center ofthefanandprdventadea'd-airspacein gressively in the rotation of the wheel.

may or descri tive purposes be re also helical or curved backwardly relatively to a diametric line and in the plane of-rotationto cause the blade to act on the air gr}? air tends to slide radially outward and backwardly over the front face of the inner portion of the member 17, and this formation causes the air to be effectively ropelled obliquely forward. The tip mem r 16, wlich rde as merging with t e intermediate portion on the 'line 19-19 of Fig. 5, is extended totrail the member 17 in the rotation of the wheel, is curved longitudinally of the axis and the same as the outer end of the member 17. The tip is tangential to render it efiective in re pelling the air outwardly from the axis of the wheel. Its edges 16 and 16 terminate in a int-16. I The tip constitutes a sweep-back ormation to act suvely on the air which has a tendency to slide over thefront face of the blade.

In operation the inner members 15, by reason oftheir transverseinclination and their frontward and outward inclination propel air frontwardly and sufieiently towards the axis to prevent the formation of a dead-air s ace in the central zone in front'o'f the wheel.

e intermediate members 17, b reason of being tangential and their meg rearward slo propel-the air obliquely fmntwardly an outwardly from the axis pvely increasing degrees to distribute the air through a wide conoidal zone. .By reason of e sweep-back of the portion, the air slipping along their faces will be effectively propelled by these members. The tips which trial and intermediate ortions in the rotation of the blades render them more effective in propelling the air in the outer portion of the conoidal zone of air propelled by the wheel and prevent the formation of eddy currents which would lessen the efiiciency of the intermediate members of the blades. The wheel in its entirety propels a substantially conoidal 90 zone of air as indicatedin Fig. 2', with substantially uniform pressure throughout the entire zone and thus effects the desired wide distribution of the air under moderate pressure over a wide area in a room.

The invention exemplifies an air propeller- Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is:

1. As a new article of manufacture, a wheel for propelling air comprising a hub adapted for connection to a drive shaft, and a plurality of blades connected to and projecting outwardly from the hub, each of said blades consisting of an outwardly flared, transversely inclined inner part extending outwardly from the hub and having the leading and trailing edges thereof curved rearwardly with respect to the direction of rotation of the wheel in a substantially spiral manner, an intermediate part extending outwardly and backwardly from the outer portion of the inner part and rearwardly with respect to the direction of rotation of the wheel and shaped so as to propel another portion of the propelled air forwardly and outwardly in' gradually increasing degree vfrom the axis of rotation, and a tapered tip extending backwardly from the rearmost portion of the intermediate part substantially longitudinally withrespect to the axis of rotation of the wheel constituting a sweep-back formation whereby the air sliding off the rearmost part of the intermediate part is Ideflected outwardly during rotation of the v; ee

2. As a new article of manufacture, a. wheel for propelling air comprising a hub adapted for connection to a drive shaft, and a plurality of'blades connected to and projecting outwardly from the hub, each of said blades consisting of an outwardly flared, transversely inclined inner part extending outwardly and slightly forwardly from the hub so as to defi eat a portion of the propelled air inwardly towards the axis of rotation and prevent the formation of a dead-air space in front of the center of the wheel and having the leading and trailing edges thereof curved rearwardly with respect to the direction of rotation of the wheel in a substantially spiral manner, an intcrmedi ate part extending outwardly and backwardly from the outer portion of the inner part and rearwardly with respect to the direction of rotation of the wheel and shaped so as to propel another portion of the propelled air forwardly and outwardly in. gradually increasing degree from the axis of rotation, and a tapered tip extending backwardly from the rearmost portion of the intermediate part substantially longitudinally .with respect to the axis of rotation of the wheel constituting a sweep-back formation whereby the air sliding off the rearmost part of the intermediate part is deflected outwardly during rotation of the wheel.

ALExH. OLSON,

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4505641 *Dec 22, 1983Mar 19, 1985Aisin Seiki Kabushiki KaishaCooling fan for internal combustion engine
US6702552 *Nov 24, 2000Mar 9, 2004Jayden David HarmanImpeller having blade(s) conforming to the golden section of a logarithmic curve
US7096934Jul 1, 2004Aug 29, 2006Pax Scientific, Inc.Heat exchanger
US7287580Jan 3, 2003Oct 30, 2007Pax Scientific, Inc.Heat exchanger
US7416385Jul 28, 2006Aug 26, 2008Pax Streamline, Inc.Housing for a centrifugal fan, pump, or turbine
US7488151Jul 28, 2006Feb 10, 2009Pax Streamline, Inc.Vortical flow rotor
US7644804Jan 12, 2010Pax Streamline, Inc.Sound attenuator
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US7814967Oct 19, 2010New Pax, Inc.Heat exchanger
US7832984Nov 16, 2010Caitin, Inc.Housing for a centrifugal fan, pump, or turbine
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US8128338 *Nov 11, 2005Mar 6, 2012Kabushiki Kaisha BellsionPropeller and horizontal-axis wind turbine
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US8381870Feb 26, 2013Pax Scientific, Inc.Fluid flow controller
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US20040238163 *Jul 1, 2004Dec 2, 2004Harman Jayden DavidHeat exchanger
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US20050269458 *Jul 2, 2004Dec 8, 2005Harman Jayden DVortex ring generator
US20060102239 *Dec 29, 2005May 18, 2006Pax Scientific, Inc.Fluid flow control device
US20060249283 *Jan 3, 2003Nov 9, 2006Pax Scientific, Inc.Heat exchanger
US20060263201 *May 4, 2006Nov 23, 2006Harman Jayden DFluid circulation system
US20070003414 *Jul 28, 2006Jan 4, 2007Pax Scientific, Inc.Housing for a centrifugal fan, pump, or turbine
US20070025846 *Jul 28, 2006Feb 1, 2007Pax Scientific, Inc.Vortical flow rotor
US20080023188 *Jul 7, 2007Jan 31, 2008Harman Jayden DHeat Exchanger
US20080041474 *Oct 25, 2007Feb 21, 2008Harman Jayden DFluid Flow Controller
US20080093860 *Nov 11, 2005Apr 24, 2008Masahiko SuzukiPropeller And Horizontal-Axis Wind Turbine
US20080265101 *Oct 29, 2007Oct 30, 2008Pax Scientific, Inc.Vortex ring generator
US20090035132 *Aug 5, 2008Feb 5, 2009Pax Streamline, Inc.Housing for a centrifugal fan, pump, or turbine
US20090308472 *Jun 15, 2009Dec 17, 2009Jayden David HarmanSwirl Inducer
US20110011463 *Jan 20, 2011Jayden David HarmanReducing drag on a mobile body
Classifications
U.S. Classification416/238
International ClassificationF04D29/32
Cooperative ClassificationF04D29/325
European ClassificationF04D29/32K