US1250681A - Fan-blade. - Google Patents
Fan-blade. Download PDFInfo
- Publication number
- US1250681A US1250681A US15872617A US15872617A US1250681A US 1250681 A US1250681 A US 1250681A US 15872617 A US15872617 A US 15872617A US 15872617 A US15872617 A US 15872617A US 1250681 A US1250681 A US 1250681A
- Authority
- US
- United States
- Prior art keywords
- blade
- fan
- loop
- edge
- fan blade
- 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 - Lifetime
Links
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
- A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
- A47J43/07—Parts or details, e.g. mixing tools, whipping tools
- A47J43/0705—Parts or details, e.g. mixing tools, whipping tools for machines with tools driven from the upper side
- A47J43/0711—Parts or details, e.g. mixing tools, whipping tools for machines with tools driven from the upper side mixing, whipping or cutting tools
-
- 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
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
-
- 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
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2210/00—Working fluid
- F05B2210/16—Air or water being indistinctly used as working fluid, i.e. the machine can work equally with air or water without any modification
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/50—Building or constructing in particular ways
- F05D2230/54—Building or constructing in particular ways by sheet metal manufacturing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/303—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the leading edge of a rotor blade
Definitions
- I,-SIDNEY RANDOLPH SHELDON of the city of Galt, in the county of Waterloo, in the province of Ontario
- My invention relates to improvements in fan blades and the object of the invention is to devise a fan blade so formed as to eliminate the sharp shrill noise caused by the sharp edge of the blade cutting through the air and to produce a low toned hum-- accordance with my invention mounted therein.
- Fig. 2 is a face elevation of a fragment of a fan showing a portion of the annular fan blade supporting plate broken away to exhibit the fan blade construction.
- Fig. 3 is a detail of an alternatecon struction of blade.
- V v '1 indicates the fan .frame' comprising the back plate 2 to which the hub 3 is secured and the annular front plate 4 spaced apart from the back plate 2 and between which the fan blades 5 extend in the usual manner.
- FIG. 2 have shown the loop, portion -6 separated from' the fan' blade and at tached thereto by rivets 7 passing through the fan blade and the free ends of the Inv Fig. 3,1 I have shown an alternative construction in which the loop'is made integral with theblade, the loop being formed by a blade extension which is turned in:
- This enlargement might also be constructed by casting a strip of metal of the required form having its outer edge rounded and its inner edge recessed so as to receive the, blade edge, such recessed portion being rivetedior otherwise secured to the blade.
- a high speed fan blade having its forward edge provided with a loop portion presenting .a rounded cutting edge.
- a high speed fan blade comprising a loop mem er extending from end to end of the forward edge of the blade and suitably secured thereto.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
S. R. SHELDON.
FAN BLADE.
APPLICATION man MR. 30 19!].
Patented D60 18, 1917.
.ing the blades and a blade constructed in 2 5 UNITED STATES PATENT OFFICE.
SIDNEY RANDOLPH'SHELDON, OF GAL'I, ONTARIO, CANADA.
FAN-BLADE.
Specification of Letters Patent.
Patented Dec. '18, 1917.
Application filed March so, 1917. Serial m5. 158,726.
To all whom it may concern: Y
Be it known that I,-SIDNEY RANDOLPH SHELDON, of the city of Galt, in the county of Waterloo, in the Province of Ontario,
Canada, have invented certain new and. useful Improvements in Fan-Blades, of which the following is the specification.
My invention relates to improvements in fan blades and the object of the invention is to devise a fan blade so formed as to eliminate the sharp shrill noise caused by the sharp edge of the blade cutting through the air and to produce a low toned hum-- accordance with my invention mounted therein. I
Fig. 2, is a face elevation of a fragment of a fan showing a portion of the annular fan blade supporting plate broken away to exhibit the fan blade construction.
Fig. 3, is a detail of an alternatecon struction of blade.
In the drawings like letters of reference indicate corresponding parts in the various figures. a V v '1 indicates the fan .frame' comprising the back plate 2 to which the hub 3 is secured and the annular front plate 4 spaced apart from the back plate 2 and between which the fan blades 5 extend in the usual manner.
Ordinarily a fan blade is made out-of a thin metal having a comparatively sharp edge which cuts -through the air producing a sharp shrill noise. To overcome this defect I have formed the front edge ofthe loop.
fan blade with an enlarged portion 6 preferably formed loop-shaped, the free endsof the loop. being secured to the upper and lower face of the blade, from which point the loop gradually spreads outward to form a substantiall semi-circular end.
In Fig. 2, have shown the loop, portion -6 separated from' the fan' blade and at tached thereto by rivets 7 passing through the fan blade and the free ends of the Inv Fig. 3,1 I have shown an alternative construction in which the loop'is made integral with theblade, the loop being formed by a blade extension which is turned in:
,wardly, and riveted to the lower face of the fan blade. This enlargement might also be constructed by casting a strip of metal of the required form having its outer edge rounded and its inner edge recessed so as to receive the, blade edge, such recessed portion being rivetedior otherwise secured to the blade.
It will thus be seen by this construction that I have provided a blade edge which has a broad rounded outer edge portion which in cutting through the air produces a low humming tone which will merge in with the general noise of a factory and be unnoticeable and will, therefore, eliminate the disagreeable sound commonly caused by a rotating fan.
What I claim as my invention is. 1. A high speed fan blade having its forward edge provided with a loop portion presenting .a rounded cutting edge. I
2. A high speed fan blade comprising a loop mem er extending from end to end of the forward edge of the blade and suitably secured thereto.
SIDNEY RANDOLIH SHELDON.
I Witnemes: G. T. OLINs,
A. P. WELLAND.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15872617A US1250681A (en) | 1917-03-30 | 1917-03-30 | Fan-blade. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15872617A US1250681A (en) | 1917-03-30 | 1917-03-30 | Fan-blade. |
Publications (1)
Publication Number | Publication Date |
---|---|
US1250681A true US1250681A (en) | 1917-12-18 |
Family
ID=3318407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15872617A Expired - Lifetime US1250681A (en) | 1917-03-30 | 1917-03-30 | Fan-blade. |
Country Status (1)
Country | Link |
---|---|
US (1) | US1250681A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2774308A (en) * | 1952-04-22 | 1956-12-18 | Ulander Per Helge Natanael | Radial flow impellers |
US3070287A (en) * | 1959-07-16 | 1962-12-25 | Eck Bruno | Drum rotor for radial blower |
US3093299A (en) * | 1961-05-15 | 1963-06-11 | Trane Co | Centrifugal fan |
US3406760A (en) * | 1967-09-18 | 1968-10-22 | Wallace Murray Corp | Flexible blade fan |
US3850545A (en) * | 1972-09-07 | 1974-11-26 | Hayes Albion Corp | Flex fan |
US4324529A (en) * | 1980-06-16 | 1982-04-13 | General Electric Co. | Axial-centrifugal flow impeller |
US5064346A (en) * | 1988-06-17 | 1991-11-12 | Matsushita Electric Industrial Co., Ltd. | Impeller of multiblade blower |
US5725354A (en) * | 1996-11-22 | 1998-03-10 | General Electric Company | Forward swept fan blade |
WO2015036497A1 (en) * | 2013-09-12 | 2015-03-19 | Nuovo Pignone Srl | Liquid tolerant impeller for centrifugal compressors |
US20180216627A1 (en) * | 2014-08-26 | 2018-08-02 | Ihc Holland Ie B.V. | Impeller blade with asymmetric thickness |
US20180274374A1 (en) * | 2015-09-28 | 2018-09-27 | Safran Aircraft Engines | Blade comprising a leading edge shield and method for producing the blade |
-
1917
- 1917-03-30 US US15872617A patent/US1250681A/en not_active Expired - Lifetime
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2774308A (en) * | 1952-04-22 | 1956-12-18 | Ulander Per Helge Natanael | Radial flow impellers |
US3070287A (en) * | 1959-07-16 | 1962-12-25 | Eck Bruno | Drum rotor for radial blower |
US3093299A (en) * | 1961-05-15 | 1963-06-11 | Trane Co | Centrifugal fan |
US3406760A (en) * | 1967-09-18 | 1968-10-22 | Wallace Murray Corp | Flexible blade fan |
US3850545A (en) * | 1972-09-07 | 1974-11-26 | Hayes Albion Corp | Flex fan |
US4324529A (en) * | 1980-06-16 | 1982-04-13 | General Electric Co. | Axial-centrifugal flow impeller |
US5064346A (en) * | 1988-06-17 | 1991-11-12 | Matsushita Electric Industrial Co., Ltd. | Impeller of multiblade blower |
US5725354A (en) * | 1996-11-22 | 1998-03-10 | General Electric Company | Forward swept fan blade |
WO2015036497A1 (en) * | 2013-09-12 | 2015-03-19 | Nuovo Pignone Srl | Liquid tolerant impeller for centrifugal compressors |
CN105723094A (en) * | 2013-09-12 | 2016-06-29 | 诺沃皮尼奥内股份有限公司 | Liquid tolerant impeller for centrifugal compressors |
US20160222980A1 (en) * | 2013-09-12 | 2016-08-04 | Nuovo Pignone Srl | Liquid tolerant impeller for centrifugal compressors |
JP2016531241A (en) * | 2013-09-12 | 2016-10-06 | ヌオーヴォ ピニォーネ ソチエタ レスポンサビリタ リミタータNuovo Pignone S.R.L. | Liquid-resistant impeller for centrifugal compressors |
CN105723094B (en) * | 2013-09-12 | 2019-02-26 | 诺沃皮尼奥内股份有限公司 | The impeller of tolerance liquid for centrifugal compressor |
US10920788B2 (en) | 2013-09-12 | 2021-02-16 | Nuovo Pignone Srl | Liquid tolerant impeller for centrifugal compressors |
US20180216627A1 (en) * | 2014-08-26 | 2018-08-02 | Ihc Holland Ie B.V. | Impeller blade with asymmetric thickness |
US20180274374A1 (en) * | 2015-09-28 | 2018-09-27 | Safran Aircraft Engines | Blade comprising a leading edge shield and method for producing the blade |
US11105210B2 (en) * | 2015-09-28 | 2021-08-31 | Safran Aircraft Engines | Blade comprising a leading edge shield and method for producing the blade |
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