CA1050508A - Sheet metal fan assembly - Google Patents
Sheet metal fan assemblyInfo
- Publication number
- CA1050508A CA1050508A CA269,528A CA269528A CA1050508A CA 1050508 A CA1050508 A CA 1050508A CA 269528 A CA269528 A CA 269528A CA 1050508 A CA1050508 A CA 1050508A
- Authority
- CA
- Canada
- Prior art keywords
- blade
- sheet metal
- fan assembly
- tip
- fan
- 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
Abstract
ABSTRACT OF THE DISCLOSURE
A sheet metal fan exhibiting special utility as a radiator fan for an internal combustion engine. A
spider carries the blades on its arms, the arms each hav-ing a radially extending stiffening rib in opposed rela-tion to a complementary rib in its blade to thereby form a tube where the stiffening ribs are radially coextensive.
The stiffening rib on each blade intersects a continuous, blade stiffening channel.
A sheet metal fan exhibiting special utility as a radiator fan for an internal combustion engine. A
spider carries the blades on its arms, the arms each hav-ing a radially extending stiffening rib in opposed rela-tion to a complementary rib in its blade to thereby form a tube where the stiffening ribs are radially coextensive.
The stiffening rib on each blade intersects a continuous, blade stiffening channel.
Description
~CI51)~
This invention relates to a sheet metal fan assembly of the type particularly a~apted for use with the cooling system of an internal combustion engine mounted in an automotive vehicle. A typical example of the utility of the fan assembly of this invention is between the radiator and the engine of an automotive vehicle. The fan draws air from ambience through the radiator thereby to assist in cooling the liquid which has transferred heat from the interior o~ the engine to the radiator. Such fans are well known, exist in a wide variety of forms and have enjoyed the attention of numerous workers in this art.
One common form of such a fan construction is defined by a sheet metal hub or spider having arms pro-~ jecting radially outwardly. Each arm carries an associat-¦~15 ed blade which may be attached as by welding, riveting, or the like. Either the blade or the attaching arm or both may be twi~sted so æs to vary the pitch of the fan. The spider hub is attached to a pulley or other rotary member whlch is powered by the engine. Examples of such prior ~20 ~ ~ art~ sheet metal fan constructions are given by the follow- :
~` ~ ing patents: U.S. 295,449, issued to S~ith; 1,041,913 issued ~ ~ .
to Tyson; 1,117,103, issued to Steinbach; 1,255,346, issued to Sparks; 1,404,298, issued to Jacobs; 1,597,175, issued to -~
Boening; 1,868,528, issued to Gardner; 2,681,708, issued `
to Mix; 2,906,349, issued to Hans; 3,147,811, issued to Klonoski; 3,147,958, issued to ~tiffler; 3,827,8~2, issued to Pope; British Patent Noi ~17,232; German Patent No. 762,625; alld British Patent No. 908,586. It will be understood that~these patents do not necessarily define ~30 all of the prior art.
.. . .
This invention relates to a sheet metal fan assembly of the type particularly a~apted for use with the cooling system of an internal combustion engine mounted in an automotive vehicle. A typical example of the utility of the fan assembly of this invention is between the radiator and the engine of an automotive vehicle. The fan draws air from ambience through the radiator thereby to assist in cooling the liquid which has transferred heat from the interior o~ the engine to the radiator. Such fans are well known, exist in a wide variety of forms and have enjoyed the attention of numerous workers in this art.
One common form of such a fan construction is defined by a sheet metal hub or spider having arms pro-~ jecting radially outwardly. Each arm carries an associat-¦~15 ed blade which may be attached as by welding, riveting, or the like. Either the blade or the attaching arm or both may be twi~sted so æs to vary the pitch of the fan. The spider hub is attached to a pulley or other rotary member whlch is powered by the engine. Examples of such prior ~20 ~ ~ art~ sheet metal fan constructions are given by the follow- :
~` ~ ing patents: U.S. 295,449, issued to S~ith; 1,041,913 issued ~ ~ .
to Tyson; 1,117,103, issued to Steinbach; 1,255,346, issued to Sparks; 1,404,298, issued to Jacobs; 1,597,175, issued to -~
Boening; 1,868,528, issued to Gardner; 2,681,708, issued `
to Mix; 2,906,349, issued to Hans; 3,147,811, issued to Klonoski; 3,147,958, issued to ~tiffler; 3,827,8~2, issued to Pope; British Patent Noi ~17,232; German Patent No. 762,625; alld British Patent No. 908,586. It will be understood that~these patents do not necessarily define ~30 all of the prior art.
.. . .
-2- ~
, .
~61 5a~
There is provided a sheet metal fan assembly adapted to be placed between an internal combustion engine . and its radiator with a limited spacing being allotted : therebetween for the blades of the fan assembly, said ~ :
~ 5 fan assembly comprising a sheet metal hub having a ;~ plurality of radially projecting arms and a sheet metal : fan blade attached to and projecting radially from each arm; each blade being of generally rectangular configura~
tion in plane and of a substantially constant width and having the major portion of its length, exclusive of a tip portion $hereof, curved into a part-cylindrical shape ., centered about an axis parallel to the longitudinal axis , of that blade, each blade being twisted out of the plane :~-'~ of said hub whereby the opposite sides of each said major portion of a blade projects a width in a direction parallel :
. to the axis of rotation which is less than said allotted j space between an engine and a radiator and said tip has a ;~ forward bend relative to said blade major portion with the --forward bend of said tip being such that the leading edge ;.i 20 o~ said tip o~ each blade extends the projected width ~- .
of said blade in that region to the full extent of said .
1 allotted space between an engine and a radiator. - ~:
'i ' . ' IN THE DRAWIMGS:
Figure 1 is a plan view of a typical sheet metal fan blade construction according to the practice of this invention.
Figure 2 is a view taken along section 2-2 of Figure 1. , . :
:~ Figure 3 is an enlarged view of a typical fan . ` .
, 30 blade and spider arm of Figure 1.
., ,~, ' , ;.' ''.
Figure 4 is a sectioll taken along section line 4-4 of Fig. 3.
Figure 5 is a section taken along section line 5-5 of ~ig. 3.
~igure 6 is a radial section taken along section line 6-6 of Fig. 3.
Referring now to the drawings, the numeral 10 denotes generally the sheet metal fan assembly of this invention and is defined by a sheet metal hub 12 having a plurality of angularly spaced arms 14. The hub 12 is sometimes referred to as a spider and the arms as spider ~, arms. The numeral 16 denotes a typical fan blade accord-ing to this construction, the radially outermost portion 18 of the blade being curved away from the remainder of j 15 the blade. Each blade is in the general form of a part-~ cyllnder surface, with the bent portion 18 extending along;'! the entire width of the blade and away from the general plane of the blade. The numeral 20 d~enotes one leg of a reinforcing channel (rib) while the numeral 22 denotes a similar channel. The two channels 20 and 22 are of ' ~ ; generally U-shaped and merge with each other and with the ~;
radial rib 30 in the channel portion 24, forming a branch-,1 .ed rib configuration of generally Y-shape. The rib 30 extends from the radially innermost portion of` each blade 16 and intersects the radially innermost portion o~ the , :: :
1 closed loop. Both the reinforcing channel 20, 22, 24 and ~ ~ the reinforcing rib 30 bulge outwardly from the forward s ~ side of the blade, both the reinforcing rib 30 and the .
, ~ reinforcing channel be1ng of the same depth.
The numeral 32 denotes rivets employed to fasten s -. ' ' ' '''' '';
~` each blade 16 to its associated spider arm 14. One of the rivets is inside of the branched reinforcing channel.,. ~ :
while the other two are outside of it, one lying on one side of the reinforcing rib 30 and the other on the other .` 5 side of the reinforcing rib 30.
The spider or hub 12 is provided wi.th a side wall 40 joining the inner portion 41 with the marginal ~ .
.. , flange 46. As will be seen from Figures 3 and 4, each arm , 14 presents a forwardly facing mounting pad surface 45 - .
.; 10 which is displaced radially outwardly from the hub 12 and ~i . . . ~ .
.. ' is of generally triangular shape. This mounting pad sur~
,1 face is flat and is twisted from the plane of the marginal .
~`~I - flange 46 but merges smoothly therewith as indicated at .-i 46'. The inner end of each blade similarly is provided -~ . . .
I 15 with a flat, generally triangular area 4~ whose rear face .:
'~ is securely affixed against the mounting pad surface 45.
j Each arm 14 is provided with a channel or trough .:
44 which interrupts the wall 40 as shown iD Figure 3 and 1~ thereby merges smoothly with the forward surface of the -~I 20 inner portion 41 of the hub, extending radially therefrom :¦ into the mounting pad surface 45 to terminate short of the ! :
j't~ area of the outermost rivet, as.shown in broken lines in i Figure 2. The trough or channel 44 bulges rearwardly from
, .
~61 5a~
There is provided a sheet metal fan assembly adapted to be placed between an internal combustion engine . and its radiator with a limited spacing being allotted : therebetween for the blades of the fan assembly, said ~ :
~ 5 fan assembly comprising a sheet metal hub having a ;~ plurality of radially projecting arms and a sheet metal : fan blade attached to and projecting radially from each arm; each blade being of generally rectangular configura~
tion in plane and of a substantially constant width and having the major portion of its length, exclusive of a tip portion $hereof, curved into a part-cylindrical shape ., centered about an axis parallel to the longitudinal axis , of that blade, each blade being twisted out of the plane :~-'~ of said hub whereby the opposite sides of each said major portion of a blade projects a width in a direction parallel :
. to the axis of rotation which is less than said allotted j space between an engine and a radiator and said tip has a ;~ forward bend relative to said blade major portion with the --forward bend of said tip being such that the leading edge ;.i 20 o~ said tip o~ each blade extends the projected width ~- .
of said blade in that region to the full extent of said .
1 allotted space between an engine and a radiator. - ~:
'i ' . ' IN THE DRAWIMGS:
Figure 1 is a plan view of a typical sheet metal fan blade construction according to the practice of this invention.
Figure 2 is a view taken along section 2-2 of Figure 1. , . :
:~ Figure 3 is an enlarged view of a typical fan . ` .
, 30 blade and spider arm of Figure 1.
., ,~, ' , ;.' ''.
Figure 4 is a sectioll taken along section line 4-4 of Fig. 3.
Figure 5 is a section taken along section line 5-5 of ~ig. 3.
~igure 6 is a radial section taken along section line 6-6 of Fig. 3.
Referring now to the drawings, the numeral 10 denotes generally the sheet metal fan assembly of this invention and is defined by a sheet metal hub 12 having a plurality of angularly spaced arms 14. The hub 12 is sometimes referred to as a spider and the arms as spider ~, arms. The numeral 16 denotes a typical fan blade accord-ing to this construction, the radially outermost portion 18 of the blade being curved away from the remainder of j 15 the blade. Each blade is in the general form of a part-~ cyllnder surface, with the bent portion 18 extending along;'! the entire width of the blade and away from the general plane of the blade. The numeral 20 d~enotes one leg of a reinforcing channel (rib) while the numeral 22 denotes a similar channel. The two channels 20 and 22 are of ' ~ ; generally U-shaped and merge with each other and with the ~;
radial rib 30 in the channel portion 24, forming a branch-,1 .ed rib configuration of generally Y-shape. The rib 30 extends from the radially innermost portion of` each blade 16 and intersects the radially innermost portion o~ the , :: :
1 closed loop. Both the reinforcing channel 20, 22, 24 and ~ ~ the reinforcing rib 30 bulge outwardly from the forward s ~ side of the blade, both the reinforcing rib 30 and the .
, ~ reinforcing channel be1ng of the same depth.
The numeral 32 denotes rivets employed to fasten s -. ' ' ' '''' '';
~` each blade 16 to its associated spider arm 14. One of the rivets is inside of the branched reinforcing channel.,. ~ :
while the other two are outside of it, one lying on one side of the reinforcing rib 30 and the other on the other .` 5 side of the reinforcing rib 30.
The spider or hub 12 is provided wi.th a side wall 40 joining the inner portion 41 with the marginal ~ .
.. , flange 46. As will be seen from Figures 3 and 4, each arm , 14 presents a forwardly facing mounting pad surface 45 - .
.; 10 which is displaced radially outwardly from the hub 12 and ~i . . . ~ .
.. ' is of generally triangular shape. This mounting pad sur~
,1 face is flat and is twisted from the plane of the marginal .
~`~I - flange 46 but merges smoothly therewith as indicated at .-i 46'. The inner end of each blade similarly is provided -~ . . .
I 15 with a flat, generally triangular area 4~ whose rear face .:
'~ is securely affixed against the mounting pad surface 45.
j Each arm 14 is provided with a channel or trough .:
44 which interrupts the wall 40 as shown iD Figure 3 and 1~ thereby merges smoothly with the forward surface of the -~I 20 inner portion 41 of the hub, extending radially therefrom :¦ into the mounting pad surface 45 to terminate short of the ! :
j't~ area of the outermost rivet, as.shown in broken lines in i Figure 2. The trough or channel 44 bulges rearwardly from
-3 the arm 14 and defines the radially~extending reinforcing ~.
'~1 :. : .
.~ 25 rib 44'. The two ribs 44' and 30 are registered to form a ..
-, tube-like reinforcing structure as is illustrated in I Figures 5 and 6.
, The surface of the fan blade 16 in the region ; of the rivets 32 is flat, as is the surface of the arm 14, . : . , :
~ 30 except for the reinforcing rib 30 and the reinforcing rib : .
' i .:'f .,'. .'.. '.' " ' - -5~ .
.
.1 , , ~, "', ;. .
44'. The radially outermost portion of the spider 12 terminates in a flange denoted by the numeral 46. As may be observed particularly from Fig. 2, the spider arms 14 are twisted relative to the plane of the spider hub 12 to define the pitch of the blades.
The reader will note that an imaginary line drawn from the outermost rivet 32 inside the reinforcing channel to either of the other two rivets intersects orthogonally the channel portion 24.
A typical sheet metal fan blade failure occurs under the action of the first mode of resonance of the spider arm. Bending will typically ocGur about the attach~
, ment points defined by rivets 32. In the presen~ con-struction, bending of fan blade 16 (see Fig. 3) about an ~ imaginary axis from the inner rivet '32 to either of the two outer rivets 32 will be at right angles to the rein-., .
forcing channel portion 24 and accordingly the blade 16 of this inven~ion will be better able to resist failure be~
cause of this geometrical relationship. The reader will also observe that one of the strongest structural shapes ~:
l~ is a triangle and is the general relationship of the ., .
,~ reinforcing ribs 20, 22, 24~ That is to say, one of the ~ sides 20, 22, 24 is not easily distorted while leaving the -i other two sides free from distortion. The reader will ., .
also observe that the rib 30 at the radially innermost portion of each fan blade 16 gives continuity and radial stiffness relative to the spider hub 12, the rib 44' and the rib 30 opposing each other to yield such continuity.
It will be observed particularly from Fig. 2 of the draw-ings that the hub 12 is in the general form of a dish.
' .~
' ' ., :.
! 6 ,( :' ., , , .,, .. ~.": , ., , ', . :.. ~ ; .. ,, :
1 [)SOS~
This results in a i`orward offset and permits center pierc-ing or rearward offset of the blade with a minimal dimen-sion required be~ween the mounting surface and the rear of the assembly, A typical fan blade assembly fashioned in accordance with this invention employs a reinf'orcing channel 20, 22, 24 and reinforcing rib 30 of approximately 5/16 inch width at approximately 0.30 inches de,ep, Typi-cal prior art reinforcing channels in ribs have employed depths of the order of 0.120 inches. This relatively high -ratio between the depth of the channels or ribs and their width permits the use of thinner metal for the fan blades.
Another advantage displayed by this construction is the greater radial air flow causecl by the tip of each `' '' ' blade being beDt towards the suction side of the fan , l~ 15 assembly.
Another advantage displayed by this construction , ,~ is the greater radial air flow caused by the tip of each blade being bent towards the suction side of the fan assembly, i.e., towards the radiator. As noted, greater . .
`,~ 20 radlal air ~low improves the cooling efficiency of a fan assembly.
~ In Fig. 2, the bend of each tip is toward the ,~ right, the tlps extending beyond the projected width of ~,, the fan assembl~. The projected width of a fan assembly ~ . . .
;~ 25 is its width as viewed at right angles to the axis of ro- , '~ tation of the fan assembly. The numeral 19 designates " , ! the extension of the blade tips beyond the projected width , .j .
of the remainder of the fan, the latter denoted as P.~.
The fan blade tips thus define the widest part of the pro- :
~, 30 jected width of the fan assembly. ~
, ., '.' , ~ ., ., ' :, .
~L(3 5~5(1 ~
The rear face of the inner portlon 41 of the hub serves to mount the fan assembly to a member (not shown) driven by the engine. Often, the space T between the radiator and the engine block, represented respectively by the lines ~ and B in Fig. 2, is quite restricted and the space allotted for the fan assembly correspondingly has little depth. Because the engine block is close to and j immediately behind the fan blades, the air exhausted by the fan tends to impinge directly upon the engine block.
This not only restricts the flow of air but also causes ; the ~an to consume needless power. Consequently, fan blades of this type utilize forwardl~ bent tip portions in order to induce a radial, outward discharge flow of alr and thus decrease the mass flow of air impinging against lS the engine block. In customary practice, the forwardly bent fan blade tips are cut away generally along a line such as that indicated at 48 in Fig. 2 and the twist of the blade is adjusted so that the projected width o-~ the blade is equal to the distance W. FLowever, by making most of the blades of the smaller projected width P.W. as i: .
herein, and having the leading edge portion 49 of each ~ -blade tip present the maximum projected width, a lower consumption of fan power results while still obtaining the il j .
requisite flow of air through the radiator.
' , , .~ ,. ~, .
~, .'`'.
' ' ' -8- ~
. , ' .
'~1 :. : .
.~ 25 rib 44'. The two ribs 44' and 30 are registered to form a ..
-, tube-like reinforcing structure as is illustrated in I Figures 5 and 6.
, The surface of the fan blade 16 in the region ; of the rivets 32 is flat, as is the surface of the arm 14, . : . , :
~ 30 except for the reinforcing rib 30 and the reinforcing rib : .
' i .:'f .,'. .'.. '.' " ' - -5~ .
.
.1 , , ~, "', ;. .
44'. The radially outermost portion of the spider 12 terminates in a flange denoted by the numeral 46. As may be observed particularly from Fig. 2, the spider arms 14 are twisted relative to the plane of the spider hub 12 to define the pitch of the blades.
The reader will note that an imaginary line drawn from the outermost rivet 32 inside the reinforcing channel to either of the other two rivets intersects orthogonally the channel portion 24.
A typical sheet metal fan blade failure occurs under the action of the first mode of resonance of the spider arm. Bending will typically ocGur about the attach~
, ment points defined by rivets 32. In the presen~ con-struction, bending of fan blade 16 (see Fig. 3) about an ~ imaginary axis from the inner rivet '32 to either of the two outer rivets 32 will be at right angles to the rein-., .
forcing channel portion 24 and accordingly the blade 16 of this inven~ion will be better able to resist failure be~
cause of this geometrical relationship. The reader will also observe that one of the strongest structural shapes ~:
l~ is a triangle and is the general relationship of the ., .
,~ reinforcing ribs 20, 22, 24~ That is to say, one of the ~ sides 20, 22, 24 is not easily distorted while leaving the -i other two sides free from distortion. The reader will ., .
also observe that the rib 30 at the radially innermost portion of each fan blade 16 gives continuity and radial stiffness relative to the spider hub 12, the rib 44' and the rib 30 opposing each other to yield such continuity.
It will be observed particularly from Fig. 2 of the draw-ings that the hub 12 is in the general form of a dish.
' .~
' ' ., :.
! 6 ,( :' ., , , .,, .. ~.": , ., , ', . :.. ~ ; .. ,, :
1 [)SOS~
This results in a i`orward offset and permits center pierc-ing or rearward offset of the blade with a minimal dimen-sion required be~ween the mounting surface and the rear of the assembly, A typical fan blade assembly fashioned in accordance with this invention employs a reinf'orcing channel 20, 22, 24 and reinforcing rib 30 of approximately 5/16 inch width at approximately 0.30 inches de,ep, Typi-cal prior art reinforcing channels in ribs have employed depths of the order of 0.120 inches. This relatively high -ratio between the depth of the channels or ribs and their width permits the use of thinner metal for the fan blades.
Another advantage displayed by this construction is the greater radial air flow causecl by the tip of each `' '' ' blade being beDt towards the suction side of the fan , l~ 15 assembly.
Another advantage displayed by this construction , ,~ is the greater radial air flow caused by the tip of each blade being bent towards the suction side of the fan assembly, i.e., towards the radiator. As noted, greater . .
`,~ 20 radlal air ~low improves the cooling efficiency of a fan assembly.
~ In Fig. 2, the bend of each tip is toward the ,~ right, the tlps extending beyond the projected width of ~,, the fan assembl~. The projected width of a fan assembly ~ . . .
;~ 25 is its width as viewed at right angles to the axis of ro- , '~ tation of the fan assembly. The numeral 19 designates " , ! the extension of the blade tips beyond the projected width , .j .
of the remainder of the fan, the latter denoted as P.~.
The fan blade tips thus define the widest part of the pro- :
~, 30 jected width of the fan assembly. ~
, ., '.' , ~ ., ., ' :, .
~L(3 5~5(1 ~
The rear face of the inner portlon 41 of the hub serves to mount the fan assembly to a member (not shown) driven by the engine. Often, the space T between the radiator and the engine block, represented respectively by the lines ~ and B in Fig. 2, is quite restricted and the space allotted for the fan assembly correspondingly has little depth. Because the engine block is close to and j immediately behind the fan blades, the air exhausted by the fan tends to impinge directly upon the engine block.
This not only restricts the flow of air but also causes ; the ~an to consume needless power. Consequently, fan blades of this type utilize forwardl~ bent tip portions in order to induce a radial, outward discharge flow of alr and thus decrease the mass flow of air impinging against lS the engine block. In customary practice, the forwardly bent fan blade tips are cut away generally along a line such as that indicated at 48 in Fig. 2 and the twist of the blade is adjusted so that the projected width o-~ the blade is equal to the distance W. FLowever, by making most of the blades of the smaller projected width P.W. as i: .
herein, and having the leading edge portion 49 of each ~ -blade tip present the maximum projected width, a lower consumption of fan power results while still obtaining the il j .
requisite flow of air through the radiator.
' , , .~ ,. ~, .
~, .'`'.
' ' ' -8- ~
. , ' .
Claims
1. A sheet metal fan assembly adapted to be placed between an internal combustion engine and its radiator with a limited spacing being alloted there-between for the blades of the fan assembly, said fan assembly comprising:
a sheet metal hub having a plurality of radially projecting arms and a sheet metal fan blade attached to and projecting radially from each arm;
each blade being of generally rectangular con-figuration in plan and of a substantially constant width and having the major portion of its length, exclusive of a tip portion thereof, curved into a part-cylindrical shape centered about an axis parallel to the longitudinal axis of that blade, each blade being twisted out of the plane of said hub whereby the opposite sides of each said major portion of a blade projects a width in a direction parallel to the axis of rotation which is less than said allotted space between an engine and a radiator and said tip has a forward bend relative to said blade major portion with the forward bend of said tip being such that the leading edge of said tip of each blade extends the projected width of said blade in that region to the full extent of said allotted space between an engine and a radiator.
a sheet metal hub having a plurality of radially projecting arms and a sheet metal fan blade attached to and projecting radially from each arm;
each blade being of generally rectangular con-figuration in plan and of a substantially constant width and having the major portion of its length, exclusive of a tip portion thereof, curved into a part-cylindrical shape centered about an axis parallel to the longitudinal axis of that blade, each blade being twisted out of the plane of said hub whereby the opposite sides of each said major portion of a blade projects a width in a direction parallel to the axis of rotation which is less than said allotted space between an engine and a radiator and said tip has a forward bend relative to said blade major portion with the forward bend of said tip being such that the leading edge of said tip of each blade extends the projected width of said blade in that region to the full extent of said allotted space between an engine and a radiator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA269,528A CA1050508A (en) | 1977-01-12 | 1977-01-12 | Sheet metal fan assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA269,528A CA1050508A (en) | 1977-01-12 | 1977-01-12 | Sheet metal fan assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1050508A true CA1050508A (en) | 1979-03-13 |
Family
ID=4107711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA269,528A Expired CA1050508A (en) | 1977-01-12 | 1977-01-12 | Sheet metal fan assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1050508A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6712584B2 (en) | 2000-04-21 | 2004-03-30 | Revcor, Inc. | Fan blade |
| US6814545B2 (en) | 2000-04-21 | 2004-11-09 | Revcor, Inc. | Fan blade |
| US6942457B2 (en) | 2002-11-27 | 2005-09-13 | Revcor, Inc. | Fan assembly and method |
| CN107131157A (en) * | 2017-04-12 | 2017-09-05 | 唐山达创科技有限公司 | Heat sink and swing structure thereof |
-
1977
- 1977-01-12 CA CA269,528A patent/CA1050508A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6712584B2 (en) | 2000-04-21 | 2004-03-30 | Revcor, Inc. | Fan blade |
| US6814545B2 (en) | 2000-04-21 | 2004-11-09 | Revcor, Inc. | Fan blade |
| US6942457B2 (en) | 2002-11-27 | 2005-09-13 | Revcor, Inc. | Fan assembly and method |
| CN107131157A (en) * | 2017-04-12 | 2017-09-05 | 唐山达创科技有限公司 | Heat sink and swing structure thereof |
| CN107131157B (en) * | 2017-04-12 | 2023-07-28 | 唐山达创科技有限公司 | Heat dissipating device and swing structure thereof |
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