USRE39117E1 - Blower - Google Patents

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Publication number
USRE39117E1
USRE39117E1 US10/807,229 US80722904A USRE39117E US RE39117 E1 USRE39117 E1 US RE39117E1 US 80722904 A US80722904 A US 80722904A US RE39117 E USRE39117 E US RE39117E
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United States
Prior art keywords
blades
casing
blower
body portion
cup shaped
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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
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US10/807,229
Inventor
Kaoru Matsumoto
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Minebea Co Ltd
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Minebea Co Ltd
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Publication date
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Priority to US10/807,229 priority Critical patent/USRE39117E1/en
Priority to US11/131,769 priority patent/USRE39787E1/en
Application granted granted Critical
Publication of USRE39117E1 publication Critical patent/USRE39117E1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system

Definitions

  • the present invention relates to an improvement of a blower for use in various kinds of office automation apparatus.
  • an air vent for attaching a blower therein is provided in a side wall of an apparatus to discharge the heat inside to the outside of the apparatus, thereby preventing damage due to the heat generated inside.
  • Sign 1 shows a casing which is tubular.
  • An integrally molded housing 2 is provided on the right in FIG. 3 inside the casing 1 .
  • a bearing linear 3 is inserted into the housing 2 .
  • Outer races of bearings 4 and 5 are supported by the inner side of the bearing liner 3 , and a shaft 6 is inserted into the inner races of the bearings 4 and 5 .
  • a race 7 is attached to the lower end of the shaft 6 for preventing the shaft 6 from falling off and for axially positioning the shaft 6 .
  • Knurl 8 is provided on the upper end of the shaft 6 , and is fixed to a boss 9 formed by die casting zinc.
  • Springs 10 are provided between the boss 9 and the inner race of the bearing 4 for providing thrust load on the bearing 4 .
  • a center portion of a cup-like motor yoke 11 is fixed to the boss 9 .
  • On the boss 9 the central portion of a cup shaped yoke 11 is fixed, and on the inner peripheral portion, a ring shaped magnet 12 is fixed.
  • a body portion 15 of an impeller 14 provided with blades 13 is fixed to the outer peripheral portion of the motor yoke 11 .
  • the shaft 6 , the motor yoke 11 and the impeller 14 form a rotating portion.
  • a pin-like connection terminal 18 is provided in a projected manner from the stator core 17 downwardly to pierce a PC board 19 supported by the housing 2 .
  • An electronic circuit is mounted on the PC board 19 for controlling the current to be supplied to the stator winding 16 .
  • FIG. 4 is a front view of the impeller 14 shown separately from the other elements in FIG. 3
  • FIG. 5 is a half section of the impeller 14 taken along the line 5 — 5 in FIG. 4
  • the blades 13 are arc-like.
  • the large number of blades 13 are attached to the body portion 15 radially to form the impeller 14 .
  • the configuration of the body portion 15 is, as shown in FIG. 5 , formed in an outwardly cup shape.
  • To the radially extended portion 15 a the inner peripheral portions of the blades 13 are fixed.
  • the blower structured as described above is used by mounting on an air vent in a box of an office automation apparatus.
  • the blower is attached such that the top in FIG. 3 is the outer side of the box of the office automation apparatus and the shaft 6 is horizontally oriented.
  • controlled current passes through the stator winding 16 to generate magnetic flux through the stator core 17 .
  • the magnetic interference between the magnetic flux and the magnetic flux generated by the magnet 12 rotates the rotating portion.
  • Due to the rotation of the impeller 14 the air sucked from the center of the impeller 14 flows radially by the centrifugal force.
  • the air is then collected in the casing 1 and is discharged from an outlet (not shown) provided in the casing 1 .
  • the required characteristics of a blower of this kind is represented as the relationship between the pressure P and the flowing rate Q, i.e., the P-Q characteristics.
  • the P-Q characteristics a blower of a given size
  • one with a high air flow pressure and with a large amount of air flow is determined to be one with satisfactory P-Q characteristics.
  • the improvement can be attained by increasing the number of rotations.
  • the present invention has been made in view of the above, and an object of the invention is to provide a blower suitable for use in severe circumstances.
  • a blower in which a shaft is rotatably supported in a tubular casing, a cup shaped motor yoke is fixed to the shaft, and a body portion of an impeller comprising a large number of blades on an outer peripheral portion is fixed to the motor yoke, characterized in that substantially ring-like openings are provided at a portion where the blades of the body portion are mounted and on a circumference around the shaft.
  • the openings substantially form a long opening in an arc along the direction of the arrangement of the large number of blades.
  • FIG. 1 is a front view of an impeller of a blower according to the present invention shown separately from other elements;
  • FIG. 2 is a partially sectional view of the impeller taken along line 2 — 2 in FIG. 1 ;
  • FIG. 3 is a partially sectional view of the blower according to the present invention.
  • FIG. 4 is a front view of a conventional impeller shown separately from other elements
  • FIG. 5 is a partially sectional view of the impeller taken along the line 5 — 5 in FIG. 4 ;
  • FIG. 6 is a table showing the characteristics of the blower according to the present invention.
  • FIG. 7 is a table showing the characteristics of the conventional blower.
  • FIG. 8 is a graph showing the characteristics of the blower according to the present invention and of the conventional blower.
  • FIG. 2 is a partially sectional view of the impeller taken along the line 2 — 2 in FIG. 1 .
  • substantially ring-like openings 15 b are provided at a portion where the blades 13 of the body portion 15 are mounted (in the radially extended portion 15 a) and on a circumference of a circle around the shaft 6 , the openings 15 b extending along the direction of the arrangement of the large number of blades 13 being extended along the axial direction of the shaft 6 .
  • the openings 15 b are long, and provided almost all around the circumference with only four connecting portions 15 c remaining.
  • FIGS. 6 and 7 are with respect to the blower according to the present invention and the conventional blower, respectively.
  • the tables show changes in the pressure and the speed with the flowing rate of air as the parameter.
  • the tables show that, with the blower according to the present invention, as the flow rate decreases, the pressure rises more steeply and the speed rises more gently compared with the case where the conventional blower is used.
  • FIG. 8 plots the data shown in FIGS. 6 and 7 .
  • type A denotes the conventional blower while type B denotes the blower according to the present invention. The data was collected from actually manufactured blowers.
  • the flow rate when, for example, the static pressure in 150 Pa is, 0.328 m 3 /min with regard to the conventional blower and 0.419 m 3 /min with regard to the blower according to the present invention, which clearly shows the improvement attained by the present invention.
  • a blower according to the first aspect of the present invention has a simple structure only with the openings provided at a portion where the blades of the body portion are attached, and thus,, the P-Q characteristics can be improved without making the blower larger. Further, a blower according to the second aspect of the present invention defining the position and the shape of the openings can enhance the above effect.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

A blower with the improved P-Q characteristics is provided. A blower comprising a shaft rotatably supported in a tubular casing, a cup shaped motor yoke 11 fixed to the shaft, and a body portion 15 of an impeller 14 comprising a large number of blades 13 on an outer peripheral portion is fixed to the motor yoke 11, wherein the blower is characterized in that substantially ring-like openings 15b are provided at a portion where the blades 13 of the body portion 15 are mounted and on a circumference around the shaft. Since air flow is facilitated by the openings 15b, the P-Q (pressure—flow rate) characteristics are improved.

Description

This is one of two ( 2 ) reissue applications directed to various aspects of a blower described in U.S. Pat. No. 6,368,081, which corresponds to U.S. patent application Ser. No. 09/603,973 filed Jun. 26, 2000. The first filed reissue application is the present application, application Ser. No. 10/807,229, filed Mar. 23, 2004. The second reissue application is application Ser. No. 11/131,769, filed May 18, 2005, which is a continuation of said application Ser. No. 10/807,229, filed Mar. 23, 2004 (and, as noted above, which is a reissue of U.S. Pat. No. 6,368,081, which corresponds to U.S. patent application Ser. No. 09/603,973 filed Jun. 26, 2000 ).
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an improvement of a blower for use in various kinds of office automation apparatus.
2. Description of the Related Art
In various kinds of office automation apparatus, since a large number of electronic circuits are housed in a box of the apparatuses, it is difficult to discharge heat generated by electronic components forming the electronic circuits, and thus, there is a fear that a part of the electronic components may be broken or deteriorated. In particular, in the context of the recent trend toward miniaturization of office automation apparatuses, since the apparatuses are miniaturized while the quantity of heat generated almost remains the same, how to deal with the heat is an important technical problem to be solved. In order to solve the problem, an air vent for attaching a blower therein is provided in a side wall of an apparatus to discharge the heat inside to the outside of the apparatus, thereby preventing damage due to the heat generated inside.
An example of a conventionally often used blower is described with reference to FIG. 3. Sign 1 shows a casing which is tubular. An integrally molded housing 2 is provided on the right in FIG. 3 inside the casing 1. A bearing linear 3 is inserted into the housing 2. Outer races of bearings 4 and 5 are supported by the inner side of the bearing liner 3, and a shaft 6 is inserted into the inner races of the bearings 4 and 5. A race 7 is attached to the lower end of the shaft 6 for preventing the shaft 6 from falling off and for axially positioning the shaft 6.
Knurl 8 is provided on the upper end of the shaft 6, and is fixed to a boss 9 formed by die casting zinc. Springs 10 are provided between the boss 9 and the inner race of the bearing 4 for providing thrust load on the bearing 4. A center portion of a cup-like motor yoke 11 is fixed to the boss 9. On the boss 9, the central portion of a cup shaped yoke 11 is fixed, and on the inner peripheral portion, a ring shaped magnet 12 is fixed. A body portion 15 of an impeller 14 provided with blades 13 is fixed to the outer peripheral portion of the motor yoke 11. The shaft 6, the motor yoke 11 and the impeller 14 form a rotating portion.
A stater core 17 around which a stator winding 16 is wound, is provided in the inner peripheral portion of the motor yoke 11 to form a fixed portion. A pin-like connection terminal 18 is provided in a projected manner from the stator core 17 downwardly to pierce a PC board 19 supported by the housing 2. An electronic circuit is mounted on the PC board 19 for controlling the current to be supplied to the stator winding 16.
FIG. 4 is a front view of the impeller 14 shown separately from the other elements in FIG. 3, and FIG. 5 is a half section of the impeller 14 taken along the line 5—5 in FIG. 4. As shown in FIG. 4, the blades 13 are arc-like. The large number of blades 13 are attached to the body portion 15 radially to form the impeller 14. The configuration of the body portion 15 is, as shown in FIG. 5, formed in an outwardly cup shape. To the radially extended portion 15a the inner peripheral portions of the blades 13 are fixed.
The blower structured as described above is used by mounting on an air vent in a box of an office automation apparatus. The blower is attached such that the top in FIG. 3 is the outer side of the box of the office automation apparatus and the shaft 6 is horizontally oriented. In that state, when power is supplied through the control circuit on the PC board 19, controlled current passes through the stator winding 16 to generate magnetic flux through the stator core 17. Then, the magnetic interference between the magnetic flux and the magnetic flux generated by the magnet 12 rotates the rotating portion. Due to the rotation of the impeller 14, the air sucked from the center of the impeller 14 flows radially by the centrifugal force. The air is then collected in the casing 1 and is discharged from an outlet (not shown) provided in the casing 1. By this blowing, the inside of the box is cooled.
The required characteristics of a blower of this kind is represented as the relationship between the pressure P and the flowing rate Q, i.e., the P-Q characteristics. Among blowers of a given size, one with a high air flow pressure and with a large amount of air flow is determined to be one with satisfactory P-Q characteristics. When circumstances do not allow the blower to be larger and still the P-Q characteristics have to be improved, the improvement can be attained by increasing the number of rotations. However, there is a problem that merely increasing the number of rotations not only increases the noise when the blower is in operation but also shortens the lifetime of the blower.
SUMMARY OF THE INVENTION
The present invention has been made in view of the above, and an object of the invention is to provide a blower suitable for use in severe circumstances.
In order to solve the above-mentioned problems, according to a first aspect of the present invention, there is provided a blower in which a shaft is rotatably supported in a tubular casing, a cup shaped motor yoke is fixed to the shaft, and a body portion of an impeller comprising a large number of blades on an outer peripheral portion is fixed to the motor yoke, characterized in that substantially ring-like openings are provided at a portion where the blades of the body portion are mounted and on a circumference around the shaft.
According to a second aspect of the present invention, in the blower as described in the first aspect of the present invention, it is characterized in that the openings substantially form a long opening in an arc along the direction of the arrangement of the large number of blades.
In a blower structured as mentioned in the above, when the impeller is rotating, air flows through the openings provided according to the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings:
FIG. 1 is a front view of an impeller of a blower according to the present invention shown separately from other elements;
FIG. 2 is a partially sectional view of the impeller taken along line 2—2 in FIG. 1;
FIG. 3 is a partially sectional view of the blower according to the present invention;
FIG. 4 is a front view of a conventional impeller shown separately from other elements;
FIG. 5 is a partially sectional view of the impeller taken along the line 5—5 in FIG. 4;
FIG. 6 is a table showing the characteristics of the blower according to the present invention;
FIG. 7 is a table showing the characteristics of the conventional blower; and
FIG. 8 is a graph showing the characteristics of the blower according to the present invention and of the conventional blower.
 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
An embodiment of the present invention is now described with reference to FIGS. 1 and 2. FIG. 2 is a partially sectional view of the impeller taken along the line 2—2 in FIG. 1. According to the present invention, substantially ring-like openings 15b are provided at a portion where the blades 13 of the body portion 15 are mounted (in the radially extended portion 15a) and on a circumference of a circle around the shaft 6, the openings 15b extending along the direction of the arrangement of the large number of blades 13 being extended along the axial direction of the shaft 6. As shown in FIG. 1, the openings 15b are long, and provided almost all around the circumference with only four connecting portions 15c remaining.
When the blower according to the present invention with the openings 15b provided at the portion where the blades 13 of the body portion 15 are mounted (in the radially extended portion 15a) is in operation, since the blades 13 suck air from the openings 15b provided adjacent thereto, better air flowing can be obtained compared with a case where a conventional blower with no such openings (see FIGS. 4 and 5).
Tables shown in FIGS. 6 and 7 are with respect to the blower according to the present invention and the conventional blower, respectively. The tables show changes in the pressure and the speed with the flowing rate of air as the parameter. The tables show that, with the blower according to the present invention, as the flow rate decreases, the pressure rises more steeply and the speed rises more gently compared with the case where the conventional blower is used. FIG. 8 plots the data shown in FIGS. 6 and 7. In FIG. 8, type A denotes the conventional blower while type B denotes the blower according to the present invention. The data was collected from actually manufactured blowers. It can be seen that, the flow rate when, for example, the static pressure in 150 Pa is, 0.328 m3/min with regard to the conventional blower and 0.419 m3/min with regard to the blower according to the present invention, which clearly shows the improvement attained by the present invention.
A blower according to the first aspect of the present invention has a simple structure only with the openings provided at a portion where the blades of the body portion are attached, and thus,, the P-Q characteristics can be improved without making the blower larger. Further, a blower according to the second aspect of the present invention defining the position and the shape of the openings can enhance the above effect.

Claims (22)

1. A blower comprising
a shaft which is supported rotatably in a tubular casing,
a cup shaped motor yoke fixed to said shaft, wherein the shaft extends from a closed end of the cup shaped motor yoke to an open end of the cup shaped motor yoke, and
a body portion of an impeller comprising a plurality of blades on an outer peripheral portion fixed to said motor yoke, wherein substantially ring-like openings are provided in the body portion at a mounting portion where said plurality of blades are mounted and on a circumference of a circle around said shaft, and wherein the mounting portion is located substantially adjacent, in a radially outward direction, the open end of the cup shaped motor yoke.
2. A blower according to claim 1, wherein said openings substantially form a long opening in an arc extending along the direction of the arrangement of said plurality of blades.
3. A blower according to claim 1, wherein the openings in the mounting portion are substantially annular.
4. A blower comprising
a casing comprising a first portion having a circular space that accommodates a body portion of the blower therein and a second portion that joins to the first portion and includes an air inlet opening therein, wherein the casing further includes an outlet for air discharge;
the body portion comprising an impeller and having a cup shaped hub with a closed end and an open end, a plurality of blades peripherally surrounding the cup shaped hub being supported on a blades-mounting portion of the body portion; and
a driving motor,
wherein the body portion is rotated by the driving motor,
wherein the blades-mounting portion lies substantially adjacent, outwardly in a radial direction, the open end of the cup shaped hub, and
wherein the blades-mounting portion includes openings therein.
5. A blower according to claim 4, further including a motor yoke fixed inside the cup shaped hub of the body portion.
6. A blower according to claim 4, wherein the first portion of the casing includes no air inlets therein such that the air inlet in the second portion of the casing is the only air inlet for the blower.
7. A blower according to claim 4, wherein the openings in the blades-mounting portion are substantially annular.
8. A blower according to claim 4, wherein the outlet for air discharge in the casing comprises an opening in a side of the casing radial to the plurality of blades.
9. A blower comprising
a casing comprising a first portion having a circular space that accommodates a body portion of the blower therein and a second portion that joins to the first portion and includes an air inlet opening therein, wherein the casing further includes an outlet for air discharge;
the body portion comprising an impeller and having a cup shaped hub with a closed end and an open end, a plurality of blades peripherally surrounding the cup shaped hub being supported on a blades-mounting portion of the body portion; and
a driving motor,
wherein the body portion is rotated by the driving motor,
wherein the blades-mounting portion is located at a side of the casing adjacent a bottom of the circular space of the first portion, and opposite the second portion, and
wherein the blades-mounting portion includes openings therein.
10. A blower according to claim 9, further including a motor yoke fixed inside the cup shaped hub of the body portion.
11. A blower according to claim 9, wherein the first portion of the casing includes no air inlets therein such that the air inlet in the second portion of the casing is the only air inlet for the blower.
12. A blower according to claim 9, wherein the openings in the blades-mounting portion are substantially annular.
13. A blower according to claim 9, wherein the outlet for air discharge in the casing comprises an opening in a side of the casing radial to the plurality of blades.
14. A blower comprising
a casing comprising a first portion having a circular space that accommodates a body portion of the blower therein and a second portion that joins to the first portion and includes an air inlet opening therein, wherein the casing further includes an outlet for air discharge;
the body portion comprising an impeller and having a cup shaped hub with a closed end and an open end, a plurality of blades peripherally surrounding the cup shaped hub being supported on a blades-mounting portion of the body portion; and
a driving motor,
wherein the body portion is rotated by the driving motor,
wherein the first portion of the casing further includes a base having a protruding cylindrical portion that accommodates a bearing tube,
wherein the blades-mounting portion is substantially adjacent, outwardly in a radial direction, the protruding cylindrical portion, and
wherein the blades-mounting portion includes openings therein.
15. A blower according to claim 14, further including a motor yoke fixed inside the cup shaped hub of the body portion.
16. A blower according to claim 14, wherein the first portion of the casing includes no air inlets therein such that the air inlet in the second portion of the casing is the only air inlet for the blower.
17. A blower according to claim 14, wherein the openings in the blades-mounting portion are substantially annular.
18. A blower according to claim 14, wherein the outlet for air discharge in the casing comprises an opening in a side of the casing radial to the plurality of blades.
19. A blower comprising
a casing comprising a first portion having a circular space that accommodates a body portion of the blower therein and a second portion that joins to the first portion and includes an air inlet opening therein, wherein the casing further includes an outlet for air discharge;
the body portion comprising an impeller and having a cup shaped hub with a closed end and an open end, a plurality of blades peripherally surrounding the cup shaped hub being supported on a blades-mounting portion of the body portion; and
a driving motor,
wherein the body portion is rotated by the driving motor,
wherein the blades-mounting portion includes openings therein, and
wherein the first portion of the casing includes no air inlets therein such that the air inlet in the second portion of the casing is the only air inlet for the blower.
20. A blower according to claim 19, wherein the outlet for air discharge in the casing comprises an opening in a side of the casing radial to the plurality of blades.
21. A blower comprising
a casing comprising a first portion having a circular space that accommodates a body portion of the blower therein and a second portion that joins to the first portion and includes an air inlet opening therein, wherein the casing further includes an outlet for air discharge;
the body portion comprising an impeller and having a cup shaped hub with a closed end and an open end, a plurality of blades peripherally surrounding the cup shaped hub being supported on a blades-mounting portion of the body portion, wherein the blades-mounting portion includes openings therein; and
a driving motor,
wherein the body portion is rotated by the driving motor, and
wherein the air inlet opening in the second portion of the casing and the closed end of the cup shaped hub together form a continuous annular air inlet passageway.
22. A blower according to claim 21, wherein the outlet for air discharge in the casing comprises an opening in a side of the casing radial to the plurality of blades.
US10/807,229 1999-11-19 2004-03-23 Blower Expired - Lifetime USRE39117E1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US10/807,229 USRE39117E1 (en) 1999-11-19 2004-03-23 Blower
US11/131,769 USRE39787E1 (en) 1999-11-19 2005-05-18 Blower

Applications Claiming Priority (3)

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JP32959899A JP2001140791A (en) 1999-11-19 1999-11-19 Blower
US09/603,973 US6368081B1 (en) 1999-11-19 2000-06-26 Blower
US10/807,229 USRE39117E1 (en) 1999-11-19 2004-03-23 Blower

Related Parent Applications (1)

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US09/603,973 Reissue US6368081B1 (en) 1999-11-19 2000-06-26 Blower

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Application Number Title Priority Date Filing Date
US09/603,973 Continuation US6368081B1 (en) 1999-11-19 2000-06-26 Blower

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US10/807,229 Expired - Lifetime USRE39117E1 (en) 1999-11-19 2004-03-23 Blower
US11/131,769 Expired - Lifetime USRE39787E1 (en) 1999-11-19 2005-05-18 Blower

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050249604A1 (en) * 2004-05-07 2005-11-10 Delta Electronics, Inc. Fan
US20090175730A1 (en) * 2004-05-07 2009-07-09 Delta Electronics Inc. Fan and impeller
US20100209270A1 (en) * 2009-02-17 2010-08-19 Sanyo Denki Co., Ltd. Centrifugal fan
US20110175493A1 (en) * 2010-01-20 2011-07-21 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd . Fan
US20120032542A1 (en) * 2010-08-05 2012-02-09 Rotechnic Company Limited Water-proof dust-proof and salty-mist-proof cooling fan
US20120325442A1 (en) * 2007-03-14 2012-12-27 Mitsubishi Electric Corporation Air conditioner

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6951241B1 (en) * 1999-06-21 2005-10-04 Fasco Industries, Inc. Method for cooling a motor in a blower assembly for a furnance
JP2001304199A (en) * 2000-04-19 2001-10-31 Minebea Co Ltd Blower
US6612814B2 (en) * 2002-01-29 2003-09-02 Ideal Elethermal Inc. Electrical fan having an oil retaining ring to prevent loss and evaporation of lubricant oil
US7209355B2 (en) * 2002-05-15 2007-04-24 Matsushita Electric Industrial Co., Ltd. Cooling device and an electronic apparatus including the same
US6839234B2 (en) * 2002-05-15 2005-01-04 Matsushita Electric Industrial Co., Ltd. Cooling device and an electronic apparatus including the same
JP4292417B2 (en) 2005-01-28 2009-07-08 日本電産サーボ株式会社 Centrifugal fan impeller
JP5005181B2 (en) * 2005-04-01 2012-08-22 日本電産サーボ株式会社 Centrifugal fan
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CN101509497B (en) * 2008-02-15 2010-11-17 建准电机工业股份有限公司 Radiator fan
CN101600321B (en) * 2008-06-04 2011-12-28 富准精密工业(深圳)有限公司 Radiator fan and electronic device adopting same
GB2467966B (en) * 2009-02-24 2013-04-03 Dyson Technology Ltd Rotor assembly
GB2467965B (en) 2009-02-24 2015-04-22 Dyson Technology Ltd Rotor assembly
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Citations (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US985152A (en) * 1909-10-20 1911-02-28 Walter H Fieroe Power-wheel.
US1513763A (en) * 1922-03-17 1924-11-04 American Blower Co Fan wheel and method of making same
US1700017A (en) * 1929-01-22 Ttjring co
US3262637A (en) * 1964-11-04 1966-07-26 Vernco Corp Individual blade mountings in a blower wheel
US4164690A (en) * 1976-04-27 1979-08-14 Rolf Muller Compact miniature fan
JPS62158198A (en) 1985-12-27 1987-07-14 Nec Corp Production of single crystal layer of silicon carbide
US4689507A (en) * 1986-03-27 1987-08-25 Emerson Electric Co. Ventilation structure for an electric motor
JPH11218096A (en) 1998-01-31 1999-08-10 Toto Ltd High pressure fan
US5947704A (en) * 1997-09-30 1999-09-07 Hsieh; Hsin-Mao Fan assembly
US6137197A (en) * 1999-01-12 2000-10-24 Minebea Co., Ltd. Axial flow fan motor with circuit board and housing interlocking structure
USRE37261E1 (en) * 1990-08-22 2001-07-03 Papst Licensing Gmbh & Co. Kg Axially compact small fan
US6278207B1 (en) * 1999-12-24 2001-08-21 Minebea Co., Ltd. Blower
US6290471B1 (en) * 2000-02-18 2001-09-18 Sunonwealth Electric Machine Industry Co., Ltd. Pivotal structure for an impeller of a miniature heat dissipating fan
US6309190B1 (en) * 2000-01-28 2001-10-30 Yen Sun Technic Industrial Corporation Shaft supporting structure for an axial fan
US6345956B1 (en) * 1998-07-14 2002-02-12 Delta Electronics, Inc. Impeller of a blower having air-guiding ribs with geometrical configurations
JP3277641B2 (en) 1993-10-12 2002-04-22 松下電器産業株式会社 Sirocco fan motor
US6379126B1 (en) * 1999-12-24 2002-04-30 Minebea Co., Ltd. Blower
US6394767B1 (en) * 2000-02-29 2002-05-28 Minebea Co., Ltd. Blower and a manufacturing method of the same
US6447272B2 (en) * 1999-12-24 2002-09-10 Minebea Co., Ltd. Blower
US6488483B1 (en) * 2001-06-14 2002-12-03 Hsieh Hsin-Mao Low power loss heat dissipation fan
US6511299B1 (en) * 2000-04-19 2003-01-28 Minebea Co., Ltd. Fan in which motor yoke is mounted by caulking or spot welding and the mounting method thereof
US6540476B2 (en) 2000-11-16 2003-04-01 Delta Electronics, Inc. Centrifugal fan
US20030143070A1 (en) * 2002-01-31 2003-07-31 Wen-Shi Huang Blower and the blade structure thereof
US6612814B2 (en) * 2002-01-29 2003-09-02 Ideal Elethermal Inc. Electrical fan having an oil retaining ring to prevent loss and evaporation of lubricant oil
US6616422B2 (en) * 2001-10-09 2003-09-09 Adda Corporation Cooling fan dust structure for keeping off flying dust from entering into spindle
US6652246B1 (en) 2000-04-24 2003-11-25 Delta Electronics, Inc. Centrifugal fan having upside-down mounted structure
US6655929B2 (en) * 2001-10-09 2003-12-02 Adda Corporation Cooling fan dust guard
US6700257B2 (en) 2001-08-31 2004-03-02 Asia Vital Components Co., Ltd. Bearing fixed assembly in a direct current fan
US6712582B1 (en) 2000-10-10 2004-03-30 Delta Electronics, Inc. Centrifugal fan
US6726450B2 (en) * 2002-03-08 2004-04-27 Hon Hai Precision Ind. Co., Ltd. Fan having sealing device
US6773239B2 (en) 2001-03-27 2004-08-10 Delta Electronics, Inc. Fan with improved self-cooling capability
US20050047916A1 (en) * 2003-08-29 2005-03-03 Datech Technology Co., Ltd. Modified centrifugal fan wheel
US20050047088A1 (en) * 2003-08-27 2005-03-03 Xu Li Fu Heat dissipating device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53126510A (en) 1977-04-12 1978-11-04 Daido Steel Co Ltd Runner of sirocco type fan
JPH0329287U (en) 1989-07-28 1991-03-22
TW581381U (en) 2001-06-13 2004-03-21 Delta Electronics Inc High-efficiency side-blowing type heat dissipating device

Patent Citations (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1700017A (en) * 1929-01-22 Ttjring co
US985152A (en) * 1909-10-20 1911-02-28 Walter H Fieroe Power-wheel.
US1513763A (en) * 1922-03-17 1924-11-04 American Blower Co Fan wheel and method of making same
US3262637A (en) * 1964-11-04 1966-07-26 Vernco Corp Individual blade mountings in a blower wheel
US4164690A (en) * 1976-04-27 1979-08-14 Rolf Muller Compact miniature fan
JPS62158198A (en) 1985-12-27 1987-07-14 Nec Corp Production of single crystal layer of silicon carbide
US4689507A (en) * 1986-03-27 1987-08-25 Emerson Electric Co. Ventilation structure for an electric motor
USRE37261E1 (en) * 1990-08-22 2001-07-03 Papst Licensing Gmbh & Co. Kg Axially compact small fan
JP3277641B2 (en) 1993-10-12 2002-04-22 松下電器産業株式会社 Sirocco fan motor
US5947704A (en) * 1997-09-30 1999-09-07 Hsieh; Hsin-Mao Fan assembly
JPH11218096A (en) 1998-01-31 1999-08-10 Toto Ltd High pressure fan
US6345956B1 (en) * 1998-07-14 2002-02-12 Delta Electronics, Inc. Impeller of a blower having air-guiding ribs with geometrical configurations
US6137197A (en) * 1999-01-12 2000-10-24 Minebea Co., Ltd. Axial flow fan motor with circuit board and housing interlocking structure
US6379126B1 (en) * 1999-12-24 2002-04-30 Minebea Co., Ltd. Blower
US6278207B1 (en) * 1999-12-24 2001-08-21 Minebea Co., Ltd. Blower
US6447272B2 (en) * 1999-12-24 2002-09-10 Minebea Co., Ltd. Blower
US6309190B1 (en) * 2000-01-28 2001-10-30 Yen Sun Technic Industrial Corporation Shaft supporting structure for an axial fan
US6290471B1 (en) * 2000-02-18 2001-09-18 Sunonwealth Electric Machine Industry Co., Ltd. Pivotal structure for an impeller of a miniature heat dissipating fan
US6394767B1 (en) * 2000-02-29 2002-05-28 Minebea Co., Ltd. Blower and a manufacturing method of the same
US6511299B1 (en) * 2000-04-19 2003-01-28 Minebea Co., Ltd. Fan in which motor yoke is mounted by caulking or spot welding and the mounting method thereof
US6786706B2 (en) * 2000-04-19 2004-09-07 Minebea Co., Ltd. Fan in which motor yoke is mounted on a motor shaft by caulking or spot welding
US6652246B1 (en) 2000-04-24 2003-11-25 Delta Electronics, Inc. Centrifugal fan having upside-down mounted structure
US6712582B1 (en) 2000-10-10 2004-03-30 Delta Electronics, Inc. Centrifugal fan
US6540476B2 (en) 2000-11-16 2003-04-01 Delta Electronics, Inc. Centrifugal fan
US6773239B2 (en) 2001-03-27 2004-08-10 Delta Electronics, Inc. Fan with improved self-cooling capability
US6488483B1 (en) * 2001-06-14 2002-12-03 Hsieh Hsin-Mao Low power loss heat dissipation fan
US6700257B2 (en) 2001-08-31 2004-03-02 Asia Vital Components Co., Ltd. Bearing fixed assembly in a direct current fan
US6616422B2 (en) * 2001-10-09 2003-09-09 Adda Corporation Cooling fan dust structure for keeping off flying dust from entering into spindle
US6655929B2 (en) * 2001-10-09 2003-12-02 Adda Corporation Cooling fan dust guard
US6612814B2 (en) * 2002-01-29 2003-09-02 Ideal Elethermal Inc. Electrical fan having an oil retaining ring to prevent loss and evaporation of lubricant oil
US20030143070A1 (en) * 2002-01-31 2003-07-31 Wen-Shi Huang Blower and the blade structure thereof
US6726450B2 (en) * 2002-03-08 2004-04-27 Hon Hai Precision Ind. Co., Ltd. Fan having sealing device
US20050047088A1 (en) * 2003-08-27 2005-03-03 Xu Li Fu Heat dissipating device
US20050047916A1 (en) * 2003-08-29 2005-03-03 Datech Technology Co., Ltd. Modified centrifugal fan wheel

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Dec. 17, 2002 Japanese Patent Office Action from Japan Patent Application No. 11-329598 (with English-language translation).
Sep. 17, 2002 Japanese Patent Office Action from Japan Patent Application No. 11-329598 (with English-language translation).

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050249604A1 (en) * 2004-05-07 2005-11-10 Delta Electronics, Inc. Fan
US20090175730A1 (en) * 2004-05-07 2009-07-09 Delta Electronics Inc. Fan and impeller
US8202055B2 (en) 2004-05-07 2012-06-19 Delta Electronics, Inc. Fan and impeller
US20120325442A1 (en) * 2007-03-14 2012-12-27 Mitsubishi Electric Corporation Air conditioner
US8499580B2 (en) * 2007-03-14 2013-08-06 Mitsubishi Electric Corporation Air conditioner
US20100209270A1 (en) * 2009-02-17 2010-08-19 Sanyo Denki Co., Ltd. Centrifugal fan
US8764418B2 (en) * 2009-02-17 2014-07-01 Sanyo Denki Co., Ltd. Centrifugal fan
US20110175493A1 (en) * 2010-01-20 2011-07-21 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd . Fan
US8246329B2 (en) * 2010-01-20 2012-08-21 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Fan
US20120032542A1 (en) * 2010-08-05 2012-02-09 Rotechnic Company Limited Water-proof dust-proof and salty-mist-proof cooling fan

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