US20040146397A1 - Combination fan-flywheel-pulley assembly and method of forming - Google Patents
Combination fan-flywheel-pulley assembly and method of forming Download PDFInfo
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- US20040146397A1 US20040146397A1 US10/754,091 US75409104A US2004146397A1 US 20040146397 A1 US20040146397 A1 US 20040146397A1 US 75409104 A US75409104 A US 75409104A US 2004146397 A1 US2004146397 A1 US 2004146397A1
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- Prior art keywords
- flywheel
- fan
- assembly
- pulley
- baffle
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/30—Flywheels
- F16F15/315—Flywheels characterised by their supporting arrangement, e.g. mountings, cages, securing inertia member to shaft
- F16F15/3153—Securing inertia members to the shafts
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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
- 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
- F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/02—Additional mass for increasing inertia, e.g. flywheels
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/1004—Structural association with clutches, brakes, gears, pulleys or mechanical starters with pulleys
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/32—Friction members
- F16H55/36—Pulleys
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2121—Flywheel, motion smoothing-type
Definitions
- This invention relates generally to a flywheel assembly. More particularly, this invention relates to a combination fan-flywheel-pulley assembly with an integral baffle, used in conjunction with an electric motor.
- Flywheel assemblies are typically coupled to an armature shaft of a motor to maintain rotational speed of the motor by virtue of the inertia of the flywheel.
- fans have been mounted to a motor to cool the motor.
- Pulley systems are also used to transfer power from the shaft of the motor to other components.
- Combination fan-flywheel-pulley assemblies typically include several components joined together, using a process such as staking, to create the fan, flywheel, and pulley assembly. Once such assembly is disclosed in U.S. Pat. No. 5,735,669 to Niemela.
- Known fan-flywheel-pulley assemblies may have several shortcomings.
- the combination assemblies can be difficult to manufacture.
- the need for increased inertia from the flywheel requires an increase in the diameter of the flywheel, thereby increasing the size of any housing covering the assembly.
- the performance of the fan can vary depending on the type of blade used to create the fan and depending on how efficiently the fan can circulate air through the motor.
- This invention relates generally to a flywheel assembly. More particularly, this invention relates to a combination fan-flywheel-pulley assembly with an integral baffle, used in conjunction with an electric motor.
- a fan-flywheel-pulley assembly for use in conjunction with an electric motor, the assembly generally comprising a pulley positioned about a central axis; a flywheel coupled to the pulley and positioned about the central axis, the flywheel including a baffle extending circumferentially over and in close proximity to a cylindrical wall unit of the motor, the baffle surrounding the motor to reduce air leakage between the baffle and the cylindrical wall unit; and a fan coupled to the flywheel including a plurality of radial blades and positioned about the central axis.
- a fan-flywheel-pulley assembly for use in conjunction with an electric motor may generally comprise a pulley positioned about a central axis; a flywheel coupled to the pulley and positioned about the central axis, the flywheel including an outer circumferential flywheel surface at least partially defining a plurality of circumferentially spaced openings, and wherein a portion of the flywheel extends circumferentially about a cylindrical wall unit of the motor from an inner diameter to an outer diameter, wherein the portion creates a baffle positioned in close proximity to the cylindrical wall unit to limit a gap between the baffle and the cylindrical wall unit; and a radial fan disposed within the flywheel and positioned about the central axis including a plurality of blades, wherein each of the plurality of blades extends at least from the inner diameter to the outer diameter of the flywheel so that one of the plurality of openings are positioned between each adjacent blade of the plurality of blades.
- the pulley positioned about a central axis
- an electric motor comprising a shaft rotatably mounted about a central axis and a housing enclosing the motor and including a cylindrical wall unit having a front plate connected to a front end of the cylindrical wall unit and a back plate connected to a back end of the cylindrical wall unit.
- an integral fan-flywheel-pulley assembly coupled to the shaft including a pulley including a circumferential pulley surface extending along the central axis; a flywheel coupled to the pulley and positioned about the central axis and extending circumferentially from an inner diameter to an outer diameter, the flywheel including an outer circumferential flywheel surface at least partially defining a plurality of circumferentially spaced openings and further including a baffle extending over and in close proximity to the cylindrical wall unit of the motor to reduce leakage of air between the baffle and the cylindrical wall unit and thereby improve air flow through the motor; and a radial fan disposed within the flywheel and positioned about the central axis including a plurality of blades, wherein each of the plurality of blades are curved and extend at least from the inner diameter to the outer diameter of the flywheel so that one of each of the plurality of circumferentially spaced openings are positioned between each adjacent blade of the plurality of blades, and wherein the radial
- FIG. 1 is a front plan view of an exemplary combination fan-flywheel-pulley assembly in accordance with the present invention.
- FIG. 2 is a front perspective view of the assembly of FIG. 1.
- FIG. 3 is a back plan view of the assembly of FIG. 1.
- FIG. 4 is a back perspective view of the assembly of FIG. 1.
- FIG. 5 is a side plan view of the assembly of FIG. 1.
- FIG. 6 is a cutaway front perspective view of the assembly of FIG. 1 showing the fan blades.
- FIG. 7 is a side plan view of the assembly of FIG. 1 shown coupled to a motor in accordance with an example embodiment of the invention.
- FIG. 8 is a cross-sectional view taken along line 7 - 7 of FIG. 7 showing the assembly and the motor.
- FIG. 9 is a front perspective of a second embodiment of an exemplary fan assembly in accordance with the present invention.
- FIG. 10 is a back perspective of the fan assembly shown in FIG. 9.
- This invention relates generally to a flywheel assembly. More particularly, this invention relates to a combination fan-flywheel-pulley assembly with an integral baffle, used in conjunction with an electric motor. While the present invention is not so limited, an appreciation of the various aspects of the invention will be gained through a discussion of the examples provided below.
- An example fan-flywheel-pulley assembly made in accordance with this invention generally includes a pulley positioned about a central axis, a flywheel assembly coupled to the pulley and positioned about the central axis, and a fan including a plurality of radial blades generally disposed within the flywheel.
- the flywheel assembly includes a baffle extending circumferentially over and in close proximity to a cylindrical wall unit of an electric motor.
- the fan-flywheel-pulley assembly 100 generally comprises a fan 203 , a flywheel 101 , and a pulley 102 .
- the fan 203 , flywheel 101 , and pulley 102 may be integrally coupled to form the assembly 100 , as described in detail below.
- the pulley 102 of the assembly 100 includes an outer pulley diameter 120 with an outer pulley surface 121 and an inner pulley diameter 130 with an inner pulley surface 131 .
- the outer pulley surface 121 is grooved, with an inner groove diameter 125 .
- the grooves on the outer surface 121 provide a surface with increased frictional grip to allow a belt, such as, for example, a standard or poly-v belt or a cog-belt, or other device to attach to the outer surface 121 .
- the outer pulley surface 121 may not need to be grooved.
- the inner pulley diameter 130 defines an aperture 140 .
- the inner pulley surface 131 is threaded, with a thread diameter 135 .
- the threads on the inner pulley surface 131 allow the pulley 102 to be threaded onto an armature shaft of a motor (not shown) extending through the aperture 140 .
- the inner pulley surface 131 may also be, for example, keyed, tapered, or configured to be press-fit onto a shaft of a motor.
- the flywheel 101 shown best in FIGS. 2 and 4, is coupled to the pulley 102 and includes an outer flywheel diameter 110 and an inner flywheel diameter 310 .
- the flywheel 101 generally defines an outer flywheel surface 210 .
- the flywheel 101 includes a baffle portion 420 with an inner baffle diameter 320 , an outer baffle surface 220 , and an inner baffle surface 410 .
- the outer flywheel surface 210 partially defines, along with a portion of the fan 203 described below, a plurality of openings 230 circumferentially spaced along the outer flywheel surface 210 .
- a surface 115 of the flywheel 101 may preferably be, although need not be, solid and continuous.
- the fan 203 shown best in FIGS. 3 and 4, is illustrated in the example assembly 100 as being generally disposed within the flywheel 101 and includes a plurality of blades 235 . Outermost blade tips 236 of adjacent blades 235 are positioned on the outer flywheel diameter 210 to partially define each opening 230 along the outer flywheel diameter 210 . An innermost tip 337 of each blade 235 may preferably, but need not, extend towards the aperture 140 past the inner baffle diameter 320 . The blades 235 are also preferably curved, but may also be straight.
- the fan 203 is preferably a radial, or centrifugal fan, as opposed to an axial fan. A radial fan is preferable because the radial fan is best adapted to handle the high-pressure aerodynamic load of a motor.
- FIG. 6 a cutaway front perspective view of the assembly 100 is provided with a portion of the flywheel 101 removed to better show the components of the fan 203 .
- the outermost blade tip 236 of each blade 235 extends to the outer flywheel surface 210 , thereby defining, along with a portion of the outer flywheel surface 210 , each adjacent opening 230 .
- the assembly 100 is shown coupled to an example motor 700 in accordance with the present invention.
- the motor 700 includes a cylindrical wall unit or housing 710 as well as a front 715 and a rear 720 .
- a front plate 716 may be connected to the front 715 of the motor 700
- a back plate 719 may be connected to the rear 720 of the motor 700 .
- the assembly 100 is coupled to the motor 700 adjacent the front 715 of the motor 700 .
- the assembly 100 may alternatively be coupled to the motor 700 adjacent the rear 720 .
- the threaded inner pulley surface 131 of the assembly 100 is threaded onto an armature shaft 820 of the motor 700 .
- the assembly 100 rotates as the armature shaft 820 of the motor 700 rotates.
- the flywheel 101 of the assembly 100 through its inertia, stabilizes and maintains the rotational speed of the shaft 820 .
- the pulley 102 of the assembly 100 can be connected to a belt or other component to transfer the rotational energy generated by the motor 700 to another component in the system.
- the fan 203 of the assembly 100 draws air from the rear 720 of the motor 700 through the housing 710 . The air then exits through the openings 230 .
- the air forced through the housing 710 functions to cool the internal components of the motor 700 .
- the flywheel 101 of the assembly 100 extends over the housing 710 of the motor 700 .
- the inner baffle diameter 320 is selected so that the inner baffle surface 410 extends in close proximity to the housing 710 .
- the gap 810 between the inner baffle surface 410 and the housing 710 is generally small and is preferably equal to or less than 1 ⁇ 4 inch, although other sizes are also possible.
- the inner baffle surface 410 is in close proximity to the housing 710 to reduce any leakage of air through gap 810 . As the leakage is reduced, air is more efficiently forced from the rear 720 , through the housing 710 , along the blades 235 , and out the openings 230 in the assembly 100 , thereby cooling the motor 700 more efficiently.
- the baffle portion 420 of the flywheel 101 extending over the motor 700 also provides additional inertia.
- additional inertia To create a flywheel that generates additional inertia, it is necessary to add more mass to the flywheel. This can be accomplished by “building out” a flywheel by increasing the outer flywheel diameter 110 , or, as disclosed in this invention, extending the flywheel so that it extends further over the motor. In some applications, it is preferable to minimize the profile, or outer diameter, of the flywheel.
- inertia can be increased, in accordance with the present invention, by increasing the inner and outer baffle surfaces 220 and 410 to extend the assembly 100 further towards the rear 720 of the motor 700 . In this manner, the assembly 100 is designed with a greater mass and therefore greater inertia, while still minimizing the profile, or outer diameter 110 , of the assembly 100 .
- the assembly 100 made in accordance with the present invention provides additional inertia via the baffle portion 420 , while still maintaining a low profile to fit into a lower profile treadmill housing.
- the exemplary assembly 100 may be made using a variety of methods, such as, for example, die casting, sand casting, plaster molding, metal injection molding, etc.
- the assembly 100 is preferably formed as a single, integral unit, although the assembly 100 can be formed of various pieces joined together to create an integral unit.
- integralally formed means formed as a single unit out of a unitary piece of material, such as by molding.
- An example method of making the assembly 100 may generally include: (1) providing a mold made of known materials such as sand or plaster; (2) introducing a molten material into the mold; (3) allowing the molten material to harden a predetermined amount of time to form the molded unit; (4) stripping the molded unit from the mold; and (5) performing various finishing processes such as cleaning, trimming, machining, and/or balancing the molded unit.
- Other methods of forming the assembly 100 can also be used without departing from the scope of the invention.
- the exemplary assembly 100 may be made of a variety of materials. Generally, the assembly 100 may be made of any castable metal, such as, for example, iron, aluminum, zinc, magnesium, etc. Other materials may also be used depending on the desired use for the assembly 100 .
- FIGS. 9 and 10 A second embodiment of an exemplary assembly 900 made in accordance with the present invention is shown in FIGS. 9 and 10.
- the assembly 900 is similar to the assembly 100 .
- the assembly 900 is designed to function more as a light, highly-efficient fan.
- the assembly 900 includes a hub 910 .
- the hub 910 may or may not function as the pulley system described in reference to the assembly 100 . Alternatively, the hub 910 may be removed from the assembly 900 if not needed.
- a plurality of blades 940 form a fan 925 disposed within the assembly 900 .
- a blade tip 945 of each of the plurality of blades 940 extends to an outer diameter 905 of the assembly 900 , and adjacent tips 945 define a plurality of openings 930 circumferentially spaced along the assembly 900 outer diameter 905 .
- the assembly 900 includes a baffle portion 920 .
- the baffle portion 920 is constructed to extend in close proximity to a housing of a motor (not shown) onto which the assembly 900 is mounted.
- the baffle portion 920 may reduce leakage of air between the baffle portion 920 and the housing of the motor, thereby increasing the efficiency of the fan.
- the assembly 900 may therefore be advantageous in applications that require little or no additional inertia but would benefit from the high efficiency of the fan 925 .
- the assembly 900 may be made using a variety of processes, for example, injection or compression molding. If injection molding is used, the steps for forming the assembly 900 may generally include: (1) providing a mold with a cavity; (2) injecting the cavity with a polymer under pressure; (3) allowing the polymer to solidify; (4) unclamping the mold; (5) removing the molded unit; and (6) performing various finishing processes such as trimming flash. Other processes may also be used.
- the assembly 900 may be made using a variety of materials.
- the assembly 900 is made of a light material, such as a polymer, although other materials, such as lighter castable metals (e.g., aluminum), may also be used.
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Abstract
A fan-flywheel-pulley assembly for use in conjunction with an electric motor. The assembly may include a pulley positioned about a central axis. The assembly may also include a flywheel coupled to the pulley and positioned about the central axis, the flywheel including an outer circumferential flywheel surface partially forming a plurality of circumferentially spaced openings. The flywheel may also include a baffle that extends circumferentially in close proximity to a cylindrical wall unit of the motor from an inner diameter to an outer diameter to limit a gap between the baffle and the cylindrical wall unit. Further, the assembly may also include a radial fan disposed within the flywheel including a plurality of blades extending at least from the flywheel inner diameter to the outer diameter each opening is positioned between each adjacent fan blade. The pulley, the flywheel, and the radial fan may be integrally formed.
Description
- This invention relates generally to a flywheel assembly. More particularly, this invention relates to a combination fan-flywheel-pulley assembly with an integral baffle, used in conjunction with an electric motor.
- Flywheel assemblies are typically coupled to an armature shaft of a motor to maintain rotational speed of the motor by virtue of the inertia of the flywheel. In addition, fans have been mounted to a motor to cool the motor. Pulley systems are also used to transfer power from the shaft of the motor to other components. Combination fan-flywheel-pulley assemblies typically include several components joined together, using a process such as staking, to create the fan, flywheel, and pulley assembly. Once such assembly is disclosed in U.S. Pat. No. 5,735,669 to Niemela.
- Known fan-flywheel-pulley assemblies may have several shortcomings. The combination assemblies can be difficult to manufacture. In addition, the need for increased inertia from the flywheel requires an increase in the diameter of the flywheel, thereby increasing the size of any housing covering the assembly. Also, the performance of the fan can vary depending on the type of blade used to create the fan and depending on how efficiently the fan can circulate air through the motor.
- Accordingly, there is a need for a combination fan-flywheel-pulley assembly that is simple to manufacture, maintains a low profile, and is efficient in cooling the motor.
- This invention relates generally to a flywheel assembly. More particularly, this invention relates to a combination fan-flywheel-pulley assembly with an integral baffle, used in conjunction with an electric motor.
- According to a first aspect of the invention, a fan-flywheel-pulley assembly for use in conjunction with an electric motor is provided, the assembly generally comprising a pulley positioned about a central axis; a flywheel coupled to the pulley and positioned about the central axis, the flywheel including a baffle extending circumferentially over and in close proximity to a cylindrical wall unit of the motor, the baffle surrounding the motor to reduce air leakage between the baffle and the cylindrical wall unit; and a fan coupled to the flywheel including a plurality of radial blades and positioned about the central axis.
- According to another aspect of the invention, a fan-flywheel-pulley assembly for use in conjunction with an electric motor may generally comprise a pulley positioned about a central axis; a flywheel coupled to the pulley and positioned about the central axis, the flywheel including an outer circumferential flywheel surface at least partially defining a plurality of circumferentially spaced openings, and wherein a portion of the flywheel extends circumferentially about a cylindrical wall unit of the motor from an inner diameter to an outer diameter, wherein the portion creates a baffle positioned in close proximity to the cylindrical wall unit to limit a gap between the baffle and the cylindrical wall unit; and a radial fan disposed within the flywheel and positioned about the central axis including a plurality of blades, wherein each of the plurality of blades extends at least from the inner diameter to the outer diameter of the flywheel so that one of the plurality of openings are positioned between each adjacent blade of the plurality of blades. The pulley, the flywheel, and the radial fan may be integrally formed.
- According to yet another aspect of the invention, an electric motor is provided comprising a shaft rotatably mounted about a central axis and a housing enclosing the motor and including a cylindrical wall unit having a front plate connected to a front end of the cylindrical wall unit and a back plate connected to a back end of the cylindrical wall unit. Also included is an integral fan-flywheel-pulley assembly coupled to the shaft including a pulley including a circumferential pulley surface extending along the central axis; a flywheel coupled to the pulley and positioned about the central axis and extending circumferentially from an inner diameter to an outer diameter, the flywheel including an outer circumferential flywheel surface at least partially defining a plurality of circumferentially spaced openings and further including a baffle extending over and in close proximity to the cylindrical wall unit of the motor to reduce leakage of air between the baffle and the cylindrical wall unit and thereby improve air flow through the motor; and a radial fan disposed within the flywheel and positioned about the central axis including a plurality of blades, wherein each of the plurality of blades are curved and extend at least from the inner diameter to the outer diameter of the flywheel so that one of each of the plurality of circumferentially spaced openings are positioned between each adjacent blade of the plurality of blades, and wherein the radial fan draws air through the motor. The pulley, the flywheel, and the radial fan may be integrally formed.
- FIG. 1 is a front plan view of an exemplary combination fan-flywheel-pulley assembly in accordance with the present invention.
- FIG. 2 is a front perspective view of the assembly of FIG. 1.
- FIG. 3 is a back plan view of the assembly of FIG. 1.
- FIG. 4 is a back perspective view of the assembly of FIG. 1.
- FIG. 5 is a side plan view of the assembly of FIG. 1.
- FIG. 6 is a cutaway front perspective view of the assembly of FIG. 1 showing the fan blades.
- FIG. 7 is a side plan view of the assembly of FIG. 1 shown coupled to a motor in accordance with an example embodiment of the invention.
- FIG. 8 is a cross-sectional view taken along line7-7 of FIG. 7 showing the assembly and the motor.
- FIG. 9 is a front perspective of a second embodiment of an exemplary fan assembly in accordance with the present invention.
- FIG. 10 is a back perspective of the fan assembly shown in FIG. 9.
- This invention relates generally to a flywheel assembly. More particularly, this invention relates to a combination fan-flywheel-pulley assembly with an integral baffle, used in conjunction with an electric motor. While the present invention is not so limited, an appreciation of the various aspects of the invention will be gained through a discussion of the examples provided below.
- An example fan-flywheel-pulley assembly made in accordance with this invention generally includes a pulley positioned about a central axis, a flywheel assembly coupled to the pulley and positioned about the central axis, and a fan including a plurality of radial blades generally disposed within the flywheel. The flywheel assembly includes a baffle extending circumferentially over and in close proximity to a cylindrical wall unit of an electric motor.
- Referring now to FIGS.1-5, an exemplary fan-flywheel-
pulley assembly 100 is shown in accordance with the present invention. The fan-flywheel-pulley assembly 100 generally comprises afan 203, aflywheel 101, and apulley 102. Thefan 203,flywheel 101, andpulley 102 may be integrally coupled to form theassembly 100, as described in detail below. - The
pulley 102 of theassembly 100, shown best in FIG. 2, includes anouter pulley diameter 120 with anouter pulley surface 121 and aninner pulley diameter 130 with aninner pulley surface 131. Theouter pulley surface 121 is grooved, with aninner groove diameter 125. The grooves on theouter surface 121 provide a surface with increased frictional grip to allow a belt, such as, for example, a standard or poly-v belt or a cog-belt, or other device to attach to theouter surface 121. Alternatively, theouter pulley surface 121 may not need to be grooved. Theinner pulley diameter 130 defines anaperture 140. Theinner pulley surface 131 is threaded, with athread diameter 135. The threads on theinner pulley surface 131 allow thepulley 102 to be threaded onto an armature shaft of a motor (not shown) extending through theaperture 140. Alternatively, theinner pulley surface 131 may also be, for example, keyed, tapered, or configured to be press-fit onto a shaft of a motor. - The
flywheel 101, shown best in FIGS. 2 and 4, is coupled to thepulley 102 and includes anouter flywheel diameter 110 and aninner flywheel diameter 310. Theflywheel 101 generally defines anouter flywheel surface 210. In addition, theflywheel 101 includes abaffle portion 420 with aninner baffle diameter 320, anouter baffle surface 220, and aninner baffle surface 410. Theouter flywheel surface 210 partially defines, along with a portion of thefan 203 described below, a plurality ofopenings 230 circumferentially spaced along theouter flywheel surface 210. Asurface 115 of theflywheel 101 may preferably be, although need not be, solid and continuous. - The
fan 203, shown best in FIGS. 3 and 4, is illustrated in theexample assembly 100 as being generally disposed within theflywheel 101 and includes a plurality ofblades 235.Outermost blade tips 236 ofadjacent blades 235 are positioned on theouter flywheel diameter 210 to partially define eachopening 230 along theouter flywheel diameter 210. Aninnermost tip 337 of eachblade 235 may preferably, but need not, extend towards theaperture 140 past theinner baffle diameter 320. Theblades 235 are also preferably curved, but may also be straight. Thefan 203 is preferably a radial, or centrifugal fan, as opposed to an axial fan. A radial fan is preferable because the radial fan is best adapted to handle the high-pressure aerodynamic load of a motor. - Referring now to FIG. 6, a cutaway front perspective view of the
assembly 100 is provided with a portion of theflywheel 101 removed to better show the components of thefan 203. As shown, theoutermost blade tip 236 of eachblade 235 extends to theouter flywheel surface 210, thereby defining, along with a portion of theouter flywheel surface 210, eachadjacent opening 230. - In FIGS. 7 and 8, the
assembly 100 is shown coupled to anexample motor 700 in accordance with the present invention. Themotor 700 includes a cylindrical wall unit orhousing 710 as well as a front 715 and a rear 720. Afront plate 716 may be connected to thefront 715 of themotor 700, and aback plate 719 may be connected to the rear 720 of themotor 700. As illustrated, theassembly 100 is coupled to themotor 700 adjacent thefront 715 of themotor 700. However, theassembly 100 may alternatively be coupled to themotor 700 adjacent the rear 720. - Referring now to the cross-sectional view in FIG. 8 taken along line7-7 of FIG. 7, the threaded
inner pulley surface 131 of theassembly 100 is threaded onto anarmature shaft 820 of themotor 700. In this configuration, theassembly 100 rotates as thearmature shaft 820 of themotor 700 rotates. Theflywheel 101 of theassembly 100, through its inertia, stabilizes and maintains the rotational speed of theshaft 820. Thepulley 102 of theassembly 100 can be connected to a belt or other component to transfer the rotational energy generated by themotor 700 to another component in the system. Thefan 203 of theassembly 100 draws air from the rear 720 of themotor 700 through thehousing 710. The air then exits through theopenings 230. The air forced through thehousing 710 functions to cool the internal components of themotor 700. - As shown in FIG. 8, the
flywheel 101 of theassembly 100, specifically thebaffle portion 420, extends over thehousing 710 of themotor 700. Theinner baffle diameter 320 is selected so that theinner baffle surface 410 extends in close proximity to thehousing 710. Thegap 810 between theinner baffle surface 410 and thehousing 710 is generally small and is preferably equal to or less than ¼ inch, although other sizes are also possible. In this configuration, theinner baffle surface 410 is in close proximity to thehousing 710 to reduce any leakage of air throughgap 810. As the leakage is reduced, air is more efficiently forced from the rear 720, through thehousing 710, along theblades 235, and out theopenings 230 in theassembly 100, thereby cooling themotor 700 more efficiently. - The
baffle portion 420 of theflywheel 101 extending over themotor 700 also provides additional inertia. To create a flywheel that generates additional inertia, it is necessary to add more mass to the flywheel. This can be accomplished by “building out” a flywheel by increasing theouter flywheel diameter 110, or, as disclosed in this invention, extending the flywheel so that it extends further over the motor. In some applications, it is preferable to minimize the profile, or outer diameter, of the flywheel. In these cases, inertia can be increased, in accordance with the present invention, by increasing the inner and outer baffle surfaces 220 and 410 to extend theassembly 100 further towards the rear 720 of themotor 700. In this manner, theassembly 100 is designed with a greater mass and therefore greater inertia, while still minimizing the profile, orouter diameter 110, of theassembly 100. - For example, for an application such as a treadmill, it is necessary to provide an assembly that has sufficient inertia to maintain a constant rotational speed but still maintain a low profile to fit into an aesthetically-pleasing treadmill housing. Therefore, the
assembly 100 made in accordance with the present invention provides additional inertia via thebaffle portion 420, while still maintaining a low profile to fit into a lower profile treadmill housing. - The
exemplary assembly 100 may be made using a variety of methods, such as, for example, die casting, sand casting, plaster molding, metal injection molding, etc. Theassembly 100 is preferably formed as a single, integral unit, although theassembly 100 can be formed of various pieces joined together to create an integral unit. As used herein, “integrally formed” means formed as a single unit out of a unitary piece of material, such as by molding. - An example method of making the
assembly 100 may generally include: (1) providing a mold made of known materials such as sand or plaster; (2) introducing a molten material into the mold; (3) allowing the molten material to harden a predetermined amount of time to form the molded unit; (4) stripping the molded unit from the mold; and (5) performing various finishing processes such as cleaning, trimming, machining, and/or balancing the molded unit. Other methods of forming theassembly 100 can also be used without departing from the scope of the invention. - The
exemplary assembly 100 may be made of a variety of materials. Generally, theassembly 100 may be made of any castable metal, such as, for example, iron, aluminum, zinc, magnesium, etc. Other materials may also be used depending on the desired use for theassembly 100. - A second embodiment of an
exemplary assembly 900 made in accordance with the present invention is shown in FIGS. 9 and 10. Theassembly 900 is similar to theassembly 100. However, theassembly 900 is designed to function more as a light, highly-efficient fan. - The
assembly 900 includes ahub 910. Thehub 910 may or may not function as the pulley system described in reference to theassembly 100. Alternatively, thehub 910 may be removed from theassembly 900 if not needed. - A plurality of
blades 940 form afan 925 disposed within theassembly 900. Ablade tip 945 of each of the plurality ofblades 940 extends to anouter diameter 905 of theassembly 900, andadjacent tips 945 define a plurality ofopenings 930 circumferentially spaced along theassembly 900outer diameter 905. - The
assembly 900 includes abaffle portion 920. Thebaffle portion 920 is constructed to extend in close proximity to a housing of a motor (not shown) onto which theassembly 900 is mounted. In this configuration, as explained above, thebaffle portion 920 may reduce leakage of air between thebaffle portion 920 and the housing of the motor, thereby increasing the efficiency of the fan. Theassembly 900 may therefore be advantageous in applications that require little or no additional inertia but would benefit from the high efficiency of thefan 925. - The
assembly 900 may be made using a variety of processes, for example, injection or compression molding. If injection molding is used, the steps for forming theassembly 900 may generally include: (1) providing a mold with a cavity; (2) injecting the cavity with a polymer under pressure; (3) allowing the polymer to solidify; (4) unclamping the mold; (5) removing the molded unit; and (6) performing various finishing processes such as trimming flash. Other processes may also be used. - The
assembly 900 may be made using a variety of materials. Preferably, theassembly 900 is made of a light material, such as a polymer, although other materials, such as lighter castable metals (e.g., aluminum), may also be used. - The above specification, examples and data provide a complete description of the manufacture and use of the composition of the invention. Since many embodiments of the invention can be made without departing from the spirit and scope of the invention, the invention resides in the claims hereinafter appended.
Claims (20)
1. A fan-flywheel-pulley assembly for use in conjunction with an electric motor, the assembly comprising:
a pulley positioned about a central axis;
a flywheel coupled to the pulley and positioned about the central axis, the flywheel including a baffle with an inner baffle diameter extending circumferentially over and in close proximity to a cylindrical wall unit of the motor, the baffle surrounding the motor to reduce air leakage between the baffle and the cylindrical wall unit; and
a fan coupled to the flywheel including a plurality of radial blades and positioned about the central axis.
2. The fan-flywheel-pulley assembly of claim 1 , wherein the flywheel extends circumferentially from an inner diameter to an outer diameter, the flywheel including an outer circumferential flywheel surface at least partially defining a plurality of circumferentially spaced openings.
3. The fan-flywheel-pulley assembly of claim 2 wherein the fan is disposed within the flywheel and wherein each of the plurality of radial blades extends at least from the inner baffle diameter to the outer diameter of the flywheel so that one of each of the plurality of openings are positioned between each adjacent blade of the plurality of blades.
4. The fan-flywheel-pulley assembly of claim 3 , wherein each of the plurality of radial blades extends past the inner baffle diameter towards the central axis.
5. The fan-flywheel-pulley assembly of claim 1 , wherein the inner baffle diameter engages the cylindrical wall unit of the motor.
6. The fan-flywheel-pulley assembly of claim 5 , wherein a gap between the baffle and the cylindrical wall unit is less than ¼ inch.
7. The fan-flywheel-pulley assembly of claim 1 , wherein each of the plurality of radial blades is curved.
8. The fan-flywheel-pulley assembly of claim 1 , wherein the baffle rotates with the assembly.
9. The fan-flywheel-pulley assembly of claim 1 , wherein the pulley, the fan, and the flywheel are integrally formed.
10. The fan-flywheel-pulley assembly of claim 9 , wherein the assembly is molded.
11. The fan-flywheel-pulley assembly of claim 1 , wherein the baffle extends over the cylindrical wall unit of the motor to increase an amount of inertia generated by the assembly.
12. A fan-flywheel-pulley assembly for use in conjunction with an electric motor, the assembly comprising:
a pulley positioned about a central axis;
a flywheel coupled to the pulley and positioned about the central axis, the flywheel including an outer circumferential flywheel surface at least partially defining a plurality of circumferentially spaced openings, and wherein a portion of the flywheel extends circumferentially about a cylindrical wall unit of the motor from an inner diameter to an outer diameter, wherein the portion creates a baffle positioned in close proximity to the cylindrical wall unit to limit a gap between the baffle and the cylindrical wall unit; and
a radial fan disposed within the flywheel and positioned about the central axis including a plurality of blades, wherein each of the plurality of blades extends at least from the inner diameter to the outer diameter of the flywheel so that one of the plurality of openings are positioned between each adjacent blade of the plurality of blades;
wherein the pulley, the flywheel, and the radial fan are integrally formed.
13. The fan-flywheel-pulley assembly of claim 12 , wherein the assembly is molded.
14. The fan-flywheel-pulley assembly of claim 12 , wherein the baffle extends over the cylindrical wall unit of the motor to increase an amount of inertia generated by the assembly.
15. The fan-flywheel-pulley assembly of claim 12 , wherein the gap between the baffle and the cylindrical wall unit is less than ¼ inch.
16. The fan-flywheel-pulley assembly of claim 12 , wherein the baffle rotates with the assembly.
17. An electric motor comprising:
a shaft rotatably mounted about a central axis;
a housing enclosing the motor and including a cylindrical wall unit having a front plate connected to a front end of the cylindrical wall unit and a back plate connected to a back end of the cylindrical wall unit; and
an integral fan-flywheel-pulley assembly coupled to the shaft including:
a pulley including a circumferential pulley surface extending along the central axis;
a flywheel coupled to the pulley and positioned about the central axis and extending circumferentially from an inner diameter to an outer diameter, the flywheel including an outer circumferential flywheel surface at least partially defining a plurality of circumferentially spaced openings and further including a baffle extending over and in close proximity to the cylindrical wall unit of the motor to reduce leakage of air between the baffle and the cylindrical wall unit and thereby improve air flow through the motor; and
a radial fan disposed within the flywheel and positioned about the central axis including a plurality of blades, wherein each of the plurality of blades are curved and extend at least from the inner diameter to the outer diameter of the flywheel so that one of each of the plurality of circumferentially spaced openings are positioned between each adjacent blade of the plurality of blades, and wherein the radial fan draws air through the motor;
wherein the pulley, the flywheel, and the radial fan are integrally formed.
18. The electric motor of claim 17 , wherein the baffle extends over the cylindrical wall unit of the motor to increase an amount of inertia generated by the assembly.
19. The electric motor of claim 17 , wherein a gap between the baffle and the cylindrical wall unit is less than ¼ inch.
20. The electric motor of claim 17 , wherein the baffle rotates with the assembly.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/754,091 US20040146397A1 (en) | 2001-12-19 | 2004-01-07 | Combination fan-flywheel-pulley assembly and method of forming |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/029,110 US6695581B2 (en) | 2001-12-19 | 2001-12-19 | Combination fan-flywheel-pulley assembly and method of forming |
US10/754,091 US20040146397A1 (en) | 2001-12-19 | 2004-01-07 | Combination fan-flywheel-pulley assembly and method of forming |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/029,110 Continuation US6695581B2 (en) | 2001-12-19 | 2001-12-19 | Combination fan-flywheel-pulley assembly and method of forming |
Publications (1)
Publication Number | Publication Date |
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US20040146397A1 true US20040146397A1 (en) | 2004-07-29 |
Family
ID=21847276
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US10/029,110 Expired - Fee Related US6695581B2 (en) | 2001-12-19 | 2001-12-19 | Combination fan-flywheel-pulley assembly and method of forming |
US10/754,091 Abandoned US20040146397A1 (en) | 2001-12-19 | 2004-01-07 | Combination fan-flywheel-pulley assembly and method of forming |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US10/029,110 Expired - Fee Related US6695581B2 (en) | 2001-12-19 | 2001-12-19 | Combination fan-flywheel-pulley assembly and method of forming |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3145061A1 (en) | 2015-09-17 | 2017-03-22 | ABB Technology AG | An electric power generator |
Families Citing this family (49)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7175570B2 (en) * | 1997-02-18 | 2007-02-13 | Nautilus, Inc. | Exercise bicycle frame |
US7226393B2 (en) * | 2001-01-19 | 2007-06-05 | Nautilus, Inc. | Exercise bicycle |
US6689019B2 (en) * | 2001-03-30 | 2004-02-10 | Nautilus, Inc. | Exercise machine |
US7455626B2 (en) * | 2001-12-31 | 2008-11-25 | Nautilus, Inc. | Treadmill |
US20030171191A1 (en) * | 2002-03-06 | 2003-09-11 | Nautilus, Inc. | Exercise bicycle handlebar |
US7217226B2 (en) * | 2003-02-04 | 2007-05-15 | Mcmillan Electric Company | Method and system for coupling a flywheel assembly onto a shaft of an electric motor using a self-holding taper |
US7083550B2 (en) * | 2004-09-20 | 2006-08-01 | Chen-Hui Ko | Motor and inertia flywheel arrangement of a fitness machine |
US7091635B1 (en) | 2004-10-20 | 2006-08-15 | Ametek, Inc. | Motor/flywheel assembly with shrouded radial cooling fan |
CN201383729Y (en) * | 2009-03-04 | 2010-01-13 | 中山大洋电机股份有限公司 | Motor for treadmill |
CN102141114B (en) * | 2011-01-22 | 2012-09-19 | 中山市天虹电机制造有限公司 | Motor clutch flywheel of industrial sewing machine and manufacturing method thereof |
US8776394B2 (en) | 2011-10-04 | 2014-07-15 | Whirlpool Corporation | Blower for a laundry treating appliance |
KR101258578B1 (en) | 2012-08-22 | 2013-05-07 | 안천영 | Fly wheel |
JP2014159867A (en) * | 2013-02-21 | 2014-09-04 | Kyocera Document Solutions Inc | Belt drive mechanism, belt drive device, and pulley |
CN104884133B (en) | 2013-03-14 | 2018-02-23 | 艾肯运动与健康公司 | Force exercise equipment with flywheel |
CN103603941A (en) * | 2013-11-11 | 2014-02-26 | 一拖(姜堰)动力机械有限公司 | Air-cooled crankshaft pulley |
US9403047B2 (en) | 2013-12-26 | 2016-08-02 | Icon Health & Fitness, Inc. | Magnetic resistance mechanism in a cable machine |
WO2015138339A1 (en) | 2014-03-10 | 2015-09-17 | Icon Health & Fitness, Inc. | Pressure sensor to quantify work |
US10717179B2 (en) * | 2014-07-28 | 2020-07-21 | Black & Decker Inc. | Sound damping for power tools |
US20160201643A1 (en) * | 2015-01-08 | 2016-07-14 | Milton Blake | Portable Hydroelectric Generator |
US10388183B2 (en) | 2015-02-27 | 2019-08-20 | Icon Health & Fitness, Inc. | Encouraging achievement of health goals |
CN104879442A (en) * | 2015-05-29 | 2015-09-02 | 青岛海之冠汽车配件制造有限公司 | Naturally-aspirated air-cooled clutch flywheel |
US10940360B2 (en) | 2015-08-26 | 2021-03-09 | Icon Health & Fitness, Inc. | Strength exercise mechanisms |
AT518218B1 (en) * | 2016-01-29 | 2017-12-15 | Traktionssysteme Austria Gmbh | Air-cooled electric machine |
US10293211B2 (en) | 2016-03-18 | 2019-05-21 | Icon Health & Fitness, Inc. | Coordinated weight selection |
US10561894B2 (en) | 2016-03-18 | 2020-02-18 | Icon Health & Fitness, Inc. | Treadmill with removable supports |
US10655724B2 (en) * | 2016-04-27 | 2020-05-19 | Dayco Ip Holdings, Llc | Asymmetric spoke design for torsional vibration dampers |
US10252109B2 (en) | 2016-05-13 | 2019-04-09 | Icon Health & Fitness, Inc. | Weight platform treadmill |
US11058914B2 (en) | 2016-07-01 | 2021-07-13 | Icon Health & Fitness, Inc. | Cooling methods for exercise equipment |
EP3301405A1 (en) | 2016-09-29 | 2018-04-04 | Siemens Aktiengesellschaft | Verbinden einer motorwelle eines motors mit einem drehgeber |
US10918905B2 (en) | 2016-10-12 | 2021-02-16 | Icon Health & Fitness, Inc. | Systems and methods for reducing runaway resistance on an exercise device |
DE102017101773A1 (en) * | 2017-01-30 | 2018-08-02 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Rotor construction with axial cover |
TWI756672B (en) | 2017-08-16 | 2022-03-01 | 美商愛康有限公司 | System for opposing axial impact loading in a motor |
US11187285B2 (en) | 2017-12-09 | 2021-11-30 | Icon Health & Fitness, Inc. | Systems and methods for selectively rotationally fixing a pedaled drivetrain |
US11058913B2 (en) | 2017-12-22 | 2021-07-13 | Icon Health & Fitness, Inc. | Inclinable exercise machine |
US11000730B2 (en) | 2018-03-16 | 2021-05-11 | Icon Health & Fitness, Inc. | Elliptical exercise machine |
EP3815226B1 (en) | 2018-06-11 | 2023-05-31 | iFIT Inc. | Increased durability linear actuator |
TWI721460B (en) | 2018-07-13 | 2021-03-11 | 美商愛康運動與健康公司 | Cycling shoe power sensors |
TWI761125B (en) | 2019-01-25 | 2022-04-11 | 美商愛康有限公司 | Interactive pedaled exercise device |
US11298577B2 (en) | 2019-02-11 | 2022-04-12 | Ifit Inc. | Cable and power rack exercise machine |
US11426633B2 (en) | 2019-02-12 | 2022-08-30 | Ifit Inc. | Controlling an exercise machine using a video workout program |
US11794070B2 (en) | 2019-05-23 | 2023-10-24 | Ifit Inc. | Systems and methods for cooling an exercise device |
US11534651B2 (en) | 2019-08-15 | 2022-12-27 | Ifit Inc. | Adjustable dumbbell system |
TWI776250B (en) | 2019-10-11 | 2022-09-01 | 美商愛康有限公司 | Modular exercise device |
US11673036B2 (en) | 2019-11-12 | 2023-06-13 | Ifit Inc. | Exercise storage system |
CN110966314B (en) * | 2019-11-30 | 2021-06-04 | 重庆市鼎然工贸有限公司 | Cooling device for clutch and clutch |
US11931621B2 (en) | 2020-03-18 | 2024-03-19 | Ifit Inc. | Systems and methods for treadmill drift avoidance |
US11951377B2 (en) | 2020-03-24 | 2024-04-09 | Ifit Inc. | Leaderboard with irregularity flags in an exercise machine system |
US11878199B2 (en) | 2021-02-16 | 2024-01-23 | Ifit Inc. | Safety mechanism for an adjustable dumbbell |
CN114198459B (en) * | 2021-11-29 | 2023-03-21 | 中国原子能科学研究院 | Flywheel disc and flywheel structure |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2932447A (en) | 1958-05-07 | 1960-04-12 | Russell E Phelon | Flywheel for use with an internal combustion engine |
AT215531B (en) * | 1959-07-28 | 1961-06-12 | Bosch Gmbh Robert | AC machine |
US3838301A (en) | 1973-02-09 | 1974-09-24 | Hitachi Ltd | Electric machine with flywheel-fan |
US3906266A (en) | 1974-02-22 | 1975-09-16 | Black & Decker Mfg Co | High inertia insulating cooling fan for electric motor device |
US3952712A (en) * | 1975-01-30 | 1976-04-27 | Tecumseh Products Company | Composite flywheel assembly |
JPS55153898A (en) * | 1979-05-17 | 1980-12-01 | Matsushita Electric Ind Co Ltd | Rotary machine provided with fan and pulley |
JPS5981835A (en) | 1982-11-01 | 1984-05-11 | Sony Corp | Color cathode ray tube display device |
US4980592A (en) * | 1989-09-01 | 1990-12-25 | Textron, Inc. | Flywheel magnet rotor assembly |
US5070268A (en) | 1990-03-12 | 1991-12-03 | R. E. Phelon Company, Inc. | Rotor of a magnetomotive device |
JPH0549215A (en) | 1991-08-09 | 1993-02-26 | Nippondenso Co Ltd | Generator |
US5245954A (en) | 1992-07-02 | 1993-09-21 | Outboard Marine Corporation | Axial fan flywheel |
JPH0686519A (en) | 1992-08-31 | 1994-03-25 | Mitsubishi Electric Corp | Permanent-magnet generator |
US5476430A (en) | 1994-10-28 | 1995-12-19 | Lumex, Inc. | Exercise treadmill with variable response to foot impact induced speed variation |
US5735669A (en) | 1996-07-31 | 1998-04-07 | Ryobi North America | Fly wheel assembly and method of forming |
JPH1141890A (en) | 1997-07-23 | 1999-02-12 | Kokusan Denki Co Ltd | Flywheel with pulley groove |
-
2001
- 2001-12-19 US US10/029,110 patent/US6695581B2/en not_active Expired - Fee Related
-
2004
- 2004-01-07 US US10/754,091 patent/US20040146397A1/en not_active Abandoned
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3145061A1 (en) | 2015-09-17 | 2017-03-22 | ABB Technology AG | An electric power generator |
Also Published As
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US20030113209A1 (en) | 2003-06-19 |
US6695581B2 (en) | 2004-02-24 |
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