Suction Pump Or Fan Patents (Class 310/62)
  • Publication number: 20020057022
    Abstract: A fan motor with an improved inhaling structure so as to enhance ventilation efficiency and performance, as well as cooling performance. An outer housing member 7 has a respective face opposite to a drive unit 11. An intake hole 13 of an arbitrary diameter is provided in a first face of the outer housing member 7, while another intake hole 15 of an arbitrary diameter is provided in a second face thereof. Both intake holes 13 and 15, however, are formed to have a larger diameter than the diameter of a rotor 4 defined by the peripheral side face thereof, thus enabling air to be drawn in directly to the respective faces of the fan blades 3, without being hindered by the rotor 4. Moreover, the intake holes 13 and 15 are formed to define a certain portion in which the air is drawn in from one side of a fan 5 only.
    Type: Application
    Filed: January 18, 2002
    Publication date: May 16, 2002
    Inventor: Katsuhiko Yamamoto
  • Patent number: 6384494
    Abstract: A motor-driven fan includes an electric motor including a rotor and a stator in which the rotor includes an essentially cup-shaped cap which extends at least partly around the stator and has a plurality of lateral exit openings adjacent the bottom wall, and an impeller or fan including a hollow hub from which extends a plurality of main outer fan blades. This hub has a front wall fixed to the back wall of the cap of the rotor and a lateral skirt which surrounds the lateral wall of the cap in a radially spaced relationship. The hub is further provided with inner ventilation blades acting in operation to generate a cooling air stream which passes through the motor.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: May 7, 2002
    Assignee: Gate S.p.A.
    Inventors: Maurizio Avidano, Virgilio Crestani
  • Patent number: 6373166
    Abstract: A ratio (L2/L1) between an axial length L1 of disk portions and a length L2 of a stator core over lapping the disk portions in a radial direction is 0.3 or more, and a ratio (R2/R1) between an outside radius R1 of claw-shaped magnetic poles and an outside radius R2 of a cylindrical portion is within a range of 0.50 to 0.54.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: April 16, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshihito Asao, Katsumi Adachi
  • Patent number: 6369471
    Abstract: An SRE fan has a hub, a carrier extending outwardly of the hub and a plurality of vanes on a first side of the carrier. The carrier has a second side opposite the first side that is configured to contact an engagement surface of a rotor segment. Channels are provided on the second side of the carrier. Rotor coil leads are surrounded by respective compressible insulated sleeves and are each routed through respective channels. The geometry of the channels is adapted to cooperate with the engagement surface of the rotor to enclose the channels and establish a uniform channel depth. The depth is selected to be less than an uncompressed diameter of the sleeves so as to provide a measure of compression when the fan contacts the rotor, holding the leads in place.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: April 9, 2002
    Assignee: Delphi Technologies, Inc.
    Inventors: Mitchell L. Whitted, Steve J. Shields
  • Patent number: 6361291
    Abstract: The invention relates to a fuel delivery unit, having a side channel pump that in a housing (13) has a pump chamber (14) and in the pump chamber (14) has an impeller (16), and having an electric motor (12) that drives the impeller (16) and has a stator and a rotor (29). The impeller (16) of the fuel delivery unit is the rotor (29) of an asynchronous motor. The electric motor (12) can be assembled from only a few, highly reliable and strong components.
    Type: Grant
    Filed: April 3, 2000
    Date of Patent: March 26, 2002
    Assignee: Robert Bosch GmbH
    Inventors: Klaus Dobler, Michael Huebel, Willi Strohl
  • Patent number: 6351046
    Abstract: A dynamoelectric machine having a single internal centrifugal fan and a bearing design that places a bearing outboard of the pulley to produce a more compact and less expensive device. One bearing is mounted outboard of the pulley, substantially reducing or eliminating cantilever forces on the pulley. The pulley and fan are designed with an inner diameter in a shape to fit splines which are part of the rotor shaft, eliminating the need for any type of axial clamping nut.
    Type: Grant
    Filed: January 13, 2000
    Date of Patent: February 26, 2002
    Assignee: Delphi Technologies, Inc.
    Inventor: Michael Duane Bradfield
  • Patent number: 6351044
    Abstract: A cooling apparatus integrally formed within a casing for an electronic device. A mounting board has heat generating members and the cooling apparatus mounted thereto. In an embodiment, a cooling fan having a flat motor is integrally formed with the mounting board by directly fixing a stator coil and a bearing of a motor on the mounting board. The reduced thickness of this structure permits the circuit element to be arranged on the bottom side of the mounting board, permitting increased surface area for the mounting of components of the electronic device. In another embodiment, the mounting board is made of multiple layers, and the field coils form a flat stator on the multiple layers of the mounting board. A bearing is integrally formed in the multiple layers of the mounting board.
    Type: Grant
    Filed: January 14, 1999
    Date of Patent: February 26, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Masaharu Miyahara
  • Patent number: 6348748
    Abstract: A fan motor with an improved inhaling structure so as to enhance ventilation efficiency and performance, as well as cooling performance. An outer housing member 7 has a respective face opposite to a drive unit 11. An intake hole 13 of an arbitrary diameter is provided in a first face of the outer housing member 7, while another intake hole 15 of an arbitrary diameter is provided in a second face thereof. Thus, a substantial amount of air is taken in from the two faces of the outer housing member 7, thereby drastically improving the ventilation efficiency. Even though an inhaling passage is not ensured substantially on a top face of the outer housing member 7, the air is able to be inhaled even through a slight clearance due to the other intake hole 15, thus improving the cooling performance. The air taken in from the intake holes 13 and 15 of the outer housing member 7 is smoothly discharged toward the exhaust direction of a fan 5, without striking on walls of a casing 1 and a cover 12.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: February 19, 2002
    Assignee: Toshiba Home Technology Corporation
    Inventor: Katsuhiko Yamamoto
  • Publication number: 20020017823
    Abstract: An automotive alternator which can realize high output and efficiency, and in which noise may be reduced includes: a polyphase stator winding 16 comprising a number of winding portions in which long wire strands 30 are wound so as to alternately occupy an inner layer and an outer layer in a slot 15a depth direction within the slots 15a at intervals of a predetermined number of slots 15a, the wire strands 30 folding back outside the slots 15a at axial end surfaces of a stator core 15 to form turn portions 30a; the turn portions 30a of the wire strands 30 being roughly the same shape and aligning at roughly the same pitch in a circumferential direction to constitute coil end groups 16a, 16b; the coil end groups 16a, 16b being disposed in a plurality of rows in the radial direction; fans 5 being provided at axial end portions of a rotor 7 roughly facing the coil end groups 16a, 16b and generating cooling air D flowing in a radial direction to ventilate the coil end groups 16a, 16b.
    Type: Application
    Filed: January 25, 2001
    Publication date: February 14, 2002
    Inventor: Yoshihito Asao
  • Patent number: 6335579
    Abstract: An electric motor with a permanent-magnet rotor having a viscous coupling to the shaft. In its electric part, the motor can be likened to a permanent-magnet synchronous motor, in which the rotor is mounted freely on the shaft and is contained in a hermetic casing which is rigidly coupled to the shaft and contains a liquid which fills the gap between the rotor and the container. The rotor therefore drives the casing only by virtue of the presence of the interposed liquid, so that the load is not rigidly connected to the shaft and the resulting operation of the motor can be likened to that of an asynchronous motor allowing mutually different rotation rates of the shaft and of the rotating field.
    Type: Grant
    Filed: March 16, 2000
    Date of Patent: January 1, 2002
    Assignee: Askoll Holding S.R.L.
    Inventor: Elio Marioni
  • Patent number: 6331743
    Abstract: A magnetic fan clutch having a magnetic field coupling which uses a light weight, strong plastic driving member and driven member to rotate fan blades which are also made of plastic. The fan clutch also uses a plastic mounting member for attaching to a vehicle. Plastic may be used for a vehicle or truck fan clutch because the magnetic coupling between the series of coils on the driving member and the magnetic elements on the driven member may be modulated to provide a slower torque transfer from zero to a full torque transfer over a longer controlled period of time such as over six seconds to eliminate the relatively sharp impact torque transfer pulse heretofore found in fan clutches. This slower and modulated torque transfer with slippage between the driving member and driven member during the torque transfer period reduces the fast acceleration and the resistant high inertia and torque loads of conventional fan clutches as typically found in vehicles or other heavy duty applications.
    Type: Grant
    Filed: August 4, 1999
    Date of Patent: December 18, 2001
    Assignee: American Cooling Systems, LLC
    Inventor: Larry Ray Link
  • Publication number: 20010048253
    Abstract: An elevator hoist apparatus comprising the ventilation passage within a motor frame that includes an inlet suction port at one end, a flow passage extending through the motor and upper and lower discharge ports at the other end of the motor frame. The upper discharge port is at a position above the horizontal plane including the motor axis by 45 degrees and the lower discharge port is at a position below the horizontal plane. A blower is connected to each discharge ports, thereby generating a substantially uniform flow of cooling air within the motor frame. Therefore, the flow of cooling air generated within the motor frame is substantially uniform, eliminating stagnation region and uneven cooling, improving the cooling efficiency. Also, since two blowers are disposed both above and below the horizontal plane H, the load on a single blower is small, allowing a small-sized blower to be used and the overall size of the elevator hoist apparatus can be made small.
    Type: Application
    Filed: November 30, 2000
    Publication date: December 6, 2001
    Inventors: Kazuaki Nakamura, Hukami Aoki
  • Patent number: 6307288
    Abstract: A motor has a shaft with a lengthwise through hole in a center, and a guider of a semi-circular shape having plural helical leaves to increase sucking force for gas or liquid, strengthening sucking smoothness. Water current flowing through the water passageway performs heat-dispersing function when the motor operates so as to prolong the service life of the motor. A pressure-dividing ball is placed in front of the guider to divide strong current pressure into several small current pressures to be sucked by the motor to avoid turbulent current and cause idle rotation of the motor to be damaged. Then the motor surely has strong sucking force, smoothness of flowing and its service life effectively prolonged.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: October 23, 2001
    Inventor: Ching-Yuan Chiang
  • Publication number: 20010030487
    Abstract: In an automotive alternator having a case in which air intake vents 1a and air discharge vents 1b are disposed, a rotor, which is fastened to a shaft such that claw-shaped magnetic poles intermesh, has as a pair of fans having a plurality of blades and fastened to the axial end surfaces of poles cores, and is rotatably disposed in the case, a stator core to which a plurality of slots are formed and a stator having a stator winding to be accommodated in the slots, the slots are formed in an even number, each of the claw-shaped magnetic poles is formed in an even number, and said blades of the pair of fans are formed in the same odd number, respectively. With this construction, there can be provided a small automotive alternator which has a high output and an excellent cost performance and in which fans generate a low level of noise.
    Type: Application
    Filed: December 18, 2000
    Publication date: October 18, 2001
    Inventors: Kyoko Higashino, Yoshihito Asao
  • Patent number: 6300694
    Abstract: A cooling fan for an electric treadmill motor comprising an induced-draft fan of an independently running motor disposed at one side of said treadmill motor and covered with a protection hood and a support, wherein said induced-draft fan keeps at a constant air draft power no matter how fast said treadmill motor runs in order to compulsorily perform a strong cooling operation so that the air rapidly passes from a cooling air inlet at the other side of said treadmill motor through an armature inside of said treadmill motor and completely exhausted from an air outlet of said treadmill motor adjacent to said induced-draft fan in order to achieve a cooling effect and to prevent said armature of said treadmill motor from being burnt down due to being overheated.
    Type: Grant
    Filed: December 6, 1999
    Date of Patent: October 9, 2001
    Inventors: Leao Wang, Peter Wu
  • Patent number: 6297571
    Abstract: An electrical machine formed as a fluid-cooled three-phase alternating current generator has a cup-shaped housing, a stator arranged in the housing, a drive system, a shaft driven by the drive system, a claw pole rotor system mounted on the shaft, the claw pole rotor system including a first pole ring which is mounted on the shaft, formed as a pole wheel half and runs in claws, and a second pole ring which is formed as a pole wheel half and runs also in claws, so that tips of the claws of one of the pole rings extend in gaps between the claws of the other pole ring, pole rings producing a cooling air stream in the housing for withdrawing heat which is generated in the machine by convection through an outer casing of the housing to fluid medium which surrounds the housing, a plurality of substantially radially extending blower vanes formed on substantially flat end side of a respective one of the pole rings which is located at a side opposite to the drive system, and a ring chamber closing the blower vanes in
    Type: Grant
    Filed: January 19, 1999
    Date of Patent: October 2, 2001
    Assignee: Robert Bosch GmbH
    Inventor: Uwe Knappenberger
  • Patent number: 6294852
    Abstract: A motor cover arrangement for covering a cooling fan of a motor enclosed in a motor case, wherein the motor cover arrangement includes a cooling fan cover and an air intake hood. The cooling fan cover is partially constructed by a bowl shape cover body and an arc shape guiding frame having a guiding lip integrally extended therefrom for regulating air sucking from an air intake window and discharging from an air discharge slot. Therefore, the discharging air and the intaking air are respectively partitioned by the guiding lip to prevent the discharging air from returning back into the motor, so as to enhance the circulated motion of the air cycle in the motor cover arrangement and increase both the air sucking effect and cooling effect of the motor.
    Type: Grant
    Filed: December 27, 2000
    Date of Patent: September 25, 2001
    Inventor: Wy Peron Lee
  • Patent number: 6271608
    Abstract: An AC generator comprises a rotor 25 within a stator 24. The rotor carries a fan 27 at one end of the stator. The fan 27 is within a casing 30 which forms volume discharge passages 32. The fan 27 has blades 31 which project from the hub 28 at an angle which is oblique to the radial whereby those blades 31 trail the radial. The stator windings 23 form terminal leads 34 which are led from the end of the stator 24 remote from the fan 27. A circumferential array of cleats 35 which each have the form of a comb, support and guide the terminal leads 34 circumferentially, spaced from one another, to a certain location at the top from which the leads are taken and connected to terminals above. Those terminals are formed by the lower ends of busbars (56 to 58, 61 to 69) which extend through and which are supported by a structural panel of insulating material which forms an insulating barrier between the ends of those busbars.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: August 7, 2001
    Assignee: Newage International Limited
    Inventors: Lawerence Haydock, Peter John Wyles, John Ernst Clive Bean
  • Publication number: 20010010434
    Abstract: Since a structure of a cooling fan of an alternative current generator for a vehicle is formed with a resin molding product having an insert metal fitting, a freedom degree on said fan design shape configuration and said installation performance of said fan to a core can be compatible. A cooling fan structure having a high shape configuration design freedom degree and having an installation strength similar to that of said fan according to said prior art can be obtained.
    Type: Application
    Filed: January 31, 2001
    Publication date: August 2, 2001
    Applicant: Hitachi, Ltd.
    Inventors: Sakae Ishida, Susumu Sasaki, Yoshiaki Honda
  • Patent number: 6246134
    Abstract: An apparatus (10) and method for applying air to cool an electrical power generator (15) is provided. The apparatus (10) preferably includes a housing (12), a power generator (15) positioned in the housing (12), and a heat transfer device (20) positioned within the housing (12) and adjacent and in fluid communication with air contacting the power generator (15) for receiving relatively hot air from the electrical power generator (15), transferringly cooling the relatively hot air with relatively cooler air received from outside the housing (12) without allowing the relatively hot air to contact and mix with the relatively cooler air, and supplying cooled air from within the housing (12) to the power generator (15).
    Type: Grant
    Filed: July 7, 1999
    Date of Patent: June 12, 2001
    Assignee: Siemens Westinghouse Power Corporation
    Inventors: David Berrong, Calvin Paris
  • Patent number: 6239521
    Abstract: A motor cover arrangement for covering a cooling fan of a motor enclosed in a motor case, wherein the motor cover arrangement includes a cooling fan cover and an air intake hood. The cooling fan cover has an open outlet end mounted on the motor case and an inlet end extended from the motor case to define a fan cavity to dispose the cooling fan therein and an air inlet opening in front of the cooling fan. The outlet end of the cooling fan cover defines an air discharge slot between the outlet end and the motor case to communicate with the air inlet opening. The air intake hood includes a base shell integrally covering the air inlet opening of the cooling fan cover and an air intake shell extended from the base shell to a side portion of the cooling fan cover to provide an air intake window so as to form an air intake passage between the air intake window positioned at the side portion of the cooling fan cover and the air inlet opening of the cooling fan cover.
    Type: Grant
    Filed: January 25, 2000
    Date of Patent: May 29, 2001
    Inventor: Wy Peron Lee
  • Patent number: 6232683
    Abstract: In an automotive alternator, a thick-walled guide portion for guiding external air from an opening towards a heat sink main body is formed opposite fins on part of an outer circumferential portion of a bearing housing portion of a rear bracket.
    Type: Grant
    Filed: January 13, 2000
    Date of Patent: May 15, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Koichi Hirai, Katsumi Adachi
  • Patent number: 6223740
    Abstract: A gas-fired forced draft air heating furnace is provided with a specially designed self-cooling draft inducer fan that overlies an inshot-type burner section of the furnace and is operatively supported on a heat exchanger plenum portion of the furnace housing. The fan motor is supported on an outboard housing side of the fan, and an umbrella cooling fan is coaxially secured to an outboard end of the fan drive shaft. During operation of the draft inducer fan, the umbrella fan is rotationally driven to direct a flow of ambient cooling air toward the outboard side of the draft inducer fan housing in a manner causing the air flow to sequentially contact and cool the outer shaft end bearing area, the motor windings and the inner shaft end bearing area at the outer side of the draft inducer fan housing.
    Type: Grant
    Filed: May 10, 2000
    Date of Patent: May 1, 2001
    Assignee: Rheem Manufacturing Company
    Inventors: Seung-Ho Kim, Robert I. Kepesky, Walter S. Painter
  • Patent number: 6215212
    Abstract: A shaftless rotor (12) for a dynamoelectric machine includes a stack (20) of ferrous laminations (22) provided with a central opening (110) extending through the stack (20) and adapted to be located on the axis of rotation (14) of the rotor (12). A sleeve (112) is located in the central opening (110) for orienting the laminations (22) with respect to one another. Manifold and vane clamping pieces (52) are located on opposite sides of the stack (20) and engage the endmost laminations (22) and the sleeve (112). A pair of spaced shaft segments (24,26) engage respective ones of the clamping pieces (52) and a single tie bolt (32) extends through the sleeve (112) between the shaft segments (24,26) to interconnect the same. The tie bolt is in tension to apply clamping force to the shaft segments (24,26) for transmittal to the clamp pieces (52) to the laminations (22) in the stack (20).
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: April 10, 2001
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Robert Grennan, William Greenlee, David Halsey, W. Glen Smith
  • Patent number: 6208052
    Abstract: A cooling module 10 of short axial length includes a fan 18 having a plurality of blades 16. A shroud structure 12 is spaced from and generally adjacent to the blades 16. A brushless electric motor 22 rotates the blades 16. The motor 22 includes a heat sink structure 24 coupled to the shroud structure 12 and defines a base of the motor 22. A shaft 32 is fixed to the heat sink structure 24. A rotor 34 is mounted for rotation with respect to the shaft 32. The fan 18 is coupled to the rotor 34. Magnets 48 are fixed in relation to the rotor 34. A lamination core 56 is fixed to the heat sink structure 24. A winding is wound about the lamination core 56 and is operatively associated with the magnets 48.
    Type: Grant
    Filed: August 18, 1999
    Date of Patent: March 27, 2001
    Assignee: Siemens Canada Limited
    Inventors: Peter A. Kershaw, Marek Horski
  • Patent number: 6194798
    Abstract: A DC driven fan with blades made of magnetized material and permanently magnetized in the radial direction and cooperating with a plurality of electromagnetic stator coils mounted external to the outer fan edges. Adjacent blades have alternate N-S, S-N radial magnetic orientations. In one embodiment, the blades are mounted in a non-ferrous hub and in an alternate embodiment they are mounted in a ferrous hub so that adjacent blades function like a U or V-shaped magnet. Blades can be made of magnetized ferrous, ferromagnetic, or magnetized plastic depending upon the application and blade strength specifications.
    Type: Grant
    Filed: October 14, 1998
    Date of Patent: February 27, 2001
    Assignee: Air Concepts, Inc.
    Inventor: Edward Lopatinsky
  • Patent number: 6191511
    Abstract: In order to assure efficient cooling and a temperature balance between the stator and the rotor, an asynchronous electric motor is provided containing a closed cooling liquid circuit which passes successively into the stator (1) and into the shaft (3) of the rotor, over the entire length of the stator and the rotor. A pump (15) is incorporated in the rotor shaft. The liquid is injected into the pump by a stationary axial tube (16) and comes out again between the shaft and this tube. The pump includes a centrifugal pumping member (20) fixed to the bottom of the bore of the shaft, and longitudinal-blades (21) fixed to the shaft facing an external helicoid rib (17) of the injection tube. The liquid is cooled by the ambient air along the periphery of the stator.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: February 20, 2001
    Assignee: The Swatch Group Management Services AG
    Inventor: Ernst Zysset
  • Patent number: 6172433
    Abstract: In an alternating current generator and fans thereof in accordance with the invention, the cooling efficiency of the alternating current is improved by fans fixed to a rotor. When the fans are formed during a press working operation, the blades are formed directly from the fans by cut-raising the fans toward a bracket side to form blades and simultaneously cut-raising protruding potions toward a rotor side to form protrusions. This design allows for both improvement in cooling efficiency of the alternating current generator and ease of manufacture of the fans.
    Type: Grant
    Filed: August 19, 1999
    Date of Patent: January 9, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Yoshihito Asao
  • Patent number: 6157104
    Abstract: An electronic component cooling apparatus capable of permitting a sufficient amount of air to be fed to an electronic component to be cooled. An impeller which includes a plurality of blades for sucking air from one side in an axial direction of a revolving shaft of a motor is fixed on a rotor of the motor. A casing having a cylindrical cavity defined therein in which the motor and impeller are received is constructed of a peripheral wall arranged so as to surround the impeller and a closing wall for closing an end of the cavity on the other side in the axial direction. The peripheral wall is formed at a portion thereof in proximity to an end thereof on the one side with a lateral discharge port through which air suckedly introduced into the cavity is discharged so that a surrounding portion for surrounding a whole circumference of the impeller is left at a portion of the peripheral wall in proximity to an end on the other side.
    Type: Grant
    Filed: April 19, 1999
    Date of Patent: December 5, 2000
    Assignee: Sanyo Denki Co., Ltd.
    Inventors: Shinjiro Yokozawa, Nobumasa Kodama, Toshiki Ogawara, Yuichi Kodaira, Michinori Watanabe
  • Patent number: 6144121
    Abstract: A motor-driven tool is provided with a grip on which a switch is placed, and the grip is coupled to the middle of a cylindrical housing which houses a motor in its rear end and a motor output decelerator in front of the motor in its front end. A deceleration rotation output shaft is provided in the front of the housing. The motor houses an axial flow fan for air intake in the rear and a centrifugal fan for exhaust in the front and has intake air openings in the rear side and an exhaust air opening in a front side surface. The cylindrical housing also has an intake opening that connects to the intake air opening in the rear side of the motor and an exhaust opening that connects to the motor exhaust air opening at the position where the front of the motor is located.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: November 7, 2000
    Assignee: Matsushita Electric Works Ltd.
    Inventors: Yosuke Ishida, Natsuhara Tsutomu
  • Patent number: 6130491
    Abstract: In a circuit-integrated motor, it is an object of the invention to solve a problem that high power output is hampered by a heated electronic component, and to provide a compact high-power motor with a self-cooling fan which is capable of affording a significant cooling effect on the electronic component and winding wire. A self cooling fan (15) disposed close to and in an opposed relation to a top face of a rotor frame (11) has a peripheral-face opening (16), and an electronic component or a radiator attached with the electronic component is located in the course of a flow passage (17) of cooling air guidedly discharged from the peripheral-face opening (16).
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: October 10, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Seiji Mitamura, Haruki Kato
  • Patent number: 6124653
    Abstract: In a generator which is operated according to the induced-draft-cooling principle and in which a main fan (11), attached to the rotor shaft (12) of the generator, draws cooling medium, which is heated by the heat-generating elements of the generator, out of the generator and transports it essentially perpendicularly to the axis of this rotor shaft (12) to a cooling arrangement (23), the drawn-in cooling medium, which is expelled with a swirl at high velocity by the main fan (11), being received by a cooling-duct casing (33), which directs the cooling medium to the cooling arrangement (23) via at least one fluidic constriction (41), the directing of the cooling medium, while efficiently avoiding vortices and pressure drops, is achieved in that the cooling-duct casing (33) has at least one overflow duct (66), which receives the cooling medium, expelled into the cooling-duct casing (33) by the main fan (11), via an inflow zone (58) upstream of the constriction (41), diverts the cooling medium around the constric
    Type: Grant
    Filed: April 19, 1999
    Date of Patent: September 26, 2000
    Assignee: Asea Brown Boveri AG
    Inventors: Daniel Hediger, Gianfranco Guerra
  • Patent number: 6124660
    Abstract: An AC generator for vehicles includes a field rotor, a stator disposed around said field rotor and a frame for supporting the rotor and the stator. The stator has a laminated core having a plurality of slots, aluminum conductors housed in the slots, and an electric insulator. The aluminum conductor is constituted by in-slot portion and a crossover portion for connecting an in-slot portion in one slot to another in-slot portion in a different slot to provide a winding as a whole. The frame is provided with a plurality of windows substantially in a whole periphery thereof at portions encircling the crossover portions and substantially in an outer diametrical direction opposite to the crossover portions.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: September 26, 2000
    Assignee: Denso Corporation
    Inventors: Atsushi Umeda, Tsutomu Shiga, Shin Kusase
  • Patent number: 6119636
    Abstract: A portable gasoline generator, constructed with an engine and a generator, provides a lightweight and compact size for easy storage and carrying by minimizing its weight and size of the alternator (generator) thereof. The generator includes a generator case which houses a stator and a rotor unit that is coaxially coupled with a driving end of the crankshaft. The rotor unit includes a rotor cap and a plurality of arc-shaped rotor magnets made of rare-earth metal circularly attached to an inner circumferential surface of a surrounding ring of the rotor cap. The rotor cap is constructed to function as an exhausting fan by puncturing a plurality of fan wings aligned radially and forming a plurality of fan vents thereon. The stator is coaxially affixed to a generator cup of the generator case, wherein the stator is coaxially positioned within the rotor cap that the rotor magnets are arranged to coaxially surround the stator.
    Type: Grant
    Filed: June 11, 1999
    Date of Patent: September 19, 2000
    Inventor: Guo Xiang Fan
  • Patent number: 6121698
    Abstract: Disclosed is a motor and pump which operate completely submerged in the pump fluid which uses surrounding fluid to cool the heat generated within the motor. The motor is also built with the intention that it can run in non-submerged applications by placing a cooling jacket around the stator portion of the motor and passing a cooling fluid through the jacket to absorb the motor heat. The cooling system disclosed is such that it can be filled with a fluid circulated within the system but not in direct contact with the fluid being pumped within the pump. Preferably the cooling system includes a flow control tube for use in controlling the flow rate of the cooling liquid and an expansion tank for use in limiting the pressure of the cooling fluid in the cooling system.
    Type: Grant
    Filed: July 28, 1999
    Date of Patent: September 19, 2000
    Assignee: Fairbanks Morse Company
    Inventor: James H Sexton
  • Patent number: 6097116
    Abstract: In a turbo-generator (10) having a rotor (11) and a stator (12) concentrically surrounding the rotor (11) and separated from the rotor (11) by an air gap (14), and also having a cooling arrangement in which a main fan (33) draws in a gaseous cooling medium flowing through corresponding cooling passages in the rotor (11) and in the stator (12) and forces it through a cooler (22, 23, 24) back into the cooling passages, the cooling medium flowing through the rotor (11) in the axial direction, issuing in a heated state into the air gap (14) and being returned from the air gap (14) to the main fan (33), improved rotor cooling is achieved in that the cooling medium heated by the rotor (11) is directed radially outward from the air gap (14) through outflow passages (15) in the stator (12) and is returned to the main fan (33) outside the stator (12) via a cooling-air return (21).
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: August 1, 2000
    Assignee: ABB Research Ltd.
    Inventors: Stephan Hess, Reinhard Joho, Jens von Wolfersdorf, Hans Zimmermann, deceased
  • Patent number: 6091176
    Abstract: A motor shaft assembly method for easily and inexpensively assembling a motor shaft with components and a motor housing eliminates the need for a snap ring or a threaded nut to retain the components on the shaft.
    Type: Grant
    Filed: April 19, 1999
    Date of Patent: July 18, 2000
    Assignee: Shop Vac Corporation
    Inventors: Melvin Eugene Wolfe, Jr., Mark Earnest Baer, James Frank Streeter
  • Patent number: 6091169
    Abstract: It is an object of this invention to provide a compact high-power alternator for a vehicle. An alternator (1) for a vehicle includes a stator (2) and a rotor (3). The stator (2) serves as an armature. The rotor (3) operates to generate magnetic field. A front cooling fan (12) and a rear cooling fan (13) are fixed to two axial-direction ends of the rotor (3) respectively. The outside diameter (R0) of the cooling fans (12, 13) is equal to the outside diameter (R1) of the rotor (3) which is multiplied by a value of 0.90 to 0.96. The stator (2) includes a stator iron core (32), a stator winding, and an insulator (34) for providing insulation between the stator iron core (32) and the stator winding. Coil end groups (31a, 31b) extend from axial-direction end surfaces of the stator iron core (32) respectively. In the coil end groups (31a, 31b), gaps are formed between portions of the stator winding.
    Type: Grant
    Filed: September 28, 1998
    Date of Patent: July 18, 2000
    Assignee: DENSO Corporation
    Inventors: Atsushi Umeda, Tsutomu Shiga, Shin Kusase
  • Patent number: 6069423
    Abstract: A motor cooling and sound absorbing system includes a housing (10) forming a chamber (13) around a motor (11). The shaft (12) of the motor (11) carries a fan (40) positioned in a chamber (38) formed by a recess (36) cut in a foam block (35). The fan (40) draws air into the chamber (13) through inlet apertures (33) in the housing (10) and this air is directed past the motor (11) to cool it. The air exits the fan (40) generally radially against an angled surface (37) of the recess (36) of the foam block (35). The air is then received in a diffuser passageway (41) defined by the angled surface (37) and an angled surface (42) of a choke plate (19) positioned above the foam block (35). The diffuser passageway (41) reduces the velocity of the air to assist the foam block (35) in absorbing the noise generated thereby, while at the same time reducing the pressure at the exit of the fan (40) to increase the cooling air flow past the motor (11).
    Type: Grant
    Filed: April 21, 1999
    Date of Patent: May 30, 2000
    Assignee: Vita-Mix Corporation
    Inventors: Brent A. Miller, Jim Lachendro, Curt M. Geideman, Richard D. Boozer, Paul K. Foisy
  • Patent number: 6069794
    Abstract: A bushing for combining a fan and heat sink avoids a rack usually required in a conventional combination of fan and heat sink for CPU cooling, and thereby minimizes assembly height and forms a super-thin heat dispersion mechanism. A honeycomb heat sink is designed to increase heat dispersion area for a better heat dispersion efficacy, and a fan body can be fixed at the heat sink directly in virtue of the bushing construction.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: May 30, 2000
    Inventor: Wen-Hao Chuang
  • Patent number: 6057627
    Abstract: A claw pole generator has a drive shaft, two pole wheel halves arranged on the drive shaft and each having a disk-shaped plate and claw shaped magnet poles spaced from one another in a peripheral direction and having magnet pole tips, the magnet poles of one pole wheel half being inserted in intermediate spaces of the magnet poles of the other of the pole wheel halves, permanent magnet parts provided for a dissipation flux compensation and arranged in intermediate spaces of the plate, the magnet poles extending in a predetermined direction, and a mounting device connecting the magnet pole tips with a neighboring one of the plates, the magnet poles extending toward an outer edge of a neighboring one of the plates, the mounting device having vanes operating as an ventilation element.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: May 2, 2000
    Assignee: Robert Bosch GmbH
    Inventor: Istvan Ragaly
  • Patent number: 6031306
    Abstract: In an electric motor which includes an electronic control device and an armature within a closed motor casing, the electronic control device is arranged within the casing, in a position offset axially from but close to the armature. The motor includes a thermal screen which is interposed axially between the armature and the control device, and the screen includes means for dissipating heat outside the casing.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: February 29, 2000
    Assignee: Valeo Electronique
    Inventor: Alfred Permuy
  • Patent number: 6023113
    Abstract: An anti-electrostatic property between an impeller and a lead wire is improved particularly in a case of a miniature axial flow fan motor. In an axial flow fan motor, an impeller (6) integral with a motor yoke (12) is provided on a shaft (5) rotatably supported by bearings (2,3). An end face of the motor yoke (12) confronted with a PC board (8) mounting a drive circuit and its component parts thereon is covered by resin (P). Resin covering this portion suppresses the generation of the electrostatic current at this portion.
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: February 8, 2000
    Assignee: Minebea Co., Ltd.
    Inventor: Shuichi Otsuka
  • Patent number: 6023112
    Abstract: In an alternating current generator and fans thereof in accordance with the invention, the cooling efficiency of the alternating current is improved by fans fixed to a rotor. When the fans are formed during a press working operation, the blades are formed directly from the fans by cut-raising the fans toward a bracket side to form blades and simultaneously cut-raising protruding portions toward a rotor side to form protrusions. This design allows for both improvement in cooling efficiency of the alternating current generator and ease of manufacture of the fans.
    Type: Grant
    Filed: May 20, 1996
    Date of Patent: February 8, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Yoshihito Asao
  • Patent number: 6011331
    Abstract: An improved design for a switched reluctance motor is disclosed that keeps the motor cool during operation and thereby improves the performance and reliability of the motor. The improved design employs three centrifugal fans mounted to the motor shaft, which are used to create two independent airflow paths, one of which cools the electronic components of the motor. The improved design also divides the functions performed by a single printed circuit board into two circuit boards, an upper circuit board and a lower circuit board. Another feature of the improved design includes locating the position/speed sensing encoder immediately below one of the centrifugal cooling fans. The disclosed construction provides for increased dissipation of heat that is generated by the motor and its electronic components. In this configuration, the printed circuit boards and other electronic components are located in such a manner that air can be circulated in a path to remove heat from these components.
    Type: Grant
    Filed: April 22, 1997
    Date of Patent: January 4, 2000
    Assignee: Emerson Electric Co.
    Inventors: Joseph T. Gierer, Karmen D. Cox
  • Patent number: 6011343
    Abstract: In a rotor of a rotary machine having a plurality of claw poles extending in the axial direction of the rotor alternately from opposite ends and a plurality of auxiliary permanent magnets held between adjacent two of said claw poles, each of the claw poles has trapezoidal outer and inner peripheries with the sides thereof forming parallelopiped rectangular spaces between adjacent claw poles. The permanent magnet members are fitted to the spaces so that the side walls of the magnet members extend to the inside of the claw poles to function as an axial flow fan.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: January 4, 2000
    Assignee: Denso Corporation
    Inventor: Makoto Taniguchi
  • Patent number: 6008555
    Abstract: An electric motor includes a stator assembly having an annular stator core with an inner diameter and an outer diameter. The inner diameter is formed with a plurality of winding slots extending from a first end of the stator core to a second end of the stator core. A plurality of windings are disposed within the winding slots beginning with a first slots. The windings are coupled into at least one winding group associated with at least a first phase, and each winding has a first winding end and a second winding end extending from the first end and the second end, respectively, of the stator core. At least one thermal fuse is disposed in thermal contact with the first winding end and substantially adjacent to the first winding portion.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: December 28, 1999
    Inventors: Keith E. Garr, Larry J. Kintz, Jr., Denise L. LoFasto, Alida I. Santana, Wilfredo E. Colon, Ricardo Jusino
  • Patent number: 5994804
    Abstract: The hydraulic components of a cooling circuit for a dynamoelectric machine are eliminated in a totally air cooled dynamoelectric machine which includes a rotor (12) rotatable about an axis (14) and including a central stack (20) of ferrous laminations (22) defining a plurality of radially outwardly directed circumferentially spaced poles (132), spaced shaft ends (24,26) on the axis (14) and extending from opposite sides of the stack (20) and a first air passage (46) in the stack (20). Magnetic journal bearings (54,56) and a magnetic thrust bearing (58,60) are provided for the shaft segments (24,26) and impellers (62) are located on opposite sides of the stack (20). A stator (16) surrounds the rotor (12) and includes windings (76) connected by end turns (94) located exteriorally of the stator (16).
    Type: Grant
    Filed: December 7, 1998
    Date of Patent: November 30, 1999
    Assignee: Sundstrand Corporation
    Inventors: Robert Grennan, William Greenlee, David Halsey, W. Glen Smith
  • Patent number: 5986363
    Abstract: A motor-driven tool is provided with a grip on which a switch is placed, and the grip is coupled to the middle of a cylindrical housing which houses a motor in its rear end and a motor output decelerator in front of the motor in its front end. A deceleration rotation output shaft is provided in the front of the housing. The motor houses an axial flow fan for air intake in the rear and a centrifugal fan for exhaust in the front and has intake air openings in the rear side and an exhaust air opening in a front side surface. The cylindrical housing also has an intake opening that connects to the intake air opening in the rear side of the motor and an exhaust opening that connects to the motor exhaust air opening at the position where the front of the motor is located.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: November 16, 1999
    Assignee: Matsushita Electric Works Ltd.
    Inventors: Yosuke Ishida, Natsuhara Tsutomu
  • Patent number: 5982071
    Abstract: An electrical machine has a stator, and a rotor defining an axis of rotation, the stator including laminations located along that axis, the laminations having protrusions, the protrusions on each lamination being circularly spaced apart about the axis to define cooling air flow passages, and a fan mounted on the rotor to effect flow of cooling air into and through such passages as the rotor rotates.
    Type: Grant
    Filed: August 13, 1998
    Date of Patent: November 9, 1999
    Assignee: Able Corporation
    Inventor: Stephen D. Ehrick