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WO1993015926A1 - Systeme de transmission electrique pour voiture d'enfant - Google Patents

Systeme de transmission electrique pour voiture d'enfant Download PDF

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Publication number
WO1993015926A1
WO1993015926A1 PCT/US1993/001136 US9301136W WO9315926A1 WO 1993015926 A1 WO1993015926 A1 WO 1993015926A1 US 9301136 W US9301136 W US 9301136W WO 9315926 A1 WO9315926 A1 WO 9315926A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
drive motors
battery
child
ridable
Prior art date
Application number
PCT/US1993/001136
Other languages
English (en)
Inventor
Timothy S. Harris
Original Assignee
Kransco
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kransco filed Critical Kransco
Publication of WO1993015926A1 publication Critical patent/WO1993015926A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2036—Electric differentials, e.g. for supporting steering vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/52—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by DC-motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/20—Vehicles specially adapted for children, e.g. toy vehicles
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Definitions

  • the invention relates generally to a power drive train for an electric child's ridable vehicle, and more particularly to an improved drive system for providing multiple speeds and a selectably engageable differential in such electric vehicles.
  • 4,639,646 includes two rechargeable batteries, two drive motors, one on each rear drive wheel, an on-off switch and a forward- reverse selector. Two-speed operation is provided by selectively connecting the two batteries in either series or parallel. In series, the batteries supply "full" voltage to the drive system. In parallel, the batteries supply "half voltage to the drive system. Thus, the vehicle can be operated at either "high" speed or "low” speed.
  • the prior art electric drive system used in Patent No. 4,639,646 is an effective way to produce multiple speeds in toy vehicles without the use of energy-wasting variable resistors or expensive pulse-width-modulation speed controllers.
  • an electric drive system for a child's ridable vehicle which uses a single battery, but which allows for two- speed operation of the vehicle by selecting between alternate wiring configurations of other discreet elements in the drive system, namely, the drive motors.
  • a single battery is less expensive to produce and replace than multiple batteries, and requires less wiring.
  • multiple batteries were generally necessary to provide economical two-speed operation.
  • An electric drive system with a differential effect is provided for a child's ridable vehicle.
  • the system is preferably used on a vehicle of the type having two direct-current drive motors for propelling the vehicle, one for imparting rotational motion to a driven wheel on each side of the vehicle.
  • At least one pivotable nondriven wheel is also provided on the vehicle for steering.
  • the elements of the drive system comprise a battery power supply for producing a battery voltage to energize the vehicle drive motors, a series connection between the two drive motors of the vehicle, causing current to pass through both drive motors in series, and an operative connection between the battery power supply and the series-connected drive motors.
  • the operative connection between the battery and motors applies the battery voltage across the two series-connected drive motors, producing a voltage drop across each drive motor, when the vehicle is in motion, generally in proportion to the speed of the respective drive motor.
  • the result is a differential effect which permits the drive motors to operate at differential speeds when the vehicle turns a corner, while each motor draws the same current.
  • the electric drive system for a child's ridable vehicle also provides for speed selectivity on vehicles which carry only a single battery.
  • Speed selectivity is provided using a battery which develops a predetermined voltage at a pair of battery terminals.
  • Two direct-current drive motors one operatively connected to a driven wheel on each side of the vehicle, are energized by the battery.
  • a motor interconnect selector operatively connects the drive motors in series across the battery terminals for low-speed operation, and connects the drive motors in parallel across the battery terminals for high ⁇ speed operation.
  • the speed selection system for the vehicle includes the following basic elements: (1) a first wiring configuration for low-speed operation in which the drive motors are operatively connected to one another in series, (2) a second wiring configuration for high-speed operation in which the drive motors are operatively connected to one another in parallel, and (3) a selector for switching between the first and second wiring configurations to change the speed of the drive motors.
  • the drive system employs a single solid-gel rechargeable battery with a nominal battery voltage of 18-volts.
  • the vehicle has a maximum speed of less than 8-miles-per-hour when in the high-speed > wiring configuration and a maximum speed of less than 4-miles-per-hour when in the low-speed wiring configuration.
  • FIG. 1 is a partial, schematic, perspective view of a child's ridable vehicle shown in phantom, with the major parts of the vehicle's wiring, incorporating the electric drive system of the present invention, shown with solid lines.
  • Fig. 2 is a partially schematic circuit diagram showing the major elements of the vehicle wiring of Fig. 1, including the speed selection system and the system for providing a differential effect in accordance with the present invention.
  • a child's ridable toy electric vehicle 10 is shown in phantom. Certain parts of vehicle 10, such as the seats, trunk lid, battery housing, and other elements unnecessary to the explanation of the present invention, have been deleted from the phantom image to more clearly show the key parts of the vehicle drive system 12.
  • the vehicle drive system includes the electrical devices and wiring harness used to transmit power from the vehicle's battery power supply 14 to a pair of direct-current drive motors 16, 18 which impart motion to the vehicle.
  • the other parts of the drive system include the wiring between battery 14 and motors 16, 18, a forward-reverse selector switch 20, an on-off switch 21 mounted on the floorboard in the driver's position covered by a simulated gas pedal 22, and a high-low speed selector switch 24 mounted on the dashboard or at another convenient location on the vehicle.
  • Numerous other devices may also be coupled to the electrical system of the vehicle, including a horn, headlights, a speed selector and other accessories.
  • the vehicle illustrated in Fig. 1 includes only the basic elements necessary to fully describe the drive system of the present invention.
  • Vehicle 10 is a toy electric vehicle designed to be ridden in by one or two children. It has four wheels, only two of which are shown in the phantom image of Fig.
  • FIG. 1 illustrates the right side of the vehicle.
  • the left side of vehicle 10 is a mirror image of that shown in Fig. 1.
  • Right side rear wheel 30 is a driven wheel, rotationally driven by drive motor 16.
  • the mechanical connection between the right drive motor 16 and the right rear driven wheel 30 is shown in Fig. 1 as a connecting shaft 31 between the motor and the wheel hub.
  • motor 16 can be mechanically coupled to driven wheel 30 by any other type of suitable mechanical linkage, such as a belt or chain transmission or the like.
  • the left side wheel 33 (partially shown in Fig. 1), on the opposite side of the vehicle from wheel 30, is rotationally driven by drive motor 18 in the same manner (not shown) as wheel 30.
  • one of the motors 16, 18 imparts rotational motion to a driven wheel on each side of the vehicle.
  • the front wheels of vehicle 10 are not operatively coupled to drive motors and are referred to as nondriven wheels.
  • the forward right side nondriven wheel 32 is visible in Fig. 1.
  • An identical forward left side nondriven wheel (not shown) is provided on the left side of vehicle 10.
  • the nondriven front wheels are pivotable for steering vehicle 10.
  • the front nondriven wheels are mounted on kingpins, or another suitable type of pivotable mount, and a conventional steering linkage is provided between steering wheel 34 and the front pivotable wheels.
  • the details of the steering mechanism are not shown in Fig. 1, since such systems are well known.
  • a suitable steering system for pivoting the front wheels of vehicle 10, including kingpins for the front wheels and linkages between the steering wheel and the wheel pivots, is shown in Figs. 2-4 of U.S. Patent No. 4,709,958, the disclosure of which is incorporated herein by reference.
  • Battery 14 is the power supply for vehicle 10, providing energy to operate the vehicle.
  • the battery develops a predetermined voltage, called the battery voltage, at a pair of battery terminals 40, 42.
  • Battery 14 is preferably a solid-gel rechargeable battery with a nominal predetermined voltage of 18-volts between terminals 40, 42.
  • the vehicle shown in Fig. 1 is a toy version of a rear-engine car, such as a Porsche. Consequently, battery 14 is installed in the trunk of the vehicle and would typically be covered by a housing which resembles or simulates an automotive engine.
  • Battery 14 is coupled through a two-wire connector plug 45 to the remainder of the wiring harness of vehicle 10.
  • Connector plug 45 is shown in Fig. 2 separated into two halves, 45a and 45b, representing the negative and positive leads of the vehicle wiring.
  • Respective negative and positive battery connector wires 48, 49 operatively connect battery 14 to the remainder of the drive system through connectors 45a, 45b, respectively.
  • Connector plug 45 allows quick disconnection of battery 14 from the remainder of the wiring harness and allows an external charger to be connected to the battery for recharging.
  • a pair of wiring harness connector wires 50, 52 extend between battery connector 45 and forward-reverse switch 20, which is preferably mounted near the driver's position.
  • a switch arm 44 which simulates a gear shift lever, operates switch 20.
  • Forward-reverse switch 20 is a conventional double-pole double-throw switch which passes battery voltage from input wires 50, 52 to output wires 56, 58 in either standard or reverse polarity.
  • Battery voltage on lines 50, 52 is carried to input terminals 60, 62, respectively of switch 20.
  • the switch contacts are in the configuration shown in Fig. 2 (the forward position)
  • a direct connection is made between input terminals 60, 62 and the respective output terminals 64, 66, and the polarity of switch output lines 56, 58 is the same as input lines 50, 52.
  • switch 20 is placed in the reverse position, input terminals 60, 62 are connected to reverse terminals 68, 70, respectively.
  • the polarity of the voltage across output lines 56, 58 is the reverse of the polarity on input lines 50, 52, respectively.
  • Switch 20 determines the rotational direction of motors 16, 18 and the direction of vehicle operation.
  • Switch 21 is preferably a double-pole switch biased into the open position shown schematically in Fig. 2.
  • the switch is operated by the driver stepping on a simulated gas pedal 22, which closes the contact between switch terminals 82, 84 to supply battery power to motors 16, 18.
  • Stepping on pedal 22 also breaks or opens the connection between secondary switch terminals 84 and 86, the latter being connected to a dynamic brake resistor 90.
  • gas pedal 22 is released, the connection between terminals 82, 84 is opened and the connection between terminals 84 and 86 is closed.
  • motors 16, 18 act as generates, producing a current which is dissipated in heat by dynamic brake shunt resistor 90. The result is dynamic braking which helps slow the vehicle.
  • An important feature of the electric drive system of the present invention is the selective motor interconnection system provided by high-low switch 24.
  • Switch 24 determines how the battery voltage available on motor input lines 58 and 92 is applied to motors 16, 18.
  • Two motor wiring configurations are provided by switch 24, which is a double-pole double-throw switch like forward-reverse switch 20.
  • the first wiring configuration between motors 16 and 18, for low-speed operation of the vehicle, is a series connection between the motors.
  • a second wiring configuration, for high-speed operation of motors 16, 18, is provided when switch 24 is repositioned to the position shown in Fig. 2.
  • switch 24 connects terminal 96 with terminal 104 and connects terminal 98 with terminal 106.
  • terminal 96 is disconnected from terminal 100 and terminal 98 is disconnected from terminal 102.
  • the result is a parallel connection between motors 16, 18, in which the full battery voltage between lines 92 and 58 is applied across each drive motor.
  • the higher motor speed resulting from this second motor wiring configuration is due to the higher voltage applied to the motors.
  • Selector switch 24 is a toggle or rocker switch mounted on the dashboard of the vehicle. Switch 24 could also be combined with or positioned in close proximity to forward-reverse switch 20.
  • a vehicle wired in accordance with Fig. 2 can be operated in either the forward or reverse direction at either the high or low speed.
  • a mechanical or electrical interlock (not shown) is provided to disable high-speed operation of the vehicle when switch 20 is in the reverse position. That would prevent a child from operating the vehicle in reverse at high speed, which could be dangerous.
  • One suitable means for providing an interlock to prevent high ⁇ speed reverse operation would be to install a cut-out switch on branch line 120 (not shown) which is mechanically tied to forward-reverse switch 20 and opens whenever switch 20 is placed in the reverse position.
  • the inside (slower) motor sometimes will draw 11- amps or 12-amps or more, in an attempt to keep up with the outside motor, substantially increasing the total current drawn from battery 14 beyond the 16- amp norm for high-speed operation.
  • the total current drawn from the battery remains generally equal to 8-amps, regardless of whether the vehicle is turning a corner or going straight.
  • the present invention provides an electric drive system with a differential effect which is usable on any child's ridable vehicle of the type which has two direct-current drive motors, one of which imparts rotational motion to a driven wheel on each side of the vehicle.
  • the low-speed series- connected motor configuration helps prolong battery life and increases the recharging interval by reducing current demand from the battery, particularly when the vehicle is frequently driven around corners. It may even be desirable to eliminate the optional high-speed configuration and provide a child's ridable vehicle with only series-connected drive motors.
  • a protective device accessible only with tools not generally usable by children can be installed to disable the high-speed operation of the vehicle until a child is familiar enough with its operation to operate it at high speed.
  • switch 24 can be omitted entirely from the circuitry of the drive system.
  • motors 16, 18 could be permanently joined together in series by connecting a wire 122 between terminal 114 of motor 16 and terminal 116 of motor 18 (as shown with dashed lines in Fig. 2).
  • Such an alternative vehicle drive system would always operate with a differential effect.
  • the invention provides an electric drive system for a child's ridable vehicle of the type which employs a battery power supply and two electric drive motors for imparting motion to the vehicle.
  • the invention allows for two-speed operation of the vehicle through selective connection of the motors to the battery power supply in either a series or parallel configuration.
  • the electric drive system and speed selection system is suitable for use on children's electric vehicles which operate at a maximum speed of 8-miles-per- hour in the high-speed configuration and at a maximum speed of 4-miles-per- hour in the low-speed configuration.
  • the actual speed of operation for vehicle 10 is preferably 6-miles-per-hour at high-speed and 3-miles-per-hour at low- speed.
  • the system also provides a differential effect on any child's ridable vehicle which has two drive motors, one of which imparts rotational motion to a driven wheel on each side of the vehicle, the differential effect resulting when the drive motors are wired in series.
  • the invention is particularly applicable to toy ride-on vehicles with simple controls which allow for two- speed operation.
  • the present invention provides a drive system for a child's ridable vehicle which can provide two-speed operation without the need for two batteries on the vehicle. Instead, two-speed operation is provided by switching between series and parallel motor connections. Moreover, the drive system provides a differential effect when the motors are connected in series, which prolongs battery life and lengthens each charging cycle by reducing the current demands on the battery.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

L'invention décrit un système de transmission électrique (12) conçue pour une voiture d'enfant (10) d'un type utilisant une alimentation par batterie (14) et deux moteurs à transmission électrique (16, 18) servant à mettre ledit véhicule en mouvement. Un des deux moteurs de transmission (16, 18) transmet une rotation à une roue motrice de chaque côté du véhicule (10). Un commutateur de sélection (24) permet à l'utilisateur de modifier la configuration de branchement des moteurs de transmission (16, 18) entre un branchement moteur-parallèle permettant un fonctionnement à vitesse élevée et un branchement moteur-série servant à un fonctionnement à vitesse lente. Dans la configuration moteur-série à vitesse lente, le système de transmission (12) produit un effet différentiel, ce qui permet aux moteurs (16, 18) de fonctionner à des vitesses différentes quand le véhicule (10) effectue un tournant, ce qui prolonge sensiblement la durée de vie de la batterie.
PCT/US1993/001136 1992-02-10 1993-02-09 Systeme de transmission electrique pour voiture d'enfant WO1993015926A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US83398092A 1992-02-10 1992-02-10
US07/833,980 1992-02-10

Publications (1)

Publication Number Publication Date
WO1993015926A1 true WO1993015926A1 (fr) 1993-08-19

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ID=25265800

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/001136 WO1993015926A1 (fr) 1992-02-10 1993-02-09 Systeme de transmission electrique pour voiture d'enfant

Country Status (1)

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WO (1) WO1993015926A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996017364A1 (fr) * 1994-11-28 1996-06-06 Mattel, Inc. Commutateur electrique a plusieurs positions
EP0917980A1 (fr) * 1997-11-21 1999-05-26 Signal Lux Italia S.p.A. Dispositif de commande pour moteurs dans véhicules-jouets
EP1022104A1 (fr) * 1999-01-25 2000-07-26 Sealed Air S.p.A. Dispositif mobile pour dispenser des mousses
ES2161636A1 (es) * 1999-12-24 2001-12-01 Rodriguez Martinez S C Sistema diferencial para vehiculos infantiles.
US6422330B1 (en) 1999-10-04 2002-07-23 Pic Switches, Inc. Switch for use in ride-on vehicles for children
EP1195317A3 (fr) * 2000-10-06 2003-08-06 Rodriguez Martinez, S.C. Véhicule pour enfants
EP1324808A4 (fr) * 2000-09-18 2006-10-25 Mattel Inc Vehicule pour enfants
US9980434B1 (en) 2015-02-28 2018-05-29 Hydro-Gear Limited Partnership Network for placing a plurality of lawnmower components in operative communication
US10058031B1 (en) 2015-02-28 2018-08-28 Hydro-Gear Limited Partnership Lawn tractor with electronic drive and control system
WO2018185059A1 (fr) 2017-04-03 2018-10-11 AccuPower Forschungs-, Entwicklungs- und Vertriebsgesellschaft mbH Ensemble en cascade servant à brancher une multitude d'accumulateurs d'énergie, branchement associé et procédé servant à commander une alimentation en énergie comprenant ledit ensemble

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2581551A (en) * 1948-04-14 1952-01-08 George M Myrmirides Means for powering vehicles
US3866703A (en) * 1972-07-26 1975-02-18 K G Engineering Lab Limited Electric drive transmission systems
US4227737A (en) * 1978-11-13 1980-10-14 Vogt Calvin R Automotive trunk deck lid accessory
US4378855A (en) * 1979-08-20 1983-04-05 Tennant Company Multi-speed drive with forward/reverse lockout
US4476949A (en) * 1982-04-29 1984-10-16 Patton Albert L Motorized wheelchair and means for steering the same
US4570739A (en) * 1983-09-29 1986-02-18 Burke, Inc. Personal mobility vehicle
US4716980A (en) * 1986-02-14 1988-01-05 The Prime Mover Company Control system for rider vehicles

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2581551A (en) * 1948-04-14 1952-01-08 George M Myrmirides Means for powering vehicles
US3866703A (en) * 1972-07-26 1975-02-18 K G Engineering Lab Limited Electric drive transmission systems
US4227737A (en) * 1978-11-13 1980-10-14 Vogt Calvin R Automotive trunk deck lid accessory
US4378855A (en) * 1979-08-20 1983-04-05 Tennant Company Multi-speed drive with forward/reverse lockout
US4476949A (en) * 1982-04-29 1984-10-16 Patton Albert L Motorized wheelchair and means for steering the same
US4570739A (en) * 1983-09-29 1986-02-18 Burke, Inc. Personal mobility vehicle
US4570739B1 (en) * 1983-09-29 1994-04-19 Burke Inc Personal mobility vehicle
US4716980A (en) * 1986-02-14 1988-01-05 The Prime Mover Company Control system for rider vehicles

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996017364A1 (fr) * 1994-11-28 1996-06-06 Mattel, Inc. Commutateur electrique a plusieurs positions
US5571999A (en) * 1994-11-28 1996-11-05 Mattel, Inc. Multi-position electrical switch
AU682794B2 (en) * 1994-11-28 1997-10-16 Mattel, Inc. Multi-position electrical switch
EP0917980A1 (fr) * 1997-11-21 1999-05-26 Signal Lux Italia S.p.A. Dispositif de commande pour moteurs dans véhicules-jouets
EP1022104A1 (fr) * 1999-01-25 2000-07-26 Sealed Air S.p.A. Dispositif mobile pour dispenser des mousses
US6422330B1 (en) 1999-10-04 2002-07-23 Pic Switches, Inc. Switch for use in ride-on vehicles for children
ES2161636A1 (es) * 1999-12-24 2001-12-01 Rodriguez Martinez S C Sistema diferencial para vehiculos infantiles.
EP1110803A3 (fr) * 1999-12-24 2003-02-26 Rodriguez Martinez, S.C. Système d'engrenage différentiel pour véhicule
EP1324808A4 (fr) * 2000-09-18 2006-10-25 Mattel Inc Vehicule pour enfants
EP1195317A3 (fr) * 2000-10-06 2003-08-06 Rodriguez Martinez, S.C. Véhicule pour enfants
US9980434B1 (en) 2015-02-28 2018-05-29 Hydro-Gear Limited Partnership Network for placing a plurality of lawnmower components in operative communication
US10058031B1 (en) 2015-02-28 2018-08-28 Hydro-Gear Limited Partnership Lawn tractor with electronic drive and control system
US12114607B1 (en) 2015-02-28 2024-10-15 Hydro-Gear Limited Partnership Lawn tractor with electronic drive and control system
WO2018185059A1 (fr) 2017-04-03 2018-10-11 AccuPower Forschungs-, Entwicklungs- und Vertriebsgesellschaft mbH Ensemble en cascade servant à brancher une multitude d'accumulateurs d'énergie, branchement associé et procédé servant à commander une alimentation en énergie comprenant ledit ensemble

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