GB2244684A - Electric four wheel drive wheelchair - Google Patents

Electric four wheel drive wheelchair Download PDF

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Publication number
GB2244684A
GB2244684A GB9012646A GB9012646A GB2244684A GB 2244684 A GB2244684 A GB 2244684A GB 9012646 A GB9012646 A GB 9012646A GB 9012646 A GB9012646 A GB 9012646A GB 2244684 A GB2244684 A GB 2244684A
Authority
GB
United Kingdom
Prior art keywords
wheelchair
indoor
childs
battery powered
powered electric
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9012646A
Other versions
GB9012646D0 (en
Inventor
Keith Richard Bound
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9012646A priority Critical patent/GB2244684A/en
Publication of GB9012646D0 publication Critical patent/GB9012646D0/en
Priority to PCT/GB1991/000910 priority patent/WO1991018577A1/en
Priority to AU79538/91A priority patent/AU7953891A/en
Publication of GB2244684A publication Critical patent/GB2244684A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
    • A61G5/041—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven having a specific drive-type
    • A61G5/046—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven having a specific drive-type at least three driven wheels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1051—Arrangements for steering
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/12—Rests specially adapted therefor, e.g. for the head or the feet
    • A61G5/125—Rests specially adapted therefor, e.g. for the head or the feet for arms
    • 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
    • B60L50/51—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D7/00—Steering linkage; Stub axles or their mountings
    • B62D7/06—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins
    • B62D7/14—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering
    • B62D7/15—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering characterised by means varying the ratio between the steering angles of the steered wheels
    • B62D7/1509—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering characterised by means varying the ratio between the steering angles of the steered wheels with different steering modes, e.g. crab-steering, or steering specially adapted for reversing of the vehicle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G2203/00—General characteristics of devices
    • A61G2203/10—General characteristics of devices characterised by specific control means, e.g. for adjustment or steering
    • A61G2203/14—Joysticks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2300/00—Indexing codes relating to the type of vehicle
    • B60G2300/24—Wheelchairs
    • 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
    • B60L2200/34—Wheel chairs
    • 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
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/40—Electrical machine applications
    • B60L2220/42—Electrical machine applications with use of more than one 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
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/40—Electrical machine applications
    • B60L2220/44—Wheel Hub motors, i.e. integrated in the wheel hub
    • 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
    • B60L2250/00—Driver interactions
    • B60L2250/16—Driver interactions by display
    • 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
    • B60L2260/00—Operating Modes
    • B60L2260/20—Drive modes; Transition between modes
    • B60L2260/28—Four wheel or all wheel drive
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Carriages For Children, Sleds, And Other Hand-Operated Vehicles (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Handcart (AREA)

Abstract

An indoor/outdoor battery powered electric childs wheelchair. The wheelchair has four wheel drive, steering, braking and independent suspension. Powered by two twelve volt 24 amp batteries the wheelchair is operated by a joystick control knob and five control buttons with a visual L.C.D. screen display unit. The control panel buttons, L.C.D. screen and joystick control knob are linked up to an electronic control box which is programmed to make the wheelchair manoeuvre in a variety of positions as disclosed in Figure 1-14 (not shown).

Description

INDOOR/OUTDOOR BATTERY POWERED ELECTRIC CHILDS WHEELCHAIR This invention relates to an indoor/outdoor battery powered electric childs wheelchair.
Battery powered electric wheelchairs are built on a rigid frame which consists of a seat and four wheels.
The rear or front pair of wheels can be motorised while the remaining two are castors.
Unless these wheelchairs are driven over smooth, flat surfaces they can become unstable and dangerous for the occupant.
With only two wheels propelling and steering, the vehicle loses half of its power and all of its steering if one of the motorized wheels are off the ground.
The occupant can also lose control if they are crossing a slope because the weight of the chair and its occupant turn the castors in the direction of the slope causing the chair to be deflected from the selected direction.
Another way the vehicle can be deflected is if a castor hits an obstacle or rough terrain.
As the centre of gravity has not been taken into account in the design of the vehicle it becomes unstable when engaging a slope or going down a 1 in 4 gradient. If the occupant brakes, a lose of control can occur, throwing them from the wheelchair, which could cause serious injury.
According to the present invention there is provided an indoor/outdoor battery powered electric childs wheelchair comprising a four wheel drive, steering and braking system with independent suspension. The four driven wheels are located at each corner of the platform/rotational moulded base, and have a motor and gearbox enclosed in each wheel.
Above each wheel there is a similar motor and gearbox which steers the vehicle. Inside each gearbox there is a solenoid which acts as a brake once the joystick control knob is released.
The suspension consists of two steel strips, each attached on either side of the platform/rotational moulded base above the steering motors, which acts as a spring to each wheel.
To move the wheelchair in a variety of directions the occupant has a control panel which comprises of an L.C.D. display screen, five buttons and a joystick control knob. The control buttons include an on/off switch, speed selector slow 2 m.p.h./fast 4 m.p.h., and three drive mode buttons so that the wheelchair not only has four wheel drive but can also drive on the front two wheels, the two at the rear and all four wheels can be positioned so that the wheelchair moves sideways.
All eight motors are connected to an electronic controller which is programmed, using micro chips, so that the vehicle can make certain movements, all of which are indicated in Figure 1-14.
It is powered by two 12 volt 24 amp batteries.
The invention will now be described by way of reference to the accompanying drawings in which: Figure 1: Shows inside elevation and plan view the joystick control knob 1 and the directions in which the wheelchair can manoeuvre by selecting a certain position of the joystick knob 1. The base of the joystick control unit la contains the mechanical and electronic components which are connected to the electronic controller. The joystick control knob 1 is in a neutral position which means that the wheelchair is stationary and the brakes are activated.
Figure 2: Shows in plan the platform/rotational moulded base 5 t the four drive wheels 3, the electronic controller 4 and the four steering motors 2.
Figure 3: In plan view, illustrates the joystick control knob in a forward position 1 which moves the wheelchair forwards as indicated by the arrows.
Figure 4: In plan view, shows the joystick control knob in the reverse position 1, therefore the wheelchair will move backwards as indicated by the arrows.
Figure 5: In plan view, illustrates the joystick control knob in a south/east position 1. The two drive wheels on the left hand side are at 450 to the vertical while the two on the right are at 900 to the vertical. The wheelchair will move in an anti clockwise direction 6. The centre of the turning circle is Figure 6: In plan view, shows the joystick control knob in the north/east position 1. The two drive wheels on the left hand side are at 450 to the vertical while the two wheels on the right side are at 900 to the vertical. The wheelchair will move in a clockwise direction 8, while the centre of the turning circle is Figure 7: In plan view, illustrates the joystick control knob in the north/west position 1. The two drive wheels on the right hand side are at 450 to the vertical while the two on the left are 900 to the vertical.
The wheelchair will move in an anti-clockwise direction 9, while the centre of the turning circle is 7.
Figure 8: In plan view, shows the joystick control knob in a south/west position 1. The two drive wheels on the left hand side are at 900 to the vertical while the two on the right are at 450 to the vertical. The wheelchair will move in a clockwise direction 10, the centre of the turning circle is 7.
Figure 9: In plan view, shows the control panel. The joystick control knob 1, is in a neutral position and there are five control buttons numbered 11-15 Button 11 will switch the power on or off and, button 12 is the speed selector, slow or fast. In addition to the wheelchair having four wheel driveit also has three other drive modes. Button 13 all the wheels en gage a 900 position to the vertical so that the wheelchair can only move in the direction of East or West when using the joystick control knob for the two front wheel driving only 14 and for the two rear wheels driving only 15.
Figure 10: In plan view, illustrates what happens to the four drive wheels when control button 13 is pressed.
All the wheels are at 900 to the vertical and can only move East or West and because the joystick control knob is in the west position the wheelchair moves to the west.
Figure 11: In plan view, shows the vehicle moving to the East.
Again the control button 13 must be pressed first and the wheels will engage a 900 position to the vertical.
Figure 12: In plan view, when control button 14 is pressed, only the two front wheels are driven.
Figure 13: In plan view, when control button 15 is pressed, only the two rear wheels are driven.
Figure 14: In plan view, illustrates, on the left hand side of the diagram, the joystick knob is in the East position 1. All wheels are at 450 to the vertical, therefore the wheelchair will move in a clockwise direction 8 and will turn a complete circle on its own axis 7.
The right side diagram shows the joystick in the West position which means the wheelchair will move in an anti-clockwise direction 10 and will turn a complete circle on its own axis 7. Again all wheels are at 450 to the vertical.
Figure 15: Inside elevation illustrates the wheelchair without the platform 1 rotational moulded base.
The steel strip 16 which runs either side of the vehicle and is attached to the platform/rotational moulded base 18.
The steering motors and gearboxes 2 are positioned under the steel strip 16 SO that if the wheelchair is driving over uneven ground the wheels will be able to move up and down giving the wheelchair suspension. The drive wheels and steering motors are linked via a steel tube 17, which is connected to the axle at the centre of the wheel.
Figure 16: Illustrates a front and 2 side sectional views of the drive wheels showing the motor 18 and gearbox 19. The motor is positioned 240 33' from the vertical. The gearbox 19 and gears 20 are zinc die cast while the small worm wheel 21 is rolled.
Figure 17: A flow chart illustrating how to operate the wheelchair.
Figure 18: Illustrates two perspective drawings of the childs wheelchair showing the platform a plastic rotational moulding 5, the four drive wheels 3, the joystick control unit 22, including the joystick knob 1, five control buttons 11-15 and the L.C.D.
screen unit 23.

Claims (14)

1. According to the present invention there is provided an indoor/outdoor battery powered electric childs wheelchair comprising a four wheel drive, steering and braking system with independent suspension. The four driven wheels are located at each corner of the platform/rotational moulded base, and have a motor and gearbox enclosed in each wheel.
Above each wheel there is a similar motor and gearbox which steers the vehicle. Inside each gearbox there is a solenoid which acts as a brake once the joystick control knob is released.
The suspensions consists of two steel strips, each attached on either side of the platform/rotational moulded base above the steering motors, which acts as a spring to each wheel.
To move the wheelchair in a variety of directions the occupant has a control panel which comprises of an L.C.D. display screen, five buttons and a joystick control knob. The control buttons include an on/off switch, speed selector slow 2 m.p.h./fast 4 m.p.h., and three drive mode buttons so that the wheelchair not only has four wheel drive but can also drive on the front two wheels, the two at the rear and all four wheels can be positioned so that the wheelchair moves sideways.
All eight motors are connected to an electronic controller which programmed using micro chips so that the vehicle can make certain movements all of which are indicated in Figure 1-14. It is powered by two 12 volt 24 amp batteries.
2. An indoor/outdoor battery powered electric childs wheelchair as claimed in claim 1. The wheelchair has four wheel drive.
3. An indoor/outdoor battery powered electric childs wheelchair as claimed in claim 1. The wheelchair has four wheel steering.
4. An indoor/outdoor battery powered electric childs wheelchair as claimed in claim 1. The wheelchair has four wheel braking.
5. An indoor/outdoor battery powered electric childs wheelchair as claimed in claim 1. The wheelchair has independent suspension.
6. An indoor/outdoor battery powered electric childs wheelchair as claimed in claim 1 and claim 3. With the wheelchair having four wheel steering it is able to drive in a complete circle on its own axis as shown in Fig.14.
7. An indoor/outdoor battery powered electric childs wheelchair as claimed in claim 1 the wheelchair has three drive mode control buttons so that the wheelchair can drive on the front two wheels, the rear two wheels or all four wheels can be positioned so that the wheelchair moves sideways.
8. An indoor/outdoor battery powered electric childs wheelchair as claimed in claim 1. The wheelchair has a two speed selector control button. The slow speed 2 m.p.h. is used for indoor use, while the fast speed 4 m.p.h. max is used for outdoor use.
9. An indoor/outdoor battery powered electric childs wheelchair as claimed in claim 1. The control panel includes an L.C.D.
screen for fault finding, low battery power, driving mode and speed indicator.
10. An indoor/outdoor battery powered electric childs wheelchair as claimed in claim 1. The movement of the wheelchair, drive wheels, steering motors, braking and joystick control unit is made by using an electronic control unit which is programmed by using micro-chips.
:
11. An indoor/outdoor battery powered electric childs wheelchair as claimed in claim 1. The movement of the wheelchair is dictated by the movements of the joystick control knob.
12. An indoor/outdoor battery powered electric childs wheelchair as claimed in claim 1. The platform is a rotational plastic moulded base.
13. An indoor/outdoor battery powered electric childs wheelchair as claimed in claim 1. The motorised wheels are of sufficient power to take a weight of twelve stone up a 1:4 incline.
14. An indoor/outdoor battery powered electric childs wheelchair as claimed in claim 1. The wheelchair has good stability because the centre of gravity has been included in the design over the length of the wheelchair so that it can drive down inclines safely.
GB9012646A 1990-06-06 1990-06-06 Electric four wheel drive wheelchair Withdrawn GB2244684A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9012646A GB2244684A (en) 1990-06-06 1990-06-06 Electric four wheel drive wheelchair
PCT/GB1991/000910 WO1991018577A1 (en) 1990-06-06 1991-06-06 Powered wheelchairs and wheels for them
AU79538/91A AU7953891A (en) 1990-06-06 1991-06-06 Powered wheelchairs and wheels for them

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9012646A GB2244684A (en) 1990-06-06 1990-06-06 Electric four wheel drive wheelchair

Publications (2)

Publication Number Publication Date
GB9012646D0 GB9012646D0 (en) 1990-07-25
GB2244684A true GB2244684A (en) 1991-12-11

Family

ID=10677177

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9012646A Withdrawn GB2244684A (en) 1990-06-06 1990-06-06 Electric four wheel drive wheelchair

Country Status (3)

Country Link
AU (1) AU7953891A (en)
GB (1) GB2244684A (en)
WO (1) WO1991018577A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2269145A (en) * 1992-07-30 1994-02-02 Roy Higgins Wheelchair wheel with self-contained motor
US5547038A (en) * 1991-08-01 1996-08-20 Madwed; Albert Wheeled chassis having independently pivotable drivewheels for omnidirectional motion
EP0933283A1 (en) * 1998-01-31 1999-08-04 DaimlerChrysler AG Device for maintaining a control element for controlling the transverse motion of a vehicle
WO2005037168A1 (en) * 2003-10-09 2005-04-28 Invacare Corporation Integral joystick display for a power driven wheelchair
WO2007118927A1 (en) * 2006-04-13 2007-10-25 Actioneco Oy Operation and control means and control arrangement for independently movable device with electric drive

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK48392D0 (en) * 1992-04-10 1992-04-10 Gemo 1991 Aps DRIVING CHASSIS FOR A WHEELCHAIR
DE69805068T2 (en) 1997-07-02 2002-11-07 Borringia Industrie Ag, Arlesheim DRIVE WHEEL

Citations (5)

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Publication number Priority date Publication date Assignee Title
FR2274476A1 (en) * 1974-06-17 1976-01-09 Gen Signal Corp HANDBRAKE AND EMERGENCY CONTROL SYSTEM, ESPECIALLY FOR RAIL VEHICLES
FR2350093A1 (en) * 1976-05-06 1977-12-02 Verschaeren Frans Electrically driven invalid chair - has motor for each wheel and lifting rams for negotiating obstacles
EP0160631A2 (en) * 1984-05-01 1985-11-06 Jeffrey Farnam Four-wheel drive wheelchair
GB2184987A (en) * 1985-12-16 1987-07-08 Jeremy Joseph Fry Wheelchair drive
GB2188889A (en) * 1986-04-01 1987-10-14 Spastics Soc Electrically driven wheelchair

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US3387681A (en) * 1966-02-14 1968-06-11 Rodney R. Rabjohn Power operated wheel chair
GB1230619A (en) * 1968-07-26 1971-05-05
GB2043554B (en) * 1979-02-02 1983-05-11 Biddle Eng Co Ltd Motorised wheelchairs
DE3410866A1 (en) * 1984-03-22 1985-10-03 Mannesmann AG, 4000 Düsseldorf WHEEL REDUCTION GEARBOX
DE3511647A1 (en) * 1985-03-29 1986-10-02 Horsch Maschinen GmbH, 8380 Landau SELF-DRIVING AGRICULTURAL TRACTOR
DE3545429A1 (en) * 1985-12-20 1987-08-20 Rexroth Mannesmann Gmbh Additional drive motor, especially wheel hub motor with internally actuated sliding sleeve
DE3545481A1 (en) * 1985-12-20 1987-07-02 Bayerische Motoren Werke Ag DRIVE DEVICE FOR MOTOR VEHICLES, ESPECIALLY PERSONAL VEHICLES

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2274476A1 (en) * 1974-06-17 1976-01-09 Gen Signal Corp HANDBRAKE AND EMERGENCY CONTROL SYSTEM, ESPECIALLY FOR RAIL VEHICLES
FR2350093A1 (en) * 1976-05-06 1977-12-02 Verschaeren Frans Electrically driven invalid chair - has motor for each wheel and lifting rams for negotiating obstacles
EP0160631A2 (en) * 1984-05-01 1985-11-06 Jeffrey Farnam Four-wheel drive wheelchair
GB2184987A (en) * 1985-12-16 1987-07-08 Jeremy Joseph Fry Wheelchair drive
GB2188889A (en) * 1986-04-01 1987-10-14 Spastics Soc Electrically driven wheelchair

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5547038A (en) * 1991-08-01 1996-08-20 Madwed; Albert Wheeled chassis having independently pivotable drivewheels for omnidirectional motion
GB2269145A (en) * 1992-07-30 1994-02-02 Roy Higgins Wheelchair wheel with self-contained motor
EP0933283A1 (en) * 1998-01-31 1999-08-04 DaimlerChrysler AG Device for maintaining a control element for controlling the transverse motion of a vehicle
WO2005037168A1 (en) * 2003-10-09 2005-04-28 Invacare Corporation Integral joystick display for a power driven wheelchair
US7003381B2 (en) * 2003-10-09 2006-02-21 Invacare Corporation Integral joystick display for a powder driven wheelchair
WO2007118927A1 (en) * 2006-04-13 2007-10-25 Actioneco Oy Operation and control means and control arrangement for independently movable device with electric drive

Also Published As

Publication number Publication date
AU7953891A (en) 1991-12-31
WO1991018577A1 (en) 1991-12-12
GB9012646D0 (en) 1990-07-25

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