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Title: US5248007: Electronic control system for stair climbing vehicle
[ Derwent Title ]

Country: US United States of America

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29 pages

 
Inventor: Watkins, Baxter R.; Foster City, CA
Littlejohn, Douglas J.; Sunnyvale, CA
Hessler, John H.; Sunnyvale, CA
Staggs, Havard L.; Mountain View, CA
Kuen, Chi-Foun; Mountain View, CA

Assignee: Quest Technologies, Inc., Sunnyvale, CA
other patents from QUEST TECHNOLOGIES, INC. (683552) (approx. 4)
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Published / Filed: 1993-09-28 / 1990-11-01

Application Number: US1990000604652
IPC Code: Advanced: A61G 5/06; A61G 5/10;
IPC-7: A61G 5/06;

ECLA Code: A61G5/06A; A61G5/06C; K61G5/10S10; K61G5/10S12; K61G5/10S14; K61G203/14;

U.S. Class: Current: 180/009.32; 180/065.8; 180/169; 180/907; 280/DIG.010; 701/001;
Original: 180/009.32; 180/169; 180/065.8; 180/907; 280/DIG.10; 364/424.01;

Field of Search: 180/9.32,907,167,168,169,65.8,65.1 280/304.1,250.1,DIG. 10 364/424.01,424.02,424.07,434

Priority Number:
1990-11-01  US1990000604652

Abstract: An electronic control system for a stair climbing vehicle, such as a wheelchair is disclosed. Front and back sensors are provided for detecting a stairway or slope. The electronic control system determines from the sensor data whether the slope has an acceptable incline for traversing. If it is not acceptable, the vehicle will be prevented from entering onto the stairway or slope. A seat for a user is tilted in accordance with electronic controls to keep the user approximately vertical with respect to gravity as the vehicle traverses the stairs. The allowed operation of the vehicle is controlled via parameters which can be changed by removable memory which configures the vehicle for a particular user or group of users.

Attorney, Agent or Firm: Townsend and Townsend Khourie and Crew ;

Primary / Asst. Examiners: Focarino, Margaret A.; Boehler, Anne Marie
Maintenance Status: E2 Expired  Check current status

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Related Applications:
Application Number Filed Patent Pub. Date  Title
US1989000440054 1989-11-21    1992-06-23  Wheelchair stair climbing control system


       
Parent Case:     This application is a continuation-in-part of pending application Ser. No. 07/440,054, filed Nov. 21, 1989, now U.S. Pat. No. 5,123,495.

Designated Country: BE CH DE FR GB IT LI NL SE 

Family: Show 18 known family members
First Claim:
Show all 12 claims		 What is claimed is:     1. A stair-climbing personal transport vehicle comprising:
  • a first forward ranging sensor;
  • a second rearward ranging sensor;
  • electronic means, responsive to said sensors, for determining the slope of a stairway and for controlling a motor for said vehicle to prevent movement over a stairway exceeding predetermined geometric characteristics;
  • means, responsive to a determined slope from said electronic means, for inclining a seat on said vehicle to a minimum safe angle for preventing rollover of said vehicle for said slope to modify the center of gravity of said vehicle and user to prevent rollover of said vehicle on said stairway;
  • controller means for driving said motor in accordance with an algorithm;
  • enabling means, coupled to said controller means, for enabling operation of said vehicle in response to a key code; and
  • a detachable, programmable memory for providing said key code to said enabling means and constants for said algorithm.
    •


Background / Summary: Show background / summary

Drawing Descriptions: Show drawing descriptions

Description: Show description

Forward References: Show 100 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (100)   |   Backward references (70)   |   Citation Link

Buy
PDF		 Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 12pp USRE28256  1974-11 Zamotin   WHEEL CHAIR
Get PDF - 9pp US2765860  1956-10 Church   Selective wheeled or endless belt supports for self-propelled vehicles
Get PDF - 7pp US3068950  1962-12 Davidson   Adjustable motor-driven invalid chair with endless tracks
Get PDF - 6pp US3077345* 1963-02 Andersson et al.    
Get PDF - 5pp US3111331  1963-11 Locke   Stair-climbing wheel chair
Get PDF - 7pp US3127188* 1964-03 Greub    
Get PDF - 11pp US3133742  1964-05 Richison et al.   Stairclimbing wheelchair
Get PDF - 16pp US3142351  1964-07 Green   Stair climbing wheelchair
Get PDF - 5pp US3146841  1964-09 Locke   Stair-climbing wheel chairs
Get PDF - 16pp US3166138  1965-01 Dunn, Jr.   Stair climbing conveyance
Get PDF - 11pp US3178193  1965-04 Grogan   Stairclimbing wheelchair
Get PDF - 11pp US3191953  1965-06 Aysta   Stair climbing wheel chair
Get PDF - 7pp US3195910  1965-07 Steiner   Stair-climbing vehicle
Get PDF - 8pp US3196970  1965-07 Brenner   Stair-climbing wheel chair
Get PDF - 8pp US3198534  1965-08 Porter   Stair climbing wheel chair
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Get PDF - 17pp US3231036  1966-01 Appendrodt   Stair climbing invalid carriages
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Get PDF - 4pp US3259200  1966-07 Maijala   Folding self-propelled invalid chair
Get PDF - 13pp US3259396  1966-07 Zamotin   Wheel chair
Get PDF - 17pp US3288234  1966-11 Feliz   Stair climbing conveyance
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Get PDF - 13pp US4387325  1983-06 Klimo  Invacare Corporation Electric wheelchair with speed control circuit
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Get PDF - 17pp US4432426  1984-02 Misawa  Sunwa Sharyo Manufacturing Company Limited Stair climbing wheelchair carrier
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Get PDF - 40pp US4556997  1985-12 Takamiya et al.  Aisin Seiki Kabushiki Kaisha Apparatus for driving medical appliances
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Get PDF - 18pp US4566550  1986-01 Misawa  Sunwa Sharyo Manufacturing Co., Ltd. Stair-climbing wheelchair carrier
Get PDF - 15pp US4566551  1986-01 Feliz   Stair-climbing conveyance
Get PDF - 7pp US4566706  1986-01 Bihler et al.  Kleindienst GmbH Easy-adjust stair climber for wheelchair
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Get PDF - 15pp US4620285  1986-10 Perdue  Heath Company Sonar ranging/light detection system for use in a robot
Get PDF - 15pp US4627508  1986-12 Auer   Step-negotiating vehicle
Get PDF - 16pp US4634941  1987-01 Klimo  Invacare Corporation Electric wheelchair with improved control circuit
Get PDF - 10pp US4674584  1987-06 Watkins  Rosenberg; Gordon W. Stair-climbing wheelchair with stair step sensing means
Get PDF - 21pp US4688813  1987-08 Misawa et al.  Sunwa Sharyo Manufacturing Co., Ltd. Carrier for rescuing patients
Get PDF - 11pp US4733355  1988-03 Davidson et al.  Agtek Development Company, Inc. Non-contacting range sensing and control device
Get PDF - 8pp US4747457  1988-05 Buscaiolo et al.  FRAMAB S.n.c. Platform truck for transporting bulky loads
Get PDF - 10pp US4771839  1988-09 Misawa  Sunwa Sharyo Manufacturing Co., Ltd. Stair-climbing wheelchair carrier
Get PDF - 4pp US4854408  1989-08 Beard et al.  The Secretary of State for Defence in her Majesty's Government of the United Kingdom of Great Britian and Northern Ireland Obstacle surmounting aid for tracked vehicle
Get PDF - 15pp US4898256  1990-02 Lehner  Sunwa Sharyo Manufacturing Co., Ltd. Stair-climbing wheelchair carrier with crawlers
Get PDF - 8pp US4915184  1990-04 Watkins  Quest Technologies Corp. Cushioning mechanism for stair-climbing wheelchair
Get PDF - 15pp US4977971  1990-12 Crane  University of Florida Hybrid robotic vehicle
Get PDF - 12pp US5033000  1991-07 Littlejohn et al.  Natco Corporation Variable keyed power distribution and control system for motorized wheelchair
Get PDF - 14pp US5040116  1991-08 Evans et al.  Transitions Research Corporation Visual navigation and obstacle avoidance structured light system
Get PDF - 23pp US5076384  1991-12 Wada et al.  Mitsubishi Denki Kabushiki Kaisha Ultrasonic obstacle sensor
Get PDF - 13pp US5123495  1992-06 Littlejohn et al.  Quest Technologies, Inc. Wheelchair stair climbing control system
  * some details unavailable
       
Foreign References: None

Other Abstract Info: DERABS G91-201889

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