Stair climbing conveyance
United States Patent 3166138
US Patent References:
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- - 0653199

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- - 0838228

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- - 1105379

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- - 1111510

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Inventors:
Dunn Jr., Edward D.
Publication Date:
01/19/1965
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Assignee:
Dunn Jr., Edward D.
Primary Class:
180/9.230
Other Classes:
180/65.600, 280/211, 180/9.320, 180/9.100, 280/5.220, 180/9.480, 280/11, 280/DIG.010
International Classes:
A61G5/06; B62D55/075; A61G5/00; B62D55/00
US Patent References:
1738523Vehicle
1858753Expansible bushing for winding cores
1930823Vehicle propelling mechanism
2259871Clutch control
2319008Carriage truck
2578828Ambulatory invalid chair
2592023Motor-driven invalid's chair
2605852Steering control for track laying vehicles
2634663Tractor
2765860Selective wheeled or endless belt supports for self-propelled vehicles
2793868Carrier cart provided with stair climbing endless treads
2824597Wheel chair width control
2978095Elevating belt conveyor for discrete materials in bulk
3127188
Foreign References:
DE968705C
GB541253A