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Title:
Stair climbing conveyance
United States Patent 3166138
Inventors:
Dunn Jr., Edward D.
Application Number:
US14779561A
Publication Date:
01/19/1965
Filing Date:
10/26/1961
Assignee:
Dunn Jr., Edward D.
Primary Class:
Other Classes:
180/9.1, 180/9.32, 180/9.48, 180/65.6, 280/5.22, 280/11, 280/211, 280/DIG.10
International Classes:
A61G5/06; B62D55/075
View Patent Images:
US Patent References:
3127188N/A1964-03-31
2978095Elevating belt conveyor for discrete materials in bulk1961-04-04
2824597Wheel chair width control1958-02-25
2793868Carrier cart provided with stair climbing endless treads1957-05-28
2765860Selective wheeled or endless belt supports for self-propelled vehicles1956-10-09
2634663Tractor1953-04-14
2605852Steering control for track laying vehicles1952-08-05
2592023Motor-driven invalid's chair1952-04-08
2578828Ambulatory invalid chair1951-12-18
2319008Carriage truck1943-05-11
2259871Clutch control1941-10-21
1930823Vehicle propelling mechanism1933-10-17
1858753Expansible bushing for winding cores1932-05-17
1738523Vehicle1929-12-10
1237499N/A1917-08-21
1111510N/A1914-09-22
1105379N/A1914-07-28
0838228N/A1906-12-11
0653199N/A1900-07-03
Foreign References:
DE968705C1958-03-20
GB541253A1941-11-19