Motor vehicles – Steering by driving – Independently operable drive motors
Patent
1982-09-30
1984-10-09
Peters, Jr., Joseph F.
Motor vehicles
Steering by driving
Independently operable drive motors
180 11, 180 60, 180 651, 182 13, 188159, 318376, B62D 1106, E04G 126
Patent
active
044756119
ABSTRACT:
A propulsion unit for span scaffolds having vertical castered columns at the four corners thereof. The propulsion unit includes a first elongated frame member extending between the columns on one side of the scaffold, a second elongated frame member extending between the columns on the other side of the scaffold, and a third, wheeled, frame member extending crosswise between the first and second frame members, the third frame member being mounted on the first and second frame members for limited free vertical movement relative thereto.
REFERENCES:
patent: 2874791 (1959-02-01), Mellencamp
patent: 3438456 (1969-04-01), Hunter
patent: 3731758 (1973-05-01), Hibma
patent: 3930548 (1976-01-01), Wallraff
patent: 3947740 (1976-03-01), Tsuboi
patent: 4053025 (1977-10-01), Slusarenko
Up-Right, Berkeley, California, Sales Brochure _"Aluminum Span Scaffolds".
Applied Design Products, Barrington, Illinois, Sales _Brochure, "Lil Propeller".
Scaffold Scooters, Phoenix, Oregon, Sales Brochure.
Fugate D. Lynn
Peters Jr. Joseph F.
Up-Right, Inc.
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