Land vehicles – Wheeled – Wheel steering by attendant
Patent
1993-09-28
1996-02-13
Culbreth, Eric D.
Land vehicles
Wheeled
Wheel steering by attendant
188282, 188319, 280 7911, 280400, B62B 300
Patent
active
054906849
ABSTRACT:
A camera dolly has a split chassis having front and rear sections connected by a journal. A hydraulic limiter dampens pivoting movement between the front and rear chassis sections. The limiter may be adjustable to provide variable dampening. Face plates on the front and rear chassis sections bear against each other in sliding engagement. The split chassis dolly or pedestal simulates 3-point suspension when the pedestal is at rest, when there is sufficient time for the front and rear sections to pivot with respect to each other and simulates 4-point suspension when the pedestal rolls on the floor as the intermittent forces acting to rotate the front end rear sections with respect to each other during rolling are resisted by hydraulic dampening.
REFERENCES:
patent: 1353848 (1920-09-01), Pavesi
patent: 2518288 (1950-08-01), Coutant
patent: 3442530 (1969-05-01), Guinot
patent: 4003584 (1977-01-01), Zelli
patent: 4004662 (1977-01-01), Sorgatz et al.
patent: 4076267 (1978-02-01), Lipscomb
patent: 4079955 (1978-03-01), Thorpe et al.
patent: 4249629 (1981-02-01), Hutt
patent: 4404263 (1983-09-01), Hodes et al.
patent: 4444409 (1984-04-01), Garrison
patent: 4950126 (1990-08-01), Fabiano et al.
patent: 4972928 (1990-11-01), Sirven
patent: 5220982 (1993-06-01), Anderson, Jr.
Chapman, "Chapman's Sidewinder" Brochure.
Chapman, "Zeus Stage Crane" Brochure.
Chapman, "Electra II/Nike" Brochure.
Photographs of Chapman Dolly.
Chapman's Sidwinder Brochure and 2 photographs, 1981.
Zeus Stage Crane Brochure and photographs, 1988.
Electra II/Nike Stage Crane Brochure, 1988.
Culbreth Eric D.
Leonard Studio Equipment, Inc.
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