Road structure – process – or apparatus – Apparatus – Rotating drum – roller or tire
Patent
1974-09-06
1976-06-29
Byers, Nile C.
Road structure, process, or apparatus
Apparatus
Rotating drum, roller or tire
172170, 280468, E01C 1926
Patent
active
039663450
ABSTRACT:
A tandem road roller having a pair of rolls arranged one behind the other which are capable of both pivoting relative to each other to negotiate curves and being offset relative to each other to vary the width of the roller track. The roller comprises a first frame member carried on the front roll, a second frame member carried on the rear roll, a connecting bar member hinged at opposite ends to the first and second frame members between the rolls, and an actuating mechanism operating on the first and second frame members to control their angular relationship and to control their lateral offset. Preferably the actuating mechanism includes two fluid pressure operated double-acting piston and cylinder assemblies and in this case one of the piston and cylinder assemblies is preferably arranged parallel to but spaced apart from the intermediate frame member and the other piston and cylinder assembly is connected diagonally between the one piston and cylinder assembly and the intermdiate frame member. With this arrangement one piston and cylinder assembly controls the steering of the roller whilst the other controls the rolling width of the roller.
REFERENCES:
patent: 496349 (1893-04-01), Credlebaugh
patent: 1369977 (1921-03-01), McLaren
patent: 1637208 (1927-07-01), Wilson
patent: 1650746 (1927-11-01), Stubbs
patent: 2132107 (1938-10-01), Hamm
patent: 3099942 (1963-08-01), Leister
patent: 3368292 (1968-02-01), Prinoth
patent: 3394641 (1968-07-01), Steck
patent: 3454285 (1969-07-01), Van Peursem
Byers Nile C.
Koehring GmbH -- Bomag Division
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