Road structure – process – or apparatus – Apparatus – Automatic control
Patent
1975-01-27
1976-06-22
Byers, Nile C.
Road structure, process, or apparatus
Apparatus
Automatic control
404122, E01C 1900
Patent
active
039648346
ABSTRACT:
Apparatus for effecting passes of a self-propelled compacting machine following a spreading machine after the latter has laid a strip of surfacing composition. A guide vehicle is hitched to the spreading machine and is towed therewith, and has a guide member which may either have the contour of a closed geometrical figure such as a circle or be simply a pivot. The compacting machine turns about the guide vehicle along an epicycloidal path of travel. A sensing device on the compacting machine which may be a feeler or a flexible member is responsive to the variations of the radial distance between the compacting machine and guide member. The sensing device operates a limit switch when the variations exceed a predetermined amount which in turn controls an electrically operable hydraulic valve which communicates with a double-action cylinder and piston unit controlling in turn the direction of the front wheel of the compacting machine for increasing or decreasing the turning radius thereof. The compacting machine is thus entirely automatic and needs no driver when in operation. Such a compacting machine is also provided with a conventional steering wheel and can be used independently of the guide vehicle and the spreading machine.
REFERENCES:
patent: 1157899 (1915-10-01), Peterson
patent: 2342445 (1944-02-01), Allen
patent: 2898826 (1959-08-01), Livermont
patent: 3221619 (1965-12-01), Erickson
patent: 3232189 (1966-02-01), Young
patent: 3258082 (1966-06-01), Amos
patent: 3774401 (1973-11-01), Allen
patent: 3848690 (1974-11-01), Hawkins
De La Sayette Emmanuel R.
Girard Jacques J.
Paramythioti Michel
Albaret S.A.
Byers Nile C.
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