Earth working – Diverse tools – Second implement follows path of first
Patent
1988-05-12
1989-04-18
Johnson, Richard J.
Earth working
Diverse tools
Second implement follows path of first
1724452, 172448, E02F 3815
Patent
active
048218103
ABSTRACT:
The utility blade assembly for use on tractors having a three-point hitch connection. The blade assembly includes an elongated boom having a turntable mounted on the rear end thereof. The turntable carries a utility blade. Hydraulic piston and cylinder subassemblies are provided for rotating the blade on the turntable. At its forward end, the boom extends through a sleeve in which it is free to rotate about its axis. The sleeve carries aligned laterally projecting elements which function to support the sleeve and boom for rotation about a transversely extending horizontal axis. A piston and cylinder subassembly is provided for pivoting the boom and sleeve about this horizontal axis so that the rear end of the boom carrying the turntable and utility blade can be lifted upwardly. A boom rotating piston and cylinder subassembly is provided for rotating the boom about its longitudinal axis.
REFERENCES:
patent: 2493565 (1950-01-01), Arps
patent: 2560711 (1951-07-01), Arps
patent: 2710467 (1955-06-01), Cundiff
patent: 2723472 (1955-11-01), Bartlett
patent: 2762140 (1956-09-01), Elfes
patent: 2822628 (1958-02-01), Arps
patent: 3324955 (1967-06-01), Perold
patent: 3566547 (1951-09-01), Bartlett
patent: 3797582 (1972-03-01), Couch
patent: 4061194 (1977-12-01), McCanse
patent: 4337833 (1982-07-01), Welch
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