Earth working – Mounting for pushed tool at end of motor vehicle – Tool prepares wheel path for passage of wheel
Patent
1979-05-21
1981-02-24
Shapiro, Paul E.
Earth working
Mounting for pushed tool at end of motor vehicle
Tool prepares wheel path for passage of wheel
172501, 172618, 172712, A01B 1910, A01B 2304, A01B 5906, A01B 63108
Patent
active
042521980
ABSTRACT:
A support member for stationary support from a tractor forward of a ground wheel thereof and an elongated front to rear extending mount has its front end supported from the support member for pivotal movement of the mount between a predetermined rearwardly and downwardly inclined operative position with the rear end at an elevation lower than the support member and a raised inoperative position with the rear end elevated above the aforementioned operative position. An elongated inclined ground engaging and levelling member has its upper end oscillatably supported from the rear end of the mount for free oscillation relative to the mount between a first operative ground engaging limit position with the inclined member rearwardly and downwardly inclined and a second limit position with the inclined member similarly forwardly and downwardly inclined. Further, motor structure is provided for operative connection between the associated tractor and the mount for raising the latter from the operative position to the inoperative position thereof, the motor structure enjoying a one-way connection between the associated tractor and the mount whereby it is effective, only, to limit downward movement of the rear end of the support member toward its operative position.
REFERENCES:
patent: 2070964 (1937-02-01), Scott et al.
patent: 2324840 (1943-07-01), Hipple
patent: 2631513 (1953-03-01), Silver et al.
patent: 3524508 (1970-08-01), West
patent: 3823781 (1974-07-01), Check et al.
patent: 3976145 (1976-08-01), Blair
Jacobson Harvey B.
O#Brien Clarence A.
Shapiro Paul E.
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