Earth working – With ground support vertically adjustable relative to frame – Power operated adjustment
Patent
1977-02-14
1978-02-14
Stouffer, Richard T.
Earth working
With ground support vertically adjustable relative to frame
Power operated adjustment
92 138, 92 23, 172466, 280 4323, A01B 6322
Patent
active
040733459
ABSTRACT:
An apparatus for positively locking the wheels of a disc in transport and depth control positions. The disc harrow comprises a frame having disc sections thereto. A transversely extending axle is secured to the frame and has ground engaging wheels at the opposite ends thereof which control the discing depth and transport height. A hydraulic cylinder is secured at its forward base end to the frame and has the rearward end of its cylinder rod pivotally connected to the axle to raise and lower the wheels with respect to the frame. A spacer assembly slidably embraces the cylinder rod. A cylinder stroke lock assembly is pivotally connected, at its rearward end, to the rearward end of the cylinder rod for pivotal movement between a first horizontal position and a second upstanding position. The spacer assembly comprises a spacer tube and spacing washers. The spacing washers may be selectively moved with respect to the cylinder stroke lock assembly to permit depth control adjustment. The cylinder stroke lock assembly, when the spacer assembly is positioned rearwardly of the forward end of the lock assembly, permits the cylinder rod to freely slidably move inwardly into the hydraulic cylinder. The forward end of the cylinder stroke lock assembly is adapted to engage the spacer assembly to limit the inward movement of the cylinder rod into the cylinder when the cylinder stroke lock assembly is in its horizontal position.
REFERENCES:
patent: 2939539 (1960-06-01), Kramer
patent: 2994544 (1961-08-01), Wolf
patent: 3008772 (1961-11-01), Helsel, Sr.
patent: 3177976 (1965-04-01), Wenzel
patent: 3260315 (1966-07-01), Day
patent: 3809165 (1974-05-01), Miller
patent: 3905279 (1975-09-01), Yadon
patent: 3982648 (1976-09-01), Luedtke et al.
patent: 4039093 (1977-08-01), Schmitz, Jr. et al.
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