Earth working – With actuator on trailing ground supported frame for moving... – Vertically
Patent
1977-07-01
1978-08-22
Johnson, Richard J.
Earth working
With actuator on trailing ground supported frame for moving...
Vertically
2804145, A01B 5904
Patent
active
041082494
ABSTRACT:
A disc harrow has a shock absorbing and frame attitude maintaining mechanism which embodies a bell crank lever pivotally connected at its apex to the hinged hitch structure of the implement frame. One arm of the lever is operatively connected through a rigid link to the rockshaft which is axially rotated to raise and lower the transport wheels of the implement. The other arm of the lever is connected to one member of a vertically extending spring-loaded link having a second member anchored to the implement frame. This second member has a pair of stops between which a spring is confined in compression; and the first member acts on the spring against one or the other of said stops in response to both raising and lowering of the transport wheels to maintain a constant frame attitude.
REFERENCES:
patent: 2320742 (1943-06-01), Newkirk
patent: 2717479 (1955-09-01), Scheidenhelm
patent: 3082830 (1963-03-01), McKay
patent: 3299966 (1967-01-01), Clifford
patent: 3708018 (1973-01-01), Wilbeck
patent: 3809165 (1974-05-01), Miller
patent: 3912017 (1975-10-01), Rehn
Anderson Carl M.
Poland Robert L.
Chromalloy Farm and Industrial Equipment Co.
Johnson Richard J.
Lee George F.
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