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US 4,778,013 AGranted
Plow with adjustable moldboard
OwnerCornelis Van der Lelyinventor
Life of this patent
Estimating the term…
Abstract
A frame beam supports a plurality of plow bodies, the front plow body of which has a one-piece moldboard and is pivotable about an upwardly extending axis. Part of the moldboards of each of the following plow bodies is pivotable about an upwardly extending axis relative to the remainder of each such moldboard. Adjustment is made through rod systems from a common rod which is displaceable mechanically by a screwthreaded spindle or hydraulically by a piston and cylinder assembly. The latter adjustment is effected automatically in response to the tractive force required to drive the plow through the soil.
Claims12
A plow system, comprising:
- a pivotal frame which is provided with means for being coupled to a tractor's three point lifting device;
- a main frame beam that extends obliquely rearwardly with respect to the plow system's operative direction of travel;
- a plurality of paired plowbodies mounted equidistantly apart along said main frame beam, each plowbody of a front pair of said paired plowbodies having a share and an adjustable moldboard and each plowbody of subsequent pairs of said paired plowbodies having a share, a land side, a fixed moldboard part and an adjustable moldboard;
- a support arm connecting each said plowbody to a support attached to said main frame beam;
- a hinge pin for each said pair of plowbodies attached at each end to a said adjustable moldboard of said plowbody of said paired plowbodies, said hinge pin connected at its center part to adjustment means comprising an adjustment arm and a movable rod, each said adjustment arm being essentially horizontal and extending essentially transversely with respect to said operative direction of travel and said movable rod being essentially horizontal and extending essentially parallel to said operative direction of travel;
- a transverse shaft connected at one end to said movable rod and at an opposite end to a lever, said lever pivotable about an essentially vertical pin and having its opposite end attached to an adjustment rod lying essentially parallel to and along the length of said main frame beam;
- whereby said adjustable moldboards may be adjusted to accommodate different types and conditions of soil.
4 more elements
A plow system, comprising:
- a frame which is provided with means for being coupled to a tractor's three-point lifting device;
- a main frame beam that extends obliquely rearwardly with respect to the direction of the plow system's travel, a plurality of paired plowbodies mounted equidistantly apart along said main frame beam, each said plowbody of said plowbodies having a share and a moldboard, a major part of each said moldboard being pivotable with respect to the remainder of said moldboard about a substantially vertical axis afforded by a substantially vertical hinge pin disposed near the rear side of its corresponding said moldboard with respect to the plow system's operative direction of travel;
- said hinge pin being connected to an adjustment means, said adjustment means including an adjustment arm and a forward extending rod;
- said major part of each said moldboard overlapping said remainder of said moldboard, said hinge pin attached to each said moldboard being connected to a said adjustment arm for each said moldboard, each said adjustment arm being disposed above said plowbody and connected by means of a forward extending rod to a lever for each said moldboard;
- said lever being pivotally connected to an adjustment rod that extends substantially parallel to said main frame beam and is adapted collectively to adjust the relative dispositions of said moldboard parts for different types and conditions of soil.
2 more elements
Dependencies are inferred from the claim text.