Plow with correlated pull bar adjustment and support wheel steering
AssigneeAllis-Chalmers Corporation
InventorsDawson W. Hastings, Robert L. Wagner
Life of this patent
Estimating the term…
Abstract
An articulated plow is provided with a laterally swingable pull bar (31) and steerable intermediate support wheels (46, 47) which are controlled by a hydraulic system providing correlated movement through parallel connected hydraulic jacks (37, 66). A latch mechanism (86) for releasably securing the pull bar (31) in its plowing position of adjustment is operated by the pull bar control jack (37) through an operating lever (41) having a lost motion connection with a spring loaded latch pin (87). A locking plate (131) is provided to automatically lock the latch pin (87) in its retracted position when the pull bar (31) is moved to its transport position.
Claims7
An articulated plow having front and rear sections whose adjacent ends are pivotally interconnected on a transverse horizontal axis and whose remote ends are supported by ground engaging wheels characterized by
- a longitudinally extending pull bar having
- a front end adapted for connection to a tractor and
- a rear end pivotally connected to said front section for laterally swinging movement about an upright axis between plowing and transport positions,
- a centrally located support wheel mounted on one of said sections for steering movement about a vertical axis between plowing and transport positions,
- means operable to steer said centrally located support wheel including a first expansible and contractible hydraulic jack,
- means operable to move said pull bar between its plowing and transport positions including a second expansible and contractible hydraulic jack connected in parallel to said first hydraulic jack, and
- a hydraulic control system for said jacks including a source of pressure fluid, a control valve connected in controlling relation to said jacks and shiftable between plowing and transport positions, said pull bar and centrally located support wheel being simultaneously moved to their plowing and transport positions when said control valve is placed in its plowing and transport positions, respectively.
Dependencies are inferred from the claim text.