US3893283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable width earth surface treating apparatus
Assignee: DANDL Manufacturing Co Inc
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Filing: 1974-06-20
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Granted: 1975-07-08
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Expires: 1994-06-20
Abstract
Abstract Earth surface treating apparatus such as a mower or flail, composed of two units which are drawn over an earth surface. One of the units is drawn in trailing relation to the other by means of an elongate drawbar. Means for adjusting the angular position of the drawbar so that the rear unit can be drawn immediately behind the forward unit or along a laterally displaced path. Mechanism on the apparatus for positioning the rear unit above the earth surface for high speed over the road travel, such mechanism affording return of the apparatus to an earth treating position as desired.
Inventors
- 👤 John E Dandl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:58
CPC Classifications
A; A01; A01D; A01D67/00; A01D67/005; A01B; A01B63/00; A01B63/02; A01B63/023; A01D75/00; A01D75/30; A01D75/303
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
154 words
Earth surface treating apparatus comprising a first surface treating unit mountable on a vehicle, a second surface treating unit having means for supporting the second unit for movement over the earth surface, a rigid drawbar having a first extremity pivotally secured to said first unit and a second extremity pivotally secured to said second unit so that said second unit trails said first unit, said extremities pivoting on substantially vertical axes, an actuator having first and second ends and means for controllably moving said ends toward and away from one another, said first end being attached to said second unit at a point laterally spaced from the second extremity of said drawbar, said second end of said actuator being attached to said drawbar at a point spaced from said second extremity, and means accessible from the vehicle for remotely controlling said actuator to vary the pivotal position of said drawbar relative said second unit.
Claim 2
Dependent Claim
154 words
Earth surface treating apparatus comprising a first surface treating unit mountable on a vehicle, a second surface treating unit having means for supporting the second unit for movement over the earth surface, a rigid drawbar having a first extremity pivotally secured to said first unit and a second extremity pivotally secured to said second unit so that said second unit trails said first unit, said extremities pivoting on substantially vertical axes, an actuator having first and second ends and means for controllably moving said ends toward and away from one another, said first end being attached to said second unit at a point laterally spaced from the second extremity of said drawbar, said second end of said actuator being attached to said drawbar at a point spaced from said second extremity, and means accessible from the vehicle for remotely controlling said actuator to vary the pivotal position of said drawbar relative said second unit.
Claim 3
Dependent Claim
50 words
Apparatus according to claim 1 wherein said supporting means comprises first and second earth contacting wheels, first and second axles journalling respective said wheels for rotation, and means for mounting said axles to said second unit so that said axles are oriented horizontally and in parallelism with said second unit.
Claim 4
Dependent Claim
39 words
Apparatus according to claim 2 wherein said axle mounting means includes first and second arms rigid with said second unit, said arms extending rearward of said second unit, said axles being mounted on the distal ends of said arms.
Claim 5
Dependent Claim
67 words
Apparatus according to claim 3 in combination with means for elevating said second unit above the earth surface to afford high speed over-the-road travel, said elevating means including means for fixing said second extremity to said second unit for pivotal movement about a horizontal axis and means for pivoting said second unit about said horizontal axis to cause said second unit to rotate upward about said axles.
Claim 6
Dependent Claim
122 words
Apparatus according to claim 4 wherein said fixing means includes right and left plates rigid with said unit, said plates being mutually parallel and confronting one another across a space, a generally rectangular frame having a horizontal upper leg, right and left vertical legs depending from respective ends of said horizontal leg, and a lower horizontal leg joined to and extending between the vertical legs at a level below the upper leg, said rectangular frame being sized to fit within said space, and right and left horizontally extending stub shafts pivotally connecting the lower ends of said vertical legs to respective said plates, and wherein said pivoting means includes a longitudinally extensible link extending between said horizontal leg and said second unit.
Claim 7
Dependent Claim
68 words
Apparatus according to claim 5 including at least one trunnion plate secured to said rectangular frame and extending forward from said second unit, said trunnion plate having a vertically extending bore therein, said second extremity of said drawbar having a corresponding bore, and a pivot pin disposed in said bores for affording relative pivotal movement about the axis of said pin between said second unit and said dRawbar.
Claim 8
Dependent Claim
56 words
Apparatus according to claim 4 wherein said arms are each formed of two sections, there being means for joining said sections to one another for relative pivotal movement, and means adjustably establishing the angle between said sections, last said means cooperating with said elevating means to afford adjustment of the angular position of said second unit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |