Patent US5231282A successfully refreshed from Google Patents.
Patent US3642073A successfully refreshed from Google Patents.
US3642073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semimounted plow and colter
Assignee: Individual
•
Filing: 1967-09-07
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Granted: 1972-02-15
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Expires: 1987-09-07
Abstract
Abstract A semimounted moldboard plow connected to the draft links of a tractor by a hitch having longitudinal, upright and transverse pivotal movements with respect to the frame of the plow. The hitch is connected to a tailwheel of the plow so that the wheel turns in the direction of movement of the tractor. Each plow bottom of the plow is held in the ground working position by a hydraulic holding, release and return mechanism. Fluidly coupled with the hydraulic mechanism of each plow bottom is a fluid cylinder which yieldably holds a colter in ground-working position.
Inventors
- 👤 Cletus J Geurts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:49
CPC Classifications
A; A01; A01B; A01B59/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
147 words
In combination: a generally horizontal frame located above the ground, an earth-working tool, first movable means connecting the tool to the frame, a colter disc forwardly of the earthworking tool, second movable means connecting the colter disc to the frame, said second movable means including arm means pivotally connected to the frame for movement about a generally horizontal transverse axis whereby the colter disc can move in up and down directions, first fluid pressure means connected to the first movable means for holding the earth-working tool in a ground-working position, second fluid pressure means connected to the arm means for holding the colter in a ground-working position, and means connecting the first fluid pressure means and the second fluid pressure means to a common source of fluid under pressure whereby both the earth-working tool and colter disc are held in ground-working positions with comparable amounts of force.
Claim 2
Dependent Claim
147 words
In combination: a generally horizontal frame located above the ground, an earth-working tool, first movable means connecting the tool to the frame, a colter disc forwardly of the earthworking tool, second movable means connecting the colter disc to the frame, said second movable means including arm means pivotally connected to the frame for movement about a generally horizontal transverse axis whereby the colter disc can move in up and down directions, first fluid pressure means connected to the first movable means for holding the earth-working tool in a ground-working position, second fluid pressure means connected to the arm means for holding the colter in a ground-working position, and means connecting the first fluid pressure means and the second fluid pressure means to a common source of fluid under pressure whereby both the earth-working tool and colter disc are held in ground-working positions with comparable amounts of force.
Claim 3
Dependent Claim
93 words
The structure of claim 1 wherein the first movable means and the first fluid pressure means comprises a hydraulic holding and release mechanism haVing an upright standard secured to the earth-working tool, a frame positioned adjacent the standard, a stop engageable with the standard, a link pivotally connected to an upper portion of the standard, upright coacting guide means on the frame and standard cooperating with the link to control the movement of the earth-working tool, and a piston and cylinder unit for forcing and holding the standard in engagement with the stop.
Claim 4
Dependent Claim
31 words
The structure of claim 2 wherein the upright coacting guide means comprises arcuate track and rollers for directing the upward movement of the earth-working tool when the tool strikes an obstruction.
Claim 5
Dependent Claim
30 words
The structure of claim 2 including a beam, upright support means mounted on the beam, and pivot means rotatably mounting the piston and cylinder unit on the upright support means.
Claim 6
Dependent Claim
31 words
The structure of claim 1 wherein the second fluid pressure means comprises a piston and cylinder unit connected to the arm means for holding the colter disc in the ground-working position.
Claim 7
Dependent Claim
51 words
The structure of claim 5 including a stop engageable with the arm means, said stop being adjustable to vary the earth-working depth of the colter disc, said piston and cylinder unit operable to hold the arm means in engagement with the stop thereby holding the colter disc in its ground-working position.
Claim 8
Dependent Claim
15 words
The structure of claim 6 wherein the arm means is a generally right-angle crank arm.
References Cited (Backward Citations)
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US3061018A
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US3032122A
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US3161163A
Cited
US3349855A
Cited
US3416611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |