US3757868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tractor-implement hitch control
Assignee: Deere and Co
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Filing: 1972-06-12
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Granted: 1973-09-11
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Expires: 1992-06-12
Abstract
Abstract A hitch control of the type wherein the working depth of the implement depends upon the draft between the tractor and implement, with provision for draft-sensing in both ''''positive'''' and ''''negative'''' phases and featuring means for locking out negative sensing when the implement is in its raised or transport position.
Inventors
- 👤 S Gregerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:19
CPC Classifications
A; A01; A01B; A01B63/00; A01B63/02; A01B63/10; A01B63/111; A01B63/112
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
132 words
A tractor power system for adjusting a tractor-connected implement, including tractor structure, a power unit, operator means for controlling the power unit, a depth responder movable by the power unit in accordance with adjustment of the implement, a load responder movable by the implement in accordance with changes in implement working load, means for operating the operator means, and a force-transmitting means connected to the operating means and selectively settable in a first position for movement back and forth by the depth responder or in a second position for movement back and forth by the load responder, characterized in that one-way stop means is engageable between the tractor structure and the force-transmitting means when the force-transmitting means is in its second position for limiting movement of the force-transmitting means in one direction.
Claim 2
Dependent Claim
132 words
A tractor power system for adjusting a tractor-connected implement, including tractor structure, a power unit, operator means for controlling the power unit, a depth responder movable by the power unit in accordance with adjustment of the implement, a load responder movable by the implement in accordance with changes in implement working load, means for operating the operator means, and a force-transmitting means connected to the operating means and selectively settable in a first position for movement back and forth by the depth responder or in a second position for movement back and forth by the load responder, characterized in that one-way stop means is engageable between the tractor structure and the force-transmitting means when the force-transmitting means is in its second position for limiting movement of the force-transmitting means in one direction.
Claim 3
Dependent Claim
46 words
The invention defined in claim 1, further characterized in that the stop means includes a first abutment on the force-transmitting means and a second abutment on the tractor structure, and means for adjusting one of the abutments along the path of movement of the force-transmitting means.
Claim 4
Dependent Claim
20 words
The invention defined in claim 2, further characterized in that the adjusting means is accessible exteriorly of the tractor structure.
Claim 5
Dependent Claim
59 words
The invention defined in claim 2, further characterized in that the tractor structure includes a housing wall enclosing the actuator, responders and force-transmitting means, the first abutment is fixed to the force-transmitting means, and the second abutMent is carried by the housing wall for adjustment relative to the first abutment along the path of movement of the force-transmitting means.
Claim 6
Dependent Claim
70 words
The invention defined in claim 4, further characterized in that the second abutment includes an element projecting through and rotatably carried by the housing wall and having inner and outer ends respectively interiorly and exteriorly of the wall, the inner end has a stop portion eccentric with respect to the rotational axis of the element and the outer end has a tool-receiving portion to enable rotative adjustment of the element.
Claim 7
Dependent Claim
24 words
The invention defined in claim 5, further characterized in that friction means is provided for releasably retaining the selected adjusted positions of the element.
Claim 8
Dependent Claim
45 words
The invention defined in claim 6, further characterized in that the housing wall has an opening therethrough, a tubular carrier is mounted in the opening and the element is coaxially carried by the carrier and the friction means cooperates between the carrier and the element.
Claim 9
Dependent Claim
44 words
The invention defined in claim 7, further characterized in that the carrier has an internal shoulder, the element has an outer stop spaced axially from the shoulder and the friction means includes a resilient means acting between said last named stop and the shoulder.
Claim 10
Dependent Claim
31 words
The invention defined in claim 7, further characterized in that the housing wall opening is internally threaded and a portion of the carrier is externally threaded and screwed into the opening.
Claim 11
Dependent Claim
20 words
The invention defined in claim 7, further characterized in that a contaminant seal is provided between the carrier and element.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |