Patent US4344639A successfully refreshed from Google Patents.
US4344639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual implement hitch
Assignee: Case LLC
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Filing: 1980-05-29
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Granted: 1982-08-17
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Expires: 2000-05-29
Abstract
Abstract A dual implement hitch for connection between a tractor and the implements for moving the implements to preferably an echelon position for field operation and to a tandem position for transport, while maintaining the tractor hitch pin on the line of pull of the implements. The hitch includes a hitch tongue pivotally connected to the tractor and to a support attached to the first implement. A curved beam is pivotally connected to the support forward of the tongue connection thereto and extends rearwardly over the first implement in the transport position to a caster wheel support and a pivotal connection to the second implement. Link means are pivotally connected to the hitch tongue and curved beam rearward of the pivotal connection of the curved beam to the support. A single hydraulic cylinder connected to the support and tongue provides the power for the movement of both implements to the noted positions from the tractor seat.
Inventors
- 👤 Lorne R. Pollard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:52
CPC Classifications
B; B60; B60D; B60D1/00; B60D1/14; A; A01; A01B; A01B73/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
203 words
In combination, an implement and a hitch adapted to be drawn by a tractor, comprising: an implement, a support mounted on the front of said implement, a hitch, said hitch including a curved beam pivotally mounted on said support and constructed to extend over and rearwardly of said implement, said curved beam being adapted to be pivotally connected adjacent its rearward end to another implement, a caster wheel mounted on said curved beam forward of the connection for the another implement, a hitch tongue adapted to be pivotally connected to a tractor drawbar, said tongue also being pivotally connected to said support, means connecting said tongue and curved beam for relative motion therebetween, said means being located rearwardly of the pivotal mounting of said curved beam on said support, and hydraulic power means mounted on said support for moving said hitch tongue and said curved beam via said means from a tandem transport implement position wherein the line of pull to the tractor is substantially aligned with the center of said implement and the another implement and an echelon operating position wherein the line of pull of the tractor is substantially aligned with the adjacent ends of said implement and the another implement.
Claim 2
Dependent Claim
203 words
In combination, an implement and a hitch adapted to be drawn by a tractor, comprising: an implement, a support mounted on the front of said implement, a hitch, said hitch including a curved beam pivotally mounted on said support and constructed to extend over and rearwardly of said implement, said curved beam being adapted to be pivotally connected adjacent its rearward end to another implement, a caster wheel mounted on said curved beam forward of the connection for the another implement, a hitch tongue adapted to be pivotally connected to a tractor drawbar, said tongue also being pivotally connected to said support, means connecting said tongue and curved beam for relative motion therebetween, said means being located rearwardly of the pivotal mounting of said curved beam on said support, and hydraulic power means mounted on said support for moving said hitch tongue and said curved beam via said means from a tandem transport implement position wherein the line of pull to the tractor is substantially aligned with the center of said implement and the another implement and an echelon operating position wherein the line of pull of the tractor is substantially aligned with the adjacent ends of said implement and the another implement.
Claim 3
Dependent Claim
15 words
The combination of claim 1 wherein said hydraulic power means is connected to said tongue.
Claim 4
Dependent Claim
22 words
The combination of claim 2 in which said means is a link means pivotally connected to said tongue and said curved beam.
Claim 5
Dependent Claim
32 words
The combination of claim 3 in which said hydraulic power means is a double acting cylinder and is connected to said tongue forward of the connection of said tongue to said support.
Claim 6
Dependent Claim
38 words
The combination of claim 4 in which said curved beam has a horizontal pivot adjacent its connection to said support for movement in a vertical plane due to varying ground elevations in transport and in echelon operating positions.
Claim 7
Dependent Claim
23 words
The combination of claim 5 further comprising means on said curved beam for varying the positions between said implement and the another implement.
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) | 1985-08-16 | 1986-02-15 | 1986-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-16 | 1990-02-15 | 1990-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-16 | 1994-02-15 | 1994-08-17 | $7700.00 | Window Closed / Lapsed |