Patent US4069885A successfully refreshed from Google Patents.
US4069885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tractor-implement arrangement for establishing frictional engagement therebetween
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1976-10-29
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Granted: 1978-01-24
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Expires: 1996-10-29
Abstract
Abstract A tractor-implement arrangement for establishing a frictional connection between the power take-off shaft of a tractor and a Cardan shaft for the drive of a movable implement by an automatic coupling of members respectivaly connected to the power take-off shaft and the Cardan shaft. The implement is connected to the tractor by means of automatically interengaging coupling members or elements while one and/or the other coupling element of the power take-off or Cardan shaft is axially displaceable while being spring urged. The Cardan shaft is supported by suitable holding means and is liftable by a lifting device. The Cardan shaft is moved first by guiding the same along an inclined plane toward the take-off shaft and is frictionally coupled thereto whereupon the implement is mounted on the tractor by interengagement of additional coupling members.
Inventors
- 👤 Arno Gego
- 👤 Gerhard Fussinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:37
CPC Classifications
A; A01; A01B; A01B71/00; A01B71/06; A01B71/063; B; B60; B60K; B60K17/00; B60K17/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
228 words
In the combination of a tractor and implement to be towed by said tractor, including means for connecting said tractor to said implement, a take-off shaft on said tractor having a drive coupling on its rear end, a Cardan shaft on said implement having a driven coupling on its forward end for driving engagement with said drive coupling, said Cardan shaft being extensible and including spring means to hold it resiliently extended and two pivotal joints, including a pivotal joint adjacent its forward end, connecting said driven coupling to said shaft, and a second joint adjacent said implement for vertical pivotal movement of said shaft, a guiding element pivotally connected to said tractor below said take-off shaft and inclined downwardly and rearwardly, a nonrotatable guiding shoe located on said drive coupling for rotatably supporting said driven coupling, resilient means supporting said Cardan shaft against vertical downward movement and in position for said shoe to engage said guiding element, so that said guiding element guides said shoe and driven coupling into engagement with said drive coupling when said tractor moves toward said implement for connecting to said implement, said pivotal joints being spaced on said shaft, and said resilient means supporting said Cardan shaft support said shaft against downward movement about the rearward pivotal joint and also support said driven coupling against downward movement about the forward pivotal joint.
Claim 2
Dependent Claim
228 words
In the combination of a tractor and implement to be towed by said tractor, including means for connecting said tractor to said implement, a take-off shaft on said tractor having a drive coupling on its rear end, a Cardan shaft on said implement having a driven coupling on its forward end for driving engagement with said drive coupling, said Cardan shaft being extensible and including spring means to hold it resiliently extended and two pivotal joints, including a pivotal joint adjacent its forward end, connecting said driven coupling to said shaft, and a second joint adjacent said implement for vertical pivotal movement of said shaft, a guiding element pivotally connected to said tractor below said take-off shaft and inclined downwardly and rearwardly, a nonrotatable guiding shoe located on said drive coupling for rotatably supporting said driven coupling, resilient means supporting said Cardan shaft against vertical downward movement and in position for said shoe to engage said guiding element, so that said guiding element guides said shoe and driven coupling into engagement with said drive coupling when said tractor moves toward said implement for connecting to said implement, said pivotal joints being spaced on said shaft, and said resilient means supporting said Cardan shaft support said shaft against downward movement about the rearward pivotal joint and also support said driven coupling against downward movement about the forward pivotal joint.
Claim 3
Dependent Claim
25 words
In the combination as claimed in claim 1, in which said resilient means includes a spring connected to said driven coupling to raise said coupling.
Claim 4
Dependent Claim
30 words
In the combination as claimed in claim 1, in which said guiding element is a guiding trough open at its top, and said shoe is formed complementary to said trough.
Claim 5
Dependent Claim
44 words
In the combination as claimed in claim 1, in which said tractor and implement have complementary engaging means, and said tractor includes hoisting means on said tractor to raise said engaging means on the tractor to register with the engaging means on said implement.
Claim 6
Dependent Claim
49 words
In the combination as claimed in claim 1, in which said means for connecting said tractor and implement includes vertical complementary frames on said tractor and said implement, and hoisting means on said tractor for raising said frame on said tractor to register with the frame on said implement.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |