Patent US3561789A successfully refreshed from Google Patents.
US3561789A
Expired / Lapsed
US
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Tractor hitch
Assignee: Deutz Allis Corp
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Filing: 1968-11-22
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Granted: 1971-02-09
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Expires: 1988-11-22
Abstract
Abstract A powerized three-point hitch carrying a hitch adapter for quick hitching to an implement. The three-point hitch is powered by any suitable means to provide horizontal and vertical movement of the hitch adapter.
Inventors
- 👤 Larry F Stikeleather
- 👤 Craig W Cannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:39
CPC Classifications
A; A01; A01B; A01B59/00; A01B59/06; A01B59/061; A01B59/062; A01B63/00; A01B63/02; A01B63/10; A01B63/118; A01B63/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
160 words
A vehicle three-point hitching means, including a powered upper link adapted for connection to the tractor and having power means for extension and contraction of the link, a pair of powered lower draft arms adapted for connection to the tractor having power means for raising and lowering the draft arms, a hitch adapter pivotally connected to the rearward ends of said upper link and said draft arms including: an upper hook connected to the upper portion of said adapter for engaging a crosspin in the mast of an implement; two lower hooks connected to the lower portion of said adapter for engaging crossbars in the lower portion of the mast of an implement; a source of power connected to the power means of said link and said arms; control means intermediate said source of power and the power means on said link and said arms to thereby move said hitch adapter to extend, Withdraw, raise and lower said hitch adapter.
Claim 2
Dependent Claim
160 words
A vehicle three-point hitching means, including a powered upper link adapted for connection to the tractor and having power means for extension and contraction of the link, a pair of powered lower draft arms adapted for connection to the tractor having power means for raising and lowering the draft arms, a hitch adapter pivotally connected to the rearward ends of said upper link and said draft arms including: an upper hook connected to the upper portion of said adapter for engaging a crosspin in the mast of an implement; two lower hooks connected to the lower portion of said adapter for engaging crossbars in the lower portion of the mast of an implement; a source of power connected to the power means of said link and said arms; control means intermediate said source of power and the power means on said link and said arms to thereby move said hitch adapter to extend, Withdraw, raise and lower said hitch adapter.
Claim 3
Dependent Claim
36 words
A three-point vehicle hitching means as set forth in claim 1 wherein the source of power comprises a source of pressurized fluid and the power means in said link and said draft arms comprise fluid actuators.
Claim 4
Dependent Claim
44 words
A three-point vehicle hitching means as set forth in claim 1 wherein the source of power comprises a source of electrical energy and power means in said link and said draft arms comprise electrical motors to thereby provide power for moving said hitch adapter.
Claim 5
Dependent Claim
39 words
A vehicle three-point hitching means as set forth in claim 1 wherein said source of power comprise the engine and said power means in said link and said draft arms include a mechanical means driven mechanically from said engine.
Claim 6
Dependent Claim
50 words
A vehicle three-point hitching means as set forth in claim 1 wherein the control means for operating the power means in the link and draft arms include manual controls positioned on the tractor to eliminate the need for the operator to dismount from the tractor in operating the hitching means.
Claim 7
Dependent Claim
75 words
A vehicle three-point hitching means as set forth in claim 1 wherein the hitch adapter includes means pivotally connecting the rearward ends of the upper link and lower draft arms, and means connecting the hooks for extending rearwardly from points adjacent said pivotal connections with said upper link and said lower draft arms, said lower hooks including latching means to lock the crossbars on said implement mast in the hooks once the crossbars are engaged.
Claim 8
Dependent Claim
52 words
A vehicle three-point hitching means as set forth in claim 1 wherein said power means operating the draft arms comprise manually controlled power actuators to permit a lowering and raising of the draft arms to automatically engage and latch an implement once the implement is in substantial alignment with the hitch adapter.
Claim 9
Dependent Claim
79 words
A vehicle three-point hitching means as set forth in claim 1 wherein said power means operating said draft arms include power actuators, said power means operating said upper link includes a double-acting power actuator, said control means include manually controlled means to provide control for power retraction of the upper link to draw the implement toward the vehicle while the lower draft arms pivotally support the hitch adapter to maintain the upright position on the implement during this movement.
Claim 10
Dependent Claim
32 words
A vehicle three-point hitching means as set forth in claim 1 wherein said upper link includes a double-action power actuator with a length indicator to show the length of said upper link.
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |