US3709304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sway arrestor for a three point hitch
Assignee: Deutz Allis Corp
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Filing: 1970-12-28
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Granted: 1973-01-09
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Expires: 1990-12-28
Abstract
Abstract A three point hitch sway arrestor for limiting the lateral sway of the lower draft arms when they are disconnected from an implement and raised to the transport position on the tractor.
Inventors
- 👤 R Haupt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:11
CPC Classifications
A; A01; A01B; A01B59/00; A01B59/04; A01B59/041
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
119 words
A sway limiting device for use with a vehicle three point hitch comprising, a pair of rock arms, a pair of lower draft arms, connecting means adapted for universally connecting said lower draft arms to a vehicle, a single lift link connected between each one of said rock arms and its mating lower draft arm, inner sway limiting means between said draft arms limiting the inward sway of said draft arms, cam means defining a curved surface in spaced relation rearwardly from said connection and outwardly of each of said lower draft arms to thereby engage said arms and cam inwardly and confine said lower draft arms to a laterally confined movement when said draft arms are pivotally raised.
Claim 2
Dependent Claim
119 words
A sway limiting device for use with a vehicle three point hitch comprising, a pair of rock arms, a pair of lower draft arms, connecting means adapted for universally connecting said lower draft arms to a vehicle, a single lift link connected between each one of said rock arms and its mating lower draft arm, inner sway limiting means between said draft arms limiting the inward sway of said draft arms, cam means defining a curved surface in spaced relation rearwardly from said connection and outwardly of each of said lower draft arms to thereby engage said arms and cam inwardly and confine said lower draft arms to a laterally confined movement when said draft arms are pivotally raised.
Claim 3
Dependent Claim
43 words
A sway limiting device for use with a vehicle three point hitch as set forth in claim 1 wherein said cam means defines said surface divergent outwardly and downwardly for camming said lower draft arms inwardly when said draft arms are pivotally raised.
Claim 4
Dependent Claim
51 words
A sway limiting device for use with a vehicle three point hitch as set forth in claim 1 wherein said cam means defines said surface positioned upwardly and rearwardly of said connecting means to thereby permit lateral sway of the draft arms when said draft arms are in the lowered position.
Claim 5
Dependent Claim
55 words
A sway limiting device for use in a vehicle three point hitch as set forth in claim 1 wherein said inner sway limiting means includes hanger bracket means inward of said draft arms, said hanger bracket means including sway blocks limiting the inward sway of said draft arms when said draft arms are pivotally raised.
Claim 6
Dependent Claim
46 words
A sway limiting device for use with a vehicle three point hitch as set forth in claim 4 wherein said sway blocks define a substantially vertical surface to thereby confine the vertical movement of the draft arms substantially between said cam means and said sway blocks.
Claim 7
Dependent Claim
47 words
A sway limiting device for use with a vehicle three point hitch as set forth in claim 1 wherein said connecting means defines a ball and socket permitting said lower draft arms to pivot laterally in their lower position and to move to a pivotally raised position.
Claim 8
Dependent Claim
70 words
A sway limiting device for use in a vehicle three point hitch as set forth in claim 1 wherein said inner sway limiting means means includes a draw bar hanger bracket positioned intermediate said draft arms, sway blocks removably fastened to said hanger bracket defining a substantially vertical surface to limit the lateral inward swaying movement of said draft arms when said draft arms are pivoted to the raised position.
Claim 9
Dependent Claim
65 words
A sway limiting device for use in a vehicle three point hitch as set forth in claim 1 wherein said cam means defines said curved surface converging inwardly and upwardly and supporting means supporting said cam means defining a substantially vertical surface continuous with said curved surface extending upwardly to confine said draft arms to a substantially vertical movement when said draft arms are raised.
Claim 10
Dependent Claim
42 words
A sway limiting device for use in a vehicle three point hitch as set forth in claim 1 including means positioning said cam means for engaging the forward portion of each of said draft arms when said draft arms are pivotally raised.
Claim 11
Dependent Claim
60 words
A sway limiting device for use with a vehicle three point hitch as set forth in claim 1 including journal means for supporting a torsion bar, means connecting said lower draft arms eccentrically to said torsion bar, means fastening said cam means to said journal means to thereby cam said lower draft arms inwardly when said draft arms are raised.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |