Patent US4236724A successfully refreshed from Google Patents.
US4236724A
Expired / Lapsed
US
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Stabilizer for tractor hitch
Assignee: Case LLC
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Filing: 1978-12-01
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Granted: 1980-12-02
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Expires: 1998-12-01
Abstract
Abstract Device for stabilizing the lower links of a three-point hitch conventionally used on farm tractors having a sway bar rotatable connected to the tractor axle by a first pin with its axis paralled to the longitudinal axis of the axle. The other end of the sway bar is connected to one of the lower links by a second pin encased in a rubber metal element and oriented with its axis transverse to the first pin axis.
Inventors
- 👤 Dieter Schillings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:32
CPC Classifications
A; A01; A01B; A01B59/00; A01B59/04; A01B59/041; B; B60; B60D; B60D1/00; B60D1/24; B60D1/42; B60D1/46; B60D1/465
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
146 words
A stabilizer for the lower link of a tractor hitch comprising: a stabilizer bar pivotally connected to said tractor; a bore in said stabilizer bar; an annular sleeve defining inwardly projecting collars inserted in said bore; a duct formed adjacent said bore; an inwardly drawn torus formed in said sleeve complementary to said duct; a clamping pin positioned within and engageable with both said duct and said torus to clamp said sleeve to said stabilizer; a cylindrical bushing extending through said sleeve and projecting beyond each side thereof; a rubber element carried between and conforming to said sleeve and said bushing; a pair of plates attached to said link and spaced apart a distance substantially equal to the length of said bushing; and a pin insertable through said plates and said bushing to effect an articulation and pivotal connection between said link and said stabilizer bar.
Claim 2
Dependent Claim
146 words
A stabilizer for the lower link of a tractor hitch comprising: a stabilizer bar pivotally connected to said tractor; a bore in said stabilizer bar; an annular sleeve defining inwardly projecting collars inserted in said bore; a duct formed adjacent said bore; an inwardly drawn torus formed in said sleeve complementary to said duct; a clamping pin positioned within and engageable with both said duct and said torus to clamp said sleeve to said stabilizer; a cylindrical bushing extending through said sleeve and projecting beyond each side thereof; a rubber element carried between and conforming to said sleeve and said bushing; a pair of plates attached to said link and spaced apart a distance substantially equal to the length of said bushing; and a pin insertable through said plates and said bushing to effect an articulation and pivotal connection between said link and said stabilizer bar.
Claim 3
Dependent Claim
29 words
In a stabilizer according to claim 1, wherein said inwardly projecting collars are spaced from said cylindrical bushing so that contact therebetween serves to limit their relative angular displacement.
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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) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |