US3630291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc harrow
Assignee: Kewanee Machinery and Conveyor Co
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Filing: 1970-06-18
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Granted: 1971-12-28
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Expires: 1990-06-18
Abstract
Abstract A disc harrow including a generally rectangular frame structure having front and rear pairs of disc gangs supported thereon, the front disc gangs having intermediate portions supported for longitudinal sliding movement and inner ends connected to a common connecting pin movable longitudinally of the frame structure, the rear disc gangs including intermediate portions pivotally connected to the frame structure adjacent the rearward corners thereof and inner end portions having elongated slots receiving a common connecting pin movable longitudinally of the harrow, and adjustment means associated with each of the connecting pins for selective movement thereof to vary the angular relationship between the disc gangs and the longitudinal axis of the harrow.
Inventors
- 👤 George E Womble
- 👤 Lorrin H Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:54
CPC Classifications
A; A01; A01B; A01B21/00; A01B21/08; A01B21/083
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
239 words
A disc harrow comprising, in combination, a generally rectangular frame structure including spaced side frame members and a frame portion disposed intermediate said side frame members, pairs of front and rear disc gangs operatively associated with said frame structure on generally opposite sides of said intermediate frame portion, said pairs of disc gangs having disc blades mounted thereon for engagement with the ground, a front connecting pin supported by said intermediate frame portion for movement longitudinally of said frame structure, said pair of front gang bars having inner end portions connected to said front connecting pin for movement therewith and having their intermediate length portions supported for lengthwise movement relative to said side frame members, a rear connecting pin supported by said intermediate frame portion for movement in a direction longitudinally of said frame structure, said rear pair of gang bars including inner end portions having elongated slots receiving said rear connecting pin therethrough for sliding movement within said slots, each of said rear disc gangs being pivotally secured along its length to one of said side frame members such that movement of said rear connecting pin effects a change in the angular relation of said rear disc gangs bars relative to the longitudinal axis of said frame structure but does not effect lengthwise movement of said rear disc gangs relative to said side frame member, and means for effecting selective movement of said forward and rear connecting pins.
Claim 2
Dependent Claim
239 words
A disc harrow comprising, in combination, a generally rectangular frame structure including spaced side frame members and a frame portion disposed intermediate said side frame members, pairs of front and rear disc gangs operatively associated with said frame structure on generally opposite sides of said intermediate frame portion, said pairs of disc gangs having disc blades mounted thereon for engagement with the ground, a front connecting pin supported by said intermediate frame portion for movement longitudinally of said frame structure, said pair of front gang bars having inner end portions connected to said front connecting pin for movement therewith and having their intermediate length portions supported for lengthwise movement relative to said side frame members, a rear connecting pin supported by said intermediate frame portion for movement in a direction longitudinally of said frame structure, said rear pair of gang bars including inner end portions having elongated slots receiving said rear connecting pin therethrough for sliding movement within said slots, each of said rear disc gangs being pivotally secured along its length to one of said side frame members such that movement of said rear connecting pin effects a change in the angular relation of said rear disc gangs bars relative to the longitudinal axis of said frame structure but does not effect lengthwise movement of said rear disc gangs relative to said side frame member, and means for effecting selective movement of said forward and rear connecting pins.
Claim 3
Dependent Claim
45 words
A disc harrow as defined in claim 1 wherein each of said rear disc gangs is pivotally connected along its length to one of said side frame members through adjustable means for lengthwise adjustment of the rear gang bars relative to said side frame members.
Claim 4
Dependent Claim
48 words
A disc harrow as defined in claim 1 wherein said intermediate frame portion includes means defining guide tracks for said front and rear connecting pins, said guide track defining means allowing movement of said front and rear connecting pins only in a direction longitudinally of said frame structure.
Claim 5
Dependent Claim
52 words
A disc harrow as defined in claim 1 wherein said means for effecting selective movement of said forward and rear connecting pins includes angling jack means operatively associated with each of said front and rear connecting pins and adapted to effect selective movement of said connecting pins longitudinally of said frame structure.
Claim 6
Dependent Claim
46 words
A disc harrow as defined in claim 1 including wheel means supported by said frame structure and movable between first positions operative to engage the ground and lift the disc blades above the ground, and second positions allowing engagement of said disc blades with the ground.
Claim 7
Dependent Claim
42 words
A disc harrow as defined in claim 1 whereiN said intermediate frame portion is disposed centrally between said side frame members and includes means supporting said front and rear connecting pins in generally normal relation to the plane of said frame structure.
Claim 8
Dependent Claim
33 words
A disc harrow as defined in claim 6 wherein said means for effecting movement of said front and rear connecting pins includes angling jack means operatively associated with each of said connecting pins.
Claim 9
Dependent Claim
44 words
A disc harrow as defined in claim 7 including adjustable means pivotally interconnecting each of said rear disc gangs to its associated side frame member, said adjustable means being adapted to effect lengthwise movement of said rear disc gangs relative to said frame members.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |