US4241849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cut-off pad for an air planter with seed discharge feature
Assignee: Deutz Allis Corp
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Filing: 1979-05-07
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Granted: 1980-12-30
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Expires: 1999-05-07
Abstract
Abstract A resilient air cut-off pad 52 for an air planter is provided with an area of gradually decreasing thickness in the form of a seed discharge ramp 66 which has a rounded bottom 68 aligned with the circular path of the circumferentially spaced seed pockets 47 on the seed singulating disk 33. The seeds in the pockets 47 are relieved of pressure from the resilient pad 52 by their registration with the ramp 66 as they approach the trailing edge 54 of the pad 52. This insures that the seeds drop by gravity at uniform spacing without resilient thrust being imparted thereto by the trailing edge.
Inventors
- 👤 Paul H. Harrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:13
CPC Classifications
A; A01; A01C; A01C7/00; A01C7/04; A01C7/042; A01C7/044; A01C7/046
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
246 words
An air planter of the type having a housing with a seed cavity to which bulk seed and pressurized air are supplied and a seed drop portion at the lower part thereof and a vertical seed singulating disk rotatable about a horizontal axis having a generally flat sealing face presenting circumferentially spaced seed pockets which sequentially communicate with said seed cavity and said seed drop portion when said disk is rotated in a predetermined direction, characterized by a resilient air cut-off pad of predetermined thickness in the direction parallel to the axis of said disk, said pad being interposed between said housing and disk with a trailing edge adjacent said seed drop portion, a flat sealing surface on said pad in resilient sealing engagement with the flat face of said disk whereby said seed pockets are brought into confronting relation with said sealing surface of said pad as said disk is rotated in said predetermined direction, and an area of gradually decreasing thickness in said pad beginning at said sealing surface, extending in said predetermined direction a predetermined distance and terminating at said trailing edge, said area of decreasing thickness being disposed to confront said seed pockets as said disk is rotated in said predetermined direction whereby the seeds in said pockets are substantially relieved of pressure of contact with said resilient pad as each pocket passes across said area of decreased thickness and across said trailing edge to said seed drop portion of said housing.
Claim 2
Dependent Claim
246 words
An air planter of the type having a housing with a seed cavity to which bulk seed and pressurized air are supplied and a seed drop portion at the lower part thereof and a vertical seed singulating disk rotatable about a horizontal axis having a generally flat sealing face presenting circumferentially spaced seed pockets which sequentially communicate with said seed cavity and said seed drop portion when said disk is rotated in a predetermined direction, characterized by a resilient air cut-off pad of predetermined thickness in the direction parallel to the axis of said disk, said pad being interposed between said housing and disk with a trailing edge adjacent said seed drop portion, a flat sealing surface on said pad in resilient sealing engagement with the flat face of said disk whereby said seed pockets are brought into confronting relation with said sealing surface of said pad as said disk is rotated in said predetermined direction, and an area of gradually decreasing thickness in said pad beginning at said sealing surface, extending in said predetermined direction a predetermined distance and terminating at said trailing edge, said area of decreasing thickness being disposed to confront said seed pockets as said disk is rotated in said predetermined direction whereby the seeds in said pockets are substantially relieved of pressure of contact with said resilient pad as each pocket passes across said area of decreased thickness and across said trailing edge to said seed drop portion of said housing.
Claim 3
Dependent Claim
21 words
The air planter of claim 1 wherein said predetermined distance is substantially equal to the circumferential distance between circumferentially adjacent pockets.
Claim 4
Dependent Claim
260 words
A resilient air cut-off pad for an air planter of the type having a housing with a seed cavity to which bulk seed and pressurized air are supplied and a seed drop portion at the lower part thereof and a vertical seed singulating disk rotatable about a horizontal axis in a predetermined direction having a generally flat sealing face presenting circumferentially spaced seed pockets which move in a circular path to sequentially communicate with the seed cavity and seed drop portion during a planting operation, characterized in that said pad is adapted to be interposed between said housing and said disk with a trailing edge adjacent said seed drop portion, that said pad has a resilient body of predetermined thickness and a flat sealing surface on said body adapted for sealing engagement with the flat face of said disk whereby said seed pockets are brought into confronting relation with said sealing surface of said pad as said disk is rotated in said predetermined direction that said pad has an area of gradually decreasing thickness in said predetermined direction starting at said sealing surface and terminating at said trailing edge, and that said area of decreasing thickness of said pad, when installed in said planter, being disposed to confront said seed pockets as said disk is rotated in said predetermined direction whereby the seeds in said pockets are substantially relieved of pressure of contact with said resilient pad as each pocket passes across said area of decreased thickness and across said trailing edge to said seed drop portion of said housing.
Claim 5
Dependent Claim
260 words
A resilient air cut-off pad for an air planter of the type having a housing with a seed cavity to which bulk seed and pressurized air are supplied and a seed drop portion at the lower part thereof and a vertical seed singulating disk rotatable about a horizontal axis in a predetermined direction having a generally flat sealing face presenting circumferentially spaced seed pockets which move in a circular path to sequentially communicate with the seed cavity and seed drop portion during a planting operation, characterized in that said pad is adapted to be interposed between said housing and said disk with a trailing edge adjacent said seed drop portion, that said pad has a resilient body of predetermined thickness and a flat sealing surface on said body adapted for sealing engagement with the flat face of said disk whereby said seed pockets are brought into confronting relation with said sealing surface of said pad as said disk is rotated in said predetermined direction that said pad has an area of gradually decreasing thickness in said predetermined direction starting at said sealing surface and terminating at said trailing edge, and that said area of decreasing thickness of said pad, when installed in said planter, being disposed to confront said seed pockets as said disk is rotated in said predetermined direction whereby the seeds in said pockets are substantially relieved of pressure of contact with said resilient pad as each pocket passes across said area of decreased thickness and across said trailing edge to said seed drop portion of said housing.
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) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |