US3586004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor knife attachment
Assignee: Case LLC
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Filing: 1969-10-08
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Granted: 1971-06-22
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Expires: 1989-10-08
Abstract
Abstract A threshing machine having an elongated threshing cylinder through which crops are axially fed. A rotor mounted within the threshing cylinder having impeller blades at the grain entry end. The impeller blades have a flat planar portion, a scoop portion including a sweptback leading edge, and detachable rotary knife members. The rotary knife members can work by themself or in conjunction with the stationary knife carried by the threshing cylinder.
Inventors
- 👤 Richard A De Pauw
- 👤 William H Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:38
CPC Classifications
A; A01; A01F; A01F7/00; A01F7/02; A01F7/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
229 words
In an axial flow combine having a tubular casing formed about a fore and aft axis, and end wall partially closing the forward end of said tubular casing, said end wall having an upper horizontal edge located above said fore and aft axis, a generally horizontal feed plate extending forwardly from said upper horizontal edge, a rotary beater mounted over said horizontal feed plate and functioning to feed material into the forward end of said tubular casing, an elongated rotor having a hub journaled for rotation about said fore and aft axis within said tubular casing, impeller blades secured to the forward end of said hub, means for driving said rotor in a given direction, each impeller blade including: a flat planar portion extending axially of said elongated rotor, said flat planar portion having a radially extending leading edge terminating at a point below said horizontal feed plate and an outer edge diverging rearwardly with respect to said axis, a scoop portion joined to said flat planar portion along said outer edge and protruding into said given direction, said scoop portion including a sweptback edge that intersects with said radially extending leading edge, a first rotary knife member having a sharp leading edge, and means for detachably connecting said first rotary knife member to a scoop portion such that said sharp leading edge is forward of said sweptback edge.
Claim 2
Dependent Claim
229 words
In an axial flow combine having a tubular casing formed about a fore and aft axis, and end wall partially closing the forward end of said tubular casing, said end wall having an upper horizontal edge located above said fore and aft axis, a generally horizontal feed plate extending forwardly from said upper horizontal edge, a rotary beater mounted over said horizontal feed plate and functioning to feed material into the forward end of said tubular casing, an elongated rotor having a hub journaled for rotation about said fore and aft axis within said tubular casing, impeller blades secured to the forward end of said hub, means for driving said rotor in a given direction, each impeller blade including: a flat planar portion extending axially of said elongated rotor, said flat planar portion having a radially extending leading edge terminating at a point below said horizontal feed plate and an outer edge diverging rearwardly with respect to said axis, a scoop portion joined to said flat planar portion along said outer edge and protruding into said given direction, said scoop portion including a sweptback edge that intersects with said radially extending leading edge, a first rotary knife member having a sharp leading edge, and means for detachably connecting said first rotary knife member to a scoop portion such that said sharp leading edge is forward of said sweptback edge.
Claim 3
Dependent Claim
24 words
The invention as set forth in claim 1 wherein said sharp leading edge lies in a plane normal to said fore and aft axis.
Claim 4
Dependent Claim
59 words
The invention as set forth in claim 2 wherein a stationary blade is secured to said end wall adjacent said upper horizontal edge, said stationary blade having a cutting edge lying in a plane normal to said fore and aft axis in cooperative shearing relationship with said first rotary knife member to thus cut the incoming material into lengths.
Claim 5
Dependent Claim
26 words
The invention as set forth in claim 1 wherein a second rotary knife member is secured to said impeller blade along said radially extending leading edge.
Claim 6
Dependent Claim
24 words
The invention as set forth in claim 4 wherein said sharp leading edge lies in a plane normal to said fore and aft axis.
Claim 7
Dependent Claim
60 words
The invention as set forth in claim 5 wherein a stationary blade is secured to said end wall adjacent said upper horizontal edge, said stationary blade having a cutting edge lying in a plane normal to said fore and aft axis in cooperative relationship to said first and second rotary knife members to thus cut the incoming material into lengths.
References Cited (Backward Citations)
US2731995A
Cited
US2385451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |