Patent US4538688A successfully refreshed from Google Patents.
US4538688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluted coulter blade
Assignee: MARCHESAN Corp
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Filing: 1984-03-02
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Granted: 1985-09-03
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Expires: 2004-03-02
Abstract
Abstract Disclosed herein is a fluted coulter disc blade with a circumferential cutting edge portion, flutes circumferentially spaced apart around the disc and having a radially and axially tapered configuration, notches in the peripheral cutting edge portion, and circumferential openings through the flutes.
Inventors
- 👤 Robert J. Szucs
- 👤 Sandra M. McNicholas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:46
CPC Classifications
A; A01; A01B; A01B15/00; A01B15/18; A01B15/16
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
66 words
An improved coulter blade comprising a disc plate body having a radially tapered circumferentially straight cutting edge portion on the peripheral extremity thereof, flutes circumferentially spaced apart around said plate, said flutes being radially elongated and positioned radially inwardly from said cutting edge portion, said flutes being axially and circumferentially diminishingly tapered along substantially the entire length thereof to be smaller toward said cutting edge portion.
Claim 2
Dependent Claim
66 words
An improved coulter blade comprising a disc plate body having a radially tapered circumferentially straight cutting edge portion on the peripheral extremity thereof, flutes circumferentially spaced apart around said plate, said flutes being radially elongated and positioned radially inwardly from said cutting edge portion, said flutes being axially and circumferentially diminishingly tapered along substantially the entire length thereof to be smaller toward said cutting edge portion.
Claim 3
Dependent Claim
24 words
An improved coulter blade as defined in claim 1 wherein said flute are radially tapered along the length thereof toward said cutting edge portion.
Claim 4
Dependent Claim
27 words
An improved coulter blade as defined in claim 1 wherein said flutes have the radially outward extremity thereof adjacent the inward side of said cutting edge portion.
Claim 5
Dependent Claim
29 words
An improved coulter blade as defined in claim 1 wherein said flutes have the radially outward extremity thereof spaced inwardly from the inward side of said cutting edge portion.
Claim 6
Dependent Claim
23 words
An improved coulter blade as defined in claim 1 wherein said cutting edge portion has radial notches therethrough at circumferentially spaced apart positions.
Claim 7
Dependent Claim
22 words
An improved coulter blade as defined in claim 5 wherein said notches have a circumferential length greater than the radial depth thereof.
Claim 8
Dependent Claim
25 words
An improved coulter blade as defined in claim 5 wherein said notches have circumferential length to radial depth ratio of three to one or greater.
Claim 9
Dependent Claim
19 words
An improved coulter blade as defined in claim 1 wherein said flutes are arcuately shaped in the radial direction.
Claim 10
Dependent Claim
24 words
An improved coulter blade as defined in claim 8 wherein said flutes are radially tapered along the length thereof toward said cutting edge portion.
Claim 11
Dependent Claim
27 words
An improved coulter blade as defined in claim 8 wherein said flutes have the radially outward extremity thereof adjacent the inward side of said cutting edge portion.
Claim 12
Dependent Claim
29 words
An improved coulter blade as defined in claim 8 wherein said flutes have the radially outward extremity thereof spaced inwardly from the inward side of said cutting edge portion.
Claim 13
Dependent Claim
23 words
An improved coulter blade as defined in claim 8 wherein said cutting edge portion has radial notches therethrough at circumferentially spaced apart positions.
Claim 14
Dependent Claim
22 words
An improved coulter blade as defined in claim 8 wherein said notches have a circumferential length greater than the radial depth thereof.
Claim 15
Dependent Claim
25 words
An improved coulter blade as defined in claim 8 wherein said notches have circumferential length to radial depth ratio of three to one or greater.
Claim 16
Dependent Claim
25 words
An improved coulter blade as defined in claim 1 wherein said flutes are radially tapered along the length thereof toward the center of said plate.
Claim 17
Dependent Claim
27 words
An improved coulter blade as defined in claim 15 wherein said flutes have the radially outward extremity thereof adjacent the inward side of said cutting edge portion.
Claim 18
Dependent Claim
29 words
An improved coulter blade as defined in claim 15 wherein said flutes have the radially outward extremity thereof spaced inwardly from the inward side of said cutting edge portion.
Claim 19
Dependent Claim
23 words
An improved coulter blade as defined in claim 15 wherein said cutting edge portion has radial notches therethrough at circumferentially spaced apart positions.
Claim 20
Dependent Claim
22 words
An improved coulter blade as defined in claim 15 wherein said notches have a circumferential length greater than the radial depth thereof.
Claim 21
Dependent Claim
25 words
An improved coulter blade as defined in claim 15 wherein said notches have circumferential length to radial depth ratio of three to one or greater.
Claim 22
Dependent Claim
16 words
An improved coulter blade as defined in claim 15 wherein said flutes have openings circumferentially therethrough.
Claim 23
Dependent Claim
27 words
An improved coulter blade as defined in claim 15 wherein said flutes have the radially outward extremity thereof adjacent the inward side of said cutting edge portion.
Claim 24
Dependent Claim
29 words
An improved coulter blade as defined in claim 15 wherein said flutes have the radially outward extremity thereof spaced inwardly from the inward side of said cutting edge portion.
Claim 25
Dependent Claim
23 words
An improved coulter blade as defined in claim 15 wherein said cutting edge portion has radial notches therethrough at circumferentially spaced apart positions.
Claim 26
Dependent Claim
22 words
An improved coulter blade as defined in claim 15 wherein said notches have a circumferential length greater than the radial depth thereof.
Claim 27
Dependent Claim
25 words
An improved coulter blade as defined in claim 15 wherein said notches have circumferential length to radial depth ratio of three to one or greater.
Claim 28
Dependent Claim
23 words
An improved coulter blade as defined in claim 1 wherein said flute axial taper is in the range of 14 to 21 degrees.
Claim 29
Dependent Claim
23 words
An improved coulter blade as defined in claim 4 wherein said flute axial taper is in the range of 14 to 21 degrees.
Claim 30
Dependent Claim
23 words
An improved coulter blade as defined in claim 8 wherein said flute axial taper is in the range of 14 to 21 degrees.
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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) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |