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US3596445A Expired / Lapsed US ⏱️ 0.0 years remaining

A device for mowing crop

Assignee: Herbert Vissers BV
•
Filing: 1968-01-02
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Granted: 1971-08-03
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Expires: 1988-01-02
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Abstract

Abstract A method and a device for mowing crop according to which the crop is cutoff by one or more mowing elements and the invention has for its object to reduce the frictional resistance which the mowing elements encounter at the crop cutoff. The mowing elements cooperate with a conveying member which raises the crop and takes it up during the cutting off and discharges it after the cutting off. To this end a conveying member e.g. shaped as a rotor is provided and cooperates with the mowing elements for raising the crop and discharging it after this cutting off, so that the mowing elements do not come into contact with the crop cutoff.

Inventors

  • 👤 Theodorus Lievers
  • 👤 Herbert Vissers

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 11:57
CPC Classifications
A; A01; A01D; A01D65/00; A01D43/00; A01D43/10; A01D57/00; Y; Y10; Y10S; Y10S56/00; Y10S56/01

Claims Analysis

Total Claims: 26
Claim 1
Independent Claim 170 words
A crop-mowing device comprising a frame adapted to be moved along a path, movable driven mowing means supported by said frame, conveying means including a driven rotor supported by said frame for rotation about a transversely extending generally horizontal axis, said rotor having a portion thereof disposed directly above and forwardly of the forwardmost path of movement of said mowing means, said rotor including transversely extending projection means provided on the full length of the portion of the rotor over said forwardmost path of movement of the mowing means and which is movable in a circular path when the rotor is rotated about said axis, and driving means for driving said mowing means and said conveying means, said projection of the driven rotor being movable upwardly and forwardly at a point forwardly of the forwardmost path of movement of said mowing means to raise a crop as it is cut and which conveys the cut crop rearwardly over said mowing means to discharge the cut crop behind said mowing means.
Claim 2
Dependent Claim 170 words
A crop-mowing device comprising a frame adapted to be moved along a path, movable driven mowing means supported by said frame, conveying means including a driven rotor supported by said frame for rotation about a transversely extending generally horizontal axis, said rotor having a portion thereof disposed directly above and forwardly of the forwardmost path of movement of said mowing means, said rotor including transversely extending projection means provided on the full length of the portion of the rotor over said forwardmost path of movement of the mowing means and which is movable in a circular path when the rotor is rotated about said axis, and driving means for driving said mowing means and said conveying means, said projection of the driven rotor being movable upwardly and forwardly at a point forwardly of the forwardmost path of movement of said mowing means to raise a crop as it is cut and which conveys the cut crop rearwardly over said mowing means to discharge the cut crop behind said mowing means.
Claim 3
Dependent Claim 24 words
A device as claimed in claim 1, characterized in that said rotor at its front and at its top is enclosed by a Hood.
Claim 4
Dependent Claim 17 words
A device as claimed in claim 1, characterized in that said projection means consists of blade-shaped vanes.
Claim 5
Dependent Claim 15 words
A device as claimed in claim 1, characterized in that the projection means is yieldable.
Claim 6
Dependent Claim 22 words
A device as claimed in claim 2, characterized in that at least a portion of the hood is narrowly enclosing said rotor.
Claim 7
Dependent Claim 28 words
A device as claimed in claim 2, characterized in that at least a portion of the hood is narrowly enclosing said rotor and is adapted to yield upwards.
Claim 8
Dependent Claim 21 words
A device according to claim 1, characterized in that the rear part of the mowing means is covered by a cover.
Claim 9
Dependent Claim 39 words
A device as claimed in claim 1, characterized in that a cover covering the rear part of the mowing means extends beyond the mowing means and is downwardly inclined to below a plane in which said mowing means lie.
Claim 10
Dependent Claim 37 words
A device as claimed in claim 1, characterized in that the mowing means consists of at least one upstanding shaft driven by said driving means and carrying at least two mowing knives rotating in a lying plane.
Claim 11
Dependent Claim 52 words
A device as claimed in claim 1, characterized in that that the mowing means consists of at least two upstanding shafts, each carrying at least two rotating mowing knives, said shafts being driven in opposite direction of rotation, the ends of the knives of adjacent shafts overlapping each other during rotation thereof.
Claim 12
Dependent Claim 22 words
A device according to claim 1, characterized in that the mowing means comprises a driving gear located closely above said mowing means.
Claim 13
Dependent Claim 36 words
A device as claimed in claim 1, characterized in that a cover covering the rear part of the mowing means is joined to a part of a casing enclosing a driving gear of the mowing means.
Claim 14
Dependent Claim 31 words
A device as claimed in claim 1, characterized in that the rear of the rotor nearly contacts the front side of a casing enclosing a driving gear of the mowing means.
Claim 15
Dependent Claim 34 words
A device as claimed in claim 1, characterized in that a hood covering the conveying means at least at the top is extended to an upstanding conduit in which the crop is discharged upwards.
Claim 16
Dependent Claim 22 words
A device as claimed in claim 1, characterized in that said conveying means comprises an auxiliary conveying member arranged behind said rotor.
Claim 17
Dependent Claim 39 words
A device as claimed in claim 1, characterized in that said conveying means comprises an auxiliary conveying member arranged behind said rotor, the circumferential speed of the rotor being smaller than the circumferential speed of the auxiliary conveying member.
Claim 18
Dependent Claim 19 words
A device according to claim 1, characterized in that said conveying means comprises said rotor and an auxiliary rotor.
Claim 19
Dependent Claim 29 words
A device according to claim 1, characterized in that the conveying means comprises said rotor and an auxiliary rotor, both rotors being driven in the same direction of rotation.
Claim 20
Dependent Claim 31 words
A device as claimed in claim 17, characterized in that the rotor comprises a number of blades and that the auxiliary rotor comprises a greater number of blades than the rotor.
Claim 21
Dependent Claim 33 words
A device as claimed in claim 1, characterized in that said conveying means comprises said rotor executed as a bruising roll and an auxiliary bruising roll cooperates therewith for bruising the crop cutoff.
Claim 22
Dependent Claim 26 words
A device as claimed in claim 1, characterized in that the conveying means comprises said rotor and a pair of bruising rolls arranged behind said rotor.
Claim 23
Dependent Claim 34 words
A device as claimed in claim 1, characterized in that the conveying means comprises said rotor and an auxiliary conveying element consisting of a substantially horizontal conveying band having its upper lap moving rearwards.
Claim 24
Dependent Claim 29 words
A device as claimed in claim 1, characterized in that the circumferential speed of the rotor is at least 50 percent larger than the forward-traveling speed of the frame.
Claim 25
Dependent Claim 217 words
A crop-mowing device comprising a frame adapted to be moved along a path, movable driven mowing means supported by said frame, conveying means including a driven rotor supported by said frame for rotation about a transversely extending generally horizontal axis, said Rotor having a portion thereof disposed directly above and forwardly of the forwardmost path of movement of said mowing means, said rotor including transversely extending projection means provided on the full length of the portion of the rotor over said forwardmost path of movement of the mowing means and which is movable in a circular path when the rotor is rotated about said axis, driving means for driving said mowing means and said conveying means, said projection of the driven rotor being movable upwardly and rearwardly at the rear of the rotor, an auxiliary conveyor member spaced rearwardly of said rotor and above said mowing means, said auxiliary conveyor member spaced rearwardly of said rotor and above said mowing means, said auxiliary conveyor member comprising a band having the forward portion thereof inclined upwardly and rearwardly and being movable in an upward and rearward direction so that the cut crop passes between said rotor and said band to convey the cut crop rearwardly over the mowing means to discharge the cut crop behind said mowing means.
Claim 26
Dependent Claim 217 words
A crop-mowing device comprising a frame adapted to be moved along a path, movable driven mowing means supported by said frame, conveying means including a driven rotor supported by said frame for rotation about a transversely extending generally horizontal axis, said Rotor having a portion thereof disposed directly above and forwardly of the forwardmost path of movement of said mowing means, said rotor including transversely extending projection means provided on the full length of the portion of the rotor over said forwardmost path of movement of the mowing means and which is movable in a circular path when the rotor is rotated about said axis, driving means for driving said mowing means and said conveying means, said projection of the driven rotor being movable upwardly and rearwardly at the rear of the rotor, an auxiliary conveyor member spaced rearwardly of said rotor and above said mowing means, said auxiliary conveyor member spaced rearwardly of said rotor and above said mowing means, said auxiliary conveyor member comprising a band having the forward portion thereof inclined upwardly and rearwardly and being movable in an upward and rearward direction so that the cut crop passes between said rotor and said band to convey the cut crop rearwardly over the mowing means to discharge the cut crop behind said mowing means.

References Cited (Backward Citations)

US955019A Cited
AU152038A Cited
GB867140A Cited
FR1309749A Cited
US3233395A Cited
FR1378634A Cited
FR1407189A Cited
US3402533A Cited
US3469378A Cited
US3387612A Cited
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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) 1974-08-02 1975-02-01 1975-08-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-08-02 1979-02-01 1979-08-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-08-02 1983-02-01 1983-08-03 $7700.00 Window Closed / Lapsed

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