Patent DE486121C successfully refreshed from Google Patents.
US4199922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mowing machine
Assignee: C Van der Lely NV
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Filing: 1978-08-03
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Granted: 1980-04-29
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Expires: 1998-08-03
Abstract
Abstract A mowing machine adapted to be connected to a three-point lifting device of a tractor and powered by a power take-off therefrom, the mowing machine extending laterally to the side of the tractor and having two mowing assemblies, each of which includes a rotor which is powered by a gear chain and belts from the power take-off and is mounted by bearings to rotate about a substantially vertical axis which also contains a stationary shaft having the same longitudinal axis as the axis of rotation of the rotor. The vertical stationary shaft has a non-rotatable ring gear at its lower aspect which is surrounded by the rotor which, by a cover plate on its underside supports spur gears which mesh with the ring gear and also cutting elements, the arrangement being that the cutting elements rotate much faster than the rotor and are caused to rotate by the meshing of their individual spur gears with the ring gear. The rotor rotates in one direction whereby crop is guided between the two rotors of the two assemblies to form a windrow and the cutting elements rotate in the opposite direction to cut the crop, the latter rotation being at least twice and preferably 8 to 10 times faster than the rotation of the rotor. Supporting dishes for supporting the cutting elements the desired height above the ground may be connected under the rotating members or at the side thereof. Arcuate segments extend from the underlying cover plate to protect the rotating cutting elements.
Inventors
- 👤 Cornelis van der Lely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:25
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/64; A01D34/66
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
76 words
A mowing machine comprising at least one mowing assembly which includes a rotor mounted in said assembly for rotation about a substantially vertical main axis and which carries at least one mowing element, at least one cutting member provided on said mowing element, said mowing element being rotatable about a further vertical axis which is spaced from said main axis, said rotor comprising a rim located proximate said mowing element, said rim having a non-circular circumference.
Claim 2
Dependent Claim
76 words
A mowing machine comprising at least one mowing assembly which includes a rotor mounted in said assembly for rotation about a substantially vertical main axis and which carries at least one mowing element, at least one cutting member provided on said mowing element, said mowing element being rotatable about a further vertical axis which is spaced from said main axis, said rotor comprising a rim located proximate said mowing element, said rim having a non-circular circumference.
Claim 3
Dependent Claim
18 words
A mowing machine as claimed in claim 1, in which said rim comprises an outwardly projecting screening plate.
Claim 4
Dependent Claim
21 words
A mowing machine as claimed in claim 2, in which said screening plate provides a protective cover for said mowing element.
Claim 5
Dependent Claim
19 words
A mowing machine as claimed in claim 3, in which the circumference of said screening plate is arcuate shaped.
Claim 6
Dependent Claim
18 words
A mowing machine as claimed in claim 4, in which said rim comprised at least two screening plates.
Claim 7
Dependent Claim
20 words
A mowing machine as claimed in claim 1, in which said rim comprises part of the underside of said rotor.
Claim 8
Dependent Claim
24 words
A mowing machine as claimed in claim 1, in which a separate supporting member is provided for supporting said mowing element on the ground.
Claim 9
Dependent Claim
71 words
A mowing machine comprising at least one mowing assembly which includes a rotor mounted for rotation about a substantially vertical main axis and which carries at least one mowing element, said mowing element being provided with at least one cutting member and being rotatable about a further substantially vertical axis which is spaced from said main axis, a separate supporting member being provided for supporting said mowing element on the ground.
Claim 10
Dependent Claim
71 words
A mowing machine comprising at least one mowing assembly which includes a rotor mounted for rotation about a substantially vertical main axis and which carries at least one mowing element, said mowing element being provided with at least one cutting member and being rotatable about a further substantially vertical axis which is spaced from said main axis, a separate supporting member being provided for supporting said mowing element on the ground.
Claim 11
Dependent Claim
73 words
A mowing machine as claimed in claim 8, in which said mowing assembly comprises at least one further mowing element whereby it includes at least two mowing elements each of which is mounted for rotation about a separate further substantially vertical axis spaced from said main axis, said further axes being disposed on a circle centered on said main axis, supporting members being provided for supporting each said mowing element on the ground.
Claim 12
Dependent Claim
23 words
A mowing machine as claimed in claim 9, in which each said supporting member is located vertically below a respective said mowing element.
Claim 13
Dependent Claim
33 words
A mowing machine as claimed in claim 10, in which each said supporting member is connected with a shaft having a longitudinal axis coincident with said further axis of the respective mowing element.
Claim 14
Dependent Claim
29 words
A mowing machine as claimed in claim 11, in which each said supporting member is convex and circular as viewed in a direction parallel to the corresponding said shaft.
Claim 15
Dependent Claim
24 words
A mowing machine as claimed in claim in which each said mowing element comprises a carrier on which said cutting member is pivotally secured.
Claim 16
Dependent Claim
62 words
A mowing machine having a substantially vertical main axis and comprising housing means which rotates about said main axis, said housing means mounting a mowing element for rotation about a further substantially vertical axis which is spaced from said main axis, said mowing element comprising a rotary carrier and a cutting member which is pivotally secured to the top of said carrier.
Claim 17
Dependent Claim
62 words
A mowing machine having a substantially vertical main axis and comprising housing means which rotates about said main axis, said housing means mounting a mowing element for rotation about a further substantially vertical axis which is spaced from said main axis, said mowing element comprising a rotary carrier and a cutting member which is pivotally secured to the top of said carrier.
Claim 18
Dependent Claim
30 words
A mowing machine as claimed in claim 14, in which said mowing element is provided a further cutting member which is secured thereto diametrically opposite said first mentioned cutting member.
Claim 19
Dependent Claim
30 words
A mowing machine as claimed in claim 14, in which said cutting member is disposed whereby approximately one-half of its length is disposed within the periphery of its said carrier.
Claim 20
Dependent Claim
21 words
A mowing machine as claimed in claim 16, in which said cutting member is freely pivotable and capable of pivoting 360°.
Claim 21
Dependent Claim
36 words
A mowing machine as claimed in claim 14, in which said mowing assembly cooperates with a second mowing assembly similar to said first mentioned assembly whereby, in operation, said two mowing assemblies rotate in opposite senses.
Claim 22
Dependent Claim
39 words
A mowing machine as claimed in claim 14, in which the speed of rotation of said mowing assembly is about 500 revolutions per minute and the speed of rotation of said mowing element is about 5000 revolutions per minute.
Claim 23
Dependent Claim
20 words
A mowing machine as claimed in claim 14, in which said mowing element is constructed to cut with scything action.
Claim 24
Dependent Claim
24 words
A mowing machine as claimed in claim 14, which is provided with means for attaching it to the three-point lifting device of a tractor.
Claim 25
Dependent Claim
20 words
A mowing machine as claimed in claim 19, in which the working width of the machine is about 1.6 meters.
Claim 26
Dependent Claim
26 words
A mowing machine as claimed in claim 19, which is provided with means whereby it can be driven from the power take-off shaft of the tractor.
Claim 27
Dependent Claim
66 words
A mowing machine comprising a mowing assembly which is mounted for rotation about a substantially vertical extending main axis and which carries a mowing element mounted for rotation about a further substantially vertical axis spaced from said main axis, said assembly including a rotatable casing, said mowing element being drivable by said casing, a wall included in said casing which is inclined to said main axis.
Claim 28
Dependent Claim
66 words
A mowing machine comprising a mowing assembly which is mounted for rotation about a substantially vertical extending main axis and which carries a mowing element mounted for rotation about a further substantially vertical axis spaced from said main axis, said assembly including a rotatable casing, said mowing element being drivable by said casing, a wall included in said casing which is inclined to said main axis.
Claim 29
Dependent Claim
25 words
A mowing machine as claimed in claim 24, in which said casing comprises an outer surface which is, at least in part, conical in shape.
Claim 30
Dependent Claim
40 words
A mowing machine as claimed in claim 25, in which said part of said outer surface of said casing has the shape of a truncated cone, the vertex of which is spaced above said mowing assembly on said main axis.
Claim 31
Dependent Claim
56 words
A mowing machine as claimed in claim 26, in which said casing is provided with an underlying housing having a further conical outer surface which has a larger cone angle than the first-mentioned conical surface of said casing, said casing and housing rigidly connected together and forming a rotor, said mowing element mounted in said housing.
Claim 32
Dependent Claim
27 words
A mowing machine as claimed in claim 27, in which said housing has a cylindrical outer surface disposed between a lower rim and said outer conical surface.
Claim 33
Dependent Claim
17 words
A machine as claimed in claim 21, in which said rim extends in a substantially horizontal direction.
Claim 34
Dependent Claim
57 words
A mowing machine as claimed in claim 24, in which said main axis in coincident with the longitudinal axis of a main shaft which extends through a spur gear located above said mowing assembly, said main shaft being rigidly secured to the top side of a gear box mounted on said assembly which accommodates said spur gear.
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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) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |