US3577870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mowing machines
Assignee: C Van der Lely NV
•
Filing: 1967-09-14
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Granted: 1971-05-11
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Expires: 1987-09-14
Abstract
Abstract A mowing machine for attachment laterally of a tractor wherein at the side of the mowing elements, viewed in the direction of travel approximately at the same level as the front side of the mowing elements, the mowing machine is supported from the ground so that, in operation, the mowing machine is pivotally connected with the tractor by means of a pivotal shaft extending approximately at right angles to the direction of travel. The mowing machine is pivotally connected to a lateral portion of the shaft for pivotal movement about an axis extending generally in the direction of travel.
Inventors
- 👤 Der Lely C Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:53
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/64; A01D34/66
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
118 words
A mowing machine for mowing grass and the like on a strip of land laterally of a tractor, said machine comprising a plurality of adjacent mowing elements rotatable about substantially veRtical axes, said machine being pivotally connected to the tractor through a pivotal means, said pivotal means extending approximately at right angles to the direction of travel and said machine being located laterally of the tractor, said tractor having a three-point lifting device and said pivotal means being pivotally coupled with the lower two arms of said lifting device, the upper arm of said lifting device being connected to said pivotal means through resilient means which resists excessive turning movements of said mowing elements relative to said tractor.
Claim 2
Dependent Claim
118 words
A mowing machine for mowing grass and the like on a strip of land laterally of a tractor, said machine comprising a plurality of adjacent mowing elements rotatable about substantially veRtical axes, said machine being pivotally connected to the tractor through a pivotal means, said pivotal means extending approximately at right angles to the direction of travel and said machine being located laterally of the tractor, said tractor having a three-point lifting device and said pivotal means being pivotally coupled with the lower two arms of said lifting device, the upper arm of said lifting device being connected to said pivotal means through resilient means which resists excessive turning movements of said mowing elements relative to said tractor.
Claim 3
Dependent Claim
57 words
The machine of claim 1, wherein said resilient means includes an inclined support one end of which is connected to a shaft, the other end of said inclined support being connected to a slidable block, said block being slideably fitted on a rod and spring means on said rod to bias said block in a neutral position.
Claim 4
Dependent Claim
51 words
A mowing machine as claimed in claim 1, wherein said machine comprises two mowing elements adapted to rotate about two substantially vertical shafts journaled in a frame beam extending transversely of the direction of travel, and said frame beam is supported by support means which extends in the direction of travel.
Claim 5
Dependent Claim
33 words
A mowing machine as claimed in claim 3, wherein said support means is located, at least in part, a given distance in front of the mowing circle defined by said rotatable mowing elements.
Claim 6
Dependent Claim
31 words
A mowing machine as claimed in claim 3, wherein support means is located at the side of said mowing elements, at least in part, a given distance behind said mowing elements.
Claim 7
Dependent Claim
21 words
A mowing machine as claimed in claim 3, wherein said support means is positioned between said mowing machine and the tractor.
Claim 8
Dependent Claim
20 words
A mowing machine as claimed in claim 6, wherein said support means is comprised by at least one ground wheel.
Claim 9
Dependent Claim
26 words
A mowing machine as claimed in claim 7, wherein the width of said ground wheel is about one-quarter of the width of a tractor rear wheel.
Claim 10
Dependent Claim
22 words
A mowing machine as claimed in claim 3, wherein said support means is adjustable to vary the height of said frame beam.
Claim 11
Dependent Claim
23 words
A mowing machine as claimed in claim 9, wherein the height of said frame beam is adjusted by means of a screw spindle.
Claim 12
Dependent Claim
23 words
A mowing machine as claimed in claim 3, wherein the pivotal movement of said machine about the pivotal means is limited by stops.
Claim 13
Dependent Claim
29 words
A mowing machine as claimed in claim 11, wherein said machine is pivotally connected to said pivotal means to pivot about an axis extending in the direction of travel.
Claim 14
Dependent Claim
47 words
A mowing machine as claimed in claim 3, wherein said machine is supported on ground wheels in tandem and the distance between the points of ground contact of said wheels is greater than half the length of said frame beam extending transversely of the direction of travel.
Claim 15
Dependent Claim
38 words
A mowing machine as claimed in claim 13, wherein the distance between the points of ground contact is at least equal to the distance between the points where said two vertical axes are journaled in said frame beam.
Claim 16
Dependent Claim
32 words
A mowing machine as claimed in claim 1, wherein said mowing elements are substantially flat on the outer peripheries of their bottom sides with spherical, downwardly projecting extensions at the centers thereof.
Claim 17
Dependent Claim
82 words
A mowing machine for mowing grass and the like comprising a frame for connection to three-point lifting device of a tractor and a plurality of adjacent mowing elements adapted to rotate about vertical axes supported on said frame laterally of the tractor, said mowing elements having bottoms which have flat, outer peripheries and spherical, downwardly projecting extensions at the centers thereof, ground wheels supporting said elements and said ground wheels being mounted in tandem between said mowing elements and the prime mover.
Claim 18
Dependent Claim
82 words
A mowing machine for mowing grass and the like comprising a frame for connection to three-point lifting device of a tractor and a plurality of adjacent mowing elements adapted to rotate about vertical axes supported on said frame laterally of the tractor, said mowing elements having bottoms which have flat, outer peripheries and spherical, downwardly projecting extensions at the centers thereof, ground wheels supporting said elements and said ground wheels being mounted in tandem between said mowing elements and the prime mover.
Claim 19
Dependent Claim
31 words
A mowing machine as claimed in claim 16, wherein the diameters of the spherical extensions are about one-third of the diameter of the circles traced by blades of said mowing elements.
Claim 20
Dependent Claim
27 words
A mowing machine as claimed in claim 17, whereIn said blades of the mowing elements are located in a plane passing through the bottoms of the elements.
Claim 21
Dependent Claim
15 words
A mowing machine as claimed in claim 17, wherein said blades have substantially rectangular shapes.
Claim 22
Dependent Claim
57 words
A mowing machine as claimed in claim 16, wherein at the rear end of the mowing machine there is a screen extending rearwardly substantially throughout the width of the machine, the rear end of the screen being located at about the same level above the ground as the upper side of a conventional swath of mown crop.
Claim 23
Dependent Claim
84 words
A mowing machine for mowing grass and the like, comprising a frame for attachment to the three-point lifting device of a tractor and a plurality of adjacent mowing elements adapted to rotate about vertical axes supported side-by-side on said frame, a curved screen mounted adjacent said elements to extend rearwardly substantially throughout the width of said machine, the rear end of said screen being located approximately at the same level above the ground as the upper side of a conventional swath of mown crop.
Claim 24
Dependent Claim
84 words
A mowing machine for mowing grass and the like, comprising a frame for attachment to the three-point lifting device of a tractor and a plurality of adjacent mowing elements adapted to rotate about vertical axes supported side-by-side on said frame, a curved screen mounted adjacent said elements to extend rearwardly substantially throughout the width of said machine, the rear end of said screen being located approximately at the same level above the ground as the upper side of a conventional swath of mown crop.
Claim 25
Dependent Claim
28 words
A mowing machine as claimed in claim 21, wherein said machine has a frame beam located above said elements and said screen is fastened to said frame beam.
Claim 26
Dependent Claim
18 words
A mowing machine as claimed in claim 22 wherein the hindmost part of said screen extends substantially horizontally.
Claim 27
Dependent Claim
21 words
A mowing machine as claimed in claim 23, wherein the foremost part of said screen extends substantially in a horizontal direction.
Claim 28
Dependent Claim
32 words
A mowing machine as claimed in claim 22, wherein said screen extends from its fastening point on said frame beam over a given distance obliquely to the rear in a downward direction.
Claim 29
Dependent Claim
16 words
A mowing machine as claimed in claim 21, wherein said mowing elements rotate in opposite directions.
Claim 30
Dependent Claim
18 words
A mowing machine as claimed in claim 26, wherein blades of said rotatable mowing elements overlap each other.
Claim 31
Dependent Claim
18 words
A mowing machine as claimed in claim 27, wherein said machine is equipped with two rotatable mowing elements.
Claim 32
Dependent Claim
23 words
A mowing machine as claimed in claim 21, wherein the rotatable axes of said mowing elements are provided with flaps of flexible material.
Claim 33
Dependent Claim
117 words
A mowing machine for mowing grass and the like on a strip of land laterally of a tractor, said machine comprising a plurality of adjacent mowing elements rotatable about substantially vertical axes, said machine being pivotally connected to the tractor through a pivotal shaft, said shaft extending approximately at right angles to the direction of travel and said machine being located laterally of the tractor, said pivotal shaft having a lateral portion extending rearwardly and substantially in the direction of travel, said machine being pivotally connected to said portion, a drive shaft and transmission means connecting said drive shaft to said mowing elements, said drive shaft being connectable to the power-takeoff at the rear of the tractor.
Claim 34
Dependent Claim
117 words
A mowing machine for mowing grass and the like on a strip of land laterally of a tractor, said machine comprising a plurality of adjacent mowing elements rotatable about substantially vertical axes, said machine being pivotally connected to the tractor through a pivotal shaft, said shaft extending approximately at right angles to the direction of travel and said machine being located laterally of the tractor, said pivotal shaft having a lateral portion extending rearwardly and substantially in the direction of travel, said machine being pivotally connected to said portion, a drive shaft and transmission means connecting said drive shaft to said mowing elements, said drive shaft being connectable to the power-takeoff at the rear of the tractor.
Claim 35
Dependent Claim
104 words
A mowing machine for mowing grass and the like on a strip of land laterally of a tractor, said machine comprising a plurality of adjacent mowing elements rotatable about substantially vertical axes, said machine being pivotally connected to the tractor through a pivotal means, said pivotal means extending approximately at right angles to the direction of travel and said machine being located laterally of the tractor, said tractor having a three-point lifting device and said pivotal means being pivotally coupled with the lower two arms of said lifting device, said machine having ground-supporting means and said ground-supporting means being positioned adjacent said pivotal means.
Claim 36
Dependent Claim
104 words
A mowing machine for mowing grass and the like on a strip of land laterally of a tractor, said machine comprising a plurality of adjacent mowing elements rotatable about substantially vertical axes, said machine being pivotally connected to the tractor through a pivotal means, said pivotal means extending approximately at right angles to the direction of travel and said machine being located laterally of the tractor, said tractor having a three-point lifting device and said pivotal means being pivotally coupled with the lower two arms of said lifting device, said machine having ground-supporting means and said ground-supporting means being positioned adjacent said pivotal means.
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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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |