Patent US3751889A successfully refreshed from Google Patents.
US3751889A
Expired / Lapsed
US
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Mowing machine
Assignee: B Krone Maschf GmbH
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Filing: 1971-10-22
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Granted: 1973-08-14
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Expires: 1991-10-22
Abstract
Abstract Mowing machine with at least one mowing device driven so as to rotate around a generally vertical axis, the mowing device being mounted upon a supporting beam, and the mowing machine being designed as a trailer-type machine with a pull bar and groundengaging supporting wheels. Each of the mowing devices is also supported on the ground by a supporting part. The supporting beam is braced by a system of guide bars connected to a separate machine frame so as to be able to swing freely parallel to itself up and down; the ground-engaging supporting wheels and the pull bar are connected to the frame.
Inventors
- 👤 A Overesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:31
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/64; A01D34/66; A01D34/661; A01D67/00; A01D67/005; Y; Y10; Y10S; Y10S56/00; Y10S56/01
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
218 words
A trailer-type mowing machine comprising an elongated machine frame, a draw bar attached to the frame and adapted to be connected to a vehicle which pulls the frame in a direction transverse to its length, wheels on the frame for supporting it on the ground, a supporting beam which in operative position is disposed parallel to the frame, the supporting beam being mounted in front of the machine frame with respect to the direction of mowing motion of the machine, at least one mowing device rotating about a generally vertical axis being mounted on the supporting beam, means on the mowing device for supporting it on the ground, and a system of guide bars extending between and connected to the frame and the supporting beam for mounting the supporting beam for free vertical movement parallel to itself, means for pivoting the supporting beam to the guide bars, the guide bars controlling the supporting beam so that such beam is able to perform an additional swinging motion in the direction of a vertical plane perpendicular to the direction of mowing motion of the machine, the system of guide bars which controls the swinging motion of the supporting beam comprising at least two spaced groups of guide bars, each group being attached near the respective end of the supporting beam.
Claim 2
Dependent Claim
218 words
A trailer-type mowing machine comprising an elongated machine frame, a draw bar attached to the frame and adapted to be connected to a vehicle which pulls the frame in a direction transverse to its length, wheels on the frame for supporting it on the ground, a supporting beam which in operative position is disposed parallel to the frame, the supporting beam being mounted in front of the machine frame with respect to the direction of mowing motion of the machine, at least one mowing device rotating about a generally vertical axis being mounted on the supporting beam, means on the mowing device for supporting it on the ground, and a system of guide bars extending between and connected to the frame and the supporting beam for mounting the supporting beam for free vertical movement parallel to itself, means for pivoting the supporting beam to the guide bars, the guide bars controlling the supporting beam so that such beam is able to perform an additional swinging motion in the direction of a vertical plane perpendicular to the direction of mowing motion of the machine, the system of guide bars which controls the swinging motion of the supporting beam comprising at least two spaced groups of guide bars, each group being attached near the respective end of the supporting beam.
Claim 3
Dependent Claim
52 words
A machine according to claim 1, wherein the machine frame is L-shaped and comprises a support arm disposed at right angles to the direction of mowing motion, and a traction arm which is affixed to one end of the support arm and extends in the direction of mowing motion of the machine.
Claim 4
Dependent Claim
137 words
A machine according to claim 2, wherein the draw bar is pivoted to the front end of the traction arm of the frame and can be operatively engaged at different angles with respect to the traction arm, the plane of rotation of the frame-supporting wheels and the vertical plane which is parallel with the direction of mowing motion forms an acute angle, the angle of the plane of rotation of the frame-supporting wheels is adjustable with respect to the vertical plane which is parallel to the direction of mowing motion, the frame supporting wheels are mounted on the frame so as to be vertically adjustable with respect thereto, and at least one frame-supporting wheel can be swung from an operative position on the frame to a transportation position generally at right angles to the operative position thereof.
Claim 5
Dependent Claim
38 words
A machine according to claim 3, wherein the traction arm of the frame is prOvided with connecting components so that the frame may be connected with the lower guide bars of the three-point hydraulic system of the tractor.
Claim 6
Dependent Claim
109 words
A machine according to claim 1 and comprising weight-relief springs for the supporting beam provided between the latter and the machine frame, wherein the weight-relief springs act upon the guide bars of the two parallel guide bar groups, a pressure-medium cylinder positioned between the guide bars of each parallel guide bar group so as to provide for at least one of weight relief and the lifting of the supporting beam, a pressure-medium cylinder attached to the supporting beam for the purpose of lifting the latter, and wherein the pressure-medium cylinder provided for the lifting of the supporting beam acts upon the latter via weight-relief springs for the supporting beam.
Claim 7
Dependent Claim
130 words
A machine according to claim 1, comprising a crushing device which has a horizontal gap and is connected to the frame behind the mowing device in the direction of mowing motion of the machine, wherein the crushing device is attached to the frame so as to be able to be swung upward from a working position into an inoperative position, and comprising a drive for the lifting of the crushing device, such drive being so constructed that it can be operated in conjunction with or independently of the drive provided for the lifting of the supporting beam, and means for driving the rollers of the crushing device, the drive for the crushing device being taken off the drive for the mowing device and being provided with a separate on/off control.
Claim 8
Dependent Claim
25 words
A machine according to claim 1, wherein the guide bars are of variable length, and comprising means for holding the arms at their adjusted lengths.
Claim 9
Dependent Claim
32 words
A machine according to claim 1, wherein the mowing machine is drawn by a tractor having a power take-off, and comprising a drive train extending from the tractor and the mowing device.
Claim 10
Dependent Claim
63 words
A machine according to claim 8, wherein the drive train includes a belt drive comprising spaced pulleys connected by a belt, one of the pulleys being located at the tractor-side front end of the supporting beam, the other pulley being located at the machine frame, the distance between the axles of the pulleys being essentially constant during swinging movements of the supporting beam.
Claim 11
Dependent Claim
75 words
A machine according to claim 8, wherein the drive train comprises a shaft located inside the draw bar, a universal joint attached coaxially with regard to the common axis of the draw bar pivot at the traction arm of the machine frame, an intermediate shaft, a miter gear set the drive shaft of which supports a belt pulley, and a driving belt entrained over the pulley and extending between the frame and the supporting beam.
Claim 12
Dependent Claim
62 words
A machine according to claim 1, comprising a belt drive for operating the mowing device, said belt drive having one belt pulley located in front of the tractor-side front end of the supporting beam, and a second pulley attached to the driven shaft of a miter gear set which is attached to a support projecting toward the front from the supporting beam.
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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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |