Patent US4711072A successfully refreshed from Google Patents.
US4711072A
Expired / Lapsed
US
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Grass cutting attachment for tractor
Assignee: Ransomes Sims and Jeffries Ltd
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Filing: 1986-01-17
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Granted: 1987-12-08
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Expires: 2006-01-17
Abstract
Abstract A grass cutting attachment for use particularly with compact tractors has a mounting frame, two cutting units lying behind the tractor front wheels and respective support arms which extend from a forward part of the frame rearwardly over the tractor front wheels to support the cutting units. The support arms are pivotal about inclined axes so that the cutting units may be lifted and simultaneously brought sideways into the tractor to reduce overall width. The cutting units are mounted for rocking movement relative to the support arms about fore and aft axis, these axis becoming inclined in the lifted position so that each unit is tilted forwardly and upwardly to improve operator access.
Inventors
- 👤 Edward J. Aldred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:21
CPC Classifications
A; A01; A01B; A01B59/00; A01B59/04; A01B59/048; A01D; A01D75/00; A01D75/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
106 words
A grass cutting attachment comprising a frame adapted for fixed mounting to a tractor with a frame part positioned fowardly of the tractor front axle; two support arms each pivotally mounted at one end thereof to the frame part at a location therein forwardly of the tractor front axle and carrying at the other end a cutting unit, the support arms extending rearwardly past the tractor front axle to position the associated cutting units between front and rear tractor wheels, the arrangement being such that pivotal movement of each support arm relative to the frame effects bodily movement of the associated cutting unit from the ground.
Claim 2
Dependent Claim
106 words
A grass cutting attachment comprising a frame adapted for fixed mounting to a tractor with a frame part positioned fowardly of the tractor front axle; two support arms each pivotally mounted at one end thereof to the frame part at a location therein forwardly of the tractor front axle and carrying at the other end a cutting unit, the support arms extending rearwardly past the tractor front axle to position the associated cutting units between front and rear tractor wheels, the arrangement being such that pivotal movement of each support arm relative to the frame effects bodily movement of the associated cutting unit from the ground.
Claim 3
Dependent Claim
74 words
A cutting attachment according to claim 1, wherein each cutting unit is pivotal with respect to the associated support arm about an axis which in a cutting position lies in the direction of movement of the tractor such that, after lifting of the cutting unit through pivotal movement of the support arm, rotation of the cutting unit about said axis serves to bring the cutting unit to a transport position of reduced overall width.
Claim 4
Dependent Claim
36 words
A cutting attachment according to claim 2, wherein said axis is rearwardly and upwardly inclined in the transport position of the support arm, whereby the cutting unit is upwardly and forwardly inclined in the transport position.
Claim 5
Dependent Claim
51 words
A cutting attachment according to claim 2, wherein co-operating abutment means are provided respectively on each cutting unit and on the frame such that on continued lifting of the cutting unit through pivotal movement of the support arm, engagement between the co-operating abutment means effects said rotation of the cutting unit.
Claim 6
Dependent Claim
21 words
A cutting attachment according to claim 4, wherein said co-operating abutment means comprise at least one roller and a striking plate.
Claim 7
Dependent Claim
21 words
A cutting attachment according to claim 5, in which said striking plate has a curved surface for engagment with said roller.
Claim 8
Dependent Claim
52 words
A cutting attachment according to claim 1, wherein the pivotal mounting of each support arm to the frame part comprises a pivotal bearing axis which is inclined to the transverse direction such that pivotal movement of the support arm serves to move the cutting unit both upwardly and inwardly of the tractor.
Claim 9
Dependent Claim
28 words
A cutting attachment according to claim 7, wherein the pivotal bearing axis is inclined in a horizontal plane forwardly and outwardly with a respect to the frame part.
Claim 10
Dependent Claim
24 words
A cutting attachment according to claim 1, wherein each support arm is bowed so as substantially to pass over the associated tractor front wheel.
Claim 11
Dependent Claim
31 words
A cutting attachment according to claim 1, wherein co-operating locking means are provided on each cutting unit and the frame part releasably to hold the cutting unit in a lifted position.
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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) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |