Patent US3608643A successfully refreshed from Google Patents.
US3608643A
Expired / Lapsed
US
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Grading machines
Assignee: Universal Graders Ltd
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Filing: 1969-02-10
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Granted: 1971-09-28
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Expires: 1989-02-10
Abstract
Abstract A machine, particularly a grading machine, comprising a draw bar having a tool support depending therefrom through a vertical pivot to enable angling of the support, a grading blade or other tool is carried on the front of the support which has a pair of wheels attached to a beam at the rear thereof; the blade or other tool can be raised and lowered as well as angled and the wheels can be steered by an operator sitting on a seat behind the tool support.
Inventors
- 👤 John Reginald Flood
- 👤 John Barr Rogerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:21
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/7663; E02F3/7672
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
153 words
A grading machine comprising a grading blade, a main bar, a vertical pivot means connecting the main bar with the grading blade so that the grading blade is pivotable about a vertical axis relative to the main bar, means between the grading blade and the main bar for pivoting the grading blade about said vertical pivot means irrespective of the position of the main bar, a pair of spaced, short beams extending rearwardly of the grading blade on either side of the center thereof, vertical and horizontal pivot means connecting each of the spaced, short beams with the back of the grading blade, a wheel rotatably mounted on each short beam, each of said wheels being located closely behind the grading blade, and means disposed between each beam and the grading blade for turning each beam separately about its horizontal pivot means so as to effect raising and/or lowering of the grading blade.
Claim 2
Dependent Claim
153 words
A grading machine comprising a grading blade, a main bar, a vertical pivot means connecting the main bar with the grading blade so that the grading blade is pivotable about a vertical axis relative to the main bar, means between the grading blade and the main bar for pivoting the grading blade about said vertical pivot means irrespective of the position of the main bar, a pair of spaced, short beams extending rearwardly of the grading blade on either side of the center thereof, vertical and horizontal pivot means connecting each of the spaced, short beams with the back of the grading blade, a wheel rotatably mounted on each short beam, each of said wheels being located closely behind the grading blade, and means disposed between each beam and the grading blade for turning each beam separately about its horizontal pivot means so as to effect raising and/or lowering of the grading blade.
Claim 3
Dependent Claim
23 words
The grading machine as claimed in claim 1, wherein means are provided between the main bar and said beams for steering the wheels.
Claim 4
Dependent Claim
29 words
The grading machine as claimed in claim 1, wherein said means for pivoting the grading blade includes fluid power means provided between the main bar and the grading blade.
Claim 5
Dependent Claim
55 words
The grading machine as claimed in claim 1, wherein each beam is attached to a bar by means of the horizontal pivot means of said vertical and horizontal pivot means, said bar being pivotally connected by means of the vertical pivot means of said vertical and horizontal pivot means to a support behind the blade.
Claim 6
Dependent Claim
41 words
The grading machine as Claimed in claim 4, wherein the means for turning each beam comprise a piston and cylinder device pivotally attached at one end to the bar and at the other end to the beam associated with each wheel.
Claim 7
Dependent Claim
68 words
The grading machine as claimed in claim 4 wherein means are provided for steering the wheels, said means comprising a lever pivoted to the main bar, track rod means pivotally connecting the lever with each said bar and a piston and cylinder device connected to the lever and to a member fixed to the main bar and arranged to effect movement of the lever to steer the wheels.
Claim 8
Dependent Claim
25 words
The grading machine as claimed in claim 1, wherein the main bar is a drawbar whereby the machine can be drawn by a powered vehicle.
Claim 9
Dependent Claim
33 words
The grading machine as claimed in claim 3, wherein the means for angling the grading blade comprises a pair of piston and cylinder devices connected between the main bar and the grading blade.
Claim 10
Dependent Claim
17 words
The grading machine as claimed in claim 1, wherein a scarifier is attached to the main bar.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |