Patent US3568778A successfully refreshed from Google Patents.
US3568778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor grader apparatus
Assignee: CMI Terex Corp
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Filing: 1969-01-23
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Granted: 1971-03-09
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Expires: 1989-01-23
Abstract
Abstract Apparatus for earth working which consists of two similar mobile assemblies including drive engine and traction elements and which are oriented in back-to-back manner to support a main frame therebetween in articulated suspension. The main frame is adapted to carry a subframe which further supports one or more earth working implements in adjustable manner therebelow, and the operating cab is movably supported by a support arm which is rotatably affixed at a central position on the main frame.
Inventors
- 👤 George W Swisher Jr
- 👤 Gordon L Spivey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:31
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/78; E02F3/783; B; B62; B62D; B62D53/00; B62D53/02; B62D53/023; B62D59/00; B62D59/04; E02F3/7636; E02F3/764; E02F9/00; E02F9/08; E02F9/0841; E02F9/16; E02F9/166
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
198 words
Earth working apparatus comprising: first mobile means, including a drive power source, a tandem wheel assembly, and support means supporting said drive power source and being connected to said tandem wheel assembly at a point which is central with respect to the tandem wheel assembly; second mobile means, including a drive power source, a tandem wheel assembly, and support means supporting said drive power source and being connected to said tandem wheel assembly at a point which is central with respect to the tandem wheel assembly; first frame end means having a bifurcated end and a single end and being pivotally affixed to said first mobile means; second frame end means having a bifurcated end and a single end and being pivotally affixed to said second mobile means; central frame means having elongated form and being pivotally affixed at first and second points along its long dimension to respective bifurcated ends of said first and second frame end means; subframe means pivotally supported from said central frame means; earth working means supported beneath said subframe means; and an operating cab enclosure rotatably affixed on top of said central frame means for selected positioning thereon to gain optimum surveillance.
Claim 2
Dependent Claim
198 words
Earth working apparatus comprising: first mobile means, including a drive power source, a tandem wheel assembly, and support means supporting said drive power source and being connected to said tandem wheel assembly at a point which is central with respect to the tandem wheel assembly; second mobile means, including a drive power source, a tandem wheel assembly, and support means supporting said drive power source and being connected to said tandem wheel assembly at a point which is central with respect to the tandem wheel assembly; first frame end means having a bifurcated end and a single end and being pivotally affixed to said first mobile means; second frame end means having a bifurcated end and a single end and being pivotally affixed to said second mobile means; central frame means having elongated form and being pivotally affixed at first and second points along its long dimension to respective bifurcated ends of said first and second frame end means; subframe means pivotally supported from said central frame means; earth working means supported beneath said subframe means; and an operating cab enclosure rotatably affixed on top of said central frame means for selected positioning thereon to gain optimum surveillance.
Claim 3
Dependent Claim
47 words
Earth working apparatus as set forth in claim 1 wherein said earth working means comprises: ring means supported in generally horizontal attitude beneath said subframe means in rotatable manner; and an earth working implement supported beneath said ring means in adjustable manner at an earth working position.
Claim 4
Dependent Claim
35 words
Earth working apparatus as set forth in claim 2 which is further characterized to include: a second earth working implement supported from said ring means to function in coaction with said first earth working implement.
Claim 5
Dependent Claim
95 words
Earth working apparatus as set forth in claim 1, wherein said first mobile means is further characterized to include: first hydraulic means connected centrally on said mobile means and to a side position of said central frame means; actuating means for controlling said first hydraulic means to effect tilt positioning of said central frame means; second hydraulic means connected centrally of said first mobile means and to the opposite side of said central frame means; and second actuating means for controlling said second hydraulic means to effect opposite tilt positioning of said central frame means.
Claim 6
Dependent Claim
64 words
Earth working apparatus as set forth in claim 4, which is further characterized to include: third hydraulic means secured on said first mobile means and including a piston for extension into locking engatement in said central frame means; and third actuating means to extend said piston to lock said central frame means in a predetermined position of alignment relative to said first mobile means.
Claim 7
Dependent Claim
105 words
Earth working apparatus as set forth in claim 1, which is further characterized to include: pivot bearing means including first and second steering levers affixed to said first frame end means such that said first and second steering levers extend outward on opposite sides thereof; first hydraulic means connected between said first steering lever and said first mobile means to effect pivotal movement between said first mobile means and said first frame end means; and second hydraulic means connected between said second steering lever and said first mobile means to effect opposite pivotal movement between said first mobile means and said first frame end means.
Claim 8
Dependent Claim
105 words
Earth working apparatus as set forth in claim 4, which is further characterized to include: pivot bearing means including first and second steering levers affixed to said first frame end means such that said first and second steering levers extend outward on opposite sides thereof; first hydraulic means connected between said first steering lever and said first mobile means to effect pivotal movement between said first mobile means and said first frame end means; and second hydraulic means connected between said second steering lever and said first mobile means to effect opposite pivotal movement between said first mobile means and said first frame end means.
Claim 9
Dependent Claim
68 words
Earth working apparatus as set forth in claim 5, which is further characterized to include: pivot bearing means affixed to each of said first and second frame end means to extend steering levers outwardly on each side; first and second hydraulic steering means, each connected to opposite sides of said first and second mobile means and to opposite ones of said steering levers to effect reciprocal steering action.
Claim 10
Dependent Claim
101 words
Earth working apparatus as set forth in claim 1, which is further characterized to include: first power means affixed on said central frame and controllable to move said first frame end means relative to said central frame means to raise and lower said central frame means; second power means affixed on said central frame and controllable to move said second frame end means relative to said central frame means to raise and lower said central frame means; and control means energizable to control said first and second power means in coaction to control raising and lowering of said central frame means.
Claim 11
Dependent Claim
120 words
Earth working apparatus as set forth in claim 1 which is further characterized to include: first power means connected between a first end of said central frame means and an end of said first end frame means such that said first power means can be actuated to vary the angle of joinder of said central frame means and first end frame means at said respective pivotal connection; and second power means connected between a second end of said central frame means and an end of said second end frame means such that said second power means can be actuated to vary the angle of joinder of said central frame means and second end frame means at said respective pivotal connection.
Claim 12
Dependent Claim
82 words
Earth working apparatus as set forth in claim 1 wherein said operating cab enclosure comprises: support arm means having first and second ends and having the first end rotatably affixed atop said central frame means; operating cab means including seat space and controls rigidly affixed to the second end of said support arm means; and control means including drive and brake structure for positioning said support arm means and operating cab means at a selected position relative to said central frame 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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |