US3866781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underground mining machine
Assignee: Caterpillar Inc
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Filing: 1973-10-25
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Granted: 1975-02-18
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Expires: 1993-10-25
Abstract
Abstract A mining machine includes front and rear sections connected together for pivotal movement about a vertical axis. The front section is made up of a unitary frame which includes a lower frame portion, upwardly extending legs, and a roof portion. The roof portion defines an opening, and a door is associated therewith to selectively block and unblock such opening. A power unit is associated with the rear section, and is easily detachable therefrom.
Inventors
- 👤 Robert N Stedman
- 👤 Jay J Murphy
- 👤 Everette M Volle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:51
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/08; E02F9/0841
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
119 words
A material handling vehicle comprising: a rear section having a pair of supporting wheels; a front section having a pair of supporting wheels, the rear and front sections being connected together for pivotal movement about a vertical axis; said front section comprising a unitary frame comprising a lower frame portion, an upwardly extending frame portion extending therefrom and comprising front leg means, and a roof portion at the upper portion of the upwardly extending frame portion; a material handling implement adjacent the front of the front section; and means on said front leg means and in front of said roof interconnecting the implement and the unitary frame of the front section for raising and lowering the implement relative thereto.
Claim 2
Dependent Claim
119 words
A material handling vehicle comprising: a rear section having a pair of supporting wheels; a front section having a pair of supporting wheels, the rear and front sections being connected together for pivotal movement about a vertical axis; said front section comprising a unitary frame comprising a lower frame portion, an upwardly extending frame portion extending therefrom and comprising front leg means, and a roof portion at the upper portion of the upwardly extending frame portion; a material handling implement adjacent the front of the front section; and means on said front leg means and in front of said roof interconnecting the implement and the unitary frame of the front section for raising and lowering the implement relative thereto.
Claim 3
Dependent Claim
35 words
The material handling vehicle of claim 1 wherein the roof portion defines an opening therethrough, and further comprising openable and closable door means connected to the roof portion for selectively unblocking and blocking said opening.
Claim 4
Dependent Claim
53 words
The material handling vehicle of claim 2 wherein the means interconnecting the implement and front leg means of the unitary frame comprise arm means connected to the implement and pivotally connected to the front leg means between the lower portion and roof portion, and cylinder means interconnecting the unitary frame and arm means.
Claim 5
Dependent Claim
38 words
The material handling vehicle of claim 3 wherein the front leg means comprises first and second leg members, and wherein the arm means comprise first and second arms pivotally connected to the first and second leg members respectively.
Claim 6
Dependent Claim
69 words
The material handling vehicle of claim 4 and further comprising a prime mover, and a prime mover frame structure to which the prime mover is mounted, and means for removably securing the prime mover frame structure to the rear section, comprising pin means, and means interconnecting the prime mover with at least one of the support wheels, with the prime mover frame structure so secured, for driving the vehicle.
Claim 7
Dependent Claim
127 words
The material handling vehicle of claim 5 wherein the means for removably securing the prime mover frame structure to the rear section comprise a first pin disposable through a first aperture defined by the rear section and a first aperture defined by the prime mover frame structure, said first pin being disposed generally transversely of said rear section, a second pin disposable through a second aperture defined by the rear section and a second aperture defined by the prime mover frame structure, said second pin being disposed generally transversely of said rear section, and a third pin disposable through a third aperture defined by the rear section and a third aperture defined by the prime mover frame structure, and disposed generally vertically relative to the rear section.
Claim 8
Dependent Claim
38 words
The material handling vehicle of claim 6 wherein the first and second pins are positioned adjacent either side of the rear section, and wherein the third pin is positioned forwardly of and intermediate the first and second pins.
Claim 9
Dependent Claim
53 words
The material handling vehicle of claim 1 wherein the means interconnecting the implement and front leg means of the unitary frame comprise arm means connected to the implement and pivotally connected to the front leg means between the lower portion and roof portion, and cylinder means interconnecting the unitary frame and arm means.
Claim 10
Dependent Claim
38 words
The material handling vehicle of claim 8 wherein the front leg means comprises first and second leg members, and wherein the arm means comprise first and second arms pivotally connected to the first and second leg members respectively.
Claim 11
Dependent Claim
69 words
The material handling vehicle of claim 1 and further comprising a prime mover, and a prime mover framE structure to which the prime mover is mounted, and means for removably securing the prime mover frame structure to the rear section, comprising pin means, and means interconnecting the prime mover with at least one of the support wheels, with the prime mover frame structure so secured, for driving the vehicle.
Claim 12
Dependent Claim
130 words
The material handling vehicle of claim 10 wherein the means for removably securing the prime mover frame structure to the rear section comprise a first pin disposable through a first aperture defined by the rear section and a first aperture defined by the prime mover frame structure, said first pin being disposed generally transversely on said rear section, a second pin disposable through a second aperture defined by the rear section and a second aperture defined by the prime mover frame structure, said second pin being disposed generally transversely of said rear section, and a third pin disposable through a third aperture defined by the rear section and a third aperture defined by the prime mover frame structure, said third pin being disposed generally vertically relative to the rear section.
Claim 13
Dependent Claim
38 words
The material handling vehicle of claim 11 wherein the first and second pins are positioned adjacent either side of the rear section, and wherein the third pin is positioned forwardly of and intermediate the first and second pins.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |