Patent US3811290A successfully refreshed from Google Patents.
US3811290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-purpose vehicle for use underground
Assignee: AUTOMATION EQUIPMENT Inc
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Filing: 1972-10-20
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Granted: 1974-05-21
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Expires: 1992-10-20
Abstract
Abstract A self-propelled vehicle having independently steerable and suspended wheel assemblies for use in underground excavations. The vehicle includes means for temporarily supporting the roof of an excavation, drilling holes in the roof, and inserting bolts therein. The vehicle also includes scoops mounted at each end with a conveyor joining the scoops, thus giving the machine a self-loading capacity. The application also discloses a method for systematically installing roof bolts.
Inventors
- 👤 J Swoager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:09
CPC Classifications
E; E21; E21F; E21F13/00; E21F13/02; E21F13/025; E21D; E21D20/00; E21D20/003; E21D23/00; E21D23/0086; E21D23/0095
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
116 words
A self-propelled vehicle for use in underground excavations having a floor and a ceiling, said vehicle comprising: a frame; wheel assemblies supporting said frame, said wheel assemblies being independently suspended and steerable; a body supported on said frame; first lifting means supporting by said frame for raising said body above said frame; a plurality of rotatable chuck assemblies disposed within said body and adapted to engage a workpiece for insertion into said ceiling; second lifting means supported by said body and engaging said chuck assemblies for raising said chuck assemblies above said body; and means mounted on said frame for contacting said ceiling above said vehicle and said floor below to support said ceiling against collapse.
Claim 2
Dependent Claim
116 words
A self-propelled vehicle for use in underground excavations having a floor and a ceiling, said vehicle comprising: a frame; wheel assemblies supporting said frame, said wheel assemblies being independently suspended and steerable; a body supported on said frame; first lifting means supporting by said frame for raising said body above said frame; a plurality of rotatable chuck assemblies disposed within said body and adapted to engage a workpiece for insertion into said ceiling; second lifting means supported by said body and engaging said chuck assemblies for raising said chuck assemblies above said body; and means mounted on said frame for contacting said ceiling above said vehicle and said floor below to support said ceiling against collapse.
Claim 3
Dependent Claim
18 words
A vehicle as recited in claim 1 wherein: said chuck assemblies are gimbal-mounted on said second lifting means.
Claim 4
Dependent Claim
29 words
A vehicle as recited in claim 1 wherein: each of said chuck assemblies includes a plurality of dogs pivotally mounted on said chuck assembly for releasably engaging said workpiece.
Claim 5
Dependent Claim
30 words
A vehicle as recited in claim 1 wherein: said means for contacting said ceiling and said floor to support said ceiling against collapse comprises hydraulic jacks adapted for independent actuation.
References Cited (Backward Citations)
US876542A
Cited
US2053665A
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US2316672A
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US2711634A
Cited
US3136534A
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US3501040A
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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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |