US4265487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure water jet mining machine
Assignee: University of Missouri System
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Filing: 1979-10-09
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Granted: 1981-05-05
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Expires: 1999-10-09
Abstract
Abstract A high pressure water jet mining machine for the longwall mining of coal is described. The machine is generally in the shape of a plowshare and is advanced in the direction in which the coal is cut. The machine has mounted thereon a plurality of nozzle modules each containing a high pressure water jet nozzle disposed to oscillate in a particular plane. The nozzle modules are oriented to cut in vertical and horizontal planes on the leading edge of the machine and the coal so cut is cleaved off by the wedge-shaped body.
Inventors
- 👤 Clark R. Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:56
CPC Classifications
E; E21; E21C; E21C25/00; E21C25/60
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
A machine for mining coal and other geologic materials comprising: a generally wedge-shaped body portion having a leading edge and adapted to be moved parallel to a working face of material being excavated; at least one nozzle module mounted on said body portion adjacent said leading edge and containing an arcuately movable nozzle oriented to oscillate in a vertical plane for cutting a vertical slot in the material in advance of the direction of motion of said leading edge; said module having a housing with a pair of parallel oppositely facing hardened convexly arcuate blades on the leading edge thereof defining an exit slot for water jets ejected from the said nozzle and for protecting said nozzle from contact with the material being cut.
Claim 2
Dependent Claim
124 words
A machine for mining coal and other geologic materials comprising: a generally wedge-shaped body portion having a leading edge and adapted to be moved parallel to a working face of material being excavated; at least one nozzle module mounted on said body portion adjacent said leading edge and containing an arcuately movable nozzle oriented to oscillate in a vertical plane for cutting a vertical slot in the material in advance of the direction of motion of said leading edge; said module having a housing with a pair of parallel oppositely facing hardened convexly arcuate blades on the leading edge thereof defining an exit slot for water jets ejected from the said nozzle and for protecting said nozzle from contact with the material being cut.
Claim 3
Dependent Claim
31 words
The machine of claim 1 including: drive means contained within said body portion for oscillating said nozzle; and sealing means for isolating the interior or said module from said drive means.
Claim 4
Dependent Claim
55 words
The machine of claim 1 including: at least one module containing an arcuately movable oscillating nozzle mounted on the bottom of said body portion adjacent said leading edge and oriented to oscillate in a horizontal plane for under-cutting a horizontal slot in the material in advance of the direction of motion of said leading edge.
Claim 5
Dependent Claim
55 words
The machine of claim 3 including: at least one module containing an arcuately movable oscillating nozzle mounted on the top of said body portion adjacent said leading edge and oriented to oscillate in a horizontal plane for top-cutting a horizontal slot in the material in advance of the direction of motion of said leading edge.
Claim 6
Dependent Claim
33 words
The machine of claim 3 including: at least two modules mounted on said body portion with one on top of the other and oriented to cut a continuous vertical slot in the material.
Claim 7
Dependent Claim
6 words
The machine of claim 5 wherein:
Claim 8
Dependent Claim
31 words
said modules are offset longitudinally with respect to said leading edge of said body portion in the direction of travel whereby the size of pieces of material excavated can be regulated.
Claim 9
Dependent Claim
31 words
said modules are offset longitudinally with respect to said leading edge of said body portion in the direction of travel whereby the size of pieces of material excavated can be regulated.
References Cited (Backward Citations)
US3887235A
Cited
US4181363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |