US4583329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure jets
Assignee: BARRIQUAND & FILS
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Filing: 1985-02-07
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Granted: 1986-04-22
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Expires: 2005-02-07
Abstract
Abstract High pressure liquid jets including finely divided abrasive particles suspended therein, are produced a substantial distance (e.g. from 20 m up to 100 m or more) from the liquid and particle sources by separately pumping the liquid and the particles over the distance, and then combining the two in a venturi and delivering the mixture to a nozzle. The abrasive particles are conveyed over the distance in a carrier fluid (e.g. air) which is then separated off immediately before the particles arrive at the venturi.
Inventors
- 👤 Howard J. Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:29
CPC Classifications
B; B24; B24C; B24C7/00; B24C7/0046; B24C7/0076; B24C3/00; B24C3/32; B24C3/325
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
142 words
A method of providing a high pressure jet comprising a liquid and finely divided solid abrasive particles intimately mixed therein, said method enabling said jet to be produced at a substantial distance from sources of said liquid and said abrasive respectively, which method comprises: delivering said liquid under pressure from a source thereof over said distance to a first venturi; delivering a carrier gas under pressure to a second venturi to draw into carrying admixture therewith particulate abrasive from a source thereof; allowing the admixture to flow through a conduit over said distance; then venting carrier gas from the flowing admixture while the remaining particulate abrasive is drawn on into said first venturi to form therein a mixture with said liquid; and supplying the said mixture to a nozzle to issue therefrom as a high pressure jet of liquid and abrasive particles.
Claim 2
Independent Claim
142 words
A method of providing a high pressure jet comprising a liquid and finely divided solid abrasive particles intimately mixed therein, said method enabling said jet to be produced at a substantial distance from sources of said liquid and said abrasive respectively, which method comprises: delivering said liquid under pressure from a source thereof over said distance to a first venturi; delivering a carrier gas under pressure to a second venturi to draw into carrying admixture therewith particulate abrasive from a source thereof; allowing the admixture to flow through a conduit over said distance; then venting carrier gas from the flowing admixture while the remaining particulate abrasive is drawn on into said first venturi to form therein a mixture with said liquid; and supplying the said mixture to a nozzle to issue therefrom as a high pressure jet of liquid and abrasive particles.
Claim 3
Dependent Claim
43 words
A method according to claim 1, wherein the carrier gas is separated from said abrasive particles in a separator comprising a through conduit having an orifice in a wall thereof for escape of said gas without significant concomitant loss of said abrasive particles.
Claim 4
Dependent Claim
29 words
A method according to claim 2, wherein said separator includes a vent hose connecting to said orifice exteriorly of said conduit, to vent said gas away from said orifice.
Claim 5
Dependent Claim
42 words
A method according to claim 2, wherein said separator includes a vent hose connecting to said orifice exteriorly of said conduit, said hose being so configured as substantially to prevent any liquid gathering therein from returning through said orifice into said conduit.
Claim 6
Dependent Claim
34 words
A method according to claim 1, wherein said liquid is aqueous, said carrier gas is air, and said high pressure jet is produced from a nozzle disposed within a pipe, such as a sewer.
Claim 7
Dependent Claim
14 words
A method according to claim 1, wherein said distance is at least 20 meters.
Claim 8
Dependent Claim
163 words
Apparatus for providing a high pressure jet, comprising a liquid having finely divided solid abrasive particles dispersed therein, at a substantial distance from sources of said liquid and said abrasive respectively, which apparatus comprises a first venturi, a first conduit for delivering liquid under pressure over said distance from said source to said first venturi; a second venturi means for delivering gas under pressure to said second venturi; a source of particulate abrasive; means connecting said source to said second venturi to allow said abrasive to be drawin into admixture with said gas therein; a separator for separating solids from the carrier gas; a second conduit, for delivering said abrasive in said carrier gas over said distance from said second venturi to said separator; a third conduit for delivering said abrasive from said separator to said first venturi; a nozzle for producing a high pressure jet; and means for supplying the mixture of liquid and abrasive formed in the venturi to said nozzle.
Claim 9
Dependent Claim
163 words
Apparatus for providing a high pressure jet, comprising a liquid having finely divided solid abrasive particles dispersed therein, at a substantial distance from sources of said liquid and said abrasive respectively, which apparatus comprises a first venturi, a first conduit for delivering liquid under pressure over said distance from said source to said first venturi; a second venturi means for delivering gas under pressure to said second venturi; a source of particulate abrasive; means connecting said source to said second venturi to allow said abrasive to be drawin into admixture with said gas therein; a separator for separating solids from the carrier gas; a second conduit, for delivering said abrasive in said carrier gas over said distance from said second venturi to said separator; a third conduit for delivering said abrasive from said separator to said first venturi; a nozzle for producing a high pressure jet; and means for supplying the mixture of liquid and abrasive formed in the venturi to said nozzle.
Claim 10
Dependent Claim
43 words
Apparatus according to claim 7, wherein said separator comprises a walled through-passage having an orifice in said wall, the orifice being so dimensioned and positioned as to permit carrier gas to exit therethrough without substantial concomitant loss of abrasive particles from said passage.
Claim 11
Dependent Claim
43 words
Apparatus according to claim 7, wherein said separator includes a walled through-passage having an orifice in a wall thereof to remove carrier gas, and wherein a vent hose is provided, externally of said through-passage, connecting to said orifice to vent way carrier gas.
Claim 12
Dependent Claim
28 words
Apparatus according to claim 9, wherein said vent hose is so configured as substantially to prevent any liquid exiting from said orifice to return therethrough into said through-passage.
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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) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |