US4789141A — Nozzles for injecting substances into liquids

Claim 1

Independent Claim 114 words

An injection nozzle for the wall of a liquid containment vessel for use when injecting substances into the liquid, comprising a body having at least one injection passage extending to a discharge end of the body, a passage closing means embedded in the body, the closing means comprising a hollow shell closed at one end and resistant to percolation of liquid therethrough, a sidewall and end closing portion of the shell being united by a shell portion of reduced strength permitting a force applied to the closing portion to detach the latter from the sidewall and create an opening between the passage and the discharge end, for injection via the passage and said opening.

Claim 2

Dependent Claim 114 words

An injection nozzle for the wall of a liquid containment vessel for use when injecting substances into the liquid, comprising a body having at least one injection passage extending to a discharge end of the body, a passage closing means embedded in the body, the closing means comprising a hollow shell closed at one end and resistant to percolation of liquid therethrough, a sidewall and end closing portion of the shell being united by a shell portion of reduced strength permitting a force applied to the closing portion to detach the latter from the sidewall and create an opening between the passage and the discharge end, for injection via the passage and said opening.

Claim 3

Dependent Claim 32 words

A nozzle according to claim 1, wherein the shell has its end closing portion directed toward the discharge end of the body, and its sidewall at least in part defines the passage.

Claim 4

Dependent Claim 51 words

A nozzle according to claim 1, wherein the shell has its end closing portion directed toward the said discharge end and separated therefrom by a portion of the body which is separable from the remainder of the body when the end closing portion is detached from the sidewall of the shell.

Claim 5

Dependent Claim 58 words

A nozzle according to claim 1, wherein the shell has its end closing portion directed toward the said discharge end and separated therefrom by a bung embedded in the discharge end of the body, the bung and end closing means being dislodgeable from the body when the end closing means is detached from the sidewall of the shell.

Claim 6

Dependent Claim 16 words

A nozzle according to claim 1, wherein the shell is a cup or thimble shaped element.

Claim 7

Dependent Claim 33 words

A nozzle according to claim 5, wherein the shell defines a portion of the passage adjacent the said discharge end, and a separate passage-lining tube extends upstream from the shell through the body.

Claim 8

Dependent Claim 45 words

A nozzle according to claim 1, wherein the shell is a tubular element having an integral closed end, and its sidewall thickness is reduced adjacent the said end locally to weaken said shell and render the closed end detachable in response to the said force.

Claim 9

Dependent Claim 33 words

A nozzle according to claim 7, wherein the shell defines a portion of the passage adjacent the said discharge end, and a separate passage-lining tube extends upstream from the shell through the body.

Claim 10

Dependent Claim 33 words

A nozzle according to claim 7, wherein the tubular shell is located adjacent the said discharge end, and extends through a major part of the body to serve as a passage-defining liner means.

Claim 11

Dependent Claim 44 words

A nozzle according to claim 1, wherein the shell is stepped inwardly from its sidewall to its end closing portion and has confronting outer and inner corners which define the weakened shell portion and make it frangible therebetween, thereby rendering the closing portion detachable.

Claim 12

Dependent Claim 34 words

A nozzle according to claim 1, wherein the shell is stepped inwardly between its sidewall and end closing portion to form a thin intervening shell portion which is frangible to render the base detachable.

Claim 13

Dependent Claim 36 words

A nozzle according to claim 1, wherein the shell has its end closing portion directed toward the said discharge end and its sidewall has an external surface which enlarges away from the said end closing portion.

Claim 14

Dependent Claim 24 words

A nozzle according to claim 1, in combination with a slidingly movable lance pipe in said at least one passage of the nozzle body.

Claim 15

Dependent Claim 80 words

Injection apparatus comprising a nozzle according to claim 1, a lance pipe slidingly movable in said at least one passage, means for forcibly advancing the pipe lengthwise in the passage from a standby position to an injection position, for causing the pipe to impact upon the closing means and sever the detachable portion therefrom during the advancing movement, and means to connect the lance pipe to a source of pressurized gas or gas plus other treatment substance to be injected.

Claim 16

Dependent Claim 98 words

An injection nozzle for installing in the wall of a liquid containment vessel, for use when injecting substances into the liquid, comprising a nozzle body formed with a plurality of passages arranged at intervals along a ring, and at its discharge end the body has an annular closing member defining discharge portions of the passages which discharge portions are each closed by a frangible web, the said member including its webs being resistant to percolation of liquid into the passages, and the webs being detachable from the annular member by forces applied thereto from inside their associated passages.

Claim 17

Dependent Claim 98 words

An injection nozzle for installing in the wall of a liquid containment vessel, for use when injecting substances into the liquid, comprising a nozzle body formed with a plurality of passages arranged at intervals along a ring, and at its discharge end the body has an annular closing member defining discharge portions of the passages which discharge portions are each closed by a frangible web, the said member including its webs being resistant to percolation of liquid into the passages, and the webs being detachable from the annular member by forces applied thereto from inside their associated passages.

Claim 18

Dependent Claim 30 words

A nozzle according to claim 15, wherein the closing member has recesses coincident with the passages in one surface thereof, bottoms of the recesses being formed by the frangible webs.

Claim 19

Dependent Claim 59 words

A nozzle according to claim 16, wherein the closing member is inset from a discharge face of the body and is enclosed within the material forming said body, portions of the body covering the frangible webs being adapted to be detachable from the remainder of the body with the webs, when the latter are detached by the said forces.

Claim 20

Dependent Claim 61 words

A nozzle according to claim 15, wherein the closing member has first recesses coincident with the passages in a first surface of the said member and second recesses coincident with the first recesses in a second surface of the said member, the frangible webs being disposed between the bottoms of respective recesses, and dislodgeable plugs being seated in the second recesses.

Claim 21

Dependent Claim 19 words

A nozzle according to claim 15, in combination with slidingly movable lance pipes in passages of the nozzle body.

Claim 22

Dependent Claim 78 words

Injection apparatus comprising a nozzle according to claim 15, lance pipes slidingly movable in passages of the body, means for forcibly advancing a pipe lengthwise in its passage from a standby position to an injection position, for causing the pipe to impact upon the closing means and sever the detachable portion therefrom during the advancing movement, and means to connect a lance pipe to a source of pressurized gas or gas plus other treatment substance to be injected.

Claim 23

Dependent Claim 67 words

A combination of replacement components for installing in an injection nozzle, comprising a metal lance pipe, a tubular guide element for slidably receiving the said pipe, and a refractory closing element resistant to percolation of liquids therethrough, the closing element being of reduced strength adjacent a closing portion thereof to render the latter readily detachable from the remainder of said element when the closing portion is struck.

Claim 24

Dependent Claim 67 words

A combination of replacement components for installing in an injection nozzle, comprising a metal lance pipe, a tubular guide element for slidably receiving the said pipe, and a refractory closing element resistant to percolation of liquids therethrough, the closing element being of reduced strength adjacent a closing portion thereof to render the latter readily detachable from the remainder of said element when the closing portion is struck.

Claim 25

Dependent Claim 72 words

A passage closing element for use in an injection nozzle to close an injection passage therein comprising a hollow, fine-grained refractory shell which is closed at one end and is resistant to the percolation of liquids therethrough, the shell having an end closing portion and sidewall united by a shell portion of reduced strength enabling the end closing portion to be detached from the sidewall by breakage of the said shell portion.

Claim 26

Dependent Claim 72 words

A passage closing element for use in an injection nozzle to close an injection passage therein comprising a hollow, fine-grained refractory shell which is closed at one end and is resistant to the percolation of liquids therethrough, the shell having an end closing portion and sidewall united by a shell portion of reduced strength enabling the end closing portion to be detached from the sidewall by breakage of the said shell portion.

Claim 27

Dependent Claim 77 words

A passage closing element for use in an injection nozzle to close injection passages therein, comprising an annular, fine-grained refractory body resistant to the percolation of liquids therethrough, the annular body having recesses in a surface thereof to define apertures for discharge of injectants, the recesses extending to and terminating in thin closing webs and the body being of weakened configuration adjacent the webs to enable them to be broken away from the remainder of the body.

Claim 28

Dependent Claim 77 words

A passage closing element for use in an injection nozzle to close injection passages therein, comprising an annular, fine-grained refractory body resistant to the percolation of liquids therethrough, the annular body having recesses in a surface thereof to define apertures for discharge of injectants, the recesses extending to and terminating in thin closing webs and the body being of weakened configuration adjacent the webs to enable them to be broken away from the remainder of the body.

Claim 29

Dependent Claim 96 words

An injection nozzle for the wall of a liquid containment vessel, for use when injecting substances into the liquid, comprising a nozzle body having at least one injection passage and a passage closing means initially closing said passage, said closing means comprising a fine-grained refractory shell which is resistant to percolation of liquid therethrough, said shell being a generally cylindrical hollow body having a transverse passage-closing web, said shell being of generally "H"-shaped cross-section, and said web being detachable from the shell, in use to create an opening therethrough enabling injection from said passage to commence.

Claim 30

Dependent Claim 96 words

An injection nozzle for the wall of a liquid containment vessel, for use when injecting substances into the liquid, comprising a nozzle body having at least one injection passage and a passage closing means initially closing said passage, said closing means comprising a fine-grained refractory shell which is resistant to percolation of liquid therethrough, said shell being a generally cylindrical hollow body having a transverse passage-closing web, said shell being of generally "H"-shaped cross-section, and said web being detachable from the shell, in use to create an opening therethrough enabling injection from said passage to commence.

Claim 31

Dependent Claim 61 words

A passage closing element for use in an injection nozzle to close an injection passage therein, comprising a fine-grained refractory shell which is resistant to percolation of liquid therethrough, said shell being a hollow body having a transverse web and having a generally "H"-shaped cross-section, said web being detachable from said shell by breaking away from the remainder of said shell.

Claim 32

Dependent Claim 61 words

A passage closing element for use in an injection nozzle to close an injection passage therein, comprising a fine-grained refractory shell which is resistant to percolation of liquid therethrough, said shell being a hollow body having a transverse web and having a generally "H"-shaped cross-section, said web being detachable from said shell by breaking away from the remainder of said shell.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1991-12-06	1992-06-06	1992-12-06	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1995-12-06	1996-06-06	1996-12-06	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1999-12-06	2000-06-06	2000-12-06	$7700.00	Window Closed / Lapsed

Nozzles for injecting substances into liquids

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