US3244199A - Rocket nozzle with adjustable throat - Google Patents

Rocket nozzle with adjustable throat Download PDF

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US3244199A
US3244199A US204757A US20475762A US3244199A US 3244199 A US3244199 A US 3244199A US 204757 A US204757 A US 204757A US 20475762 A US20475762 A US 20475762A US 3244199 A US3244199 A US 3244199A
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truncating
segment
inlet
faces
section
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Hayes Edward James
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Kelsey Hayes Co
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Kelsey Hayes Co
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
    • F02K9/80—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by thrust or thrust vector control
    • F02K9/86—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by thrust or thrust vector control using nozzle throats of adjustable cross- section

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  • an exhaust nozzle assembly is utilized through which hot burning gases are passed to thereby propel the vehicle. It is a primary object of this invention to provide a novel exhaust nozzle assembly having means for selectively varying the thrust of the hot gases from the nozzle.
  • FIGURE 1 is a side elevational view of the novel exhaust nozzle assembly embodying the features of this invention
  • FIGURE 2 is a sectional view of the nozzle assembly of FIGURE 1 taken substantially along the line 2-2 in FIGURE 1;
  • FIGURE 3 is a fragmentary view of the nozzle assembly of FIGURE 1 as viewed in the direction of the arrow indicated by the numeral 3 in FIGURE 1 and depicting the throat area with the nozzle in one condition; and V FIGURE 4 is a fragmentary .view of the nozzle assembly o-f FIGURE 1 as viewed in the direction of the arrow indicated by the numeral 3 in FIGURE land depicting the throat area with the nozzle in a different condition.
  • a nozzle assembly is generally indicated by the numeral and has a nozzle member 11, which, if for the purpose of explanation is initially considered to be of one piece, is provided with a rearwardly disposed conically shaped inlet portion 12 which extends axially outwardly and tapers radially in wardly and blends into a reduced area throat portion 14 which is turn blends into a generally conically shaped axially outwardly extending and radially outwardly flaring outlet portion 16.
  • the internal and external surfaces of the nozzle 11 are similar in general contour.
  • the nozzle 11 has a central axis and is actually made of three parts with a truncating segment 18 extending at an acute angle relative to the central axis 20 of the nozzle member 11 and traversing the throat portion 14 truncating in part, at least, the outlet cone portion 16 and the inlet cone portion 12 (FIGURE 2) to form thereby separate inner and outer sections 22 and 24, respectively.
  • the sections 22 and 24 are secured together by a pair of U-shaped arms 26 and 28.
  • the truncating segment 18 has inner and outer faces 30 and 32, respectively, which lie in a pair of diagonally extending, parallelly disposed planes. These planes also contain the inclinde surfaces 40, 41 on the inner and outer sections 22 and 24, respectively, which matably confront the inner and outer faces 30, 32, respectively, on the truncating segment 18.
  • a guide ring 34 which is circular with respect to an axis 36 perpendicular to the inner face 30, is disposed partially in the inner face 30.
  • the ring 34 fits matably within a circularly shaped grove 38 disposed in the surice face 40 of the inner section 22,
  • the groove 38 defines portions of a circle having its center on the axis 36. Portions of the ring 34 extend radially outwardly on opposite sides of the truncating segment 18 and gear teeth are formed in the outer periphery of one of the portions 42.
  • inlet cone portion 12 and outlet cone portion 16 are both right circular cones, a plane extending perpendicularly with respect to the axis 20 anywhere along the nozzle 1'1 would cut a circular section through both the inner and outer surfaces thereof.
  • a circularly prolate or somewhat elliptically shaped section is defined.
  • a somewhat elliptically shaped aperture is defined in the inner and outer faces 30, 32 and in the inclined surfaces 40, 41.
  • the area of the aperture through the nozzle for flow purposes is that area projected in a plane perpendicular to the direction of flow of the gases and hence perpendicular to the axis 20.
  • the exhaust gases are passed through circular sections which continuously change in area.
  • the somewhat elliptically shaped aperture through the faces 30 and 32 is moved out of alignment with the corresponding somewhat elliptically shaped apertures in the surfaces 40, 41 of the inner and outer sections 22 and 24, respectively.
  • the projected area of the throat portion 14 can be varied by varying the relative position of the aperture in the' truncating section 18 relative to the apertures in the surfaces 40, 41 in the inner and outer segments 22 and 24.
  • a drive gear and motor assembly 44 is secured to the U-shaped arm 26 and has a drive gear 46 in engagement with the gear teeth on the portion 42.
  • the motor for the gear 46 can be either electrically, hydraulically or pneumatically powered and controlled either by automatic or manual means (not shown). While the truncating section 18 is rotated about the axis 36, the arms 26 and 28 maintain the inner and outer segments 22 and 24, respectively, in one position.
  • the inlet portion 12 terminates at its axially innermost portion in a generally annular flange 48 whereby the nozzle assembly 10 can be secured to a missile, rocket, or other similar type aircraft.
  • the area of the throat portion 14 through which the exhaust gases are passed can be varied, hence providing means for varying the thrust of the exhaust gases out of the nozzle 11.
  • the change in area or thrust can be selectively elfectuated by means of the gear and motor assembly 44 and by control means well known in the art.
  • a discharge nozzle assembly comprising a nozzle member having an inlet portion and an outlet portion, a reduced section throat portion disposed between said inlet and said outlet portions, rotatable means or selectively varying the projected area through said throat portion, said means including a rotatable truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally at an acute angle through said throat portion for varying the projected area through said throat portion in accordance with the magnitude of rotation of said truncating segment.
  • a discharge nozzle assembly comprising a nozzle member having an annularly shaped inlet portion and an iannularly shaped outlet portion, a reduced section annular throat portion disposed between said inlet and said outlet portions, means for selectively varying the projected area of said throat portion, said means including a rotatable truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally at an acute angle relative to the axis of said nozzle member through said inlet portion, said throat portion and said outlet portion.
  • a discharge nozzle assembly comprising a nozzle member having an inlet portion, an outlet portion and a reduced section throat portion disposed between said inlet and said outlet portions, means for selectively varying the projected area of said throat portion, said means including a truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally relative to the axis of said nozzle member through said throat portion and dividing said nozzle member into separate inner and outer sections for varying the area of said throat portion in accordance with the magnitude of rotation of said truncating segment about an axis perpendicular'to said parallel planes, said planes defining a pair of inclined surfaces on said inner and outer sections matably confronting said faces on said truncating segment.
  • a discharge nozzle assembly comprising a nozzle member having an lannularly shaped inlet portion and an annularly shaped outlet portion; a reduced section annular throat portion on said nozzle member disposed between said inlet and said outlet portions; rotatable truncating segment means having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion, and said outlet portion and being rotatable for selectively varying the projected area through said throat portion in accordance with the magnitude of rotation; said truncating segment means dividing said nozzle member into an inner and an outer section with said inner and outer sections each having an inclined surface matably confronting one of said faces of said truncating segment.
  • a discharge nozzle assembly comprising a nozzle member having an annularly shaped inlet portion, an annularly shaped outlet portion, and a reduced section annular throat portion disposed between said inlet and said outlet portions; a truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion and said outlet portion with said planes defining a circularly prolate aperture in said inner and outer faces; said truncating segment dividing said nozzle member into an inner and an outer section with said inner and said outer section each having an inclined surface matably confronting one of said faces of said truncating segment and with each of said inclined surf-aces having an aperture similar in shape to that aperture in said inner and outer faces with which said each of said surfaces is individual,
  • a discharge nozzle assembly comprising a nozzle member having an annularly shaped inlet portion, an annularly shaped outlet portion, and a reduced section annular throat portion disposed between said inlet and said outlet portions, a truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion and said outlet portion with said planes defining a circularly prolate aperture in said inner and outer faces, said truncating segment dividing said nozzle member into an inner and an outer section with said inner and said outer section each having an inclined surface matably confronting one of said faces of said truncating segment and with each of said inclined surfaces having an aperture similar in shape to that aperture in said inner and outer faces with which said each of said surfaces is individual, and means rotatably securing said truncating segment between said inner and said outer sections.
  • a discharge nozzle assembly comprising a nozzle member having an annularly shaped inlet portion, an ann-ularly shaped outlet portion, and a reduced section annular throat portion disposed between said inlet and said outlet portions, a truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion and said outlet portion with said planes defining 1a circularly prolate aperture in said inner and outer faces, said truncating segment dividing said nozzle member into an inner and an outer section with said inner and said outer section each having an inclined surface matably confronting one of said faces of said truncating segment and with each of said inclined surfaces having an aperture similar in shape to that aperture in said inner and outer faces with which said each of said surfaces is individual, means rotatably securing said truncating segment between said inner and said outer sections, and means for selectively rotating said truncating segment relative to said inner and outer sections.
  • a discharge nozzle assembly comprising a nozzle member having an 'annularly shaped inlet portion, an annularly shaped outlet portion, and a reduced section annular throat portion disposed between said inlet and said outlet portions, a truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion and said outlet portion with said planes defining a circularly prola-te aperture in said inner and outer faces, said truncating segment dividing said nozzle member into an inner and an outer section with said inner and said outer section each having an inclined surface matably confronting one of said faces of said truncating segment and with each of said inclined surfaces having an aperture similar in shape to that aperture in said inner and outer faces with which said each of said surfaces is individual, a groove defining portions of a circle disposed in one of said surfaces on said inner and outer sections, a circular ring disposed in one of said faces of said truncating segment and matably located Within said groove, and means rotat
  • a discharge nozzle assembly comprising a nozzle member having an annularly shaped inlet portion, an annularly shaped outlet portion, and a reduced section annular throat portion disposed between said inlet and said outlet portions, a truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion and said outlet portion with said planes defining a circularly prolate aperture in said inner and outer faces,
  • said truncating segment dividing said nozzle member into inner and an outer section with said inner and said outer section each having an inclined surface matably confronting one of said faces of said truncating segment and with each of said inclined surfaces having an aperture similar in shape to that aperture in said inner and outer faces with which said each of said surfaces is individual, a groove defining portions of a circle disposed in one of said surfaces of said inner and outer sections, and a circular ring partially disposed in one of said faces of said truncating segment and being partially disposed in said groove and having a portion extending outwardly beyond said one of said faces, gear teeth means disposed on said portion of said ring, and drive means engageable with said gear teeth means for selectively rotating said truncating segment relative to said inner and outer sections.
  • a discharge nozzle assembly comprising a nozzle member having an annularly shaped inlet portion, an annularly shaped outlet portion, and a reduced section annular throat portion disposed between said inlet and said outlet portions, a truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion and said outlet portion with said planes defining a circularly prolate aperture in said inner and outer faces, said truncating segment dividing said nozzle member into an inner and an outer section with said inner and said outer section each having an inclined surface matably confronting one of said faces of said truncating segment and with each of said inclined surfaces having an aperture similar in shape to that aperture in said inner and outer faces With which said each of said surfaces is individual, a groove defining portions of a circle disposed in one of said surfaces in said inner and outer sections, and a circular ring partially disposed in one of said faces of said truncating segment and being partially disposed in said groove and having a portion extending outward
  • a discharge nozzle assembly comprising a nozzle member having an annularly shaped inlet portion, an axially outwardly extending, radially outwardly flaring conical outlet portion, and a reduced section annular throat portion disposed between said inlet and said outlet portions, a truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion and said outlet portion with said planes defining a circularly prolate aperture in said inner and outer faces, said truncating segment dividing said nozzle member into an inner and an outer section with said inner and said outer section each having an inclined surface matably confronting one of said faces of said truncating segment and with each of said inclined surfaces having an aperture similar in shape to that aperture in said inner and outer faces with which said each of said surfaces is individual, a groove defining portions of a circle disposed in one of said surfaces in said inner and outer sections, and a circular ring partially disposed in one of said faces of said truncating segment and being partially
  • a discharge nozzle assembly comprising a nozzle member having an axially outwardly extending, radially inwardly tapering conical inlet portion, an axially outwardly extending, radially outwardly flaring conical outlet portion, and a reduced section annular throat portion disposed between said inlet and said outlet portions, a
  • truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion and said outlet portion with said planes defining a circularly prolate aperture in said inner and outer faces
  • said truncating segment dividing said nozzle member into an inner and an outer section with said inner and said outer section each having an inclined surface matably confronting one of said faces of said truncating segment and with each of said inclined surfaces having an aperture similar in shape to that aperture in said inner and outer faces with which said each of said surfaces is individual, a groove defining portions of a circle disposed in one of said surfaces in said inner and outer sections, and a circularly ring partially disposed in one of said faces of said truncating segment and being partially disposed in said groove and having a portion extending outwardly beyond said one of said faces, gear teeth means disposed on said portion of said ring, and drive means engageable with said gear teeth means for selectively rotating said truncating segment relative to said inner and outer sections.
  • a discharge nozzle assembly comprising a nozzle member having an inlet portion, an outlet portion, and a reduced section throat portion disposed between said inlet and said outlet portions, said inlet portion, outlet portion and throat portion having a generally common axis and with said inlet portion, outlet portion and throat portion having an aperture normally of circular cross-section in a plane perpendicular to said axis said.
  • nozzle member being divided by a separating plane extending through said throat portion at an acute angle relative to said axis with said separating plane defining a circularly prolate aperture in the mating surfaces of the sections of said nozzle member on opposite sides of said separating plane, and means for selectively rotating said sections on opposite sides of said separating plane relative to each other whereby the projected area through said throat portion can be varied.

Description

April 5, 1966 Q I E. J. HAYES 3,244,199
ROCKET NOZZLE WITH ADJUSTABLE THROAT Filed June 25, 1962 IN VENTOR.
2 1M471 J7 flayed United States Patent 3 244 199 uocxar NozzLE wrrrr ADJUSTABLE THROAT Edward James Hayes, Livonia, Mich., assignor to Kelsey- Hayes Company, Romulus, MiclL, a corporation of Delaware Filed June 25, 1962, Ser. No. 204,757 13 Claims. (Cl. 138-45) This invention relates to nozzles for directing fluid fiow and more particularly to exhaust nozzles for use on propulsively driven rockets, missiles, or the like.
In the propulsion of jet aircraft, rockets or missiles an exhaust nozzle assembly is utilized through which hot burning gases are passed to thereby propel the vehicle. It is a primary object of this invention to provide a novel exhaust nozzle assembly having means for selectively varying the thrust of the hot gases from the nozzle.
It is a further object of this invention to provide a ,novel exhaust nozzle assembly having a nozzle with a throat portion the area of which is selectively variable to thereby vary the magnitude of the thrust of the hot gases discharged through the nozzle.
Other objects, features, and advantages of the present invention will become apparent from the subsequent description and the appended claims, taken in conjunction with the accompanying drawing, in which:
FIGURE 1 is a side elevational view of the novel exhaust nozzle assembly embodying the features of this invention;
FIGURE 2 is a sectional view of the nozzle assembly of FIGURE 1 taken substantially along the line 2-2 in FIGURE 1;
FIGURE 3 is a fragmentary view of the nozzle assembly of FIGURE 1 as viewed in the direction of the arrow indicated by the numeral 3 in FIGURE 1 and depicting the throat area with the nozzle in one condition; and V FIGURE 4 is a fragmentary .view of the nozzle assembly o-f FIGURE 1 as viewed in the direction of the arrow indicated by the numeral 3 in FIGURE land depicting the throat area with the nozzle in a different condition.
Looking now to the drawing, a nozzle assembly is generally indicated by the numeral and has a nozzle member 11, which, if for the purpose of explanation is initially considered to be of one piece, is provided with a rearwardly disposed conically shaped inlet portion 12 which extends axially outwardly and tapers radially in wardly and blends into a reduced area throat portion 14 which is turn blends into a generally conically shaped axially outwardly extending and radially outwardly flaring outlet portion 16. The internal and external surfaces of the nozzle 11 are similar in general contour. The nozzle 11 has a central axis and is actually made of three parts with a truncating segment 18 extending at an acute angle relative to the central axis 20 of the nozzle member 11 and traversing the throat portion 14 truncating in part, at least, the outlet cone portion 16 and the inlet cone portion 12 (FIGURE 2) to form thereby separate inner and outer sections 22 and 24, respectively. The sections 22 and 24 are secured together by a pair of U-shaped arms 26 and 28. The truncating segment 18 has inner and outer faces 30 and 32, respectively, which lie in a pair of diagonally extending, parallelly disposed planes. These planes also contain the inclinde surfaces 40, 41 on the inner and outer sections 22 and 24, respectively, which matably confront the inner and outer faces 30, 32, respectively, on the truncating segment 18.
A guide ring 34, which is circular with respect to an axis 36 perpendicular to the inner face 30, is disposed partially in the inner face 30. The ring 34 fits matably within a circularly shaped grove 38 disposed in the surice face 40 of the inner section 22, The groove 38 defines portions of a circle having its center on the axis 36. Portions of the ring 34 extend radially outwardly on opposite sides of the truncating segment 18 and gear teeth are formed in the outer periphery of one of the portions 42.
Since the inlet cone portion 12 and outlet cone portion 16 are both right circular cones, a plane extending perpendicularly with respect to the axis 20 anywhere along the nozzle 1'1 would cut a circular section through both the inner and outer surfaces thereof. However, with the faces 30 and 32 of the truncating section 18 inclined diagonally or at an acute angle with respect to the axis 20, a circularly prolate or somewhat elliptically shaped section is defined. Since the internal and external surfaces of the truncating section 18 and of the inner and outer sections 22 and 24 are similar, a somewhat elliptically shaped aperture is defined in the inner and outer faces 30, 32 and in the inclined surfaces 40, 41.
Since the exhaust gases pass through the nozzle 11 in a direction parallel to the axis 20, the area of the aperture through the nozzle for flow purposes is that area projected in a plane perpendicular to the direction of flow of the gases and hence perpendicular to the axis 20. With the assembly 10 in the condition as shown in FIGURE 2, the exhaust gases are passed through circular sections which continuously change in area. By rotating the truncating segment 18 about the axis 36, the somewhat elliptically shaped aperture through the faces 30 and 32 is moved out of alignment with the corresponding somewhat elliptically shaped apertures in the surfaces 40, 41 of the inner and outer sections 22 and 24, respectively. Since rotation of the truncating segment 18 from the aligned position shown in FIGURES 1 and 2 moves what could be considered as the minor axis of its aperture toward the major axes of the apertures in surfaces 40 and 42, an intenference in the throat portion 14 results whereby the projected area therethrough is reduced (see FIGURE 4). Maximum interference, and minimum projected area are obtained whenthe minor axis of the somewhat elliptical aperture of the truncating section 18 is brought in alignment with the major axes of the elliptical apertures in the surfaces 40, 41 in the inner and outer sections 22, 24.: Thus, the projected area of the throat portion 14 can be varied by varying the relative position of the aperture in the' truncating section 18 relative to the apertures in the surfaces 40, 41 in the inner and outer segments 22 and 24.
To provide rotation of the segment 18 a drive gear and motor assembly 44 is secured to the U-shaped arm 26 and has a drive gear 46 in engagement with the gear teeth on the portion 42. The motor for the gear 46 can be either electrically, hydraulically or pneumatically powered and controlled either by automatic or manual means (not shown). While the truncating section 18 is rotated about the axis 36, the arms 26 and 28 maintain the inner and outer segments 22 and 24, respectively, in one position.
The inlet portion 12 terminates at its axially innermost portion in a generally annular flange 48 whereby the nozzle assembly 10 can be secured to a missile, rocket, or other similar type aircraft.
Thus it can be seen that by rotating the truncating section 18, the area of the throat portion 14 through which the exhaust gases are passed can be varied, hence providing means for varying the thrust of the exhaust gases out of the nozzle 11. The change in area or thrust can be selectively elfectuated by means of the gear and motor assembly 44 and by control means well known in the art.
While it will be apparent that the preferred embodiments of the invention disclosed are well calculated to fulfill the objects above stated, it will be appreciated that the invention is susceptible to modification, variation and change Without departing from the proper scope or fair meaning of the subjoined claims.
What is claimed is:
1. A discharge nozzle assembly comprising a nozzle member having an inlet portion and an outlet portion, a reduced section throat portion disposed between said inlet and said outlet portions, rotatable means or selectively varying the projected area through said throat portion, said means including a rotatable truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally at an acute angle through said throat portion for varying the projected area through said throat portion in accordance with the magnitude of rotation of said truncating segment.
2. A discharge nozzle assembly comprising a nozzle member having an annularly shaped inlet portion and an iannularly shaped outlet portion, a reduced section annular throat portion disposed between said inlet and said outlet portions, means for selectively varying the projected area of said throat portion, said means including a rotatable truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally at an acute angle relative to the axis of said nozzle member through said inlet portion, said throat portion and said outlet portion.
3. A discharge nozzle assembly comprising a nozzle member having an inlet portion, an outlet portion and a reduced section throat portion disposed between said inlet and said outlet portions, means for selectively varying the projected area of said throat portion, said means including a truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally relative to the axis of said nozzle member through said throat portion and dividing said nozzle member into separate inner and outer sections for varying the area of said throat portion in accordance with the magnitude of rotation of said truncating segment about an axis perpendicular'to said parallel planes, said planes defining a pair of inclined surfaces on said inner and outer sections matably confronting said faces on said truncating segment.
4. A discharge nozzle assembly comprising a nozzle member having an lannularly shaped inlet portion and an annularly shaped outlet portion; a reduced section annular throat portion on said nozzle member disposed between said inlet and said outlet portions; rotatable truncating segment means having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion, and said outlet portion and being rotatable for selectively varying the projected area through said throat portion in accordance with the magnitude of rotation; said truncating segment means dividing said nozzle member into an inner and an outer section with said inner and outer sections each having an inclined surface matably confronting one of said faces of said truncating segment.
5. A discharge nozzle assembly comprising a nozzle member having an annularly shaped inlet portion, an annularly shaped outlet portion, and a reduced section annular throat portion disposed between said inlet and said outlet portions; a truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion and said outlet portion with said planes defining a circularly prolate aperture in said inner and outer faces; said truncating segment dividing said nozzle member into an inner and an outer section with said inner and said outer section each having an inclined surface matably confronting one of said faces of said truncating segment and with each of said inclined surf-aces having an aperture similar in shape to that aperture in said inner and outer faces with which said each of said surfaces is individual,
d and means rotatably supporting one of said truncating seg ment, said inner section and said outer section for rotation relative to another of said truncating segment, said inner section and said outer section.
6. A discharge nozzle assembly comprising a nozzle member having an annularly shaped inlet portion, an annularly shaped outlet portion, and a reduced section annular throat portion disposed between said inlet and said outlet portions, a truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion and said outlet portion with said planes defining a circularly prolate aperture in said inner and outer faces, said truncating segment dividing said nozzle member into an inner and an outer section with said inner and said outer section each having an inclined surface matably confronting one of said faces of said truncating segment and with each of said inclined surfaces having an aperture similar in shape to that aperture in said inner and outer faces with which said each of said surfaces is individual, and means rotatably securing said truncating segment between said inner and said outer sections.
7. A discharge nozzle assembly comprising a nozzle member having an annularly shaped inlet portion, an ann-ularly shaped outlet portion, and a reduced section annular throat portion disposed between said inlet and said outlet portions, a truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion and said outlet portion with said planes defining 1a circularly prolate aperture in said inner and outer faces, said truncating segment dividing said nozzle member into an inner and an outer section with said inner and said outer section each having an inclined surface matably confronting one of said faces of said truncating segment and with each of said inclined surfaces having an aperture similar in shape to that aperture in said inner and outer faces with which said each of said surfaces is individual, means rotatably securing said truncating segment between said inner and said outer sections, and means for selectively rotating said truncating segment relative to said inner and outer sections.
8. A discharge nozzle assembly comprising a nozzle member having an 'annularly shaped inlet portion, an annularly shaped outlet portion, and a reduced section annular throat portion disposed between said inlet and said outlet portions, a truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion and said outlet portion with said planes defining a circularly prola-te aperture in said inner and outer faces, said truncating segment dividing said nozzle member into an inner and an outer section with said inner and said outer section each having an inclined surface matably confronting one of said faces of said truncating segment and with each of said inclined surfaces having an aperture similar in shape to that aperture in said inner and outer faces with which said each of said surfaces is individual, a groove defining portions of a circle disposed in one of said surfaces on said inner and outer sections, a circular ring disposed in one of said faces of said truncating segment and matably located Within said groove, and means rotatably supporting one of said truncating segment, said inner section and said outer section for rotation relative to another of said truncating segment, said inner section and said outer section.
9. A discharge nozzle assembly comprising a nozzle member having an annularly shaped inlet portion, an annularly shaped outlet portion, and a reduced section annular throat portion disposed between said inlet and said outlet portions, a truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion and said outlet portion with said planes defining a circularly prolate aperture in said inner and outer faces,
said truncating segment dividing said nozzle member into inner and an outer section with said inner and said outer section each having an inclined surface matably confronting one of said faces of said truncating segment and with each of said inclined surfaces having an aperture similar in shape to that aperture in said inner and outer faces with which said each of said surfaces is individual, a groove defining portions of a circle disposed in one of said surfaces of said inner and outer sections, and a circular ring partially disposed in one of said faces of said truncating segment and being partially disposed in said groove and having a portion extending outwardly beyond said one of said faces, gear teeth means disposed on said portion of said ring, and drive means engageable with said gear teeth means for selectively rotating said truncating segment relative to said inner and outer sections.
10. A discharge nozzle assembly comprising a nozzle member having an annularly shaped inlet portion, an annularly shaped outlet portion, and a reduced section annular throat portion disposed between said inlet and said outlet portions, a truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion and said outlet portion with said planes defining a circularly prolate aperture in said inner and outer faces, said truncating segment dividing said nozzle member into an inner and an outer section with said inner and said outer section each having an inclined surface matably confronting one of said faces of said truncating segment and with each of said inclined surfaces having an aperture similar in shape to that aperture in said inner and outer faces With which said each of said surfaces is individual, a groove defining portions of a circle disposed in one of said surfaces in said inner and outer sections, and a circular ring partially disposed in one of said faces of said truncating segment and being partially disposed in said groove and having a portion extending outwardly beyond said one of said faces, gear teeth means disposed on said portion of said ring, and drive means engageable with said gear teeth means for selectively rotating said truncating segment relative to said inner and outer sections and means for holding said inner and said outer sections together.
11. A discharge nozzle assembly comprising a nozzle member having an annularly shaped inlet portion, an axially outwardly extending, radially outwardly flaring conical outlet portion, and a reduced section annular throat portion disposed between said inlet and said outlet portions, a truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion and said outlet portion with said planes defining a circularly prolate aperture in said inner and outer faces, said truncating segment dividing said nozzle member into an inner and an outer section with said inner and said outer section each having an inclined surface matably confronting one of said faces of said truncating segment and with each of said inclined surfaces having an aperture similar in shape to that aperture in said inner and outer faces with which said each of said surfaces is individual, a groove defining portions of a circle disposed in one of said surfaces in said inner and outer sections, and a circular ring partially disposed in one of said faces of said truncating segment and being partially disposed in said groove and having a portion extending outwardly beyond said one of said faces, gear teeth means disposed on said portion of said ring, and drive means engageable with said gear teeth means for selectively rotating said truncating segment relative to said inner and outer sections.
12. A discharge nozzle assembly comprising a nozzle member having an axially outwardly extending, radially inwardly tapering conical inlet portion, an axially outwardly extending, radially outwardly flaring conical outlet portion, and a reduced section annular throat portion disposed between said inlet and said outlet portions, a
truncating segment having inner and outer faces defined by a pair of parallel planes extending diagonally through said inlet portion, said throat portion and said outlet portion with said planes defining a circularly prolate aperture in said inner and outer faces, said truncating segment dividing said nozzle member into an inner and an outer section with said inner and said outer section each having an inclined surface matably confronting one of said faces of said truncating segment and with each of said inclined surfaces having an aperture similar in shape to that aperture in said inner and outer faces with which said each of said surfaces is individual, a groove defining portions of a circle disposed in one of said surfaces in said inner and outer sections, and a circularly ring partially disposed in one of said faces of said truncating segment and being partially disposed in said groove and having a portion extending outwardly beyond said one of said faces, gear teeth means disposed on said portion of said ring, and drive means engageable with said gear teeth means for selectively rotating said truncating segment relative to said inner and outer sections.
13. A discharge nozzle assembly comprising a nozzle member having an inlet portion, an outlet portion, and a reduced section throat portion disposed between said inlet and said outlet portions, said inlet portion, outlet portion and throat portion having a generally common axis and with said inlet portion, outlet portion and throat portion having an aperture normally of circular cross-section in a plane perpendicular to said axis said.
nozzle member being divided by a separating plane extending through said throat portion at an acute angle relative to said axis with said separating plane defining a circularly prolate aperture in the mating surfaces of the sections of said nozzle member on opposite sides of said separating plane, and means for selectively rotating said sections on opposite sides of said separating plane relative to each other whereby the projected area through said throat portion can be varied.
References Cited by the Examiner UNITED STATES PATENTS 917,970 4/1909 Smith et al 13845 2,590,272 3/ 1952 Robertson et a1. 2,612,747 10/1952 Skinner. 2,933,889 4/ 1960 Tockmitt 6035.54 X 2,987,874 6/1961 Nicholson 6035.6
MARK NEWMAN, Primary Examiner.
A RAM BLUM, SAMUEL LEVINE, Exa iners.

Claims (1)

13. A DISCHARGE NOZZLE ASSEMBLY COMPRISING A NOZZLE MEMBER HAVING AN INLET PORTION, AN OUTLET PORTION AND A REDUCED SECTION THROAT PORTION DISPOSED BETWEEN SAID INLET AND SAID OUTLET PORTIONS, SAID INLET PORTION, OUTLET PORTION AND THROAT PORTION HAVING A GENERALLY COMMON AXIS AND WITH SAID INLET PORTION, OUTLET PORTION AND THROAT PORTION HAVING AN APERTURE NORMALLY OF CIRCULAR CROSS-SECTION IN A PLANE PERPENDICULAR TO SAID AXIS SAID NOZZLE MEMBER BEING DIVIDED BY A SEPARATING PLANE EXTENDING THROUGH SAID THROAT PORTION AT AN ACUTE ANGLE
US204757A 1962-06-25 1962-06-25 Rocket nozzle with adjustable throat Expired - Lifetime US3244199A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534908A (en) * 1967-11-02 1970-10-20 North American Rockwell Variable geometry nozzle
US5326468A (en) * 1992-03-02 1994-07-05 Cox Dale W Water remediation and purification method and apparatus
US5947157A (en) * 1995-12-11 1999-09-07 Kindersley; Peter Throttling device and element
US11084605B2 (en) * 2016-02-05 2021-08-10 Bayern-Chemie Gesellschaft Für Flugchemische Antriebe Mbh Device and system for controlling missiles and kill vehicles operated with gel-like fuels

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US917970A (en) * 1908-09-05 1909-04-13 James G Smith Oil-gate.
US2590272A (en) * 1948-06-21 1952-03-25 Boeing Co Adjustable jet orifice
US2612747A (en) * 1945-01-25 1952-10-07 Leslie A Skinner Rocket having adjustable discharge passage
US2933889A (en) * 1959-04-14 1960-04-26 Richard G Tolkmitt Thrust cut-off apparatus for rocket motors
US2987874A (en) * 1954-03-15 1961-06-13 Carborundum Co Ceramic lined, light weight rocket motor nozzles and like devices

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US917970A (en) * 1908-09-05 1909-04-13 James G Smith Oil-gate.
US2612747A (en) * 1945-01-25 1952-10-07 Leslie A Skinner Rocket having adjustable discharge passage
US2590272A (en) * 1948-06-21 1952-03-25 Boeing Co Adjustable jet orifice
US2987874A (en) * 1954-03-15 1961-06-13 Carborundum Co Ceramic lined, light weight rocket motor nozzles and like devices
US2933889A (en) * 1959-04-14 1960-04-26 Richard G Tolkmitt Thrust cut-off apparatus for rocket motors

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534908A (en) * 1967-11-02 1970-10-20 North American Rockwell Variable geometry nozzle
US5326468A (en) * 1992-03-02 1994-07-05 Cox Dale W Water remediation and purification method and apparatus
US5393417A (en) * 1992-03-02 1995-02-28 Cox; Dale W. Water remediation and purification system and method
US5494585A (en) * 1992-03-02 1996-02-27 Cox; Dale W. Water remediation and purification system and method
US5947157A (en) * 1995-12-11 1999-09-07 Kindersley; Peter Throttling device and element
US11084605B2 (en) * 2016-02-05 2021-08-10 Bayern-Chemie Gesellschaft Für Flugchemische Antriebe Mbh Device and system for controlling missiles and kill vehicles operated with gel-like fuels

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