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Publication numberUS2958504 A
Publication typeGrant
Publication dateNov 1, 1960
Filing dateNov 7, 1955
Priority dateNov 7, 1955
Publication numberUS 2958504 A, US 2958504A, US-A-2958504, US2958504 A, US2958504A
InventorsLindgren William L
Original AssigneeTurner Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Torch control valve
US 2958504 A
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Description  (OCR text may contain errors)

United States Patent TORCH CONTROL VALVE William L. Lindgren, Sycamore, Ill., assignor to Turner Corporation, a corporation of Illinois Filed Nov. 7, 1955, Ser. No. 545,333

9 Claims. (Cl. 251-223) This invention relates to a torch and, more particularly, to a torch construction wherein a pilot flame may be converted to a working flame by means of a finger tip control member.

The general object of this invention is to provide a new and improved torch control valve.

Another object of this invention is to provide a new and improved hand torch which is extremely simple to operate and which results in a substantial saving of both fuel and time.

Another object of this invention is to provide a new and improved hand torch comprising a burner nozzle, a disposable fuel tank and valve means disposed therebetween having a conventional flame adjustment and a convenient finger tip trigger member for converting a pilot flame to a working flame.

A more detailed object of this invention is to provide a control valve for a torch having a burner nozzle, a fuel supply and a connecting member disposed therebetween having a fuel passage including a valve orifice, the valve including a valve housing secured to the connecting member, a needle valve member mounted in said valve housing and adapted to open and close the valve orifice, the needle member having a threaded portion loosely fitted in a threaded portion of the housing so as to allow longitudinal movement of the needle member toward and away from the valve orifice within the play in the housing threads, resilient means urging the needle member towards the valve orifice, a knob on the needle member for conventional flame adjustment and a captive lever between the housing and the knob adapted to be pivoted about an edge of the valve housing to move the needle member away from the valve orifice to the extent of the play in the threads, the lever having a portion extending alongside the fuel tank for convenient finger top control when grasping the torch.

Other objects and advantages will become apparent from the following detailed description taken in connection with the accompanying drawings, in which:

Fig. l is an enlarged fragmentary side elevational view of a hand torch embodying this invention with the valve structure shown in vertical section;

Fig. 2 is a vertical sectional view taken generally along line 2-2 of Fig. 1;

Fig. 3 is a vertical sectional view taken generally along line 33 of Fig. 1; and Fig. 4 is an enlarged fragmentary sectional view of the thread connection between the needle member and its housing.

While the invention herein described is a preferred embodiment, it is not intended to limit the invention to the specific form and arrangements shown, it being contemplated that various changes may be made by those skilled in the art without departing from the spirit and scope of the appended claims.

The valve structure of the present invention is illustrated as connected to a bottle of liquified petroleum gas, ordinarily propane. Torches of this variety are "ice used in many places requiring a readily portable source of concentrated high heat. The bottles are of a size to be easily grasped by a workman with one hand. The valve of this invention permits the torch to be selectively set at a pilot flame in readiness for use. When the workman needs the torch, he may pick it up in one hand, press the trigger or lever and instantly have a full flame emitting from the torch.

Referring now to Fig. 1, there is shown a disposable fuel tank 1 having a threaded fuel outlet portion 2, a Valve structure, generally indicated at 3, which is threadably secured on the threaded portion 2 of the fuel tank 1 and a burner nozzle 4 connected to the valve structure 3 through a tube 5 having a threaded portion 6 secured in the valve structure 3.

The valve structure 3 comprises a member '7 having a fuel passage extending therethrough including passages 8 and 9, a valve orifice 10 formed therebetween, and a valve means 11 disposed between the fuel tank 1 and the passage 9. The valve means 11 is of the type that automatically allows fuel to flow from the fuel tank 1 to the passage 9 in the member 7 when the member 7 is positioned on the fuel tank 1 and may comprise a conventional tire valve in the fuel tank outlet portion 2 with a projecting member on the member 7 operable to depress the spring'urged core of the tire valve. Such a structure is disclosed in more detail in applicants pending application, Serial No. 439,967,. filed June 29, 1954, now Patent No. 2,888,979.

To control the passage of fuel through the valve orifice 10, the control valve indicated generally at 12 is provided. The control valve 12 includes a valve housing or packing nut 13 which is threadably mounted in a stepped bore 14 in the member 7 with a gasket 15 being disposed between the housing 13 and the member 7, the stepped bore 14 communicating with the fuel passage in the member 7. The housing 13 is fixedly secured in the member 7 by driving a lock pin 16 through the housing 13 and into a bore 17 in the member 7 intercepting the threaded portion of the housing 13, as shown in Fig. 2, and extending outwardly from the housing 13.

A needle valve member 21 having a valve tip 22 adapted to close the valve orifice 10 and a shank portion 23 is mounted in a bore 18 in the housing 13, an O-ring 24 being disposed between the needle valve shank portion 23 and the stepped bore 14. An enlarged threaded portion 25 of the needle valve member 21 is loosely threaded in an internal threaded portion 26 of the housing bore 18 so as to allow longitudinal movement of the needle valve 21 toward and away from the valve orifice 10 within the play between the threads of the portion 25 and the housing threads 26.

As viewed in the enlarged illustration of Fig. 4, the threads of the valve member enlargement 25 have some play in the threads 26 of the housing 13 that permit movement of the needle member 21 toward or away from the valve orifice 10. Only a few thousandths of an inch of such movement may change the character of the flame emitting from the torch nozzle 4. Resilient means, such as a spring 28 urges the needle member to the left hand limit permitted by the thread play, which is illustrated in exaggerated form for clarity.

The spring 28 is disposed in the housing bore 18 between the enlarged threaded portion 25 of the needle valve member 21 and the housing 13 to urge the enlarged threaded portion 25 of the needle valve member 21 against the orifice valve side of the housing threads 26 of the housing 13. The play in the threads is taken up by the spring 28 urging the valve member 21 always toward the orifice 10 tending to keep the valve member 21 toward the closed position of the valve within the 3. limit of movement permitted by the play in the threads, as illustrated in Fig. 4.

The needle valve member 21 has a portion 29 extending outwardly from the housing 13 which is adapted to receive a knurled knob 30 adapted for conventional opening and closing adjustment of the valve orifice lit by turning the knob 30. As shown in Fig. 1, the knob 30 is spaced from the housing 13. To provide convenient and fast opening of the orifice valve it an operating member or lever 32 is provided which is loosely captive in the space defined between the housing 13 and the knob 30. As shown best in Fig. 3, the lever 32 has a bore 33 loosely surrounding the shank 23 of the needle valve 21 and a bore 34 loosely surrounding the outwardly extending portion of the lock pin 16. Since the lever is thus impaled on both the needle member 21 and pin 16, it can rotate around neither. The lever 32 has a portion 35 extending alongside the fuel tank 1 adapted to provide a convenient finger tip control when a person is grasping the torch. By moving the extending portion 35 of the lever 32 towards the fuel tank 1, the lever- 32 pivots about the edge 36 of the housing 13, as a fulcrum, so as to move the needle valve member 21 away from the valve orifice 10, the threads on the enlarged portion 25 of the needle valve member 21 being moved against the action of the spring 28 from the orifice valve side of the housing threads 26 to the opposite side of the housing threads 26. When the lever 32 is released, the spring 28 moves the needle valve member 21 back towards the valve orifice 10. Fitting the lever 32 over both the shank 23 of the needle valve 21 and the outwardly extending portion of the lock pin 16 prevents rotation of the portion 35 of the lever 32 away from its normal convenient operating position alongside the fuel tank 1.

For non-intermittent operation of this torch, the conventional control knob 36 may be utilized to open the valve orifice the desired amount to provide the desired steady flame for continuous use. If a Working flame is only intermittently required, the knob 30 is opened just enough to provide a low or pilot flame. Then, whenever a working or full flame is desired the operator merely actuates the lever 32 which quickly moves the needle valve a further distance from the valve orifice 10 to provide a full or working flame. Thus, a substantially large saving in fuel results during intermittent torch operation as a result of the torch construction disclosed herein having a finger tip control for converting a pilot flame to a working flame.

In a preferred form of the present invention, the fuel tank has a diameter about one-half the size illustrated in Fig. 1 with the other parts in relative size. The movement required of the lever portion 35 is quite small and very little force is required to eflect the instant change of the flame from a pilot tofull size. The needle member of the valve in the preferred form need only be moved about .005 inch to effect the change mentioned. This amount of movement may be easily provided in aloose thread between the needle valve member and housing threads.

I claim:

1. A control valve for a hand torch, comprising; a valve housing having a fluid passage, a valve member movable in said housing and adapted to open and close said passage, said valve member having a threaded portion loosely threaded in the housing, resilient means urging said valve member toward said fluid passage, a knob secured to the valve member for turning the valve memher away from and toward the passage and a lever mounted for moving the valve member to an extent permitted by the loose threads to open said fluid passage from a pilot rate of flow to a greater rate of flow without turning the knob.

2. A control valve for a hand torch comprising; a valve housing having a fluid passage formed therein including a valve orifice, a needle valve member in said housing adapted to open and close said valve orifice and having an operating portion extending externally of the housing, said needle valve member having a portion loosely threaded in said housing to allow longitudinal movement of the valve member toward and away from the valve orifice within the play of the threads, resilient means urging the needle valve member toward the valve orifice, a knob secured to the external portion of the needle valve member for turning the needle valve member to open and close the valve orifice, said knob being spaced from the valve housing, and operating means disposed between the housing and the knob for opening the needle valve member to a full flow position from a pilot flow position, selected by the knob setting, said operating means moving the needle valve member against the resilient means and away from the valve orifice to the extent of the play in the threads.

3. A control valve comprising; a valve housing having a fluid passage, a valve member movable in said housing to open and close said passage, said valve member having a threaded portion loosely threaded in said housing, resilient means urging said valve member to close said passage, means secured to said valve member for rotatably opening and closing said passage, and a pivotably mounted lever operably connected to said valve member and adapted when pivoted from its normal position about an axis normal to the direction of movement of said valve member to shift said valve member longitudinally against the action of said resilient means to open said passage to an extent permitted by the loose threads,

4. In a trigger operable control valve, a valve body having a fluid passage therein and a valve seat in the passage, a valve member movable in the valve body toward and away from the valve seat in valve closing and valve opening directions, a sleeve positioned in the valve body and having an annular spring seat surrounding the valve member, a spring bearing against the spring seat and urging the valve member in a valve closing direction, a lock pin generally parallel to the valve member extending through the sleeve and into the valve body for holding the sleeve in position, an abutment on the valve member outwardly of the valve body, and a trigger lever having a midportion loosely surrounding said lock pin and engageable with an edge of said sleeve to pivot thereabout, one end portion manually accessible for pivoting the lever, and an opposite end portion loose on said valve member and engageable with the abutment on the valve member to move the valve member in a valve opening direction in opposition to said spring on pivotal movement of the lever.

5. A control valve, comprising, a valve housing havlng a fluid passage therein and a valve orifice in the fluid passage, a valve member axially movable in the valve housing toward and away from the valve orifice to close and open the passage, a sleeve in the housing encircling the valve member, said valve member having an intermediate portion loosely threaded in the sleeve by means of cooperating threads on the valve member and in the sleeve permitting axial movement of the valve member relative to the sleeve, means yieldably urging the valve member in a valve closing direction, a manually accessible part on the valve memberfor threadably adjusting the valve member from a valve closed position to a partially open position, and a trigger lever pivotally mounted on the valve housing and connected to the valve member for quickly shifting the valve member axially in a valve opening direction from a partially open position to a fully open position within limits determined by longitudinal movement of the valve member threads in the sleeve threads.

6. A control valve, comprising, a valve housing having a fluid passage therein and a valve orifice in the passage, a needle valve member axially movable in the valve housing toward and away from the valve orifice to close and open the passage, a concentric sleeve in the valve housing encircling the valve member in spaced relation thereto and having an internally threaded portion, said valve member having an enlarged intermediate portion externally threaded with threads loosely fitting the sleeve threads to permit longitudinal movement of the valve member relative to the sleeve, an annular spring seat in the sleeve near the outer end thereof, and a coiled compression spring in the sleeve encircling the valve member and bearing against the spring seat and the enlarged portion of the valve member to urge the valve member in a valve closing direction, a manually accessible knob on the outer end of the valve member for threadably adjusting the valve member in the sleeve from a valve closed position to a partially open position, and a trigger lever pivoted on the sleeve and connected to the valve member for quickly shifting the valve member axially in opposition to said spring from a partially open position to a fully open position within limits determined by movement of the valve member threads in the sleeve threads.

7. A control valve for a hand torch or the like, comprising, a valve housing having a fluid passage therein and a valve orifice in the fluid passage, a valve member axially movable in the valve housing toward and away from the valve orifice to close and open the passage, said valve housing having means forming an internally threaded bore concentric with the valve member, said valve member having a portion thereof externally threaded with threads loosely fitting the threads of said bore to permit a predetermined axial movement of the valve member in the bore without rotation of the valve member, resilient means urging the valve axially in the bore in a valve closing direction, a part on the valve member engageable for rotating the same to threadably adjust the valve member between a valve closed position and a partially open position, and said resilient means being yieldable to permit quick axial movement of the valve member from a partially open position to a fully open position within limits determined by axial movement of the valve member threads in the bore threads.

8. A control valve for use in a gas appliance to regulate the flow of fuel to a point of utilization, comprising, a valve body having a fluid passage therein and a valve seat in the fluid passage, a valve stem loosely threaded in said valve body for linear axial movement within the limits of the looseness between the threads and for rotational axial movement within the limits of the threaded relationship between the stem and the valve body, said stem being movable towards the valve seat in a valve closing direction and outwardly of the valve body away from the valve seat in a valve opening direction, continuous biasing means yieldably urging said valve stem inwardly of said valve body in a valve closing direction, finger manipulable means co-rotatably connected to said valve stem to rotationally axially adjust said stem, and a trigger lever having a mid portion pivoted on said valve body on an axis normal to the valve axis, said trigger lever having one end portion operatively connected to said valve stem and a second manually accessible end portion movable towards the valve body to selectively linearly adjust said valve stem.

9. In a trigger operable control valve, a valve body having a fluid passage therein and a valve seat in the passage, a valve member movable in the valve body toward and away from the valve seat in valve closing and valve opening directions, a sleeve positioned in the valve body and having an annular spring seat surrounding the valve member, a spring bearing against the spring seat and urging the valve member in a valve closing direction, a lock pin generally parallel to the valve member extending into the valve body and contacting the sleeve so as to hold it in position, an abutment on the valve member outwardly of the valve body, and a trigger lever having a midportion loosely surrounding said lock pin and engageable with an edge of said sleeve to pivot thereabout, one end portion manually accessible for pivoting the lever, and an opposite end portion loose on said valve member and engageable with the abutment on the valve member to move the valve member in a valve opening direction in opposition to said spring on pivotal movement of the lever.

References Cited in the file of this patent UNITED STATES PATENTS 1,280,068 Moorhouse Sept. 24, 1918 1,740,602 Keeler Dec. 24, 1929 2,035,202 Smith Mar. 24, 1936 2,388,327 Jacobson et al. Nov. 6, 1945 2,655,041 Jacobsson Oct. 31, 1953 2,672,186 Smith Mar. 16, 1954 2,683,484 Falligant July 13, 1954 2,715,010 Reeves Aug. 9, 1955

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
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US2683484 *Oct 30, 1950Jul 13, 1954Prepo CorpPortable blowtorch and the like
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3125153 *Dec 6, 1961Mar 17, 1964 Backfire torch
US3240230 *Oct 25, 1962Mar 15, 1966Nuclear Products CompanyCross pattern metering valve
US3275060 *Dec 18, 1963Sep 27, 1966Turner CorporationCombined propane torch and igniter assembly
US4118007 *Mar 17, 1977Oct 3, 1978Gould Inc.Valve structure
US4417601 *Dec 19, 1980Nov 29, 1983National Foam Systems, Inc.Variable proportioning valve for balanced pressure proportioning systems, and system containing the valve
US4615485 *Jun 10, 1985Oct 7, 1986Graco Inc.Paint circulation adapter and coupler
US4746095 *Sep 14, 1987May 24, 1988Anderson, Greenwood & Co.Bonnet lock
US5249773 *Nov 12, 1992Oct 5, 1993Kohler Co.Fluid flow regulating valve
Classifications
U.S. Classification251/223, 251/289, 251/240, 251/227
International ClassificationF16K1/30, F16K1/00, F16K35/02, F16K35/00
Cooperative ClassificationF16K35/025, F16K1/302
European ClassificationF16K35/02R2, F16K1/30A2