US2302306A

US2302306A - Fluid delivery gun

Info

Publication number: US2302306A
Application number: US286041A
Authority: US
Inventors: Victor S Faast
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-07-22
Filing date: 1939-07-22
Publication date: 1942-11-17
Anticipated expiration: 1959-11-17

Description

vr. s. Fi'AAsT Nov. I7, 1942.

FLUID DELIvERY GUN Filed Juiy 22. 1959 wm. mm

l//CTOE 5. 51,457)

ENTOR.

Patented Nov. 17, 1942 [-,UNITED STTES ''LN' `QFFICE 1 rhum DELIVERY GUN V' Victor S.. Faast, Santa Paula, Calif. Applicants July 22, 1039, serial No. 286,041 v (crei-73) 4 Claims.

rhis invention relatesv to a iiuid delivery gun intended principally forinjecting liquid into wood or other. materials, but also capable of being lused for a variety of other purposes. f j :An important objectofy the invention is `to providea gun of the kind stated which is adapted to be used for the purpose of rapidly impregnating the timbers of a building with an insecticide fatal to the varioustypes of termites which frequently injure Wooden building structures. The improved character of the article for accomplishing this purpose is clue to the provision of a superior nozzle structure to prevent the backow of the liquid chemical injected into the timbers bythe nozzle; f to the provision of a Ynozzle structure capable of being rapidly and eiectively hammered into its operative position inrelation to the timber to be impregnated with the liquid insecticide; and to the provision of an improved means for graduating the delivery of the liquid from the nozzle.y

Other objects and advantages of the invention reside in the provision of an implement whereby the timbers of a. building may be more'rapidly and eiciently impregnated with a' liquid insecticide; the provision of a device which is less tiresome for the workman to use; and the provision of a device whereby the liquid insecticide ma be used in a less wasteful manner. f

Another important object ofthe invention' is to provide an improved valve cracking means which will permit the impregnating agent to at times drool from the nozzle tip of the instrument.

' Still another object of the invention resides in providing a novel combination of nozzle, tip, hammer head, Hand adjustable valve delivery means'with a tank containing a liquid under Pressure. l l I An improved feature of thev invention resides in the combination, witha nozzle having a tapered tip' at Oneextremity and an impact receiving portion at its other extremity to drive said tip into a body to be impregnated with liquid from the nozzle; ofV a `flexible conduit connection for supplying liquid under pressure to rsaid nozzle, the iiexibility of said connection allowing the device to accommodate itself to the vibrations resulting from delivering blows against its aforesaid imp-act receiving portion.

`The invention further includes an improved means for sealing a blind bore in a Wooden or other body and then forcing an impregnating liquidinto such sealed bore.

Other objects, advantages,- and features of Ainvention will hereinafter appear.

Referringlto the drawing wherein is shown-a preferred embodiment as now. reduced to practice .and .being introduced to the trade,

Fig; 1 is a view showing the complete device in side elevation, some parts being lbroken away to show'interior construction. In said view, in dotted lines, the valve is shown in cracked or open position.

Fig. 2 is an enlarged section oi the nozzle tip occupying its operative position in relation to a piece of Wood under treatment. rIhe tip of the valvel in the latter view is shown partly in section to reveal its inner construction.

Referring in detailto `the drawing, the device comprises a gun l including a valve 2, anozzle 3 fastenedto animp-act receivingY head 4 against which blows may be struck to drive the nozzle into the wood, in combination with a tank Elfo'r delivering an agent (iY under pressure through the hose l to the wooden timber 3 for impregnation.

' Thenofzzle 3 includes" a tip 9, provided with a longitudinal restricted aperture H3, which is 'securely vfastened in the end lofthe nozzle', the tip and adjacent portion of Vthe nozzle being tapered to facilitate driving these parts into the blind hole il, the nozzle having in a spaced relation to its Vtipped end a circumferentially extending bead'iz, 'which forms with the wood afle'ak 'proof joint, even while the agent being delivered is under impregnating pressure;

Describing in furtherA detail the structures which have'beenl mentioned, the'valve '2 is rof the pointed, conicaltype and is contained within a tubular casing M having-within it la; valve charnber'l 5 furnished with'anoutlet passage l6,'slightly beveled at its inner end to form a seat for the valve 2.

i Said valve 2 is carried by an operatingstem l1 working through a stullng box i8 one end of which has a screw-threaded connection 'with the valve casing, its opposite end portion being `'externally screw threaded and having screwed on to it a cylindrical, milled nut 9, said nut not only serving to keep in placethe stuiiing-box sleeve 2 l, but also, by means of its diametrically reduced outer end portion 22, affording an adjustable stop means for the'valve operating lever 23. A coiled compression spring 24 tends to hold the valve 2 against its seat.

The valve casing I4 is carried by a combined support and tubular conduit member 25 of an L shape, the short limb 2B of the Ll connecting the body portion of said support with said Valve casing, the parts 25, 2B, and I4 being desirably made integral. The tubular member 25 extends in a parallel spaced relation to the part of the casing I4 which is furnished with the stuing box I8. Said member 25 has a laterally extending apertured lug 21 with which the valve operating arm 23 is connected by means of a pivot 28, said arm being shown provided with a bifurcated extension 29 which straddles said lug 21 and is likewise apertured to receive the pivot 28.

The extension 29 of said arm projects laterally from a head or widened end portion 3l thereof, said widened portion having through it an opened passage 32. Said passage affords a clearance around the back end portion of the valve stem II, which projects thereinto. Through the head 3| of the lever 23 and the passage 32 thereof, extends the valve operating pin 33, said pin also passing through a diametrical hole 34 provided therefor in the back end portion of said valve stem II. This hole is of a considerably greater diameter than the pin 33, thus allowing a suiicient play for the pin to avoid obstructing the operation of the arm 23 which would otherwise result on account of the arcuate movement of said pin in relation to the reciprocatory valve stem.

By preference and as shown. communication between the hose 'I and the tubular member 25 is afforded by means of a metal coupling member 35, the front end of which has a screw-threaded connection 36 with the back end of the member 25 and the opposite end of which is connected with the hose by means of a conventional connection 31.4 Said member 35 constitutes an extension of the tubular support 25 and, in conjunction with the valve lever 23, completes the handle portion of the device.

The impact receiving member 4 is connected with a tubular shank 4| which is coupled onto the valve casing I4 by means of an expanded internally threaded coupler 42. It is to be understood that the parts 42, 4I, 4 and 3 constitute continuous conduit means for conducting fluid from the interior of the valve casing to the nozzle tip 9.

Referring to certain details of construction, the

attached nozzle tip 9 is shown having a diametrically reduced shank portion 9a which is wedged in the terminal portion of the main nozzle portion 3 and provides an annular shoulder 9b against which the end of said nozzle abuts.

In the operation of the device lfor the purpose of impregnating wood with a liquid to destroy termites, a series of blind bores are rst drilled into the timbers to be treated, said holes being bored at least to a depth sufficient to admit the tip portion of the nozzle to the depth shown in Fig. 2 where the bead I2 thereof is located somewhat below the top of the bore and space is left for a liquid receiving chamber below the extremity to the nozzle after it has been driven into said bore the proper distance. Y

Then, after a small portion of the extremity of the nozzle has been inserted into the mouth portion of the bore, the impact receiving head will be struck one or more times with a hammer, thus driving the nozzle into the fully inserted position shown in Fig. 2, wherein the bead I2 will form a seal which will prevent back flow of the liquid when supplied from the reservoir under a pressure desirably between 150 and 200 pounds per square inch. The bead should be made beveled or rounded, as shown, to lessen obstruction to forcing it down to the sealing position.

The tubular coupling member 35 forms a rearward extension of the main limb of the support 25 and thus qualifies said support, in conjunction with the valve operating lever 23, to form an eilicient handle means for the device. Said lever may be readily depressed by one part; of the hand while another part of the hand abuts against the side of the part 35 opposite thereto. It is only necessary to depress the lever for a brief interval to supply from the nozzle a suilicient quantity of the liquid chemical to impregnate the wood adjacent to each bore II.

A powerful valve spring 24 is provided in order to safeguard against leakage past the valve seat of the pressure impelled liquid.

Hence, unless some provision were made to automatically maintain the valve slightly open, said powerful spring would make it tiresome for the operator to manually maintain the valve in a cracked or slightly open position for any considerable length of time, as is necessary when the device is used to drool a thin stream of the liquid over wooden surfaces, this method of treatment being sometimes desirable, and it is rendered more effective by the combination of the accurately adjustable valve controlling nut I9 with the leak preventing nozzle bead I2. But when this operation is to be performed, the operator will, while holding the valve lever 23 slightly depressed with one hand, use the other hand to adjust the nut I9 to the proper position for stopping the outward swing of lever 23 before the valve reaches its closed position. This will cause a small stream of the poisoned liquid to iiow continuously from the nozzle. 'I'he provision of the flexible hose 'I as a part of the conduit means imparts to the device the desired freeness of movement required for its operation in both the ways which have been described.

It should be understood that the present disclosure is for the purpose of illustration only and that this invention includes all modifications and equivalents which fall within the scope of the subject matter claimed.

What is claimed is:

1. In a device of the kind described, a combined support, handle means and conduit means; a tubular valve casing carried by said support, a valve in said casing, said valve having an operating stem, a lever connected with said stem to operate said valve, a spring tending to move said valve to its seat, said valve casing having a stuffing box which forms an extension thereof and is furnished with a packing through which said valve stem operates, a tubular nut screwed to said stuffing box through which the stem of said valve extends, said nut having an outer end portion abutting the head of said lever, said nut being adjustable on said stuing box to limit the movements of said lever which accompany the approach of said valve toward its closed position and thereby regulate the flow of fluid through said valve.

2. In a device of the kind described, a combined support and conduit member having a laterally directed end portion, a tubular valve casing communicating with and carried by said end portion, an end portion of said valve casing extending in a parallel spaced relation to said conduit member, such portion of said valve casing carrying a stuffing box, a valve Within said valve casing to control the flow of fluid therethrough, said valve having a stem which extends through said stuffing box and projects therefrom parallel to said conduit member, there being a diametrical hole through such projecting portion of said valve stem, a lever to operate said valve, said lever having a head through which extends a cylindrical passage that surrounds in a spaced relation the projecting end portion of said valve stem, said head carrying a pin which extends across said passage and also passes through said hole through said valve stem, said pin being of considerably less diameter than said hole, said lever having a lateral extension which is pvotally connected with the rst recited support and conduit portion, a spring tending to move said valve to Vits seat, and a tubular nut screwed to said stuffing box through Which the stem of said valve loosely extends, said nut having a reduced outer end portion abutting the head of said lever, said nut being adjustable on said stuffing box to limit the movements of said lever which accompany the approach oi said valve toward its closed position and thereby regulate the ilow of iluid through said valve.

3. In a device of the kind described, a support for a nozzle including a conduit to supply liquid to the nozzle, one section of said conduit constituting handle means for holding the nozzle, said conduit section having an ciset portion which is furnished with a valve for said conduit, Said valve having a stem in a parallel spaced relation to said conduit section, and an operating lever for said valve stem, said lever extending in an adjacent generally parallel relation to said handle to be graspable in one hand together therewith, and a turnable control means for said valve, said turnable control means comprising a tubular nut screwed to said offset portion through Which the stem of said valve loosely extends, said nut having an outer end portion abutting the head of said lever, said nut being adjustable to limit the movements of said lever which accompany the approach of said valve toward its closed position and thereby regulate the ilovv ci fluid through said valve.

4. The combination with a liquid pressure supply means and a nozzle member provided at one end with a uid delivery tip having a circumferential bead extending therearound and at its opposite end with an extension suited to receive blows from a hammer directed thereagainst ina direction to force said nozzletip and head into a Woody body adapted for impregnation by a liquid from said pressure supply means, said bead sealing against back ow the liquid ejected from said nozzle into said body; of a manually operable valve controlled fluid gun to regulate the ilow of liquid from said pressure supply means to said nozzle tip, said gun having a fluid delivery 'end in communication with and providing a support for said nozzle member, said gun further comprising a tubular valve casing communicating with said delivery end, a combined support and conduit member connected to said pressure supply means and having a laterally directed end portion connected to and communicating with said tubular valve casing; an end portion of said valve casing extending in a parallel spaced relation to said conduit member, such portion of said valve casing carrying a stufling box, a valve within said valve casing, said valve having a, stem which extends through said stuiing box and projects therefrom parallel to said conduit member, there being a diametrical hole through such projecting portion of said valve stem, a lever to operate said valve, said lever having a head through which extends a tubular passage that surrounds the projecting end portion of said valve stem in a spaced relation thereto to provide for tilting movements of said lever, said head carrying a pin Which extends across said passage and also passes through said hole through said valve stem, said pin being of considerably less diameter than said hole, said lever having a lateral extension which is pivotally connected With said conduit member, a spring tending to move said valve to its seat, and a tubular nut screwed to said stufling box through which the stem of said Valve loosely extends, said nut having a reduced outer end portion abutting the head of said lever, said nut being adjustable on said stuiling box to limit the movements of 'said lever which accompany the approach of said valve toward its closed position and thereby regulate the iloW of uid through said valve.

VICTORl S. FAAST.