US3118726A - Termite poison applicator - Google Patents

Description

1964 R. E. IMUS ETAL TERMITE POISON APPLICATOR Filed May 11. 1961 A 0 55/27 E /Mus 5 5257? 5 C24 vase INVENTORS Afro/aways United States Patent 3,118,726 TERNHTE POISON APFLICATOR Rohert E. Imus, 839 Woodland Drive, Sierra Madre, Cairn, and Everett E. Crauder, 314 Linwood Ave, Monrovia, Calif.

Filed May 11, 1961, Ser. No. 109,377 4 Claims. (Cl. 21-73) This invention relates to termite poison applicator, and included in the objects of this invention are:

First, to provide a termite poison applicator wherein a cartridge containing a sealed charge of poison is inserted in a hole previously drilled in a body of wood, then the cartridge shell is extracted, leaving the charge intact and sealed in the hole.

Second, to provide a termite poison applicator which is particularly adapted for placing poison in powder form in a previously drilled hole, but may be utilized to place a liquid or semiliquid charge of poison therein; this being made possible by a novel seal spacer member carried in the cartridge which prevents axial compaction of a powdered poison, or compression of a liquid or semiliquid poison.

Third, to provide a termite poison applicator which invclves a novel tool element for effecting transfer of the poison from the cartridge shell and extraction of the cartridge shell.

With the above and other objects in view, as may appear hereinafter, reference is directed to the accompanying drawings in which:

FIGURE 1 is a top or end view of the termite poison applicator shown in position for insertion of the poison cartridge into a previously prepared hole;

FIGURE 2 is a side view thereof;

FIGURE 3 is a fragmentary, side view thereof, showing the applicator after the contents of the cartridge have been placed in the poison-receiving bore;

FIGURE 4 is an enlarged, fragmentary view showing in section a wooden member which has been bored to receive the poison, and showing the applicator as it appears during the process of extracting the cartridge shell and depositing the poison;

FIGURE 5 is a further enlarged, longitudinal, sectional view of the cartridge as it appears before use;

FIGURE 6 is an exploded view of the plug members and spacer member which fit within the cartridge shell;

FIGURE 7 is a still further, enlarged, transverse, sectional view taken through 7-7 of FIGURE 5;

FIGURE 8 is an enlarged, fragmentary view showing the outer portion of a wooden member is which the poison has been placed and sealed.

The termite poison applicator includes a cartridge structure and an extractor structure.

The cartridge structure includes a cartridge shell 1 formed of thin wall tubing of uniform diameter except for an extractor-receiving neck portion 2 near one end. Fitted within the cartridge shell 1, adjacent the neck portion 2, is an outer, radially expandable, sealing plug 3, which may be formed of a closed pore, cellular plastic material. The opposite or distall end of the cartridge shell 1 is also provided with an inner sealing plug 4, which is preferably tapered so as to be wedged into the cartridge shell 1.

Interposed between the plugs 3 and 4 is a spacer 5 in the form of a thin strip of metal or plastic, which has been folded to form a V in cross section, as shown in FIGURE 7. The outer end of the spacer strip 5 is cemented or soldered to a small disk which forms a head 6 abutting the outer sealing plug 3.

The confronting faces of the head 6 and outer sealing plug 3 are preferably cemented together. The space between the sealing plugs 3 and 4 and surrounding the 3,118,725 Patented Jan. 21, 1964 "ice spacer 5 is filled within a poison charge 7, which may be in granular or powdered form, or may actually be in liquid or semiliquid form.

The sealing plugs 3 and 4 normally, adequately seal the ends of the cartridge shell 1 to prevent escape of the poison charge 7. However, the plugs may be recessed from the ends of the cartridge shell 1 and a sealing material 8 applied over the outer ends of the plugs 3 and 4.

The extractor structure comprises a V-shaped frame 9 formed of a strip of spring material having arms 10 and 11, which are curved in cross section for stiffness and are joined together by a semicircular spring portion 12. The extremity of the arm 19 is curved to form an open loop 13 bifurcated at its extremity to form extractor fingers 14 which fit into the neck portion 2 of the cartridge shell 1.

A guide hole 15 is formed in the arm 10 in alignment with the slot which separates the extractor fingers 14. A plunger 16 in the form of a wire dimensioned to pass through the neck portion 2 of the cartridge shell 1 is slidable in the guide hole 15. The plunger 16 also extends through the arm 11 adjacent its extremity and terminates in a coiled end 17, which permits limited pivotal movement of the plunger 16 with respect to the arm 11.

Operation of the termite poison applicator is as follows:

The wooden structure which is to be protected against termites or which has been found to be infested with termites, is prepared by drilling at strategic locations a number of holes. For example, these holes may be made by a /4 drill and are of a depth of at least equal to the length of the cartridge.

A cartridge shell 1 is then inserted between the extractor fingers 14 and is held therein by inserting the plunger 16 until the plunger is in engagement with the sealing plug 3. The cartridge shell 1 is then inserted into the previously prepared bore until limited by engagement of the extractor fingers 14 with the outer end of the member in which the bore is formed. The arms 16 and 11 of the V-frame 9 are then brought together while the plunger 16 is held against the outer sealing plug 3.

This has the effect of discharging the contents of the cartridge shell 1 into the bore; or, stated otherwise, holding the contents of the cartridge shell 1 in the bore while the cartridge shell is extracted therefrom. When the cartridge shell 1 has been removed from the sealing plug 3, it expands and seals against the walls of the bore, as indicated in FIGURE 8.

It is preferred that the poison charge 7 be in a mobile condition so that it spreads freely into contact with the walls of the bore. This is made possible by the use of the spacer 5 which prevents compaction of the poison charge 7, if it be in granular or powdered form, or prevents exertion of pressure, which might force it past the sealing plugs 3 and 4, if it be in liquid or semiliquid form.

If desired, principally for purposes of appearance, the outer end of the bore in which the poison has been deposited may be closed with a sealing compound 18.

While a particular embodiment of this invention has been shown and described, it is not intended to limit the same to the exact details of the construction set forth, and it embraces such changes, modifications, and equivalents of the parts and their formation and arrangement as come within the purview of the appended claims.

What is claimed is:

1. A termite poison applicator adapted for insertion in a previously prepared bore, said applicator comprising:

a. a tubular cartridge shell dimensioned to fit freely in said bore;

b. sealing plugs at the inner and outer ends of said shell with respect to said bore;

c. a poison charge Within said shell between said plugs; d. and spacer means also extending between said plugs to transmit a force from said outer plug to said inner plug thereby to prevent compaction of said poison charge, whereby said plugs, poison charge, and spacer 163215 are retainable as a unit in said bore, on extraction of said shell therefrom; e. said outer plug being expansible to engage the Walls of said bore on extraction of said shell. 2. A termite poison applicator adapted for insertion in previously prepared bore, said applicator comprising:

a. a tubular shell dimensioned for free insertion in said bore and extraction therefrom;

b. inner and outer sealing plugs for said shell;

0. a rigid spacer disposed between said plugs;

d. a mobile poison charge also disposed between said plugs;

e. said outer plug being exposed for engagement to retain said plugs, spacer, and poison charge in said bore on extraction of said shell therefrom;

said outer plug also being radially expansible for sealing engagement with the Walls of said bore on extraction of said shell.

3. A termite poison applicator adapted for insertion in previously prepared bore, said applicator comprising:

a. a tubular shell for insertion into said here and ex traction therefrom, said shell having a neck portion adjacent its outer end for extraction of said shell, said neck portionforming an internal constriction;

b. an outer plug disposed adjacent said constriction;

c. an inner plug adjacent the inner end of said shell;

d. a rigid spacer disposed between said plugs;

e. a mobile poison charge also disposed between said plugs;

f. sealants covering the exposed sides of said plugs to seal said poison charge in said shell;

g. said outer plug being exposed for engagement to retain said plugs, spacer, and poison charge in said bore on extraction of said shell therefrom;

It. said outer plug also being radially expansible for sealing engagement'with the Walls of said bore on extraction of said shell.

. A termite poison applicator, comprising:

a tubular cartridge shell including an extraction means at one end; inner and outer sealing plugs for said shell;

a rigid spacer disposed between said plugs;

and a mobile poison charge also disposed between said plugs;

e. said tubular cartridge shell and its contents adapted to be introduced into a Wooden member to be treated;

said outer plug being exposed for engagement to re tain said plugs, spacer, and poison charge in said wooden member on extraction of said shell therefrom;

g. said outer plug also being radially expansible for sealing engagement With said Wooden member on extraction of said shell.

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Referen'ees tilted in the tile of this patent UNITED STATES PATENTS OTHER REFERENCES Bennett: U. of Calif., Ag. Ex. Stat, Circ. 321, March 35 193i, pp. 19, 12, 8 and 9. (Copy in 47-575.)

Claims (1)

1. A TERMITE POSION APPLICATOR ADAPTED FOR INSERTION IN A PREVIOUSLY PREPARED BORE, SAID APPLICATOR COMPRISING: A. A TUBULAR CARTRIDGE SHELL DIMENSIONED TO FIT FREELY IN SAID BORE; B. SEALING PLUGS AT THE INNER AND OUTER ENDS OF SAID SHELL WITH RESPECT TO SAID BORE; C. A POISON CHARGE WITHIN SAID SHELL BETWEEN SAID PLUGS; D. AND SPACER MEANS ALSO EXTENDING BETWEEN SAID PLUGS TO TRANSMIT A FORCE FROM SAID OUTER PLUG TO SAID INNER PLUG THEREBY TO PREVENT COMPACTION OF SAID POISON CHARGE, WHEREBY SAID PLUGS, POISON CHARGE, AND SPACER MEANS ARE RETAINABLE AS A UNIT IN SAID BORE, ON EXTRACTION OF SAID SHELL THEREFROM; E. SAID OUTER PLUG BEING EXPANSIBLE TO ENGAGE THE WALLS OF SAID BORE ON EXTRACTION OF SAID SHELL.

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