US1384355A

US1384355A - Hypodermic needle

Info

Publication number: US1384355A
Application number: US352712A
Authority: US
Inventors: Arthur E Smith
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-01-20
Filing date: 1920-01-20
Publication date: 1921-07-12
Anticipated expiration: 1938-07-12

Description

A. E. SMITH.

HYPODERMIC NEEDLE.

APPLICATION FILED JAN. 20, I920.

Patented July 12, 1921.

I I I awuemtoz ARTHUR E. SMITH, OF CHICAGO, ILLINOIS.

HYPODERMIG NEEDLE.

Specification of Letters Patent.

Patented July 12, 1921.

Application filed January 20, 1920. Serial No. 352,712.

To all whom it may concern:

Be it known that I, ARTHUR E. SMITH, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and'useful Improvements in Hypodermic Needles, of which the following is a specification.

This invention relates to hypodermic needles of the character commonly employed in conjunction with hypodermlc syringes and its object is to provide a needle of the character indicated provided with a guard which will reinforce the needle and prevent breakage of the same at its juncture with the cap or hub of thesyringe, will serve as a gage to determine how far the needle may be injected into the tissue and will serve as i a means for withdrawing the needle from the tissue if the needle becomes broken off from the hub.

A further object of the invention is to provide a needle adapted for use in anesthetizing the second or superior maxillary division of the fifth nerve and it contemplates the provision of a needle s0 constructed as to cause the lateral surface of the superior maxillary bone to constitute a point of support for the needle durin its introduction to the tissue at the point w ere the fifth cranial nerve crosses the sphenomaxillary fossa or just before the nerve branch enters the posterior part of the floor of the orbit.

Since the insertion of the needle in an operation of the character indicated is in a more or less inaccessible part of the mouth, the invention further contemplates the provision of means for reinforcing and bracing the needle at the point of juncture with its nozzle or hub to thereby guard against breakage of the needle at its weakest point,

vizv at the juncture of the needle with the hub; and it also contemplates the provision of means to enable the operator to withdraw that part of the needle which is in the tissue if the needle should, in spite of the guard provided, break off at its juncture with the hub.

Further objects and advantages of the invention will be set forth in the detailed de-,

scription which now follows.

In the accompanying drawing- Figure 1 is a perspective view illustrating a part of a skull and the application of the needle;

Fig. 2 is a side elevation of the needle;

F g. 3 is an enlarged sectional view illustratlng the juncture between the needle and 1ts nozzle or hub and Fig. 4 is a detail view of a modification showing the application of the invention upon a straight hub and needle.

Like numerals designate corresponding parts throughout the several figures of the drawing.-

Referring to the drawing 5 designates a hub that is adapted to fit upon the nipple 6 of a hypodermic syringe 7 in the usual and known way, as for example, by means of a ground joint. The hub 5 is extended to form a nozzle 9, the extremity of which is curved or bent at 10 and carries a needle 11. The bend 10 is of such nature as to cause the needle 11 to he almost, but not quite, at right anglesto the body of the nozzle 9 with the result that when the nozzle is inserted in the mouth in substantial parallelism with the upper teeth, the needle 11 will lie against and be supported by the posterior lateral surface of the superior bone during the time that the needle is being inserted into the tissue to the point where the fifth cranial nerve crosses the spheno-maxillary fossa. The support thus provided for the needle, which must be of considerable length in order to reach the point where it is to be inserted, braces and supports the needle and tends to prevent breakage of the same. As a further support for the needle the extremity of the nozzle is reduced and threaded at 12 for the reception of a nut 13 that carries a spiral 14 of wire, the outer convolutions of which are reduced in diameter to cause them to tightly frictionally engage the body of'the needle and further aid in supporting the same at the weakest point, which is at the juncture of the needle with the nozzle.

The frictional engagement provided by the spiral being reduced in the manner set forth, renders it possible to withdraw the needle even though the needle becomes broken off at its point of juncture with the nozzle. This is a feature of very great importance since, with an ordinary construction it has often been found necessary to cut and mutilate the tissue in an endeavor to remove needles that have been broken off therein. An enlarged portion 15 between the hub 5 and the nozzle 9 has its 0 posite faces flattened as indicated at 16 and 17 to provide finger grasps. It will be observed that the provision of the elongated nozzle 9 renders it unnecessary to put the body of the syringe 7 in the patients mouth, but that upon the contrary it is possible for the operator to grasp the nozzle by the finger grasps 16 and 17 and to hold the needle firmly in proper osition while operating the syringe entire y outside of the mouth. The structure illustrated in Fig. 4 is substantially the same as that hereinbefore described except that the needle lies in substantial alinement with the hub and nozzle. Here the hub has been designated 5, the nozzle 9 and the needle 11*, otherwise, the structure is the same as hereinbefore set forth.

It is to be understood that the invention is not limited to the precise construction set forth but that it includes within its purview whatever changes fairly come within either the terms or the spirit of the appended claims.

Having described my invention, claim is:

1. A hypodermicneedle comprising a hub portion, a nozzle portion having its ex tremity bent to substantially a right angle, a needle carried by said extremity and a guard secured to said extremity and con-- sisting of a spiral metallic element some of the convolutions of which are restricted to frictionally engage the body of the needle.

2. A hypodermic needle comprising a what I hub portion, a nozzle portion having its extremity bent to substantially a right angle, a needle carried by said extremity and a guard comprising a spiral and a nut the extremity of the nozzle being threaded for the reception of said nut.

3. A hypodermic needle comprising a hub portion, a nozzle portion having its extremity bent to substantially a right angle, a needle carried by said extremity and a guard comprising aspiral and a nut secured to said spiral, the extremity of the nozzle being threaded for the reception of said nut and the spiral having its outermost convolutions restricted to cause it to frictionally engage the needle.

4. A device of the character described comprising a nozzle and a needle attached to said nozzle in combination with a guard attached to said nozzle, said guard comprising a metallic spiral which frictionally engages the said needle,

5. A device of comprising a nozzle and a needle attached to said nozzle in combination with a guard connected to said nozzle, said guard comprising a spiral of metal the outermost convolutions of which are restricted to cause it to frictionally engage with the body of the needle.

6. A device of the character described comprising a nozzle having a threaded extremity and a needle secured to said nozzle in combination with a nut adapted to be threaded upon the extremity of the nozzle and a coil carried by said nut which engages said needle for a portion of its length.

7. A structure as recited in claim 6 Wherein some of the coils are restricted to cause them to frictionally engage the needle.

. In testimony whereof I aflix my signature.

ARTHUR E. SMITH.

the character described