US426017A - Hypodermic syringe - Google Patents

Description

Modem W. W. HITOHOOOK.

HYPODERMIG SYRINGE.

No. 426,017. Patented Apr. 22, 1890.

7726 &

UNiTn e STATES PATENT @FFICE.

\VILLIAM \V. HITCHCOCK, OF LOS ANGELES, CALIFORNIA.

HYPODERMIC SYRINGE.

SPECIFICATION forming part of Letters Patent No. 426,017, dated April 22, 1890. Application filed December 12I 1889. Serial No, 333,501. (Model) T0 aZZ whom it may concern:

Be it known that 1, WILLIAM W. HITCH- COCK, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Improvement in Hypodermic Syringes, of which the following is a specification.

The object of my invention is to produce a cheaper, more compact, and more conveniently operated hypodermic syringe than has heretofore been known, securing, also, superior cleanliness and greater precision of operation. This I accomplish by means of the device described herein, and illustrated in the accompanying drawings, in which- Figure 1 is a top View of my improved syringe. Fig. 2 is a side view of the same. Fig. 3 shows the several parts detached from each other. Fig. a is a longitudinal vertical midsection. Fig. 5 is a midsection showing the needle incased within the neck and bulb for convenience in packing, the whole being shown in a pocket-case.

It is common to operate ordinary syringes by means of india-rubber bulbs; but such bulbs have never-been applied to hypodermic syringes, for the reason that the bulb does not furnish sufficient purchase for the proper manipulation of such syringe. My invention avoids this difficulty, and the convenient rubber bulb is thereby made applicable to this class of syringes.

The perforated neck A, upon which the elastic rubber bulb B is bound by means of adjustable retaining-band O, is provided with handles D, extending along the outside of the bulb. These handles are preferably laterally arranged and united at their rear ends to form a loop at the rear of the bulb, as shown in the drawings, thus making a more complete handle. The neck A extends forward and backward from its junction with the handles, and is laterally flattened and widened at its rear end to form a horizontally-wedgeshaped insertion E, projecting into the bulb, the outer edges of the wedge projecting beyond the body of the neck to form retaining-lugs a a, to hold the bulb on the neck A. The forward extension of the neck A terminates in the nipple F, upon which the socket of the de tachable needle G is fitted in the ordinary manner.

The neck of the rubber bulb B is provided at its end with two notches c e, to fit upon the handles D, so as to give more lap between the band C and the end of such neck when the band is in place, thereby (and without making the neck A too long) avoiding the possi bility of leakage.

The syringe is provided with a projecting lug arranged on the upper outer side of the syringe. This lug may be formed, as shown in the drawings, of the perforated lugs Z) I), attached to and projecting upward from the outside of the retaining-band. Tension-screw 0 passes through a plain perforation in one of the lugs, and screws into a screw-threaded perforation in the other lug, thus drawing the lugs together to decrease the size of the band, thus clamping the neck of the bulb firmly upon the perforated neck A.

The purpose of this projection is to give purchase for the thumb of the operator.

The operation is as follows: The bulb is compressed between the thumb and finger to expel the air, and is then filled with the liquid to be injected. The needle being properly adj nsted, the syringe is held with the needle pointing upward, while the operator compresses the bulb until the needle is filled to the point, thus expelling all the air. The operator holds the syringe with the forefinger beneath the bulb and in contact with one of the handles D, the ball of the thumb presses the top of the bulb, and the end of the thumb rests against the rear of the projection formed by the lugs b I), and the second finger is in contact with the other handle. The position of the fingers may be altered; but it will be found that the side handles D D and the top projection b I? give the operator perfect control of the syringe. The horizontal wedgeshaped joint of the insertion end of the neck enables the operator to compress the bulb until all the fluid is expelled. The several parts are easily taken apart and cleaned. The syringe can ordinarily be easily cleaned by washing, as is common with bulb syringes, some antiseptic solution being used, if desired. The perfect freedom from valves renders this syringe perfectly antiseptic with 01'- dinary care. The longitudinal perforation or duct d through the neck A is of sufficient diameter to receive the needle, so that when the instrument is not in use the detachable needle G may be reversed and incased within the neck and bulb, thus securing superior compactness and preserving the needle from injury. The syringe when thus put together may be placed in the case H and conveniently carried in the vest-pocket. The looped handle shown prevents accidental longitudinal compression of the bulb, which otherwise might occur when the parts of the syringe are adjusted as shown in Fig. 5, and which compression might cause the needle to punc- 'ture the bulb;

It is obvious various means may be employed to secure the bulb to the neck-for example, a wire might be bent around the neck of the bulb and the ends twisted together to form a projection equivalent to the projection formed by lugs b b. I do not wish to limit my claim to the band shown.

Now, havingdescribed my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a hypodermic syringe, the combination of an elastic bulb, a perforated neck provided with a handle extending along the outside of the bulb, and means for securing the bulb to the neck.

2. In a hypodermic syringe, the combination of an elastic bulb,a perforated neck provided with laterally-arranged handles ext-ending along the outside of the bulb and united at the rear thereof, and means for securing the bulb to the neck.

3. A hypodermic syringe comprising the combination of an elastic bulb, a perforated neck provided with laterally-arranged handles extending along the outside of the bulb, means for securing the bulb to the neck, and a projecting lug arranged on the upperouter side of the syringe.

4. In a hypodermic syringe, the combination of an elastic bulb, aperforated neck provided with the laterally widened wedgeshaped insertion and with a handle extending along the outside of the bulb, the retainingband provided with the perforated lugs, and the tension-screw.

. WILLIAM W. HIlOI-ICOCK, WVitnesses:

JAMES R. TOWNSEND,

M. O. GALER.

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