US1712084A - Hypodermic syringe - Google Patents

Description

May 7,1929. l. KULIK 1,712,08

HYPODERMIC SYRINGE File'd NOV. 4, 1922 Patented May 7, 1929.

UNITED "STATES PATENT OFFICE.

IRVING KULIK, OF BROOKLYN, NEW YORK, ASSIGNOR T COOK LABORATORIES, INO., OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

HYPODERMIC SYRINGE.

Application filed November 4, 1922. Serial No. 598,982.

This invention is a hypodermic syringe for use by the medical profession. I

Hypodermic syringes generally embody a barrel or cylinder provided at one end with a threaded shank on which the hub of a needle is adapted to be screwed and in which cylinder the piston is positioned for reciprocation. The stem of the piston extends beyond one end of the barrel through a stuffing box and is provided cxteriorly thereof with a handle. The barrel is also provided with a handle which forms a permanent part thereof and these handles are so proportioned that when the handle of the piston stem rests in the palm of the hand, two fingers may be hooked over the handle of" the cylinder to the end that contraction or closing of the hand will cause the piston to be advanced for the purpose of forcing liquid contained in the barrel through the hypodermic needle associated with the opposite end thereof. Every hypodermic syringe as .purchased on the market is sold with one or I more wrenches. These wrenches are usually stamped up from relatively heavy sheet metal, one wrench being of the size to fit the hub of the needle and operable to attach or remove such hub from the cylinder and the other wrench being of a size to fit the cap of the stufiing box, so that said stuffing box may be adjusted to preclude leakage around the piston stem without having the adjustment so tight as to preclude the easy operation of such stem. In some instances, as the two wrenches referred to are replaced by a single double ended wrench, one end being of a size to fit the needle and the other end formed to fit the stufiing box. As these wrenches are small, they soon become lost and in any event, it is true in practice that they seldom can be found when wanted and accordingly dentists and the medical profession generally are in the habit of using forceps, pliers or other expedients to make the necessary adjustments or to change one needle for another.

The object of the present invention is to so construct the syringe that it will, of itself, embody means for making the necessary adjustments'and changing needles so that these operations can be carried on without the employment of any extraneous means and through the utilization of a component part of the syringe. Said part hitherto served as a permanent part of the syringe, either as a handle to hold the barrel-or cylinder or as a handle to propel the piston. \Yit'h this invention an additional function is given to these handles. There is obtained by this invention a hitherto lacking feature of a hypodermic syringe possessing in one of its integral parts appropriate means to adapt adjustable parts. This additional and Very useful feature is attained through novel construction of the handle parts of the syringe and entails neither additional materiol nor appliances.

In carrying out the invention in practice, the syringe is constructed with the usual cylinder, piston, piston stem and stuiiing box,

the threz'idcd shank for the needle, hub and handles are provided on both the piston stem and cylinder. However, these handles are so constructed that either one or both of them constitute a wrench and the wrench handle is detachably associated with the syringe so that when it is desired to adjust the stuffing box or to remove or replace the needle, the wrencl1like handle may be demounted and employed to facilitate these operations. The 'advantage of this construction is that in order to operate the syringe both handles must be associated therewith and accordingly a doctor after removing the handle and making the necessary adjustments must necessarily replace the handle before he can operate the syringe and because of this fact the parts must at all times, except during adjustment, be associated with one another and are not therefore apt to become lost.

Furthermore the employment of a part of the syringe as a wrench obviates the necessity of the employment of extraneous means for making the adjustments desired and not'only OlJX'ltltGS the tendency to loss but alsominimizes the manufacturing cost.

Features of the invention, other than those specified, will be apparent from the hereinat'ter detailed description and claims, when read in conjunction with the accompanying drawings.

The accompanying drawings illustrate one practical embodiment of the invention, but the construction therein shown, is to be understood as illustrative, only, and not as defining the limits of the invention.

l ig'ure 1 illustrates a hypodermic syringe embodying the present invention in side eleshown in central section.

Figure 2 shows the central section of one of the handles removed.

Figure 3 shows a central section of the other handle removed.

Figure 4 illustrates the manner in which the handle illustrated in Figure 3 may be removed with the piston and without detaching the handle from the piston.

Figure 5isa plan view of a handle associated with the piston; and,

Figure 6 is a plan View of a handle associated with the cylinder.

Referring to the drawings, 1 is a barrel or cylinder of the syringe, the same being provided at one end with a threaded shank 2 adapted to receive the hub of a hypodermic needle. The barrel is' hollow as usual and the piston operates therein. The piston may be of a relatively large size with a stem of reduced cross section, or as shown in Figure 1, the piston and stem may l e made in one piece and of constant diameter in the form of a circular rod 4. A stufiing box is associated with the piston stem and this stuiiing box embodies an adjusting cap 5 which threads into the upper end of the cylinder 1 in the usual manner.

The syringe parts described are well known and form, in themselves, no part of the present invention, but are simply referredto in order that the relationship between these parts and the present invention ma be clearly understood.

ssociated with the barrel 1 is a handle 6, while mounted on the free end of the piston stem 4 is a handle 7. Inthe illustrative showing of the drawings, both of these handles are detachably mounted on the respective parts of the syringe with which they cooperate. Thus thebarrel or cylinder 1 is provided at its upper end with a fixed collar or enlargement'8 and immediately below this collar, the barrel is of slightly larger diameter than for the remainder of its length and is threaded as shown at 9. On this threaded portion is adapted to be screwed the handle 6, said handle .being passed over the needle end of the barrel and screwed tightly against the collar 8. The

extending radially therefromand each of these arms is in accordance with-one form of the present invention cut out as shown at 10 and 11 to constitute a wrench. I, In practice, the needle hub as well as the stuffing box cap are providmd with hex-1 agonal portions and the art 10 is shaped to fit the hexagonal cap of t e stuffing box while the cut out llis shaped to fit the hexagonal hub of the needle. When it is desired to adjust the stufiing box or remove the needle, the handle 6 may be readily unscrewed from the part 9 and withdrawn into the position shown in Figure 2 wherein it is free or demounted from the syringe and either end of such handle may be employed as a wrench to make the necessary adjustments. After these adjustments have been made, the handle 6 is replaced and partakes of the full line position of Figure 1. It thus appears that the handle not only performs its usual' functions, but has the further function of providing means to effect the necessary ad-' Figure 5, this wrench being then provided with cut outs l0 and 11 similar to the cut outs 10 and 11 of the wrench 6. The handle 7 may in the. form of the invention shown in the drawings where the piston 4 is made in the form of a straight rod, be made integral with the rod so that in employing the handle as a wrench, the rod and handle may be withdrawn from the barrel 1. However, and if preferred, the upper end of the stem 4 may be reduced and threaded as shown at 12 and the wrench 7 may be provided with a tapped hole adapted to receive the threaded part 12. With this construction, the handle 7 may be screwed free from the piston or its stem when it is desired to use the handle as a wrench. When so detached it will appear as shown in Figure 3.

It will appear from the foregoing detailed description of the invention that the same is simple and highly efficient, is economical to manufacture and I have found the construction in practice highly efiicient as a time saver in the making of adjustments, where the wrenches usually emplo ed for this pose could not' be found. 1? as stated,fleither one or both handles may be constructed with one or more wrench openings or cutouts and while I have shown. .115

both handlesias'of wrench form in the drawuram aware t at,

ings, I do not sorestrict the invention which is to be understood as 'broadl novel as is commensurate with the appen ed claims.

Having thus fully described the invention, what I claim a'snew and; desire to secure by Letters Patent 7 1 1. A hypodermic syringe embodying a re onto movable .needlecarriying hub 'screwe the syringe body, said the, discharge end 0 jhub being exteriorly polygonal, and said syringe embodying a" removable syringe plunger having a wrench socket engageable with said hub, by which to screw or unscrew the hub from the syringe body. p

-2. A hypodermic syringe comprising, in

handle of elongated revrrsoly curved SOC- tion mounted on said stoni, one 0nd of said handle being rocossvd to form a wronch 10 adapted to engage said hub.

In testimony whereof I have signed the foregoing specification.

IRVING KULIK.

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