US798093A - Hypodermic syringe. - Google Patents

Description

PATENTED AUG. 29, 1905.

vwemoc E. F. DEAN.

HYPODBRMIG SYRINGB.

APPLIOATIGH FILED MAY 11, 1904.

PATENTBD AUG. 291905. E. F. DEAN. HYPODERMIG SYRINGE.

APPLIOATION FILED MAY 11, 1004.

2 SHEETS-SHBET 2.

pnrrsn sfrafrns PATENT FFIQE.

HYPODERIVIIC SYFHNGE.

Specification of Letters Patent.

Patented Aug. 29, 1905.

Application fiieaMay 11, 1904.. semi No. 207,496.

T0 all whom t may concern:

Be it known that I, EDWARD F. DEAN, a citi- Zen of the United States of America, 'residing in the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Hypodermic Syringes; and I do declare the following to be a fulLclear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, refererence being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of` this specification.

My invention relates to improvements in hypodermic syringes of the class set forth in my application, Serial No. 196,620, filed March 4, 1904. f

My present invention consists of certain improvements on the construction set forth in the aforesaid application. In my improved construction the container is normally closed by a thin washer before the needle is applied. The needle is mounted in a screw-cap and has aninteriorly-pro j ecting part adapted to pierce the washer orvalve, thus opening the container to allow its contents to pass through the needle as the syringe is operated. The follower of the device is also provided with a spring whose extremities engage notches on the arms of the frame, whereby the follower may be locked in any desired position of adjustrnent. Furthermore, the front part of the container of my improved construction may consist of glass, to which is clamped a rearwardly-extending collapsible portion lined with thin metal. In the operation of the device the projection of the follower acts on the rear .collapsible portion to force the latter into the forward or glass portion of the container, whereby the liquid is ejected through the needle. The collapsible portion of the container is clamped to the glass portion, the latter having a circumferential groove in the plane of the clamp, whereby a liquid-tight joint is formed between the collapsible part and the glass part.

Having briefly outlined my improved construction, as well as the function it is intended to perform, I will proceed to describe the same in detail, reference being made to the accompanying drawings, in which is illustrated an embodiment thereof.

In the drawings, Figure 1 is an elevation of my syringe with the needle removed. Fig. 2 is an elevation of the needle. Figs. 3 and 4 are sections of the construction shown in Figs. 1 and 2. Fig. 5 is a view of the complete syringe, the container and the needleholder being shown in section and the fol-J lower moved to engagement with the collapsishowing the needle detached. Fig. 9 is a similar view showing the parts assembled. Fig. 10 shows the valve-washer, on a larger scale, previous to puncturing. Fig. 11 shows the valve-washer after it has been punctured. Fig. 12 is a view, on a larger scale, showing another form of construction, the container being shown in section. Fig. 13 is a detail View of the clamping-ring and the frame-arms mounted thereon. Fig. 14 is an exteriorly-threaded metallic sleeve mounted on the neck of the glass container. Fig. 15 is a detail view of the container.

The same reference characters indicate the same parts in all the views. l

Referring first to Figs. 1 to 11, inclusive, let A designate the body of the device considered in its entirety. A designates arms, to the forward extremities of which is attached a part A2, composed of suitable rigid material. Inserted in the part A2 is a collapsible bulb B, which extends rearwardly beyond the part A2, while its forward extremity is connected with the container part A2 by means of a screw B, whose head clamps the forward extremity of the bulb against the forward extremity of the rigid part A2. A nipple B2 is screwed upon the forwardly-protruding extremity of the screw B. This screw is hollow and its opening registers with an orifice B3, formed in the nipple. Between this orifice and the forward extremity of the screw is placed a small flat valve C, which is normally closed IOO to prevent the escape of the contents of the container. The needle D is made fast in the holder D', having an interiorly-threaded part D2. The rear extremity of the needle protrudes into' the part D2 and is slightly elon-- to iit the arms A of thev frame, whereby the plate is free to slide easily on the frame-arms. This plate F is provided with a forwardly-extending projectionF2, adapted to engage the collapsible portion of the bulb and expel the contents of the container as the follower is l, moved to the position shown in Fig. 6. Upon the follower-plate F is mounted a spring G, whose extremities G engage notches A3, formed in the arms A as the follower is moved forwardly. This spring is connected with the follower-plate by a screw GZ, whereby the follower may be released to permit the return movement by turning the spring-catch to disengage the notches of the arms A. Thecatch may be turned to the position shown by dotted lines in Fig. 7 or to any other intermediate position, so that the extremities G of the spring will not catch upon the notches A3.

In the form of construction shown in Figs. 12 to 14, inclusive, H is a glass container, approximately hemispherical, having a neck- H, upon which is cemented an exteriorly-threaded sleeve H2. To this sleeve is screwed a nipple H3, which projects slightly beyond the neck H and the sleeve H2 and is provided with an orifice large enough to receive the rear extremity of the needle. This orifice is nor-Y mally closed by the valve-washer C until the needle is applied, as shown in Fig'. 12, when the washer is punctured to allow the liquid I to escape as the follower is actuated. The

rear extremity of the containerH is provided with a circumferential groove H4, to which is clamped the collapsible rearwardly-extending l patl, having a lining J of very thin metal,

the circumferential flange H7, formed on the nipple H3, and a corresponding flange D4, formed on the needle-holder, is located apacking-washer H5, while a similar washer H6 is placed between the container H and the iiangeA I-I7 of the nipple.

These features all unite to forrn a perfect fit and make a liquid -tight joint.

Previous to using the syringe the container (whether of the form shown in Figs. 1, 3, 45, and 6 or in Fig. 12) is first filled with the serum to be used and the nipple B screwed to position, with the valve-washer C in place. Then as soon as itis desired toy use the device the needle is applied to the nipple, and as it is screwed thereon the rear extremity D3 punctures the valve-washer to permit the escape of the serum. The part C', punched out of the opening, is not cut from the washer, but clings thereto on one side, since the rear extremity of the needle is shaped to effect this result. Then as the follower is forced forwardly the serum is driven out of the container through the needle in a manner well understood. v ,l The valve-washer C is preferably composed of thin non-corrodible metal.

i Having thus described my invention, what I claim ishaving a rearwardly-extending collapsible portion which the projection engages `as the.

follower is actuated, and a spring-catch mounted on the follower and whose extremities are adapted to engage they notches of the frame-4 arms for the purpose set forth. .y

3. In a hypodermic syringe, the combination of a container provided with a nipple, a

needle adapted to be connected with the nipple and having an inwardly-projecting part, and a valve-Washer normally closing ,the escape-opening of the container and consisting of thin material adapted to be punctured by the inwardly-protruding extremity of the nee"-y dle as the latter is connected with the nipple.l

4. A hypodermic syringe provided with a collapsible portion lined with thin non-corrodible metal.

IOO

TIO

5. A hypodermic syringe provided with a l container having' a valve normally closing its exit extremity, a nozzle adapted to be con-,

nected with the container and provided with an inwardly-projecting part adapted to puncn ture the valve when the nozzle is applied.

6. A hypodermic syringe comprising a conbetween the frame and follower, substantial] y IO tainer, a collapsible portion extending rearas described. wardly from the glasscontainer when the bulb In testimony whereof I alx my signature in is distelnded, and1 a, folllOovlver nounted in suit presence of two witnesses. 5 able re ation wit the u b an container an adapted to act on the collapsible bulb as the EDWARD F DEAN' follower is actuated, a frame connected with Witnesses: the container upon which the Jfollower is slid- DENA NELSON, ably mounted, and an interlocking connection A. J. OBRIEN.

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