US2826196A - Injection syringe and an injection needle for use therewith - Google Patents
Injection syringe and an injection needle for use therewith Download PDFInfo
- Publication number
- US2826196A US2826196A US410409A US41040954A US2826196A US 2826196 A US2826196 A US 2826196A US 410409 A US410409 A US 410409A US 41040954 A US41040954 A US 41040954A US 2826196 A US2826196 A US 2826196A
- Authority
- US
- United States
- Prior art keywords
- injection
- syringe
- nipple
- needle
- use therewith
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
- A61M5/347—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub rotatable, e.g. bayonet or screw
Definitions
- the type of syringe and injection needle contemplated by the present invention is of the type as described in U. S. Patent application Serial No. 285,620, now Patent Number 2,699,777 issued January 18, 1955.
- an externally threaded syringe nipple has its end provided with a fitting strip which is adapted to be brought into sealing engagement with another fitting strip on a counter-nipple having internal threads, said counter nipple having a fitting strip which surrounds the entrance to the hollow needle, and at least the syringe nipple or the counter-nipple being provided with an air passage communicating with the atmosphere, one end of said air passage ending between the screw and the fitting strip of the counternipple.
- Fig. 1 is a perspective showing of the injection syringe and Fig. 2 is a longitudinal section on the line 11-11 in Fig. 1 on a larger scale.
- the nipple 1 of the injection syringe 2 which may be of a conventional construction, is provided with an axial fluid passage 3 and with an externally threaded portion 8.
- the injection needle 5 is provided with a counter nipple 6 which is internally "ice provided with a threaded portion 9 which fits on the screw-threaded portion 8 of the syringe nipple 1.
- the needle counter-nipple 6 which comprises a transverse bore 7 functioning as an air passage is-just as the syringe nipple 1so dimensioned that upon screwing the needle nipple 6 on the syringe nipple 1 the end of the latter, which end is constructed as a fitting strip, will come into sealing engagement with the internal fitting strip 10 of the needle nipple 6, which fitting strip 10 surrounds the entrance to the hollow needle 5.
- the needle nipple 6 is unscrewed from the syringe nipple 1 for the purpose of replacing the injection needle by a fresh needle the needle nipple and the syringe nipple will be axially and relatively displaced, so that at the same time the sealing engagement between the end of the syringe nipple 1 and the internal fitting strip 10 of the needle nipple 6 will be interrupted and via the air passage 7 in the needle nipple 6 air will be admitted to the axial fluid passage 3 in the syringe nipple 1.
- injection fluid which has remained behind in the injection needle 5 and which may be contaminated will be prevented from being sucked back and from contacting the syringe nipple 1 or the interior of the injection syringe when the needle nipple 6 is taken off the syringe nipple 1.
- An injection syringe in which the injection needle is detachably connected to the syringe reservoir by means of an externally threaded syringe nipple and a threaded portion of the injection needle counter-nipple, said externally threaded syringe nipple having its end provided with a fitting strip coming into sealing engagement with a fitting strip on said counter-nipple, said syringe nipple being threadably engaged with said counter-nipple, said fitting strip on said counter-nipple surrounding the entrance to the said injection needle, at least one of said nipples being provided with an air passage communicating with the atmosphere and ending in a hollow portion in said counter-nipple between a screw thread and a fitting strip.
Description
March 11, 1958 5. J. PIEKEZ' 2,826,196
INJECTION SYRINGE AND AN INJECTION NEEDLE FOR USE THEREWITH Filed Feb. 15, 1954 f IN V EN TOR. .Su'ntm 'j'ukcmnes Vek f M United States Patent INJECTION SYRINGE AND AN INJECTION NEEDLE FOR USE THEREWITH Simon Johannes Piek, s-Hertogenhosch, Netherlands, assignor to Johan Voorhorst, The Hague, Netherlands Application February 15, 1954, Serial No. 410,409 1 Claim. (Cl. 128-221) The present invention relates to an injection syringe and an injection needle for use therewith.
In the past there has been a serious problem in the use of injection syringes having a removable injection needle attached thereto, resulting from the flow of contaminated fluid back into the injection syringe because of the negative pressure created in the injection syringe upon the removal of the needle.
It is an object of the present invention to provide an injection syringe having a detachable needle whereby the positive pressure is maintained in the injection syringe which prevents the backflow of contaminated fluid into the injection syringe from the injection needle.
The type of syringe and injection needle contemplated by the present invention is of the type as described in U. S. Patent application Serial No. 285,620, now Patent Number 2,699,777 issued January 18, 1955.
In accordance with the present invention the above and other objects are accomplished by a construction whereby an externally threaded syringe nipple has its end provided with a fitting strip which is adapted to be brought into sealing engagement with another fitting strip on a counter-nipple having internal threads, said counter nipple having a fitting strip which surrounds the entrance to the hollow needle, and at least the syringe nipple or the counter-nipple being provided with an air passage communicating with the atmosphere, one end of said air passage ending between the screw and the fitting strip of the counternipple.
In illustration of the invention an embodiment of the injection syringe will be described with reference to the accompanying drawing, in which:
Fig. 1 is a perspective showing of the injection syringe and Fig. 2 is a longitudinal section on the line 11-11 in Fig. 1 on a larger scale.
According to the drawing the nipple 1 of the injection syringe 2 which may be of a conventional construction, is provided with an axial fluid passage 3 and with an externally threaded portion 8. The injection needle 5 is provided with a counter nipple 6 which is internally "ice provided with a threaded portion 9 which fits on the screw-threaded portion 8 of the syringe nipple 1.
The needle counter-nipple 6 which comprises a transverse bore 7 functioning as an air passage is-just as the syringe nipple 1so dimensioned that upon screwing the needle nipple 6 on the syringe nipple 1 the end of the latter, which end is constructed as a fitting strip, will come into sealing engagement with the internal fitting strip 10 of the needle nipple 6, which fitting strip 10 surrounds the entrance to the hollow needle 5.
If after the administration of an injection the needle nipple 6 is unscrewed from the syringe nipple 1 for the purpose of replacing the injection needle by a fresh needle the needle nipple and the syringe nipple will be axially and relatively displaced, so that at the same time the sealing engagement between the end of the syringe nipple 1 and the internal fitting strip 10 of the needle nipple 6 will be interrupted and via the air passage 7 in the needle nipple 6 air will be admitted to the axial fluid passage 3 in the syringe nipple 1. Thus injection fluid which has remained behind in the injection needle 5 and which may be contaminated will be prevented from being sucked back and from contacting the syringe nipple 1 or the interior of the injection syringe when the needle nipple 6 is taken off the syringe nipple 1.
Though a preferred embodiment of my invention has been illustrated and described herein, it is to be understood that certain changes may be made as improvement to the features herein disclosed, which do not in any way depart from the true spirit and scope of the appended claim. These may include alteration of the disposition of the air passage in the needle nipple and the like to form a slot, not shown.
I claim:
An injection syringe in which the injection needle is detachably connected to the syringe reservoir by means of an externally threaded syringe nipple and a threaded portion of the injection needle counter-nipple, said externally threaded syringe nipple having its end provided with a fitting strip coming into sealing engagement with a fitting strip on said counter-nipple, said syringe nipple being threadably engaged with said counter-nipple, said fitting strip on said counter-nipple surrounding the entrance to the said injection needle, at least one of said nipples being provided with an air passage communicating with the atmosphere and ending in a hollow portion in said counter-nipple between a screw thread and a fitting strip.
References Cited in the file of this patent UNITED STATES PATENTS 1,547,557 Brody July 28, 1925 1,596,004 De Bengoa Aug. 17, 1926 FOREIGN PATENTS 902,925 France Ian. 3, 1945
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US410409A US2826196A (en) | 1954-02-15 | 1954-02-15 | Injection syringe and an injection needle for use therewith |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US410409A US2826196A (en) | 1954-02-15 | 1954-02-15 | Injection syringe and an injection needle for use therewith |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2826196A true US2826196A (en) | 1958-03-11 |
Family
ID=23624592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US410409A Expired - Lifetime US2826196A (en) | 1954-02-15 | 1954-02-15 | Injection syringe and an injection needle for use therewith |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2826196A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3603310A (en) * | 1969-06-30 | 1971-09-07 | Parke Davis & Co | Disposable syringe |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1547557A (en) * | 1924-05-15 | 1925-07-28 | Brody William | Hypodermic needle |
| US1596004A (en) * | 1923-04-04 | 1926-08-17 | Bengoa Miguel Becerro De | Hypodermic syringe |
| FR902925A (en) * | 1943-10-12 | 1945-09-17 | Hypodermic syringe |
-
1954
- 1954-02-15 US US410409A patent/US2826196A/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1596004A (en) * | 1923-04-04 | 1926-08-17 | Bengoa Miguel Becerro De | Hypodermic syringe |
| US1547557A (en) * | 1924-05-15 | 1925-07-28 | Brody William | Hypodermic needle |
| FR902925A (en) * | 1943-10-12 | 1945-09-17 | Hypodermic syringe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3603310A (en) * | 1969-06-30 | 1971-09-07 | Parke Davis & Co | Disposable syringe |
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