US1308919A - Pressure-syringe and subcutaneous needle - Google Patents

Description

J. A. E. SELLAR. PRESSURE SYRINGE AND SUSCUTANEOUS NEEDLE.

APPLICATION HLED IULY 23. I918.

Patented July 8, 1919 THE coLuuMa PLANOUHAPH c0, WASHINGTON, D. c.

UNITED STATES PATENT OFFICE.

JOHN A. E. SELLAR, OF EVERETT, MASSACHUSETTS, ASSIGNOR TO THE RANDALL- FAICHNEY COMPANY, INC., A CORPORATION OF MASSACHUSETTS.

PRES'SURE-SYRINGE AND SUIBCUTANEOUS NEEDLE.

Application filed July 23, 1918.

To all whom it may concern:

Be it known that 1, JOHN A. E. SELLAR, a citizen of the United States, residing at Everett, in the county of Middlesex and State of Mlassachusetts, have invented new and useful improvements in Pressure Syringes and Subcutaneous Needles, Case 15,) of which the following is a specification.

This invention relates to a pressure syringe and subcutaneous needle.

The object of the invention is to provide a pressure syringe and subcutaneous needle combined and comprising a serum or fluid container which will not leak, which will be absolutely sealed and which can be rendered sterile and free from contamination, but which will be readily adaptable for use by the application of direct pressure upon the piston of the syringe without any danger or possibility of the fingers or of any extraneous or contaminating material coming in contact with the sealing medium or the contents of the container.

The object of the invention is further to provide a device of the character set forth which is entirely free from any possibility of corrosion or climatic or chemical changes.

The invention consists in the combination and arrangement of parts set forth in the following specification and particularly pointed out in the claims thereof.

The figure of the drawings is a sectional elevation of my improved syringe and needle.

In the drawing, 6 is the barrel of the syringe, preferably formed of glass and provided with a piston 7 and piston rod 8. The barrel 6 terminates at one end thereof in a neck 9, referably of less diameter than that of the lEarrel 6 and having at its outer end an annular flange 10. Said neck 9 is provided with a passage 11 which preferalbly tapers toward the outer end of said neck 9.

A sto per 13 fits the passage 11 and is forced t ereinto by a slight pressure. Said stopper is referably formed of cork or other material of impervious structure, but it may be made of glass or any other suitable material, and should be treated with a lubricating compound such as paraflin, glycerin or apy other lubricant capable of being steriliz A subcutaneous needle 14 is provided with Specification of Letters Patent.

Patented July 8, 1919.

Serial No. 246,369.

a passage 15 extending longitudinally therethrough. Said needle 14 extends art way through a duct 16 provided in a hu 17 and extending longitudinally of said hub.

The hub 17 is provided with annular flanges 18, 19 and 20 and is also provided with a lateral passage 21 which extends into the duct 16 adjacent to the flange 20. Said hub 17 is further provided with an extension 22 which extends beyond the lateral passage 21 and is preferably cylindrical in cross section and taper from the cylindrical portion 22 into the flange 20. The extension 22 is of less diameter than the smallest diameter of the tapered passage 11, so that it may be pushed into said passage and eject the stopper 13 from the passage 11 into the barrel 6. A flexible tubular member 23 connects the hub 17 to the neck 9.

111 the operation of the device the barrel (3 is filled with serum or other fluid and sealed in the passage 11 of the neck 9 by the stopper 13. The hub 17 with the needle 14- attached thereto is inserted in one end of the flexible member The flexible memher is then ushed onto the neck 9 over the flange 10. he parts being thus assembled the stopper 13 is ejected from the passage 11 of the neck 9 into the barrel 6 by pushing the extension 22 into the passage 11 and thus ejecting said stopper. After the stopper has been ejected, the extension 22 is withdrawn from the passage 11 of the neck 9 and the parts assume the relative positions illustrated in the drawing. The device is now ready to be used and by a slight pressure on the piston 7, while holding the syringe in an upright position, the fluid in the barrel (3 passes out of the passage 11 of the neck 9 into the tubular member 23 and through the lateral passage 21 into the 1011- gitudinal duct 16 and from thence flows through the passage 15 in the subcutaneous needle 14. The physician having by this means expelled any air that may have been under suspension in the fluid or in the syringe inserts the needle 14 under the cuticle of the patient and by pressure of the piston causes the fluid to flow freely from the needle.

The end of the hub 17 which is inclosed within the flexible member 23 being tapered and preferably tapered on a concave curve renders it easy to insert the hub in the tubular member and also assists in the free flow of the liquid from the tubular member into the lateral :passagevizl and longitudinal duct 16.

Having thus described in i invention, what I claim and desire by Letters Patent to secure is:

l. A hypodermic syringe comprising a barrel, a neck at one end of said barrel having a passage extending therethroug'h, a stopper heldiin said passage by frictional contact With -said neck and a piston fitting into said barrel, in combination with a hy'po dermic needle a hub for said hypodermic needle having a duet extending longitudinally thereof and a passage extending laterally of said hub into said longitudinal duct, an extension on said hub projecting longitudinally thereof beyond said lateral passage and toward said n'eek, the diameter of said projection being smaller than the smallest diameter of the passage in said neck, whereby said stopper may be ejected from said neck into said barrel, and a flexible tubular member connecting said neck and said hub.

2. A hypodermic syringe comprising a barrel, a neck at one end of said barrel having a passage extending therethrough and tapering toward the outer end of said neck, a stopper held in said passage by frictional contact withsaid neck and "a piston fitting into said barrel, in combination With a hypodermic needle a hub for said hypodermic needlediaving a duct extending lonitudinally thereof and a passage extending ateirally of said hub into said longitudinal duct, an extension on said hub pro ecting longitudinally: thereof beyond said lateral passage and toward said neck, the diameter oi: said prmjection being smaller thanthe smallest diameter of the passage in said neck, whereby said stopper may be ejected from said neck into said iiarrel, and a flexible tubular member connecting said neck and said hub.

3. A hypodermic needle having a passage extending longitudinally therethrough, a hub having a duct extending longitudinally thereof, into which duct the butt end of said hypodermic needle projects and fits, said hub having a lateral passage extending into said longitudinal passage and anexten'sion on said hub projecting longitndin'all T thereof to a substantial extent beyond sai lateral passage.

4. A hypodermic needle having a passage extending longitudinally theretlirough, "a hub having a duct extending longitudinally thereof, into which duct the butt end of said hypodermic needle projects and fits, said hub being provided With a lateral passage extending into said longitudinal duct, an annular flange on said hub, and an extension on said hub extending from said flange to a substantial extent beyond said lateral passage, said extension being cylindrical throughout the greater portion of its len th and tapering froin said flangeto said cyliin drical portion.

In testimony whereof I have hereunto set my hand in presence of two subscribing \Vllnesses.

' JOHN A. E. SELLAIL Witnesses:

M. C. DURHAM, M. H. F onREsT.

Copies of this patent may be obtained for jive cents each, b addressing the Commissioner of reams. Washington, 1). 0.

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