US2711733A - Hypodermic needle - Google Patents

Hypodermic needle Download PDF

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Publication number
US2711733A
US2711733A US241261A US24126151A US2711733A US 2711733 A US2711733 A US 2711733A US 241261 A US241261 A US 241261A US 24126151 A US24126151 A US 24126151A US 2711733 A US2711733 A US 2711733A
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Prior art keywords
needle
point
arcuate
end wall
beveled
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Expired - Lifetime
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US241261A
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Jr George W Jacoby
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Individual
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/3286Needle tip design, e.g. for improved penetration

Definitions

  • a rrp/Mens This invention relates to a hypodermic needle or cannula having a cutting point of a particular configurap tion which facilitates the insertion of the needle into human flesh with a minimum of damage to the tissue and pain to the patient.
  • the most important object of this invention is to provide a spade-like point on the tip of the hypodermic needle which has a knife-like cutting edge extending along the sides of the needle point and around the end of the point.
  • Another object of this invention is to provide a hypodermic needle which is ground on the outer surface of the needle point for obtaining a thin cross section and a sharper and more durable cutting edge at the end and sides of the point.
  • a further object of this invention is to provide a hypodermic needle having the rear portion of the needle opening dulled to prevent the cutting of a plug of tissue during insertion of the needle into flesh.
  • a still further object of this invention is to provide an improved hypodermic needle having a spade-like cutting edge which will pierce the skin and form an opening therein, for entry of the needle, which is clean-cut, thereby reducing the pain and the amount of damage to the tissue to a minimum.
  • Fig. l is a plan view of the needle
  • Fig. 2 is a cross-sectional view taken along line 2-2 of Fig. l;
  • Fig. 3 is a bottom view of the needle showing the bevel surfaces formed thereon;
  • Fig. 4 is a cross-sectional view taken along line 4--4 in Fig. 2 showing the shape of the tip of the needle.
  • Fig. 5 is a cross-sectional View taken along the line 5--5 in Fig. 2.
  • a hypodermic needle having a ferrule suitable for attaching the needle to the standard syringe and a body portion 12 affixed thereto.
  • the body 12 has a point formed thereon by cutting a cannula at an angle to the medial axis thereof to form an oblique end wall.
  • the upper surface 14 of the end wall is curved and is produced by moving the needle through an arcuate path, while contacting the grinding wheel during the sharpening operation.
  • the curvature of the surface 14 is indicated in Fig. 5 and extends from the needle point to the rearmost end of the end wall.
  • the outer surface of the body 12 is ground to produce a pair of tlat bevel surfaces 16 thereon adjacent the needle point.
  • the surfaces 16 are obtained by holding the cannula stock in fixed relationship to the grinding wheel, while the material of the needle is cut away.
  • the surfaces 16 are joined by an arcuate surface 18 located intermediate the bevel surfaces 16 and tangent thereto.
  • the arcuate surface 18 is produced by rotating the needle, while it is in contact with the grinding wheel.
  • the intersection of the arcuate surface 18 and the curved surface 14 of the end wall is a curve which has a cutting edge 20 extending therealong.
  • the cutting edge 2t) is extended rearwardly by the cutting edges 22 which are at the intersection of the surface 14 and the bevel surfaces 16.
  • the cutting edges 22 extend rearwardly to substantially the full diameter of the needle.
  • the grinding of the needle at the arcuate surface 18 removes the thickness of material ordinarily found in hypodermic needles at the point, thereby producing a thin spade-like point which facilitates the entry of the needle through the skin of a patient.
  • a dulled heel 24 is formed by grinding the edge away.
  • the heel 24 eliminates cutting or damaging the tissue that is drawn into the opening in the needle by the tension in the skin during the insertion thereof.
  • the natural resiliency of the skin is suicient to draw the tiesh over the outside of the needle away from heel 24 as the needle passes into the flesh of the patient.
  • hypodermic needle When the hypodermic needle is formed as disclosed in this application with the continuous cutting edge resulting from the cutting edges 22 and 20 being in alignment, a clean cut incision in the form of a line is made, rather than a ragged punctured hole which results from the use of the conventional needle structure.
  • the dulled heel 24 cooperates with the cutting edges in facilitating the insertion of the needle with a minimum of pain to the patient and damage to the tissue.
  • a further use of this type of needle arises where the needle is incorporated in a set for transfusions of blood or plasma and is inserted through a relatively thick diaphragm or other closure layer ordinarily used for sealing a container against contamination.
  • the spade-point cuts a clean slit through the bottle cover, and the heel 24 prevents the severing of a plug of material which would otherwise enter the interior of the bottle or continue into the lumen of the cannula where it would restrict or prevent ow through the needle. If the stopper material enters the bottle, the contents thereof become unfit for use and the entire set must be discarded.
  • the needle point construction disclosed herein having the spade-point and the dull heel eliminates the possibility of loss of valuable materials.
  • a flesh piercing needle having a longitudinal bore, a pointed end on the needle having a wall lying in a plane intersecting said bore at an angle, beveled surfaces formed on the outer portion of the needle adjacent the end, an arcuate surface joining said beveled surfaces, a cutting edge being formed at the intersection of the beveled and arcuate surfaces with the end wall.
  • a esh piercing needle having a longitudinal bore, a pointed end on the needle having a wall lying in a plane intersecting said bore at an angle, beveled surfaces formed on the outer portion of the needle adjacent the end, an arcuate surface joining said beveled surfaces, a cutting edge being formed at the intersection of the beveled and arcuate surfaces with the end wall, and a dull heel portion at the intersection of the bore and the end wall opposite to the point for preventing cutting of material as the needle is inserted.
  • a esh piercing needle having a longitudinal bore, a pointed end on the needle having an end wall lying in a plane intersecting said bore at an angle, beveled surfaces formed on the outer portion of the needle adjacent the end, an varcuate surface joining said beveled surfaces, said end wall having an arcuate cross section, a cutting edge being formed at the intersection of the beveled and arcuate surfaces with the arcuate end Wall, and a dull heel portion at the intersection of the bore and the end wall opposite to the point.
  • a flesh piercing needle having a longitudinal bore, a pointed end on the needle having an end Wall lying in a plane intersecting said bore at an angle, beveled surfaces forrned on the outer portion of the needle adjacent the end, and an arcuate surface joining said beveled surfaces, said end Wall having an arcuate cross-section, a
  • cutting edge being formed at the intersection of the beveled and arcuate surfaces with the arcuate end Wall.

Description

June 28, 1955 G. w, JAcoBY, JR
HYPODERMIC NEEDLE Filed Aug. 10, 1951 1 Eril /6 JNVENTOR.
GEORGE W. JACBY, J'R.
A rrp/Mens This invention relates to a hypodermic needle or cannula having a cutting point of a particular configurap tion which facilitates the insertion of the needle into human flesh with a minimum of damage to the tissue and pain to the patient.
The most important object of this invention is to provide a spade-like point on the tip of the hypodermic needle which has a knife-like cutting edge extending along the sides of the needle point and around the end of the point.
Another object of this invention is to provide a hypodermic needle which is ground on the outer surface of the needle point for obtaining a thin cross section and a sharper and more durable cutting edge at the end and sides of the point.
A further object of this invention is to provide a hypodermic needle having the rear portion of the needle opening dulled to prevent the cutting of a plug of tissue during insertion of the needle into flesh.
A still further object of this invention is to provide an improved hypodermic needle having a spade-like cutting edge which will pierce the skin and form an opening therein, for entry of the needle, which is clean-cut, thereby reducing the pain and the amount of damage to the tissue to a minimum.
Other objects and advantages more or less ancillary to the foregoing, and the manner in which all the various objects are realized will appear in the following description, which, considered in connection with the accompanying drawings, sets forth the preferred embodiment of the invention.
In the drawings:
Fig. l is a plan view of the needle;
Fig. 2 is a cross-sectional view taken along line 2-2 of Fig. l;
Fig. 3 is a bottom view of the needle showing the bevel surfaces formed thereon;
Fig. 4 is a cross-sectional view taken along line 4--4 in Fig. 2 showing the shape of the tip of the needle; and
Fig. 5 is a cross-sectional View taken along the line 5--5 in Fig. 2.
Referring first to Fig. l, a hypodermic needle is shown having a ferrule suitable for attaching the needle to the standard syringe and a body portion 12 affixed thereto. The body 12 has a point formed thereon by cutting a cannula at an angle to the medial axis thereof to form an oblique end wall. The upper surface 14 of the end wall is curved and is produced by moving the needle through an arcuate path, while contacting the grinding wheel during the sharpening operation. The curvature of the surface 14 is indicated in Fig. 5 and extends from the needle point to the rearmost end of the end wall.
The outer surface of the body 12 is ground to produce a pair of tlat bevel surfaces 16 thereon adjacent the needle point.
The surfaces 16 are obtained by holding the cannula stock in fixed relationship to the grinding wheel, while the material of the needle is cut away. The planes of each ice surface, respectively, intersect at some point beyond the end of the needle.
The surfaces 16 are joined by an arcuate surface 18 located intermediate the bevel surfaces 16 and tangent thereto. The arcuate surface 18 is produced by rotating the needle, while it is in contact with the grinding wheel. The intersection of the arcuate surface 18 and the curved surface 14 of the end wall is a curve which has a cutting edge 20 extending therealong. The cutting edge 2t) is extended rearwardly by the cutting edges 22 which are at the intersection of the surface 14 and the bevel surfaces 16. The cutting edges 22 extend rearwardly to substantially the full diameter of the needle. The grinding of the needle at the arcuate surface 18 removes the thickness of material ordinarily found in hypodermic needles at the point, thereby producing a thin spade-like point which facilitates the entry of the needle through the skin of a patient.
At the rearmost portion of the opening in the end of the needle, a dulled heel 24 is formed by grinding the edge away. The heel 24 eliminates cutting or damaging the tissue that is drawn into the opening in the needle by the tension in the skin during the insertion thereof. The natural resiliency of the skin is suicient to draw the tiesh over the outside of the needle away from heel 24 as the needle passes into the flesh of the patient.
When the hypodermic needle is formed as disclosed in this application with the continuous cutting edge resulting from the cutting edges 22 and 20 being in alignment, a clean cut incision in the form of a line is made, rather than a ragged punctured hole which results from the use of the conventional needle structure. The dulled heel 24 cooperates with the cutting edges in facilitating the insertion of the needle with a minimum of pain to the patient and damage to the tissue.
A further use of this type of needle arises where the needle is incorporated in a set for transfusions of blood or plasma and is inserted through a relatively thick diaphragm or other closure layer ordinarily used for sealing a container against contamination. The spade-point cuts a clean slit through the bottle cover, and the heel 24 prevents the severing of a plug of material which would otherwise enter the interior of the bottle or continue into the lumen of the cannula where it would restrict or prevent ow through the needle. If the stopper material enters the bottle, the contents thereof become unfit for use and the entire set must be discarded. The needle point construction disclosed herein having the spade-point and the dull heel eliminates the possibility of loss of valuable materials.
It is to be understood that the specific nature of the present disclosure is not intended to be restrictive or contining and that various rearrangements of parts and modilications of design may be resorted to without departing from the scope or spirit of the invention as herein claimed.
I claim:
l. A flesh piercing needle having a longitudinal bore, a pointed end on the needle having a wall lying in a plane intersecting said bore at an angle, beveled surfaces formed on the outer portion of the needle adjacent the end, an arcuate surface joining said beveled surfaces, a cutting edge being formed at the intersection of the beveled and arcuate surfaces with the end wall.
2. A esh piercing needle having a longitudinal bore, a pointed end on the needle having a wall lying in a plane intersecting said bore at an angle, beveled surfaces formed on the outer portion of the needle adjacent the end, an arcuate surface joining said beveled surfaces, a cutting edge being formed at the intersection of the beveled and arcuate surfaces with the end wall, and a dull heel portion at the intersection of the bore and the end wall opposite to the point for preventing cutting of material as the needle is inserted.
3. A esh piercing needle having a longitudinal bore, a pointed end on the needle having an end wall lying in a plane intersecting said bore at an angle, beveled surfaces formed on the outer portion of the needle adjacent the end, an varcuate surface joining said beveled surfaces, said end wall having an arcuate cross section, a cutting edge being formed at the intersection of the beveled and arcuate surfaces with the arcuate end Wall, and a dull heel portion at the intersection of the bore and the end wall opposite to the point.
4. A flesh piercing needle having a longitudinal bore, a pointed end on the needle having an end Wall lying in a plane intersecting said bore at an angle, beveled surfaces forrned on the outer portion of the needle adjacent the end, and an arcuate surface joining said beveled surfaces, said end Wall having an arcuate cross-section, a
cutting edge being formed at the intersection of the beveled and arcuate surfaces with the arcuate end Wall.
References Cited in the le of this patent UNiTED STATES PATENTS 1,975,360 Harrison Oct. 2, 1934 2,402,245 Freeland June 18, 1946 2,409,979 Huber Oct. 22, 1946 2,452,697 Stabler Nov. 2, 1948 2,560,162 Ferguson July 10, 1951 2,601,580 Yanus June 24, 1952 FOREIGN PATENTS 23,711 Norway Sept. 29, 1913
US241261A 1951-08-10 1951-08-10 Hypodermic needle Expired - Lifetime US2711733A (en)

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2904045A (en) * 1958-04-14 1959-09-15 Owings Thomas Hypodermic needles
US3007472A (en) * 1957-04-22 1961-11-07 Abbott Lab Hub structure
US3071135A (en) * 1960-01-27 1963-01-01 Mfg Process Lab Inc Hollow needle
US3090384A (en) * 1960-04-15 1963-05-21 Mfg Process Lab Inc Needle
US3448740A (en) * 1966-06-24 1969-06-10 Frank H J Figge Nonheel shaving hypodermic needle
US4490139A (en) * 1983-01-28 1984-12-25 Eli Lilly And Company Implant needle and method
US4666438A (en) * 1985-07-02 1987-05-19 Raulerson J Daniel Needle for membrane penetration
US4834722A (en) * 1981-03-07 1989-05-30 Michael Zenz Injection assembly for blocking peripheral nerves, for instance for plexus anaesthesia
US4869259A (en) * 1988-05-17 1989-09-26 Vance Products Incorporated Echogenically enhanced surgical instrument and method for production thereof
US4889529A (en) * 1987-07-10 1989-12-26 B. Braun Melsungen Ag Needle
EP1157677A2 (en) * 2000-05-25 2001-11-28 Pajunk GmbH Device for applying bone cement and cannula for such a device
US20090192486A1 (en) * 2001-11-02 2009-07-30 Meridian Medical Technologies ,Inc Automatic injector with anti-coring needle
US20100294796A1 (en) * 2007-11-06 2010-11-25 Jacques Thilly Pyramid shaped needle point
US8568422B2 (en) 2008-09-01 2013-10-29 Nigel Morlet Cutting needle tip for surgical instrument
US9566189B2 (en) 2011-08-03 2017-02-14 Nigel Morlet Grooved needle tip for surgical instrument
US9700304B2 (en) 2010-04-19 2017-07-11 Gold Thread Llc Filament implant system and method
US9867736B2 (en) 2010-03-29 2018-01-16 Nigel Morlet Needle tip for surgical instrument

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1975360A (en) * 1933-02-28 1934-10-02 Benjamin C Harrison Holder for hypodermic needles
US2402245A (en) * 1945-08-06 1946-06-18 Ward C Freeland Needle sharpening device
US2409979A (en) * 1946-03-14 1946-10-22 Ralph L Huber Hypodermic needle
US2452697A (en) * 1947-05-20 1948-11-02 Stabler Robinson Ryland Device for sharpening hypodermic needles
US2560162A (en) * 1950-02-10 1951-07-10 Becton Dickinson Co Needle structure
US2601580A (en) * 1951-01-24 1952-06-24 Bronislow J Yanus Hypodermic needle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1975360A (en) * 1933-02-28 1934-10-02 Benjamin C Harrison Holder for hypodermic needles
US2402245A (en) * 1945-08-06 1946-06-18 Ward C Freeland Needle sharpening device
US2409979A (en) * 1946-03-14 1946-10-22 Ralph L Huber Hypodermic needle
US2452697A (en) * 1947-05-20 1948-11-02 Stabler Robinson Ryland Device for sharpening hypodermic needles
US2560162A (en) * 1950-02-10 1951-07-10 Becton Dickinson Co Needle structure
US2601580A (en) * 1951-01-24 1952-06-24 Bronislow J Yanus Hypodermic needle

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3007472A (en) * 1957-04-22 1961-11-07 Abbott Lab Hub structure
US2904045A (en) * 1958-04-14 1959-09-15 Owings Thomas Hypodermic needles
US3071135A (en) * 1960-01-27 1963-01-01 Mfg Process Lab Inc Hollow needle
US3090384A (en) * 1960-04-15 1963-05-21 Mfg Process Lab Inc Needle
US3448740A (en) * 1966-06-24 1969-06-10 Frank H J Figge Nonheel shaving hypodermic needle
US4834722A (en) * 1981-03-07 1989-05-30 Michael Zenz Injection assembly for blocking peripheral nerves, for instance for plexus anaesthesia
US4490139A (en) * 1983-01-28 1984-12-25 Eli Lilly And Company Implant needle and method
US4666438A (en) * 1985-07-02 1987-05-19 Raulerson J Daniel Needle for membrane penetration
US4889529A (en) * 1987-07-10 1989-12-26 B. Braun Melsungen Ag Needle
EP0443630A1 (en) * 1987-07-10 1991-08-28 B. Braun Melsungen AG Cannula
US4869259A (en) * 1988-05-17 1989-09-26 Vance Products Incorporated Echogenically enhanced surgical instrument and method for production thereof
WO1989011250A1 (en) * 1988-05-17 1989-11-30 Vance Products Incorporated D/B/A Cook Urological Echogenically enhanced surgical instrument and production method
EP1157677A2 (en) * 2000-05-25 2001-11-28 Pajunk GmbH Device for applying bone cement and cannula for such a device
US7883512B2 (en) 2000-05-25 2011-02-08 Pajunk Ohg Besitzverwaltung Apparatus for the application of bone cement
EP1157677A3 (en) * 2000-05-25 2002-02-06 Pajunk GmbH Device for applying bone cement and cannula for such a device
US20050124997A1 (en) * 2000-05-25 2005-06-09 Pajunk Ohg Besitzverwaltung Apparatus for the application of bone cement and a cannula for such an apparatus
EP1726274A1 (en) * 2000-05-25 2006-11-29 Pajunk OHG Besitzverwaltung Cannula for a device for applying bone cement
US20020013553A1 (en) * 2000-05-25 2002-01-31 Pajunk Gmbh Apparatus for the application of bone cement and a cannula for such an apparatus
US20090192486A1 (en) * 2001-11-02 2009-07-30 Meridian Medical Technologies ,Inc Automatic injector with anti-coring needle
US7569035B1 (en) 2001-11-02 2009-08-04 Meridian Medical Technologies, Inc. Automatic injector with anti-coring needle
US20100294796A1 (en) * 2007-11-06 2010-11-25 Jacques Thilly Pyramid shaped needle point
US8720501B2 (en) * 2007-11-06 2014-05-13 Aseptic Technologies S.A. Pyramid shaped needle point
US8568422B2 (en) 2008-09-01 2013-10-29 Nigel Morlet Cutting needle tip for surgical instrument
US9867736B2 (en) 2010-03-29 2018-01-16 Nigel Morlet Needle tip for surgical instrument
US9700304B2 (en) 2010-04-19 2017-07-11 Gold Thread Llc Filament implant system and method
US9566189B2 (en) 2011-08-03 2017-02-14 Nigel Morlet Grooved needle tip for surgical instrument

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