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Needle assembly and method of producing said assembly

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US2665689A
US2665689A US23505151A US2665689A US 2665689 A US2665689 A US 2665689A US 23505151 A US23505151 A US 23505151A US 2665689 A US2665689 A US 2665689A
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Prior art keywords
needle
assembly
cannula
invention
assemblies
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William F Butler
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CUTTER LAB
CUTTER LABORATORIES
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CUTTER LAB
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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
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/02Blood transfusion apparatus

Description

Jan. 12, 1954 w. F. BUTLER NEEDLE ASSEMBLY AND METHOD OF PRODUCING SAID ASSEMBLY Filed "July 3, 1951 INVENTOR. ZU/LL/AM E 19072:?

HTTOP/VEXI Patented Jan. 12, 1954 NEEDLE ASSEIVIBLY AND METHOD OF PRODUCING SAID ASSEMBLY William F. Butler, Oakland, Calif., assignor to Cutter Laboratories, Berkeley, Calif., a corporation of California Application July 3, 1951, Serial No. 235,051

1 Claim. 1

This invention relates to hollow needle assemblies for use in taking blood from a donor and for establishing communication between the interior and exterior of an intravenous solution flask.

Presently, needle assemblies of this character consist of a hollow needle or cannula bonded to a metal hub to which the usual elastomer tubing is connected and which serves as a finger grip for manipulating the device. The connection between the cannula and hub must be airtight for frequently the device is used in conjunction with a partially evacuated flask. The assembly must be fairly rugged for the needle sometimes has to be forced through a substantial length of rubber stopper.

In general the object of this invention is the provision of a needle assembly fulfilling the above conditions and which also can be made at a price sufliciently low to permit of its being thrown away after its first use so as to avoid the inconvenience and cost of sterilizing it for further use and the danger of improper sterilization.

More specifically, the object of this invention is the provision of a needle assembly including a metal cannula having a roughened outer surface and a plastic hub molded thereto in airtight sealing engagement therewith.

The invention possesses other advantageous features, some of which, with the foregoing, will be set forth at length in the following description where that form of the invention which has been selected for illustration in the drawings accompanying and forming a part of the specification is outlined in full.

In said drawings, two forms of the invention are shown, but it is to be understood that it is not limited to such forms, since the invention as set forth in the claim may be embodied in other forms.

Referring to the drawings:

Fig. 1 is a plan view of a pair of needle assemblies attached to the opposite ends of a section of elastomer tubing and each embodying the objects of my invention.

Fig. 2 is an axial mid-section taken through the lower of the two needle assemblies illustrated in Fig. 1.

assemblies includes a hollow stainless steel or cannula needle I having a beveled point 2 and an extended sandblasted peripheral surface 3. Molded to the sandblasted portion of the cannula I is a plastic (polystyrene) hub 4 provided intermediate its ends with a radial flange 5 and a formed inner end with a counterbore or recess 6. As illustrated in Fig. 1 the inner recessed end of each assembly is connected to a section of elastomer tubing 1. The only difference between the two assemblies illustrated resides in the flanges 5, the flange of upper assembly being somewhat larger than the lower assembly and slightly dished.

Contrary to the expectations of those skilled in the art I have found that the surface of a stainless steel cannula can be roughed sufliciently by sandblasting or by acid etching to enable an air-tight seal to be made between the cannula and a plastic hub molded thereto and to provide a bond strength of greater than 40 pounds of axial force.

As a result of this expedient, my assignee, Cutter Laboratories, is now able to market needle assemblies having plastic hubs at a price permitting of their disposal once they have been used and therefore obviating the sterilization required of the more costly all-metal assemblies.

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

A needle assembly comprising: a stainless steel cannula having a sandblasted outer surface portion; and a plastic hub molded around said cannula about said sandblasted outer surface portion, said hub being formed with a radially extending flange intermediate its ends.

WILLIAM F. BUTLER.

References Cited in the file of this patent UNITED STATES PATENTS Number

US2665689A 1951-07-03 1951-07-03 Needle assembly and method of producing said assembly Expired - Lifetime US2665689A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748538A (en) * 1954-04-01 1956-06-05 Becton Dickinson Co Hypodermic needle and cannula cleaning apparatus
US2816545A (en) * 1953-06-18 1957-12-17 George W Jacoby Fluid transfer apparatus
US2876740A (en) * 1956-09-07 1959-03-10 Burgess Manning Co Recorder pen assembly
US2911971A (en) * 1954-01-21 1959-11-10 American Can Co Syringe
US3066652A (en) * 1957-10-11 1962-12-04 Waterman Bic Pen Corp Reservoir writing instruments
US3093134A (en) * 1959-01-19 1963-06-11 Brunswick Corp Needle with molded hub
US3822701A (en) * 1972-09-06 1974-07-09 Nosco Plastics Adaptor for hypodermic syringe
US4723947A (en) * 1986-04-09 1988-02-09 Pacesetter Infusion, Ltd. Insulin compatible infusion set
US5336177A (en) * 1993-04-29 1994-08-09 Marcus William Y Integral penetrating surgical drain device
US20030088234A1 (en) * 2000-05-26 2003-05-08 Baxter International Inc. Needle design and manufacturing method for medical applications
US20100130958A1 (en) * 2008-11-26 2010-05-27 David Kang Device and Methods for Subcutaneous Delivery of High Viscosity Fluids
US20110238037A1 (en) * 2010-03-19 2011-09-29 Chorng-Fure Robin Hwang Gas-pressured medication delivery device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US222229A (en) * 1879-12-02 Leonard s
US600803A (en) * 1898-03-15 Hypodermic syringe
GB191515900A (en) * 1915-11-11 1916-10-26 Charles William Gould Improvements in Hypodermic Needles and Process for Making same.
FR574278A (en) * 1923-12-10 1924-07-09 Mode setting syringes and needles for injections
US2217602A (en) * 1938-05-12 1940-10-08 Macgregor Instr Company Hypodermic needle
US2551414A (en) * 1947-11-24 1951-05-01 Lilly Co Eli Syringe

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US222229A (en) * 1879-12-02 Leonard s
US600803A (en) * 1898-03-15 Hypodermic syringe
GB191515900A (en) * 1915-11-11 1916-10-26 Charles William Gould Improvements in Hypodermic Needles and Process for Making same.
FR574278A (en) * 1923-12-10 1924-07-09 Mode setting syringes and needles for injections
US2217602A (en) * 1938-05-12 1940-10-08 Macgregor Instr Company Hypodermic needle
US2551414A (en) * 1947-11-24 1951-05-01 Lilly Co Eli Syringe

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2816545A (en) * 1953-06-18 1957-12-17 George W Jacoby Fluid transfer apparatus
US2911971A (en) * 1954-01-21 1959-11-10 American Can Co Syringe
US2748538A (en) * 1954-04-01 1956-06-05 Becton Dickinson Co Hypodermic needle and cannula cleaning apparatus
US2876740A (en) * 1956-09-07 1959-03-10 Burgess Manning Co Recorder pen assembly
US3066652A (en) * 1957-10-11 1962-12-04 Waterman Bic Pen Corp Reservoir writing instruments
US3093134A (en) * 1959-01-19 1963-06-11 Brunswick Corp Needle with molded hub
US3822701A (en) * 1972-09-06 1974-07-09 Nosco Plastics Adaptor for hypodermic syringe
US4723947A (en) * 1986-04-09 1988-02-09 Pacesetter Infusion, Ltd. Insulin compatible infusion set
US5336177A (en) * 1993-04-29 1994-08-09 Marcus William Y Integral penetrating surgical drain device
US20030088234A1 (en) * 2000-05-26 2003-05-08 Baxter International Inc. Needle design and manufacturing method for medical applications
US7024749B2 (en) * 2000-05-26 2006-04-11 Baxter International Inc. Method for manufacturing a cannula assembly
US20100130958A1 (en) * 2008-11-26 2010-05-27 David Kang Device and Methods for Subcutaneous Delivery of High Viscosity Fluids
US20110238037A1 (en) * 2010-03-19 2011-09-29 Chorng-Fure Robin Hwang Gas-pressured medication delivery device
US8551071B2 (en) 2010-03-19 2013-10-08 Halozyme, Inc. Gas-pressured medication delivery device

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