Hypodermic syringe needle mounting

• US 3,994,295 A
• Filed: 08/22/1975
• Issued: 11/30/1976
• Est. Priority Date: 08/22/1975
• Status: Expired due to Term

• Current Assignee: Goldwyn L. Wulff
• Original Assignee: Goldwyn L. Wulff
• Inventors: Wulff, Goldwyn L.
• Primary Examiner(s): Yasko, John D.
• Application Number:
  US05/606,769
• Time in Patent Office: 466 Days
• Field of Search: 128/215, 128/216, 128/218 R, 128/218 N, 128/220, 128/221, 128/239
• US Class Current: 604/241
• CPC Class Codes: A61M 2005/341 angularly adjustable or angled away from the axis of the injector
• CPC Class Codes: A61M 5/34 Constructions for connecting the needle , e.g. to syringe nozzle or needle hub connecting catheter tubes to hubs A61M25/0014

Abstract

An adapter device for mounting a hypodermic needle on a syringe barrel consists of two telescoped elements the outer of which is a casing or shell and the inner or which is a resilient tube bonded at opposite ends to a stem adapted for connection to the barrel and a needle mounting member seated over the end of the shell.

Claims

1. A device for mounting a hypodermic needle on a syringe barrel comprising a relatively stiff tubular casing having means at one end for attachment to said barrel and means at the other end for mounting a hollow needle, means defining an annular seating face at said other end of said casing, said needle mounting means comprising a rigid needle attachment member that extends transversely of said casing and has a through fluid discharge opening and an associated needle connection and is seated on said face and means in the casing normally resiliently biasing said member onto said face but permitting tilting of said member relative to said face in response to predetermined lateral forces on the needle.

2. The device defined in claim 1, wherein said resilient biasing means is a tubular body serving also as a fluid conduit extending longitudinally through said casing.

3. The device defined in claim 1, wherein said attachment means at said one end comprises a hollow threaded stem, and said resilient biasing means comprises a tubular body within said casing fixedly bonded at opposite ends to said stem and said needle attachment member to provide a fluid pressure tight conduit to said discharge opening.

4. The device defined in claim 3, wherein said body is resilient and effectively lines the internal periphery of said casing.

5. The device defined in claim 1, wherein said casing is substantially cylindrical with said other end being substantially fully open and surrounded by an axially outwardly facing shoulder forming said face, and said needle attachment member is a plate-like element extending across said open end of the casing and seated on said shoulder.

6. The device defined in claim 5, including an outwardly flared casing lip surrounding said needle attachment member.

7. A device for mounting a hypodermic needle on a syringe barrel comprising a relatively stiff tubular casing having means at one end for attachment to said barrel and means at the other end for mounting a hollow needle, said needle mounting means comprising a needle attachment member that has a through fluid discharge opening and an associated needle connection and is seated on said other end of the casing and flexible means in the casing resiliently permitting tilting of said member relative to its seat in response to predetermined lateral forces on the needle, said casing being substantially cylindrical with said other end being substantially fully open and surrounded by an axially outwardly facing shoulder, said needle attachment member being a plate-like element extending across said open end of the casing and seated on said shoulder, said means for attaching the casing to the barrel comprising a hollow stem extending through an opening in an end wall of said casing and formed with a flange within said casing, and said flexible means comprising a resilient tubular body effectively lining said casing in telescoping frictional contact therewith and bonded at opposite ends to said stem flange and said needle attachment member.

8. The device defined in claim 7, wherein said resilient body has an end wall bonded to said stem flange, and said stem is externally threaded outside said casing end wall.

9. The device defined in claim 8, wherein an axially facing ledge surrounds the opening in the casing end wall for engaging and compressing a resilient seal ring on said threaded stem portion when the device is mounted on the syringe barrel by turning said stem into a threaded outlet in the end wall of the barrel.