EP0174011A2
Expired / Lapsed
EP
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Medical puncture needle
Assignee: Terumo Corp
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Filing: 1985-09-03
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Granted: —
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Expires: 2005-09-03
Abstract
Abstract A medical puncture needle is molded with a mixture of thermoplastic resin and a fibrous material dispersed in the resin and, therefore, is endowed with hardness exceeding 100 on the Rockwell hardness R scale and enabled to pierce an elastic of flexible object.
Inventors
- 👤 Hiroshi Hirokawa
- 👤 Tsuneo Nakada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 14:49
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/162; A61M2205/00; A61M2205/19; A61M2205/192; A61M2205/195
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
41 words
A medical puncture needle, molded with a mixture of thermoplastic resin and a fibrous material dispersed in said resin and, thereby, endowed with hardness exceeding 100 on the Rockwell hardness R scale and enabled to pierce an elastic or flexible object.
Claim 2
Dependent Claim
41 words
A medical puncture needle, molded with a mixture of thermoplastic resin and a fibrous material dispersed in said resin and, thereby, endowed with hardness exceeding 100 on the Rockwell hardness R scale and enabled to pierce an elastic or flexible object.
Claim 3
Dependent Claim
32 words
A medical puncture needle according to Claim 1, wherein said fibrous material is incorporated in an amount of to parts by weight, based on 100 parts by weight of said thermoplastic resin.
Claim 4
Dependent Claim
18 words
A medical puncture needle according to Claim 1, weherein said fibrous material is glass fibers or carbon fibers.
Claim 5
Dependent Claim
28 words
A medical puncture needle according to Claim 3, wherein the individual fibers of said fibrous material have diameters not exceeding 25 um and lengths not exceeding 30 mm.
Claim 6
Dependent Claim
26 words
A medical puncture needle according to Claim 2, wherein said thermoplastic resin is selected from the group consisting of polyolefins, ABS resin, and thermoplastic polyester resins.
Claim 7
Dependent Claim
14 words
A medical puncture needle according to Claim 5, wherein said thermoplastic resin is polyolefin.
Claim 8
Dependent Claim
13 words
A medical puncture needle according to Claim 6, wherein said polyolefin is polypropylene.
Claim 9
Dependent Claim
17 words
A medical puncture needle according to Claim 5, wherein said thermoplastic resin is a thermoplastic polyester resin.
Claim 10
Dependent Claim
16 words
A medical puncture needle according to Claim 8, wherein said thermoplastic polyester resin is polyethylene terephthalate.
Claim 11
Dependent Claim
17 words
A medical puncture needle according to Claim 2, wherein said thermoplastic resin is resistant to gamma ray.
Claim 12
Dependent Claim
29 words
A medical puncture needle according to Claim 3, wherein said fibrous material is glass fibers coated with an agent capable of enhacing affinity of said fibers for the resin.
Claim 13
Dependent Claim
18 words
A medical puncture needle according to Claim 1, having hardness exceeding 110 on the Rockwell hardness R scale.
Claim 14
Dependent Claim
41 words
A medical puncture needle according to Claim 1, having a hollow portion throughout the entire length thereof except for a piercing tip portion thereof and said piercing having a substantially curved surface not more than 1.0 mm in radius of curvature.
Claim 15
Dependent Claim
14 words
A medical puncture needle according to Claim 1, which is formed by injection molding.
References Cited (Backward Citations)
No citation records indexed.
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