Structure for infusion catheter needle

• US 6,221,058 B1
• Filed: 02/01/2000
• Issued: 04/24/2001
• Est. Priority Date: 02/01/2000
• Status: Expired due to Fees

• Current Assignee: Kuei-Chun Chen, Wang-Hsiang Kao
• Original Assignee: Kuei-Chun Chen, Wang-Hsiang Kao
• Inventors: Chen, Kuei-Chun, Kao, Wang-Hsiang
• Primary Examiner(s): Kennedy, Sharon
• Assistant Examiner(s): WILLIAMS, CATHERINE SERKE
• Application Number:
  US09/495,377
• Time in Patent Office: 448 Days
• Field of Search: 604/192, 604/198, 604/110, 604/263, 604/162, 604/272
• US Class Current: 604/263
• CPC Class Codes: A61M 25/0631 having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle
• CPC Class Codes: A61M 5/322 Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston devices for protecting guide needles in combination with catheters A61M25/0612

Abstract

An improved structure of infusion catheter needle, comprised of a infusion soft needle, a steel needle protection, a steel needle and a steel needle chute; within, the chute is a long narrow casing provided with a catch above and an opening below, a catch is provided each on the external side close to where above the opening; a barrel to connect air exchange and blood back-flow mechanism is provided at a steel needle base in the chute; a square eyelet is each provided at both sides to the base to penetrate into the catch part of the chute for the base to move within the chute and engage the catch; a rubber plug provided at the tip of a one end in cone shape of the needle protection is inserted into the needle tube to secure the steel needle therein while the other end of the needle protection is provided with a joint to be inserted into the catch part, and a square eyelet corresponding to that from the base is each provided on both sides of the joint; so that after use, the steel needle is secured by the catch part and the needle is received in the protection to prevent the medical personnel from accidental needlestick injury which may lead to HIV, hepatitis B and C, and to ensure the disposal safety.

Claims

1. An intravenous catheter needle comprising:

a) a needle chute having an elongated configuration with two opposite sides, a first catch extending outwardly from each of the two opposite sides at a first end of the needle chute, and a second catch extending outwardly from each of the two opposite sides adjacent to a second end of the needle chute;

b) a protection member having a joint section with outwardly extending first eyelets engaging the first catches so as to attach the protection member to the first end of the needle chute, the protection member having a hollow cone extending therefrom and a rubber plug located in the hollow case;

c) a plastic needle tube extending from the hollow cone, the plastic needle tube having a distal end; and

,

d) a steel needle having a base with second eyelets extending outwardly therefrom slidably engaging the two opposite sides of the needle chute such that the steel needle is movable between a first position, wherein a distal end of the steel needle extends beyond the distal end of the plastic needle, and a second position wherein the distal end of the steel needle is located within the rubber plug, the steel needle being retained in the second position by engagement of the second eyelets with the second catches.