Hand-piece for injection device with a retractable and rotating needle
First Claim
1. An injection system for injecting a liquid such as a therapeutic agent into a patient, said system comprising:
- a source of liquid;
a hand-piece remote from said source and adapted to be held by the operator during an injection procedure;
a coupling having a first, a second end, and a grove disposed therebetween;
a tubing connected to said second end;
said hand-piece including a hollow housing and a needle supported by said housing and having a first position wherein said needle is disposed in said housing and a second position in which said needle is disposed at least partially outside said housing to provide the injection, said needle being coupled to said first end of said coupling; and
a control member disposed on said hand-piece and coupled to said coupling;
wherein said needle is selectively movable between said first and second positions by said control member; and
wherein said handpiece and said coupling cooperate to cause said needle to translate and rotate simultaneously as said needle is moved along at least a substantial portion of the path between said first and second positions to prevent said needle from bending; and
wherein said coupling is breakable along said groove to allow said tubing to be removed from said hand piece and leaving said needle trapped within said hand-piece.
1 Assignment
0 Petitions
Accused Products
Abstract
An injection device is arranged and constructed to simultaneously rotate a needle during its forward translation as a therapeutic agent such as a liquid is ejected therefrom. In one embodiment the injection device is an automatic device including a pump forcing the liquid through a tube to a hand-piece. The needle has a first position in which it is disposed within a housing of the hand-piece, and a second position in which the needle extends outwardly of the hand-piece so that it can be used to eject the liquid, with the needle being automatically uni- or bi-directionally rotated as it is advanced between the first and second positions. In an alternate positions a syringe is provided with a barrel, a plunger extending into the barrel to eject the liquid through the needle, and a plunger which is pushed into the barrel by the operator.
33 Citations
11 Claims
-
1. An injection system for injecting a liquid such as a therapeutic agent into a patient, said system comprising:
-
a source of liquid; a hand-piece remote from said source and adapted to be held by the operator during an injection procedure; a coupling having a first, a second end, and a grove disposed therebetween; a tubing connected to said second end; said hand-piece including a hollow housing and a needle supported by said housing and having a first position wherein said needle is disposed in said housing and a second position in which said needle is disposed at least partially outside said housing to provide the injection, said needle being coupled to said first end of said coupling; and a control member disposed on said hand-piece and coupled to said coupling; wherein said needle is selectively movable between said first and second positions by said control member; and
wherein said handpiece and said coupling cooperate to cause said needle to translate and rotate simultaneously as said needle is moved along at least a substantial portion of the path between said first and second positions to prevent said needle from bending; andwherein said coupling is breakable along said groove to allow said tubing to be removed from said hand piece and leaving said needle trapped within said hand-piece. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification