Fluid delivery device, transcutaneous access tool and insertion mechanism for use therewith

Abstract

Disclosed is a fluid delivery device including a fluid reservoir and a transcutaneous access tool fluidly coupled to the fluid reservoir, wherein the transcutaneous access tool includes a needle or a trocar. The fluid delivery device may further include a transcutaneous access tool insertion mechanism for deploying the transcutaneous access tool, wherein the insertion mechanism is configured to insert and retract the needle/trocar in a single, uninterrupted motion.

What is claimed is: 
     
         1 . A transcutaneous access tool insertion and retraction mechanism, comprising:
 a needle located within a cannula;   a first sliding member coupled with the needle and operable to move the needle in an insertion direction and in a retraction direction;   a second sliding member coupled with the cannula and operable to move the cannula in the insertion direction; and   a first linkage and a second linkage coupled between a torsion spring and the first sliding member such that, upon deployment, the torsion spring causes the first and second linkages to cooperate to move the first sliding member in the insertion direction and the retraction direction in a single, uninterrupted motion.   
     
     
         2 . The transcutaneous access tool insertion and retraction mechanism of  claim 1 ,
 wherein, upon deployment, the first linkage and the second linkage are arranged to rotate relative to each other about a moving pivot to move the first sliding member in the insertion direction and the retraction direction.   
     
     
         3 . The transcutaneous access tool insertion and retraction mechanism of  claim 1 , further comprising:
 a frame slidably receiving the first and second sliding members, wherein the frame is operable to lock the first and second sliding members in a pre-deployment position, and to lock the second sliding member in a post-deployment position.   
     
     
         4 . The transcutaneous access tool insertion and retraction mechanism of  claim 3 , wherein the frame includes a cam element configured to lock the first and second sliding members in the pre-deployment position. 
     
     
         5 . The transcutaneous access tool insertion and retraction mechanism of  claim 4 , further comprising a release bar configured to hold the cam element when the cam element locks the first and second sliding members in the pre-deployment position and configured to release the cam element to allow the first and second sliding members to move in the insertion direction. 
     
     
         6 . A transcutaneous access tool insertion and retraction mechanism, comprising:
 a plurality of sliding members; and   a linkage mechanism coupled to a first sliding member of the plurality of sliding members,   wherein the linkage mechanism is configured to apply a force to the plurality of sliding members to move the plurality of sliding members including the first sliding member in an insertion direction and move only the first sliding member in a retraction direction.   
     
     
         7 . The transcutaneous access tool insertion and retraction mechanism of  claim 6 , further comprising:
 a torsion spring coupled to the linkage mechanism, wherein the torsion spring, when releasing stored energy, is operable to cause the linkage mechanism to apply the force to the plurality of sliding members.   
     
     
         8 . The transcutaneous access tool insertion and retraction mechanism of  claim 7 , wherein the linkage mechanism is configured to:
 upon deployment, the torsion spring causes the first linkage and second linkage to cooperate to move the first sliding member in the insertion direction and in the retraction direction in a single, uninterrupted motion.   
     
     
         9 . The transcutaneous access tool insertion and retraction mechanism of  claim 7 , wherein the linkage mechanism is configured to:
 upon deployment, the first linkage and the second linkage are arranged to rotate relative to each other about a moving pivot to move the first sliding member in the insertion direction and the retraction direction.   
     
     
         10 . The transcutaneous access tool insertion and retraction mechanism of  claim 6 , wherein the linkage mechanism comprises:
 a first linkage and a second linkage, wherein the first linkage is coupled to a torsion spring having stored energy, the second linkage is connected to the first sliding member, and the first linkage and the second linkage have a common pivot point.   
     
     
         11 . The transcutaneous access tool insertion and retraction mechanism of  claim 6 , wherein the plurality of sliding members further comprise:
 a second sliding member, wherein the second sliding member is configured to couple with a cannula and operable to be moved in the insertion direction by the first sliding member.   
     
     
         12 . The transcutaneous access tool insertion and retraction mechanism of  claim 11 , further comprising:
 a latch configured to prevent the second sliding member from moving in the retraction direction.   
     
     
         13 . The transcutaneous access tool insertion and retraction mechanism of  claim 6 , wherein the linkage mechanism is spring-biased. 
     
     
         14 . The transcutaneous access tool insertion and retraction mechanism of  claim 6 , further comprising:
 a needle located within a cannula, wherein the cannula and needle are coupled to a respective one or more of the plurality of sliding members.   
     
     
         15 . A transcutaneous access tool insertion and retraction mechanism, comprising:
 a plurality of sliding members;   a needle located within a cannula, wherein the cannula and needle are coupled to a respective one or more of the plurality of sliding members;   a torsion spring, wherein the torsion spring is configured to store energy; and   a linkage mechanism coupled to the torsion spring,   wherein the linkage mechanism is configured to apply a force to the plurality of sliding members when the energy stored in the torsion spring is released.   
     
     
         16 . The transcutaneous access tool insertion and retraction mechanism of  claim 15 , wherein the plurality of sliding members comprises:
 a first sliding member operable to move in an insertion direction and a retraction direction; and   a second sliding member operable to move only in the insertion direction.   
     
     
         17 . The transcutaneous access tool insertion and retraction mechanism of  claim 16 , further comprising:
 a latch configured to lock the second sliding member to prevent the second sliding member from moving in the retraction direction.   
     
     
         18 . The transcutaneous access tool insertion and retraction mechanism of  claim 15 , wherein the linkage mechanism comprises:
 a first linkage and a second linkage, wherein:
 the first linkage is coupled to the torsion spring, 
 the second linkage is connected to the first sliding member, and 
 the first linkage and the second linkage have a common pivot point. 
   
     
     
         19 . The transcutaneous access tool insertion and retraction mechanism of  claim 15 , wherein the needle is configured to move with a first sliding member of the plurality of sliding members. 
     
     
         20 . The transcutaneous access tool insertion and retraction mechanism of  claim 19 , wherein the cannula is configured to move with a second sliding member of the plurality of sliding members.