Negator spring-powered syringe
First Claim
1. A negator spring-powered syringe having a compact sized non-linear compartment for said negator spring comprising a centrally disposed circular-shaped spindle having a peripheral surface for supporting movement therealong of a piston rod for said syringe, plural interconnected spheres serving as said piston rod disposed against said spindle support surface and extending therealong such that a distal positioned sphere is in a clearance position from said syringe and a proximal positioned sphere is in an adjacent position thereto, and a negator spring in an uncoiled configuration connected to extend from said proximal positioned sphere in encircling relation about said plural interconnected spheres into engaged relation with said distal positioned sphere, whereby during the coiling of said negator spring said connection to said distal positioned sphere urges said plural interconnected spheres in a circular path along said spindle support surface and into said syringe led by said proximal positioned sphere to thereby obviate the need of a linear oriented compartment for storing said interconnected spheres during non-use.
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Accused Products
Abstract
A negator spring-powered I.V. pump of compact size resulting from imparting a non-circular, rather than a linear configuration to the negator spring; the non-circular configuration taking up less size or linear dimension which, added to the linear dimension of the syringe of the pump, results in an optimum reduced overall pump size that is convenient for portable ambulatory I.V. therapy.
201 Citations
4 Claims
- 1. A negator spring-powered syringe having a compact sized non-linear compartment for said negator spring comprising a centrally disposed circular-shaped spindle having a peripheral surface for supporting movement therealong of a piston rod for said syringe, plural interconnected spheres serving as said piston rod disposed against said spindle support surface and extending therealong such that a distal positioned sphere is in a clearance position from said syringe and a proximal positioned sphere is in an adjacent position thereto, and a negator spring in an uncoiled configuration connected to extend from said proximal positioned sphere in encircling relation about said plural interconnected spheres into engaged relation with said distal positioned sphere, whereby during the coiling of said negator spring said connection to said distal positioned sphere urges said plural interconnected spheres in a circular path along said spindle support surface and into said syringe led by said proximal positioned sphere to thereby obviate the need of a linear oriented compartment for storing said interconnected spheres during non-use.
Specification