Disposable front loadable syringe and injector

Abstract

A syringe for an injector that has at its nozzle end a connection to the fluid delivery tubing that prevents, reduces, or eliminates fluid leaks, by virtue of a ridge on the external surfaces of the connector which engage to tubing. Furthermore, the syringe and injector are configured to permit the syringe to be oriented in more than one manner on the injector.

1 . A syringe for a front loadable injector for injecting liquid into a patient a disposable syringe comprising: 
 a hollow elongated cylindrical a tubular body having a fluid holding cavity at least partially contained therein, a front end, and a back end having a circular outer periphery with an opening therethrough;    the front end of the tubular body having a front wall sealed thereto with a discharge neck extending therefrom for communicating fluid from the cavity;    the discharge neck having a tubing connector at remote end thereon comprising at least one ridge along the peripheral circumference of the connector; and    the tubular body having a plunger slidably supported and moveable longitudinally therein between the back end and the front end thereof and forming a fluid tight seal therewith to seal the cavity.    
   
   
       2 . The syringe of  claim 1  wherein the tubing connector has at least a six degree taper extending from a proximal end of the connector to a distal end of the connector.  
   
   
       3 . The syringe of  claim 2  wherein the tubing connector has a first ridge along the peripheral circumference of the distal end of the connector and second ridge midway between the proximal end and the distal end of the connector that contact with the inner circumferential surface of the fluid delivery tube.  
   
   
       4 . The syringe of  claim 1  further comprising: 
 at least one peripheral projection fixed with respect to the body of the syringe and located thereon, the projection being located at the back end of the body and interrupting the periphery and forming a key receiving position of the syringe to engage a peripheral tab of a syringe engaging interface;    a lock permanently fixed to the syringe proximate the front end of the tubular body and connected at least in part to the pressure restraining structure of the front wall of the syringe; and    the lock including internal threads lying outwardly of the body of the syringe and fixed to the syringe proximate the front end of the tubular body.    
   
   
       5 . The disposable replacement syringe of  claim 4  wherein: 
 the at least one peripheral projection includes four equally spaced projections.    
   
   
       6 . The disposable replacement syringe of  claim 1  wherein the front wall includes: 
 a cap separately formed and permanently fixed to the front end of the body and disposable therewith, the lock being carried at least in part by the cap.    
   
   
       7 . The disposable replacement syringe of  claim 1  further comprising: 
 the pressure restraining structure is formed of material separate from that of the front wall of the syringe and is non-removeably fixed to the front wall to be disposable with the syringe.    
   
   
       8 . A front loading injector comprising: 
 a syringe engaging device for use for engaging a syringe as in  claim 1  of an injector comprising:    a rotatable ring to engage a syringe retaining and locking mechanism associated with the injector; and,    a corresponding member of the engaging device to engage at least one corresponding key engaging structure associated with a syringe to the syringe engaging device on the injector.    
   
   
       9 . The front loading injector of  claim 8  wherein the rotatable ring comprises: 
 a handle extending radially outward from outer peripheral circumference of the ring;    an inner periphery wherein the corresponding member of the engaging device extends radially inward.    
   
   
       10 . The front loading injector of  claim 9  wherein the rotatable ring further comprises a magnet in the body of the ring.  
   
   
       11 . The front loading injector of  claim 9  wherein the corresponding member of the engaging device is a key or tab.  
   
   
       12 . A syringe for a front loadable injector for injecting liquid into a patient a disposable syringe comprising: 
 a hollow elongated a tubular body having a cylindrical outer surface, a fluid holding cavity at least partially contained therein, a front end, and a back end having a circular outer periphery with an opening therethrough, the periphery of the back end including at least four projections of said cylindrical body extending said cylindrical surface thereof, said projections being spaced annularly around said periphery;    a discharge neck at a front end of said tubular body; and    a plunger slidably supported within said tubular body and moveable longitudinally therein between the back end and the front end thereof and forming a fluid tight seal therewith to seal the cavity.    
   
   
       13 . The syringe of  claim 12  further comprising: 
 a lock permanently fixed to the syringe proximate the front end of the tubular body and connected at least in part to a front wall of the syringe; and the lock including internal threads lying outwardly of the body of the syringe and fixed to the syringe proximate the front end of the tubular body.    
   
   
       14 . A front loading injector comprising: 
 a syringe as in  claim 12  fitted to injector mounting structure comprising: a rotatable ring to engage a syringe retaining and locking mechanism associated with the injector; and,    a corresponding member of the engaging device to engage said projections of said syringe.    
   
   
       15 . The front loading injector of  claim 14  wherein the rotatable ring comprises: 
 a handle extending radially outward from outer peripheral circumference of the ring; and    an inner periphery;    wherein the corresponding member of the engaging device extends radially inward.    
   
   
       16 . The front loading injector of  claim 14  wherein the rotatable ring further comprises a magnet in the body of the ring.  
   
   
       17 . The front loading injector of  claim 14  wherein the corresponding member of the engaging device comprises a key or tab.  
   
   
       18 . The front loading injector of  claim 17  wherein the corresponding member of the engaging device comprises three keys or tabs fittable between the projections of the syringe.