Injection Device
First Claim
1. An injection device comprising:
- a housing adapted to receive a syringe having a discharge nozzle and including means for biasing the syringe from an extended position in which the discharge nozzle of the syringe extends from the housing to a retracted position in which the discharge nozzle is contained within the housing;
an actuator;
a drive acted upon by the actuator and in turn acting on the syringe to advance it from its retracted position to its extended position and discharge its contents through the discharge nozzle;
a release mechanism, activated when the drive has been advanced to a nominal release position, to release the syringe from the action of the actuator, whereupon the biasing means restores the syringe to its retracted position; and
a locking mechanism that confines the returned syringe in its retracted position.
2 Assignments
0 Petitions
Accused Products
Abstract
An injection device (210) is described. A housing (212) receives a syringe and includes a return spring (226) for biasing the syringe from an extended position in which its needle (218) extends from the housing (212) to a retracted position in which the it does not. A drive spring (230) acts on a first drive element (232) and a second drive element (234) acts upon the syringe to advance it from its retracted position to its extended position and discharge its contents through the needle. The first drive element (232) is capable of movement relative to the second (234) once a nominal decoupling position has been reached. A release mechanism is activated when the first drive element (234) is further advanced to a nominal release position, to release the syringe (214) from the action of the drive spring (230), whereupon the return spring (226) restores the syringe (214) to its retracted position. A locking mechanism (337, 375) confines the returned syringe in its retracted position.
109 Citations
12 Claims
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1. An injection device comprising:
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a housing adapted to receive a syringe having a discharge nozzle and including means for biasing the syringe from an extended position in which the discharge nozzle of the syringe extends from the housing to a retracted position in which the discharge nozzle is contained within the housing; an actuator; a drive acted upon by the actuator and in turn acting on the syringe to advance it from its retracted position to its extended position and discharge its contents through the discharge nozzle; a release mechanism, activated when the drive has been advanced to a nominal release position, to release the syringe from the action of the actuator, whereupon the biasing means restores the syringe to its retracted position; and a locking mechanism that confines the returned syringe in its retracted position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification