Bladder syringe fluid delivery system

摘要

A bladder syringe for a fluid delivery system includes a cylindrical body, a cap-bladder assembly, a plunger element disposed in the cylindrical body, and a mounting assembly to secure the cap-bladder assembly to the cylindrical body. The cylindrical body has a distal end and a proximal end and defines a throughbore. The cap-bladder assembly is adapted for connection to the distal end of the cylindrical body, and includes a cap body and a bladder. The cap body defines an interior cavity and a distal discharge conduit and is adapted to engage the distal end of the cylindrical body. A disc-shaped bladder is disposed within the interior cavity and typically includes a central membrane portion. The plunger element is disposed in the throughbore of the cylindrical body and is vented to enable evacuation of the space between the plunger element and the cap-bladder assembly in the cylindrical body.

主权项

1. A bladder syringe for a fluid delivery system, the bladder syringe comprising:
a cylindrical body having a sidewall extending between a distal end and a proximal end and defining a throughbore; a cap-bladder assembly adapted for connection to the distal end of the cylindrical body, the cap-bladder assembly comprising:
a cap comprising a cap body defining an interior cavity and a distal discharge conduit, the cap body adapted to be seated on the distal end of the cylindrical body; anda disc-shaped bladder disposed within the interior cavity and comprising a membrane portion; and a plunger element disposed in the throughbore of the cylindrical body; wherein a distal portion of the plunger element and the bladder interact to restrict movement of the bladder outward toward the sidewall to conserve a bladder material thickness in a center of the membrane portion as the plunger element is retracted in the cylindrical body creating vacuum pressure between the plunger element and the bladder.