Bladder syringe fluid delivery system
First Claim
1. A bladder syringe for a fluid delivery system, the syringe comprising:
- a cylindrical body having 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 seated on the distal end of the cylindrical body; and
a 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, the plunger element having a seal ring providing a substantially fluid tight seal between the plunger element and the cylindrical body,wherein a distal portion of the plunger element comprises a vent path having a radial passageway with an inlet at a circumferential outer surface of the plunger element distal of the seal ring and a one-way check valve allowing gas to pass through the plunger element to vent a space in the cylindrical body between the cap-bladder assembly and the plunger element during fluid delivery via distal movement of the plunger element toward the cap-bladder assembly.
3 Assignments
0 Petitions
Accused Products
Abstract
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.
-
Citations
41 Claims
-
1. A bladder syringe for a fluid delivery system, the syringe comprising:
-
a cylindrical body having 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 seated on the distal end of the cylindrical body; and a 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, the plunger element having a seal ring providing a substantially fluid tight seal between the plunger element and the cylindrical body, wherein a distal portion of the plunger element comprises a vent path having a radial passageway with an inlet at a circumferential outer surface of the plunger element distal of the seal ring and a one-way check valve allowing gas to pass through the plunger element to vent a space in the cylindrical body between the cap-bladder assembly and the plunger element during fluid delivery via distal movement of the plunger element toward the cap-bladder assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
-
23. A fluid delivery system, comprising:
-
a power fluid injector comprising an injector housing and a reciprocally operable piston element; and a bladder syringe, comprising; a cylindrical body having 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, comprising; a cap comprising a cap body defining an interior cavity and a distal discharge conduit, the cap body seated on the distal end of the cylindrical body; and a 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 and comprising a distal portion facing the cap-bladder assembly and a proximal portion adapted for connection with the piston element of the power fluid injector, the proximal portion having a seal ring providing a substantially fluid tight seal between the plunger element and the cylindrical body, wherein the distal portion of the plunger element comprises a vent path having a radial passageway with an inlet at a circumferential outer surface of the plunger element distal of the seal ring and a one-way check valve allowing gas to pass through the plunger element to vent a space in the cylindrical body between the cap-bladder assembly and the plunger element during fluid delivery via distal movement of the plunger element toward the cap-bladder assembly. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
-
Specification