Patent ID: 11931544
Assignee: AVENT, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A bolus delivery device comprising:
a housing;
a reservoir disposed within the housing for receipt of a volume of a fluid, the reservoir defined by an activation dome and a reservoir seat, the reservoir having a fluid pressure that varies as the volume of the fluid varies within the reservoir;
a piston axially disposed within the reservoir and extending through an orifice in the reservoir seat, the piston having a proximal end and a distal end;
a biasing member disposed around the distal end of the piston;
a seal member disposed around the distal end of the piston and against a distal side of the orifice in the reservoir seat;
an expandable bladder disposed in the housing, the expandable bladder in fluid communication with the reservoir for receipt of the fluid from the reservoir;
an actuator for initiating a flow of the fluid from the reservoir to the expandable bladder;
an inlet conduit in fluid communication with the reservoir for providing the fluid to the reservoir; and
an outlet conduit in fluid communication with the expandable bladder for providing the fluid to a patient,
wherein the biasing member has a biasing force that overcomes the fluid pressure of the reservoir when the reservoir is substantially empty to push the seal member against the distal side of the reservoir seat.