Avent, Inc.

Thad R Hmielak

Travis W Klyber

Gary D Aurin

Bladders and elastomeric pumps for infusion assemblies are provided. For example, a bladder may comprise a body extending over a length from a first end to an opposing second end; an outer diameter; an inner diameter; and a wall thickness. The wall thickness may gradually transition from a first wall thickness at the first end to a second wall thickness at the second end. In other embodiments, the wall thickness at a midpoint of the length is different than the wall thickness at each of the first end and the second end. An elastomeric pump may comprise an inflatable elastomeric bladder and a mandrel. The bladder includes a body extending over a bladder length from a first bladder end to an opposing second bladder end and a wall thickness, which is different at a midpoint of the bladder length than at each of the first and second bladder end.

Bladder for an infusion assembly

Mandrels and elastomeric pumps for infusion assemblies are provided. For example, a mandrel may comprise a body extending over a length from a first end to an opposing second end; an outer diameter; a bore extending within the body; an inlet port defined near the first end; and a fill port defined between the first and second ends. The inlet and fill ports are in fluid communication with the bore. The outer diameter of the mandrel at a midpoint of the length is different than the outer diameter at each of the first end and the second end. In some embodiments, the outer diameter of the mandrel gradually transitions from a first outer diameter at the first end to a second outer diameter at the second end. An elastomeric pump may include an exemplary mandrel and an inflatable elastomeric bladder disposed on the mandrel.

Mandrel for an infusion assembly

Bladders and elastomeric pumps for infusion assemblies are provided. For example, a bladder may comprise a body extending over a length from a first end to an opposing second end; an outer diameter; an inner diameter; and a wall thickness. The wall thickness may gradually transition from a first wall thickness at the first end to a second wall thickness at the second end. In other embodiments, the wall thickness at a midpoint of the length is different than the wall thickness at each of the first end and the second end. An elastomeric pump may comprise an inflatable elastomeric bladder and a mandrel. The bladder includes a body extending over a bladder length from a first bladder end to an opposing second bladder end and a wall thickness, which is different at a midpoint of the bladder length than at each of the first and second bladder ends.

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Minneapolis, MN, United States of America

Thad R Hmielak