Syringe with rolling diaphragm

US10583256B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Dave Berry · Kittanning, US
• Barry L. Tucker · Verona, US
• Edward J. Rhinehart · Monroeville, US
• Gerald W. Callan · Oil City, US
• Arthur E. Uber, III · Pittsburgh, US
• Kevin P. Cowan · Washington, US
• Raymond C. Hoffman · Gibsonia, US
• Benjamin Thomas Krupp · Cincinnati, US
• Martin J. Gibler · Sharonville, US
• Michael A. Spohn · Butler, US

Key dates

• Filing date: Apr 24, 2015
• Grant date: Mar 10, 2020
• Expiry date: Aug 1, 2036

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2205/36
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A syringe for a fluid delivery system includes a pressure jacket having a distal end, a proximal end, and a throughbore therebetween. The syringe further includes a rolling diaphragm having a proximal end with an end wall for engaging a plunger, a distal end received within the throughbore of the pressure jacket. A sidewall extends between the proximal end and the distal end of the rolling diaphragm along a longitudinal axis. At least a portion of one of the sidewall and the end wall has non-uniform thickness. At least a portion of the sidewall is flexible and rolls upon itself when acted upon by the plunger such that an outer surface of the sidewall at a folding region is folded in a radially inward direction as the plunger is advanced from the proximal end to the distal end of the rolling diaphragm.