US 11,717,614 B2
Syringe with rolling diaphragm
Dave Berry, Kittanning, PA (US); Kevin P. Cowan, Allison Park, PA (US); Martin J. Gibler, West Chester, OH (US); and Michael A. Spohn, Fenelton, PA (US)
Assigned to BAYER HEALTHCARE LLC, Whippany, NJ (US)
Filed by BAYER HEALTHCARE LLC, Whippany, NJ (US)
Filed on Mar. 9, 2020, as Appl. No. 16/812,912.
Application 16/812,912 is a continuation of application No. 15/305,285, granted, now 10,583,256, previously published as PCT/US2015/027582, filed on Apr. 24, 2015.
Claims priority of provisional application 61/987,086, filed on May 1, 2014.
Claims priority of provisional application 61/984,386, filed on Apr. 25, 2014.
Prior Publication US 2020/0222634 A1, Jul. 16, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 5/315 (2006.01); A61M 5/24 (2006.01); A61M 5/145 (2006.01)
CPC A61M 5/31513 (2013.01) [A61M 5/145 (2013.01); A61M 5/14586 (2013.01); A61M 5/2425 (2013.01); A61M 5/14546 (2013.01); A61M 5/14566 (2013.01); A61M 5/14593 (2013.01); A61M 5/31515 (2013.01); A61M 2005/14513 (2013.01); A61M 2005/14553 (2013.01); A61M 2205/36 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A syringe for a fluid delivery system, the syringe comprising:
a pressure jacket having a distal end, a proximal end, and a throughbore extending between the distal end and the proximal end; and
a rolling diaphragm disposed within the throughbore of the pressure jacket, the rolling diaphragm having a proximal end having a concave end wall shaped for engagement with a plunger, a distal end received at the distal end of the pressure jacket, the distal end of the rolling diaphragm having a discharge neck, and a sidewall extending between the proximal end and the distal end of the rolling diaphragm along a longitudinal axis, at least one of the end wall and at least a portion of the sidewall having a non-uniform thickness,
wherein at least a portion of the sidewall of the rolling diaphragm is flexible and rolls upon itself 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 and such that the outer surface of the sidewall unrolls as the folding region is unfolded in a radially outward direction as the plunger is retracted from the proximal end to the distal end of the rolling diaphragm,
wherein the concave end wall of the rolling diaphragm has a plunger engagement portion that protrudes proximally from the concave end wall such that the plunger engagement portion is at least partially recessed within a cavity defined by the concave end wall at least in an unrolled state or a rolled state of the rolling diaphragm and prior to engagement with the plunger, and
wherein the concave end wall has a radiused folding edge that transitions into a distally extending ramp having a continuously increasing thickness.