Syringe with rolling diaphragm
First Claim
1. A rolling diaphragm for receiving a medical fluid therein, the rolling diaphragm comprising:
- a proximal end comprising a concave end wall shaped for engagement with a plunger, a distal end having a discharge neck, and a sidewall extending between the proximal end and the distal end along a longitudinal axis, wherein at least a portion of at least one of the sidewall and the concave end wall has a non-uniform thickness,wherein at least a portion of the sidewall is flexible such that the sidewall 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,wherein 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 distal end to the proximal end, andwherein the concave end wall 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.
1 Assignment
0 Petitions
Accused Products
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.
134 Citations
20 Claims
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1. A rolling diaphragm for receiving a medical fluid therein, the rolling diaphragm comprising:
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a proximal end comprising a concave end wall shaped for engagement with a plunger, a distal end having a discharge neck, and a sidewall extending between the proximal end and the distal end along a longitudinal axis, wherein at least a portion of at least one of the sidewall and the concave end wall has a non-uniform thickness, wherein at least a portion of the sidewall is flexible such that the sidewall 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, wherein 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 distal end to the proximal end, and wherein the concave end wall 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A syringe for a fluid delivery system, the syringe comprising:
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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, wherein the rolling diaphragm comprises a proximal end having a concave end wall shaped for engagement with a plunger, a distal end, a discharge neck at the distal end of the rolling diaphragm, and a sidewall extending between the proximal end and the distal end of the rolling diaphragm along a longitudinal axis, wherein at least one of the concave end wall and at least a portion of the sidewall has 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 distal end to the proximal end of the rolling diaphragm, and wherein the concave end wall 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. - View Dependent Claims (17, 18, 19)
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20. A fluid delivery system, comprising:
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a fluid injector comprising at least one reciprocally operable piston; a plunger operably connectable to the at least one piston; a pressure jacket having a distal end, a proximal end, and a throughbore extending between the distal end and the proximal end, wherein the pressure jacket is operably connectable to the fluid injector; and a rolling diaphragm disposed within a throughbore of the pressure jacket, wherein the rolling diaphragm comprises a proximal end comprising a concave end wall shaped for engagement with the plunger, a distal end, a discharge neck at the distal end of the rolling diaphragm, and a sidewall extending between the proximal end and the distal end of the rolling diaphragm along a longitudinal axis, wherein at least a portion of at least one of the sidewall and the concave end wall has 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 by the piston 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 by the piston from the distal end to the proximal end of the rolling diaphragm, and wherein the concave end wall 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.
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Specification