Drug solution delivery device
First Claim
Patent Images
1. A drug solution delivery device comprising:
- a barrel provided at a distal end thereof with a port and opened at a proximal end thereof;
a gasket fluid-tightly and slidably arranged in a lumen of the barrel;
a cylindrical connecting member having a proximal end and a distal end to which said gasket is being releasably connected, said connecting member being a stepped hollow cylindrical member having a small-sized cylindrical distal portion with an external diameter smaller than an internal diameter of the barrel, and wherein the spring is arranged round the distal portion;
a plunger removably engaged with the proximal end of said connecting member; and
a helical spring pressed and arranged between said gasket and said connecting member to push the gasket by a restoring force thereof to deliver a drug solution.
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Accused Products
Abstract
A drug solution delivery device comprises barrel (1) provided with a port at a distal end thereof and opened at a proximal end thereof, gasket (2) fluid-tightly and slidably arranged in the barrel, cylindrical connecting member (3) having proximal end (32) and distal end (31) to which gasket (2) is releasably connected, plunger (4) removably connected to proximal end (32) of connecting member (3), and pressed helical spring (5) arranged between gasket (2) and connecting member (3).
31 Citations
19 Claims
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1. A drug solution delivery device comprising:
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a barrel provided at a distal end thereof with a port and opened at a proximal end thereof;
a gasket fluid-tightly and slidably arranged in a lumen of the barrel;
a cylindrical connecting member having a proximal end and a distal end to which said gasket is being releasably connected, said connecting member being a stepped hollow cylindrical member having a small-sized cylindrical distal portion with an external diameter smaller than an internal diameter of the barrel, and wherein the spring is arranged round the distal portion;
a plunger removably engaged with the proximal end of said connecting member; and
a helical spring pressed and arranged between said gasket and said connecting member to push the gasket by a restoring force thereof to deliver a drug solution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A drug solution delivery device comprising:
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a barrel provided at a distal end thereof with a port and opened at a proximal end thereof;
a gasket fluid-tightly and slidably arranged in a lumen of the barrel, said gasket being provided with at least one elongated flexible hook;
a cylindrical connecting member having a proximal end and a distal end to which said gasket is being releasably connected;
a plunger removably engaged with the proximal end of said connecting member; and
a helical spring pressed and arranged between said gasket and said connecting member to push the gasket by a restoring force thereof to deliver a drug solution, said spring being arranged so as to surround a shank of said hook. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification