Autoflush syringe
First Claim
1. A two-chambered syringe comprising:
- a. an outer barrel with an open end;
b. an inner barrel/first piston movable in and out of said outer barrel, said inner barrel/first piston having a proximal open end and a distal open end;
c. a second piston movable in and out of said inner barrel/first piston;
d. a latching mechanism for locking and unlocking said second piston relative to said inner barrel/first piston, wherein said latching mechanism defines a path of movement for said second piston relative to said inner barrel/first piston.
4 Assignments
0 Petitions
Accused Products
Abstract
A two-chambered, sequentially injectable syringe is disclosed. The syringe has two concentric barrels, substantially cylindrical in shape. The outer barrel has an open end adapted for receiving an inner barrel/first piston. The inner barrel/first piston contains a flushing liquid. The syringe has a second piston slidably movable in the inner barrel and a latching mechanism that can alternate between a locked configuration and an unlocked configuration. In the locked configuration, the latching mechanism prevents the second piston from substantially all longitudinal movement relative to the inner barrel. In the unlocked configuration, the latching mechanism permits longitudinal motion of the second piston within the inner barrel.
125 Citations
23 Claims
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1. A two-chambered syringe comprising:
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a. an outer barrel with an open end;
b. an inner barrel/first piston movable in and out of said outer barrel, said inner barrel/first piston having a proximal open end and a distal open end;
c. a second piston movable in and out of said inner barrel/first piston;
d. a latching mechanism for locking and unlocking said second piston relative to said inner barrel/first piston, wherein said latching mechanism defines a path of movement for said second piston relative to said inner barrel/first piston. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of using a two-chambered syringe comprising:
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a. providing a two-chambered syringe comprising;
i. an open-ended outer barrel;
ii. an open-ended inner barrel/first piston movable in said outer barrel;
iii. a second piston moveable in and out of said inner barrel/first piston;
iv. a conduit providing communication between said proximal open end of said inner barrel/first piston and said outer barrel;
v. a first liquid inside said inner barrel/first piston; and
vi. a latching mechanism for locking and unlocking said inner barrel/first piston relative to said second piston;
b. drawing a second liquid into said open-ended outer barrel, such that said second liquid and said first liquid do not substantially mix; and
c. slidably moving said open-ended inner barrel/first piston to expel said second liquid from said open-ended outer barrel. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A two-chambered syringe comprising:
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a. an outer barrel having an open end;
b. an inner barrel/first piston movable in and out of said outer barrel, and having a proximal open end and a distal open end;
c. a second piston slidably movable into said inner barrel/first piston;
d. means for locking and unlocking said inner barrel/first piston to said second piston;
e. a conduit providing communication between said proximal open end of said inner barrel/first piston and said open end of said outer barrel; and
f. a first liquid inside said inner barrel/first piston wherein said first liquid extends through said proximal open end of said inner barrel/first piston, and only partially into said conduit. - View Dependent Claims (22, 23)
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Specification