Normally closed aspiration valve
First Claim
Patent Images
1. A normally closed aspiration valve device comprising:
- a first body element having a first passageway therethrough and a shoulder disposed in an inner wall thereof;
a second body element having a second passageway therethrough, a support member and a means for syringe attachment, said second body element attached to said first body element; and
a flexible valve disc having a top surface, said disc mounted between said first and second body elements with said disc partially flexed, said first and second body elements and said disc forming a one-way valve, wherein said top surface of sale disc forms an annular seal with said shoulder preventing flow of a fluid between said first and second passageways, and wherein a fluid pressure drop in said second passageway increases the relative pressure in said first passageway such that said disc is further flexed away from said shoulder and allows fluid from said first passageway into said second passageway.
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Abstract
A valve having two elements each with a respective passageway, with one of the elements having a support and the other element having a shoulder, and a disc mounted between the elements and partially flexed over the support to form a seal on the shoulder preventing flow between the passageways until a relative pressure differential between the passageways fully flexes the disc over the support to allow flow between the passageways.
84 Citations
17 Claims
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1. A normally closed aspiration valve device comprising:
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a first body element having a first passageway therethrough and a shoulder disposed in an inner wall thereof; a second body element having a second passageway therethrough, a support member and a means for syringe attachment, said second body element attached to said first body element; and a flexible valve disc having a top surface, said disc mounted between said first and second body elements with said disc partially flexed, said first and second body elements and said disc forming a one-way valve, wherein said top surface of sale disc forms an annular seal with said shoulder preventing flow of a fluid between said first and second passageways, and wherein a fluid pressure drop in said second passageway increases the relative pressure in said first passageway such that said disc is further flexed away from said shoulder and allows fluid from said first passageway into said second passageway. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A valve device comprising:
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a first body element having a first passageway therethrough and a shoulder disposed in an inner wall thereof; a second body element having a second passageway therethrough, a support member and a means for syringe attachment, said second body element attached to said first body element; and a flexible valve disc having a top surface, said disc mounted between said first and second body elements with said disc partially flexed, said first and second body elements and said disc forming a one-way valve, wherein said top surface of said disc forms an annular seal with said shoulder preventing flow of a fluid between said first and second passageways, and wherein a fluid pressure drop in said second passageway increases the relative pressure in said first passageway such that said disc is further flexed away from said shoulder and allows fluid from said first passageway into said second passageway, and wherein said first body element has a traverse bar having a lower surface which presses said disc against said support member. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A system for aspirating fluids from containers, comprising:
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a. at least one fluid container; b. at least one piercing spike; c. at least one valve device comprising a first body element having a first passageway therethrough and a shoulder disposed in an inner wall thereof;
a second body element having a second passageway therethrough, a support member and a means for syringe attachment, said second body element second body element attached to said first body element; and
a flexible valve disc having a top surface, said disc mounted between said first and second body elements with said disc partially flexed, said first and second body elements and said disc forming a one-way valve, wherein said top surface of said disc forms an annular seal with said shoulder preventing flow of a fluid between said first and second passageways; andd. at least one needlefree syringe attached to said valve device at said means for syringe attachment for creating a fluid pressure drop in said second passageway which increases the relative pressure in said first passageway such that said disc is further flexed away from said shoulder end allows fluid from said container to flow through said first and second passageways into said needlefree syringe. - View Dependent Claims (17)
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Specification