IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0706119
(2000-11-03)
|
우선권정보 |
IT-0001093 (1999-12-14); IT-0000975 (1999-11-12); IT-0000571 (2000-06-13) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
10 인용 특허 :
2 |
초록
▼
A check valve and, in particular, an anti-siphon valve, for medical infusion lines and the like, including an axial upstream passageway and an axial downstream passageway, staggered and parallel with respect to each other, and a diaphragm of elastic material cooperating with an annular valve seat fo
A check valve and, in particular, an anti-siphon valve, for medical infusion lines and the like, including an axial upstream passageway and an axial downstream passageway, staggered and parallel with respect to each other, and a diaphragm of elastic material cooperating with an annular valve seat for normally keeping communication between these passageways closed. The diaphragm is composed of the end wall of a cup-shaped element on which a plunger rests coaxially, the plunger being slidable between a retracted inoperative position and an advanced operative position. Valve opening occurs following flexion of the diaphragm, which can be spontaneous due to a predetermined fluid pressure developing in the upstream passageway, or positively operated via the plunger (9).
대표청구항
▼
A check valve and, in particular, an anti-siphon valve, for medical infusion lines and the like, including an axial upstream passageway and an axial downstream passageway, staggered and parallel with respect to each other, and a diaphragm of elastic material cooperating with an annular valve seat fo
A check valve and, in particular, an anti-siphon valve, for medical infusion lines and the like, including an axial upstream passageway and an axial downstream passageway, staggered and parallel with respect to each other, and a diaphragm of elastic material cooperating with an annular valve seat for normally keeping communication between these passageways closed. The diaphragm is composed of the end wall of a cup-shaped element on which a plunger rests coaxially, the plunger being slidable between a retracted inoperative position and an advanced operative position. Valve opening occurs following flexion of the diaphragm, which can be spontaneous due to a predetermined fluid pressure developing in the upstream passageway, or positively operated via the plunger (9). gh said needle relative to said barrel and (c) to retain the shield in a second extended position and thereby engage means on said barrel so as to a cause said means to penetrate said barrel and thereby render said syringe inoperative. 3. The improvement of claim 1, wherein said resealable septum comprises a composite with includes a layer of an elastomeric material and a layer of a fluid absorbing material. 4. A method for prevention of inadvertent fluid discharge from a syringe and the containment thereof, if and when inadvertently discharged, within a leak-proof needle guard disposed on the end of the syringe, said method comprising: A. providing a slidable, barrel mounted, reciprocating shield in the form of a fluid tight container for isolation of a syringe needle mounted on a syringe, said shield being characterized as having (1) an open end which includes an essentially fluid tight seal for mating engagement with a barrel of a syringe, said seal being further characterized as permitting both reciprocating movement, upon retraction of said shield relative to along said barrel of said syringe, and sealing of said needle and fluid within said shield, upon re-deployment of said shield beyond the end of said needle, and (2) a closed end having a resealable permanent elastomeric seal integral with said shield and disposed in-line with said syringe needle, whereby upon relative axial movement of said shield along said barrel, said needle penetrates said septum and, upon extension of said shield relative to said barrel, reseals said needle within said shield, whereby, and fluids that are disposed within said barrel and inadvertently discharged through said needle are retained within said shield.
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