IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0475747
(2002-04-29)
|
우선권정보 |
IT-0000404 (2001-04-27) |
국제출원번호 |
PCT/IT02/00275
(2004-05-03)
|
§371/§102 date |
20040503
(20040503)
|
국제공개번호 |
WO02/08858
(2002-11-07)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
15 인용 특허 :
2 |
초록
▼
An ON/OFF valve (1,1′,1″) that has an outer body (3) defining a fluid flow cavity (2) divided by an intermediate surface (8, 21) into a first and a second chamber (2a, 2b) communicating with each other via an opening section (6, 28) in the intermediate surface (8, 21). A flexible shutter (7) has on
An ON/OFF valve (1,1′,1″) that has an outer body (3) defining a fluid flow cavity (2) divided by an intermediate surface (8, 21) into a first and a second chamber (2a, 2b) communicating with each other via an opening section (6, 28) in the intermediate surface (8, 21). A flexible shutter (7) has on the side facing the first chamber (2a), a membrane portion (17) that cooperates elastically, by virtue of a fluid pressure, with the intermediate surface (8, 21) and with the opening section (6, 28) to separate the first and second chamber (2a, 2b) hermetica1ly. Fluid leakage generating members (20, 27) are located between the membrane portion (17) of the shutter (7) and the opening section (6, 28), and are active when the pressure in the first chamber (2a) exceeds the pressure in the second chamber (2b) by an amount equal to or less than a threshold value (P) other than zero.
대표청구항
▼
1. An ON/OFF valve (1, 1′, 1″) comprising:an outer body (3) defining a fluid flow cavity (2) divided by an intermediate surface (8, 21) into a first and a second chamber (2a, 2b) communicating with each other via an opening section (6, 28) in the intermediate surface (8, 21); and a flexible shutter
1. An ON/OFF valve (1, 1′, 1″) comprising:an outer body (3) defining a fluid flow cavity (2) divided by an intermediate surface (8, 21) into a first and a second chamber (2a, 2b) communicating with each other via an opening section (6, 28) in the intermediate surface (8, 21); and a flexible shutter (7) having, on the side facing said first chamber (2a), a membrane portion (17) cooperating elastically, by virtue of a fluid pressure, with said intermediate surface (8, 21) and with said opening section (6, 28) to separate said first and said second chamber (2a, 2b) hermetically; characterized by comprising fluid leakage generating means (20, 27) located between said membrane portion (17) of said shutter (7) and said opening section (6, 28), and which are active when the pressure in said first chamber (2a) exceeds the pressure in said second chamber (2b) by an amount equal to or less than a threshold value (P) other than zero, said fluid leakage generating means including a number of grooves (20) formed in said intermediate surface (8) that are equally spaced about a central axis (A) of said intermediate surface (8) and extend radially with respect to said axis (A), said grooves (20) communicating with said opening section (6), and said threshold value (P) being a function of the geometry of said grooves (20). 2. A valve as claimed in claim 1, characterized in that said shutter (7) comprises a stem (15) extending inside said second chamber (2b); and in that said membrane portion (17) projects radially from one end of said stem (15).3. A valve as claimed in claim 1, characterized in that said intermediate surface (8, 21) is annular, and centrally defines said opening section (6, 28).4. A valve as claimed in claim 1, characterized in that said groove (20) extends from a radially-outer peripheral edge of said opening section (6), and projects radially with respect to said membrane portion (17).5. A valve as claimed in claim 1, characterized in that said groove (20) has an open U-shaped cross section.6. A valve as claimed in claim 1, characterized in that said opening section (6) comprises two substantially half-moon-shaped openings (10, 11) defining, on opposite sides, a seating portion (12) for said stem (15) of said shutter (7).7. A valve as claimed in claim 1, characterized by comprising a disk-shaped base member (5) housed hermetically in said cavity (2), and which defines said intermediate surface (8) on the side facing said first chamber (2a); said stern (15) being fitted coaxially through said base member (5).8. A valve as claimed in claim 1, characterized in that said membrane portion (17) of said shutter (7) is circular-dome-shaped and convex on the side facing said first chamber (2a).
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