Automatic pressure reducing valve
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0742777
(2009-02-27)
|
등록번호 |
US-8387654
(2013-03-05)
|
우선권정보 |
KR-10-2008-0018402 (2008-02-28) |
국제출원번호 |
PCT/KR2009/000940
(2009-02-27)
|
§371/§102 date |
20100513
(20100513)
|
국제공개번호 |
WO2009/107999
(2009-09-03)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
5 |
초록
▼
Disclosed is an automatic pressure reducing valve. A body includes a hollow portion, an inlet portion and an outlet portion for flow of a fluid and has an internal space. A cylinder is installed inside the hollow portion and has at least two holes formed in its wall. An piston is movable along the i
Disclosed is an automatic pressure reducing valve. A body includes a hollow portion, an inlet portion and an outlet portion for flow of a fluid and has an internal space. A cylinder is installed inside the hollow portion and has at least two holes formed in its wall. An piston is movable along the inner side of the cylinder and adjusts opening rate of the holes according to a fluid pressure difference between an inlet portion and an outlet portion.
대표청구항
▼
1. An automatic pressure reducing valve, comprising: a body having a hollow portion, an inlet portion and an outlet portion, the inlet and the outlet portions are respectively disposed on opposing ends of the hollow portion and are in fluid communication each to the other, and fluid in the inlet por
1. An automatic pressure reducing valve, comprising: a body having a hollow portion, an inlet portion and an outlet portion, the inlet and the outlet portions are respectively disposed on opposing ends of the hollow portion and are in fluid communication each to the other, and fluid in the inlet portion flows into the hollow portion and flows out of the outlet portion with reduced pressure;a cylinder including a first portion having at least one opening defining a hole for allowing passage of the fluid in the inlet portion of the body into the hollow portion of the body and a second portion having an inside diameter larger than an inside diameter of the first portion, and the cylinder having a T shaped profile with openly communicated ends of the first and the second portions, wherein a lower end of the first portion is connected to an under wall of the hollow portion of the body or an upper side of the inlet portion of the body, an upper end of the second portion is displaced from the outlet portion of the body and each outer side of the first and the second portion is displaced from a wall of the hollow portion of the body;a piston having a T-shaped profile with opposing top end and lower end, the piston slidingly disposed within an inner space of the cylinder, the piston being displaceable responsive to pressure differential between the inlet portion and the outlet portion, whereby fluid from the inlet portion flows through the opening into the hollow portion and out of the outlet portion when the piston is displaced responsive to said pressure differential created by a first pressure acting on said first end and a second pressure acting on said top end, said piston having a third portion with an outside diameter smaller than the inside diameter of the first portion of the cylinder and a fourth portion with an outside diameter smaller than the inside diameter of the second portion of the cylinder. 2. The automatic pressure reducing valve of claim 1, wherein a ratio of a fluid pressure in the hollow portion of the body to a fluid pressure in the inlet portion of the body depends on a square of a ratio of an outside diameter of the third portion of the piston to an outside diameter of the fourth portion of the piston. 3. The automatic pressure reducing valve of claim 1, further comprising, two sealing members to seal a gap between the cylinder and the piston, one sealing member being disposed between a partial portion over the hole of the first portion and the third portion of the piston and the other sealing member being disposed between the second portion of the cylinder and the fourth portion of the piston. 4. The automatic pressure reducing valve of claim 1, further comprising, a third sealing member disposed between an upper side of the inlet portion or an inner side of the under wall of the hollow portion and a brim side of a lower end of the piston to prevent fluid in the inlet portion of the body from leaking into the hole of the cylinder. 5. The automatic pressure reducing valve of claim 1, further comprising, one or more stoppers which are coupled with the piston and restrict movement of the piston within a predetermined distance. 6. The automatic pressure reducing valve of claim 3, further comprising, a pipe or a tube shaped ventilation member through which the gap sealed by the two sealing members disposed between the cylinder and the piston communicates with atmosphere outside the body, wherein one end of the pipe or the tube is connected to a wall of the cylinder and the other end is connected to a wall of the hollow or the outlet portion of the body. 7. The automatic pressure reducing valve of claim 1, further comprising, a drain pipe having one end connected to a lower sidewall or an under wall of the hollow portion and the other end openly communicated to discharge a fluid in the hollow portion and a pipe connected to the outlet portion outside the body by opening of a flow control valve. 8. The automatic pressure reducing valve of claim 1, further comprising, a first automatic relief valve which is installed in a by-pass pipe for a use of a first relief pipe of which one end is connected to a drain pipe between the hollow portion and a flow control valve in the drain pipe and the other end to a drain pipe between the flow control valve and the end of the drain pipe of which is installed in a first relief pipe of which one end is directly connected to a wall of the hollow portion or the outlet portion of the body and the other end is opened or connected to a drain pipe between the flow control valve and the end of the drain pipe. 9. The automatic pressure reducing valve of claim 1, further comprising, a second automatic relief valve which is installed in a second relief pipe of which one end is connected to a wall of the inlet portion and the other end is opened or connected to a drain pipe between the flow control valve and the end of the drain pipe. 10. The automatic pressure reducing valve of claim 1, further comprising, an electrically switching member which is attached to an outside of a wall of the hollow portion or the outlet portion and operated between “on” or “off” by a structure, which is coupled with the piston and movable together with movement of the piston, and which detects an occurrence of flow of fluid.
이 특허에 인용된 특허 (5)
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de Launay Paul (119 W. Farrel Lafayette LA 70508), Check valve.
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Koelzer,Robert L., Pressure reducing valve.
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Ezekoye L. Ike (Wilkinsburg PA), Pressure relief valve.
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Alderson Loren L. (Nickerson KS) Truesdell Delbert E. (Conover OH), Priority flow valve.
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Paptzun George J. (North Wales PA), Recirculation valve.
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