Check valve having adjustable lift, packing assembly, and retrofit kit for same
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0027680
(2001-12-20)
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발명자
/ 주소 |
- Wiechers, Jonathan T.
- Vonalt, Kerry G.
|
출원인 / 주소 |
|
대리인 / 주소 |
Michael Best & Friedrich LLP
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인용정보 |
피인용 횟수 :
2 인용 특허 :
10 |
초록
▼
A packing assembly, retrofit kit, and check valve with adjustable lift having a ball stop member having opposed first and second contact portions and at least two washers being provided in a stacking configuration. The stacking configuration is one selected from one in which all of the at least two
A packing assembly, retrofit kit, and check valve with adjustable lift having a ball stop member having opposed first and second contact portions and at least two washers being provided in a stacking configuration. The stacking configuration is one selected from one in which all of the at least two washers are stacked against the first contact portion of the ball stop member, one in which all of the at least two washers are stacked against the second contact portion of the ball stop member, and one in which at least one of the at least two washers is stacked against the first contact portion of the ball stop member and at least one of the at least two washers is stacked against the second contact portion of the ball stop member. Preferably, the at least two washers are of different thicknesses with, more preferably, the thicknesses of the at least two washers being multiples of each other. Most preferably, the at least two washers are a first washer and a second washer with the second washer having a thickness that is twice the thickness of the first washer.
대표청구항
▼
A packing assembly, retrofit kit, and check valve with adjustable lift having a ball stop member having opposed first and second contact portions and at least two washers being provided in a stacking configuration. The stacking configuration is one selected from one in which all of the at least two
A packing assembly, retrofit kit, and check valve with adjustable lift having a ball stop member having opposed first and second contact portions and at least two washers being provided in a stacking configuration. The stacking configuration is one selected from one in which all of the at least two washers are stacked against the first contact portion of the ball stop member, one in which all of the at least two washers are stacked against the second contact portion of the ball stop member, and one in which at least one of the at least two washers is stacked against the first contact portion of the ball stop member and at least one of the at least two washers is stacked against the second contact portion of the ball stop member. Preferably, the at least two washers are of different thicknesses with, more preferably, the thicknesses of the at least two washers being multiples of each other. Most preferably, the at least two washers are a first washer and a second washer with the second washer having a thickness that is twice the thickness of the first washer. , wherein said indicator arrangement comprises a fluid outlet pressure scale on one of said valve body and said cover, and a reference indicia on the other of said valve body and said cover, said reference indicia capable of being aligned with a demarcation of said fluid outlet pressure scale to achieve a desired fluid outlet pressure. 8. The device of claim 7, wherein said fluid outlet pressure scale comprises an index scale and said demarcations correspond to a range of fluid outlet pressures, said reference indicia comprising a view window approximately sized and shaped to display a single demarcation of said index scale. 9. The device of claim 1, wherein said cover includes at least one flexible lock tab, said flexible lock tab defining a lock surface, said valve body including a retaining surface, said lock surface being configured to engage said retaining surface to substantially fix said cover in an axial position with respect to said valve body. 10. The device of claim 9, wherein said retaining surface is an uninterrupted, annular surface defined by said retainer of said valve body. 11. A method of regulating fluid pressure comprising the steps of: preventing the flow of a fluid through a valve seat into a fluid pressure chamber within a valve body, utilizing a flexible resilient diaphragm forming a wall of said chamber when said diaphragm is not mechanically deflected; deflecting a self-restoring section of said diaphragm to introduce fluid into said fluid chamber; flexing said self-restoring section in response to pressure changes within said chamber; controlling the flow of fluid through said valve seat into said chamber with a valve element mounted to move in response to the flexing of said diaphragm section in a manner such that increasing the pressure in said chamber moves said valve element towards said valve seat and decreasing the pressure in said chamber moves said valve element away from said valve seat; allowing fluid to flow from said chamber to an outlet in said valve body; adjusting the pressure by rotating a cover having an adjuster fixed for rotation therewith relative to said valve body, said adjuster deflecting said diaphragm in a manner to control the flexing of said diaphragm section to obtain a desired outlet pressure; defining a plurality of angular positions relative to said valve body; and positioning said cover in one of said plurality of angular positions. 12. A variable pressure regulator control device comprising: a base having a wall forming a wall of a fluid pressure-sensing chamber, said base further including a fluid inlet in communication with a valve seat opening to the chamber, and a fluid outlet in communication with said chamber; a flexible, resilient diaphragm forming a wall of said chamber; a retainer clamping an annular peripheral portion of said diaphragm between the base and the retainer; a valve element mounted to a central section of said diaphragm cooperating with said valve seat in a manner such that increasing pressure in said chamber moves the valve element in a valve closing direction and decreasing the pressure in the chamber moves the valve element in a valve opening direction; an adjuster threadably connected to said retainer and having a flange which engages said diaphragm so as to deflect the diaphragm towards the valve seat, said flange defining a central section of said diaphragm which is movable in response to fluid pressure within said chamber; and a cover fixing said adjuster for rotation therewith such that rotation of said cover results in axial movement of said adjuster to adjust the deflection of said resilient diaphragm. 13. The device of claim 12, additionally comprising a catch mechanism defining a plurality of angular positions relative to said retainer, said catch mechanism being configured to position said cover in one of said plurality of angular positions. 14. The device of claim 12, additionally comprising an indicator arrang
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