IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0516458
(2003-06-30)
|
등록번호 |
US-7494075
(2009-02-24)
|
우선권정보 |
DE-102 29 185(2002-06-28) |
국제출원번호 |
PCT/EP03/006917
(2003-06-30)
|
§371/§102 date |
20041217
(20041217)
|
국제공개번호 |
WO04/002853
(2004-01-08)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
13 인용 특허 :
8 |
초록
▼
A pressure regulating valve reduces the increased internal pressure in an aerosol spray can, filled with compressed gas, to a working pressure level for a spray valve (12). A regulating piston (52) is kept in equilibrium by a restoring force, and a sealing point (66, 68) is provided, which is closed
A pressure regulating valve reduces the increased internal pressure in an aerosol spray can, filled with compressed gas, to a working pressure level for a spray valve (12). A regulating piston (52) is kept in equilibrium by a restoring force, and a sealing point (66, 68) is provided, which is closed at a pressure in the pressure regulation chamber (84) that is above the regulated pressure level. To prevent the precision of regulation from being adulterated by the decreasing internal pressure of the can as its contents are progressively withdrawn, a sealing means (86, 66; 67) is proposed, which seals off one free end of the piston (52, 74) from the internal pressure of the can and the regulated pressure. The variable internal pressure of the can is therefore no longer able to act on any axial face of the piston (52), and despite what may be a smaller piston face area, the precision of regulation is improved.
대표청구항
▼
The invention claimed is: 1. A pressure regulating valve for use in an aerosol spray can having a spray valve, in which the pressure regulating valve is used to lower a pressure level prevailing in a compressed-gas-filled interior of the can to a regulation pressure level at which the spray valve i
The invention claimed is: 1. A pressure regulating valve for use in an aerosol spray can having a spray valve, in which the pressure regulating valve is used to lower a pressure level prevailing in a compressed-gas-filled interior of the can to a regulation pressure level at which the spray valve is desired to operate, the pressure regulating valve comprising: a housing having a pressure regulation chamber which in use communicates with the spray valve, a regulating piston which is guided for movement in said housing and which in use is kept in equilibrium between a regulated pressure acting on a pressure end of said piston located in said pressure regulation chamber and a restoring force, said piston also having a free end remote from the pressure end, a sealing point provided between said regulating piston and said housing which is closed when the regulating pressure in said pressure regulation chamber is above the regulation pressure level of the spray valve, and a sealing means which is used for sealing off said free end of said piston at all times a) from the pressure level prevailing in the can interior and b) from the regulated pressure in said pressure regulation chamber, so that in use the pressure acting on said free end of the piston is at all times independent of the pressure level prevailing in the can. 2. The pressure regulating valve of claim 1, characterized in that the sealing point is provided in a middle region of the regulating piston. 3. The pressure regulating valve of claim 2, characterized in that the pressure regulation chamber communicates with the sealing point via openings in the piston. 4. The pressure regulating valve of claim 2, characterized in that: the housing is cylindrical, the piston includes a piston shaft which is sealed with the cylindrical housing on both sides of the sealing point, and a first seal, on one side of the sealing point, is provided as part of the sealing means on the free end of the piston. 5. The pressure regulating valve of claim 4, characterized in that the sealing of the piston shaft with the cylindrical housing is effected with O-rings, which are disposed in grooves. 6. The pressure regulating valve of claim 5, characterized in that the grooves are wider than the respective O-ring. 7. The pressure regulating valve of claim 6, characterized in that the width of the grooves is selected such that the O-ring, in an adjusting region of the piston, rolls essentially without friction on the bottom of the groove and the opposite sealing face of the outsides of the piston and insides of the cylinder. 8. The pressure regulating valve of claim 1, characterized in that the restoring force is built up by means of a restoring spring which is disposed in a closed chamber of the housing that is sealed off by the sealing means. 9. The pressure regulating valve of claim 8, characterized in that a spacer for adjusting the spring prestressing force is disposed in the closed chamber. 10. The pressure regulating valve of claim 1, characterized in that between the piston and the housing, at least in one direction of motion, an axial stop is provided for limiting the mobility of the piston. 11. The pressure regulating valve of claim 1, characterized in that the piston diameter, viewed from the sealing point, is embodied differently in the two axial directions. 12. The pressure regulating valve of claim 1, characterized in that the region of the sealing point, an annular disk-like sealing element or an O-ring like sealing element is provided, which is fixed on the piston or the housing and cooperates sealingly with a shoulder or a face on the housing or on the piston, if the pressure in the pressure regulation chamber exceeds the regulated pressure level. 13. The pressure regulating valve of claim 11, characterized in that the cylindrical housing has two parts with optionally different inside diameters adapted to the piston diameters, and between them the sealing element is fixed. 14. The pressure regulating valve of claim 13, characterized in that in the region of contact with the sealing element and at least one of the two parts that fix the sealing element, a narrow annular ridge or protrusion for attaining a linear sealing action is provided. 15. The pressure regulating valve of claim 11, characterized in that the O-ring-or annular disk-like sealing element protrudes radially inward into an annular groove provided in a middle region of the piston. 16. The pressure regulating valve of claim 1, characterized in that the housing includes an inner housing part, for receiving the free end of the piston, and a cuplike outer housing part surrounds the inner housing part, said outer hosuing part being used for forming a connection between the can interior and the sealing point. 17. The pressure regulating valve of claim 1, characterized in that a neck is integrally formed onto or attached to the housing for use in connecting the sealing point to the can interior. 18. The pressure regulating valve of claim 1, characterized in that it has a neck which is connected in use to a neck of a spray valve. 19. The pressure regulating valve of claim 1, characterized in that on an outlet side thereof leading in use to the spray valve, an overpressure valve is provided, said overpressure valve opening above a predetermined limit pressure for supplying gas as during manufacture of the can to the can interior. 20. The pressure regulating valve of claim 1, characterized in that a throttle restriction is provided between the pressure regulation chamber and where the spray valve will be connected in use. 21. The pressure regulating valve of claim 1, characterized in that the pressure regulation chamber is located in use on the side of the piston remote from the spray valve, and a connecting conduit that bypasses the piston laterally connects the pressure regulation chamber with the spray valve. 22. The pressure regulating valve of claim 1, characterized in that further includes a spray valve. 23. The pressure regulating valve of claim 2, characterized in that there is an annular groove at the middle region of the regulating piston.
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