IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0369023
(1982-04-05)
|
우선권정보 |
CH-0005939 (1980-08-06) |
국제출원번호 |
PCT/CH81/00089
(1981-08-06)
|
§371/§102 date |
19820405
(19820805)
|
국제공개번호 |
WO-8200450
(1982-02-18)
|
발명자
/ 주소 |
- Werding Winfried J. (77
- Av. du Gnral Guisan 1009 Pully CHX)
|
인용정보 |
피인용 횟수 :
16 인용 특허 :
0 |
초록
▼
By the displacement, depending on the pressure change in the container (22), of a piston (8) in order to open or obturate a bore (9) in the product conduit (7), the amount of product flowing per unit of time through the opened valve (1) is maintained constant even when the pressure in the container
By the displacement, depending on the pressure change in the container (22), of a piston (8) in order to open or obturate a bore (9) in the product conduit (7), the amount of product flowing per unit of time through the opened valve (1) is maintained constant even when the pressure in the container (22) diminishes. The piston (8) is so displaced by the pressure prevailing in the container (22) via a diaphragm (12) against a restoring force (21) that the bore (9) defines, at the time of the highest pressure prevailing in the container (22), a smallest predetermined opening for the product flow. By an adequate choice of the shape of the bore (9), the thrust of the product flowing through the opened valve (1) can thereby be maintained constant, which leads to a constant quality of atomization of the product (23) through a spray nozzle.
대표청구항
▼
Thrust control means adapted for being mounted in a pressurized container from the interior of which product is to be expelled along a flowpath extending through a riser tube and a discharge valve, which thrust control means enable maintaining the amount of product being expelled from the container
Thrust control means adapted for being mounted in a pressurized container from the interior of which product is to be expelled along a flowpath extending through a riser tube and a discharge valve, which thrust control means enable maintaining the amount of product being expelled from the container per unit of time at least substantially constant during the entire emptying time of said container, notwithstanding the reduction of internal pressure occuring during the progressive emptying of the container, said thrust control means comprising a casing, a product channel in said casing, having a channel axis and two open ends one of which is connectable to said riser tube and the other is connectable to said discharge valve, a transverse bore having a bore axis intersecting said axis of said product channel, thereby providing two intermediate openings in said product channel located in the wall of said transverse bore, a piston having two ends and a circumferential surface therebetween and being lodged in said transverse bore for axial displacement therein, said piston having a piston bore with two piston bore openings in said circumferential surface of said piston, and with a piston bore axis extending at least substantially parallel with said channel axis, a first diaphragm having two large sides one of which two sides is in working engagement with one of said two piston ends, and resetting means having two sides one of which sides faces toward said diaphragm; said resetting means holding said piston, in a fully open position in which said piston bore fully registers with said product channel so as to afford a maximum common cross sectional area of said product channel intermediate openings with said piston bore openings, and when said diaphragm is undeformed, and, when said thrust control means is mounted in a container the interior of which is pressurized, one large side of said diaphragm being adapted to be exposed to the internal pressure prevailing in the interior of said container, said diaphragm being deformed by such internal pressure, against the bias of said resetting means, whenever the internal container pressure exceeds a determined upper value, and thereby axially displacing said piston away from said fully open position and reducing the size of said common cross sectional area proportionately with the internal pressure prevailing in said container to which pressure said other diaphragm side is exposed, while, proportionately with the reduction of said internal pressure during gradual emptying of the container, said resetting means will move said piston axially in said transverse bore toward said fully open position, thereby gradually increasing said common cross sectional area as the internal container pressure decreases, the dimensions of said common cross sectional area at fully open position and the deformability of said diaphragm with changing pressure being so chosen that the size of the internal container pressure, prevailing at a given time, multiplied by the size of the respective common cross sectional area at that pressure affords an at least substantially constant value throughout all of the operations required for emptying the container of product.
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