|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||251/282 ; 251/325|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 7 인용 특허 : 3|
The present invention relates to a valve with a reciprocating piston between two oppositely-acting fluid balance chambers. The static and dynamic pressures of the fluid being dispensed creates a force in each balance chamber. However, these force vectors are of equal magnitude but opposite direction thereby resulting in no net force on the piston. This allows for the elimination of a spring compensating for fluid pressures on the piston. An internal flow passage is used within the piston so as to simplify the design and increase reliability.
A springless valve comprising: a forward fluid balance chamber; a rear fluid balance chamber; a piston reciprocating within said forward fluid balance chamber and said rear fluid balance chamber between a closed position and an open position; and a flow passage within said piston communicating between said forward fluid balance chamber and said rear fluid balance chamber whereby when the valve is reciprocated to an open position the fluid being dispensed fills and passes through both chambers thereby exerting fluid pressure induced vectors of substantial...