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A valve whose casing has two coaxial passages and a chamber disposed between the passages and receiving a valving element movable between an open position in which the passages are free to communicate with one another and a closed position in which the passages are fully sealed from each other. The

A valve whose casing has two coaxial passages and a chamber disposed between the passages and receiving a valving element movable between an open position in which the passages are free to communicate with one another and a closed position in which the passages are fully sealed from each other. The housing is separably connected with a casing for a tubular filter through which the fluid entering via one of the passages flows on its way toward the other passage when the valving element is held in the open position. The casing can be detached from the housing only when the valving element is held in the closed position to thus prevent leakage or spillage of fluid from the housing on detachment of the casing. The valving element can include a rotary body or a membrane and a displacing member which latter is reciprocable in the chamber to move the membrane against an annular seat of the housing.

대표청구항 ▼

A valve, comprising a housing having a fluid-admitting first passage, a fluid-discharging second passage which is substantially coaxial with said first passage, and a chamber between said passages; a hollow casing provided on said housing, said casing being at least partially separable from said hou

A valve, comprising a housing having a fluid-admitting first passage, a fluid-discharging second passage which is substantially coaxial with said first passage, and a chamber between said passages; a hollow casing provided on said housing, said casing being at least partially separable from said housing; means for releasably coupling said casing to said housing, said coupling means urging said casing and said housing towards one another; a valving element in said chamber including a substantially spherical body rotatable about an axis which is substantially normal to the common axis of said passages; means for rotating said body between a first position in which said body seals said passages from one another and a second position in which said passages are free to communicate with one another and with the interior of said casing, said body having discrete first and second channels which respectively communicate with said first and second passages in the second position of said body, and said first channel resembling an elbow and having a first inlet and a first outlet which respectively open to said first passage and said casing in the second position of said body, said second channel having a second inlet and a second outlet which respectively open to said casing and said second passage in the second position of said body, and said first inlet being substantially coaxial with said second outlet, said body having a partition which separates said first outlet from said second inlet, and one of said first outlet and second inlet being surrounded by the other and being substantially centered with respect to the axis of rotation of said body, said rotating means including a shaft-like member which is substantially coaxial with said first outlet and second inlet; sealing elements disposed between said body and said housing; and means for preventing release of said coupling means in the second position of said body. A valve, comprising a housing having a fluid-admitting first passage, a fluid-discharging second passage, and a chamber between said passages; a hollow casing provided on said housing, said casing being at least partially separable from said housing; means for releasably coupling said casing to said housing, said coupling means urging said casing and said housing towards one another; a valving element in said chamber including a membrane, and a displacing member for said membrane movable relative to and with the latter; means for moving said valving element between a first position in which said element seals said passages from one another and a second position in which said passages are free to communicate with one another and with the interior of said casing, said housing having an opening which communicates with the interior of said casing and said housing defining a seat which surrounds said opening, and said membrane defining a clearance with said seat in the second position of said valving element to thereby establish communicate between one of said passages and the interior of said casing, said membrane bearing against said seat in the first position of said valving element to seal said one passage from the interior of said casing, and said membrane having an aperture which establishes communicate between the other of said passages and the interior of said casing in the second position of said valving element, said displacing member being arranged to seal said aperture in the first position of said valving element and to cooperate with said membrane in the second position of said valving element to define a channel which connects said aperture with said other passage; a diaphragm interposed between said moving means and said valving element and sealing said moving means from fluid flowing through said housing and said casing; and means for preventing release of said coupling means in the second position of said valving element.