초록 ▼

A check valve for controlling the flow of fluid through a pipe or other means defining a passageway. The valve comprises an elastomeric valve element that permits flow of fluid through the passageway in a downstream direction while preventing the flow of fluid in the upstream direction. The valve el

A check valve for controlling the flow of fluid through a pipe or other means defining a passageway. The valve comprises an elastomeric valve element that permits flow of fluid through the passageway in a downstream direction while preventing the flow of fluid in the upstream direction. The valve element has a base that is secured to the means defining the passageway, there being an opening in the base through which fluid can flow. Flow of fluid is controlled by vanes projecting downstream from the base, each vane being flexibly connected to the base and being movable about its line of connection with the base between an open position in which the vanes permit ready flow of fluid in a forward direction, and a closed position in which the vanes make sealing engagement with each other, thus preventing upstream flow of fluid. The vanes are shaped to resist external pressures and a separate rigid supporting member is employed that has a base that is secured, with the base of the valve element to the means defining the passageway. The rigid member has a sleeve that supports the vanes adjacent their zones of pivotal connection to the base of the element against external fluid pressure. The construction permits the vanes to move from closed to open positions whenever the pressure on the upstream side of the valve element exceeds the pressure downstream of the valve element and to close when the pressure downstream of the valve element exceeds the pressure upstream of the valve element, thereby preventing flow of fluid in the upstream direction.

대표청구항 ▼

A check valve comprising: a valve element composed of flexible material, and having a base portion adapted to be secured in a passageway, and defining an opening in communication with said passageway, and a plurality of vanes projecting from said base portion in a forward flow direction, each vane b

A check valve comprising: a valve element composed of flexible material, and having a base portion adapted to be secured in a passageway, and defining an opening in communication with said passageway, and a plurality of vanes projecting from said base portion in a forward flow direction, each vane being hingedly attached to said base portion in a linear zone of reduced thickness relative to the adjacent portions of the vanes and being pivotable between an open position in which the vane extends substantially parallel to the direction of forward flow of fluid through said opening and a closed position wherein the edges of each vane maked sealing engagement with the edges of adjacent vanes, thereby substantially preventing flow of fluid through said opening in a reverse direction, whereby the vanes may move readily from open to closed position upon increase of back pressure in said passageway; each vane having a planar inner surface defining an apex at its forwardly extending end and each inner surface terminating at its end adjacent said base, in a shoulder extending outwardly from said inner surface, said shoulders lying in a common plane perpendicular to the axis of said element; and rigid means associated with said valve element and having a sleeve portion conforming to and engaging said opening through said base portion, the forwardly extending end of said sleeve portion engaging said shoulders for supporting said valve element against fluid pressures applied to the exterior of said valve element.