초록 ▼

The present invention provides a valve assembly for allowing fluid flow in a first direction and for preventing fluid flow in a second, opposite direction including a valve housing having first and second ports opening into the housing. A flow regulator is positioned within the housing and includes

The present invention provides a valve assembly for allowing fluid flow in a first direction and for preventing fluid flow in a second, opposite direction including a valve housing having first and second ports opening into the housing. A flow regulator is positioned within the housing and includes an outer wall which is formed as a substantially cylindrical member. The regulator includes a pair of semi-circular valve lips which are oriented in converging relationship to each other to form an outlet slit at one end of the regulator. The valve lips are connected to the outer wall by a pair of concave connecting walls wherein the lips and connecting walls form a pair of cavities on either side of the outlet slit. A pair of elongated projections are located along diametrically opposing sides of the outer wall for biasing the outer wall inwardly whereby a biasing force is applied to close the lips.

대표청구항 ▼

A one-way duckbill check valve for use in a flow path for permitting relatively free flow in said flow path in a first direction from a first to a second end of said valve and for preventing flow in said path in a second opposite direction, said valve comprising: an elongated valve body having a cen

A one-way duckbill check valve for use in a flow path for permitting relatively free flow in said flow path in a first direction from a first to a second end of said valve and for preventing flow in said path in a second opposite direction, said valve comprising: an elongated valve body having a central longitudinal axis and an outer wall wherein said outer wall is substantially parallel to said axis and defines an axial and circumferential extent of said second end of said valve; a pair of valve lips positioned within the axial and circumferential extent of said second end defined by said outer wall portion of said valve body and oriented in diverging relationship to each other toward said first end of said valve; said valve body and lips being formed of an elastomeric material and wherein said lips define an elongated normally closed outlet opening of said valve at said second end; and means forming a pivot connection between said outer wall and said lips including a pair of connecting walls located on either side of said outlet opening and extending radially inwardly from said outer wall to intersect said lips along a smoothly curved edge.