초록 ▼

A backflow check valve is disclosed. The valve comprises a housing, a biasable disk within the housing and a valve seat carried by the housing against which the disk is urgeable. The housing has a fluid inlet and a fluid outlet. The disk is preferably disposed transverse to a preselected direction o

A backflow check valve is disclosed. The valve comprises a housing, a biasable disk within the housing and a valve seat carried by the housing against which the disk is urgeable. The housing has a fluid inlet and a fluid outlet. The disk is preferably disposed transverse to a preselected direction of fluid flow through the housing for controlling fluid flow therethrough. The disk is urgeable against the seat for preventing fluid from flowing contrary to the preselected direction of flow. The housing includes means in the housing for biasly engaging therein opposite sides of the disk. The housing further includes means in the housing for biasly engaging the disk along a first pair of spaced opposite end portions and for biasly engaging the disk along a second pair of spaced opposite end portions. The housing preferably includes a blade carried within the housing; and the seat preferably describes a curved surface having a depression into which the blade is insertable for biasly engaging, between the seat and the blade, opposite sides of the first pair of disk end portions.

대표청구항 ▼

A backflow check valve comprising: a housing having a fluid inlet and a fluid outlet; a biasable disk carried within said housing disposed transverse to a preselected direction of fluid flow through said housing for controlling fluid flow through said housing; a valve seat carried by said housing ag

A backflow check valve comprising: a housing having a fluid inlet and a fluid outlet; a biasable disk carried within said housing disposed transverse to a preselected direction of fluid flow through said housing for controlling fluid flow through said housing; a valve seat carried by said housing against which said disk is biasly urgeable; and first and second disk-biasing means carried by said housing for biasly engaging said disk, at least one of said first and second disk-biasing means having an edge formed from two intersecting planar surfaces, the other one of said first and second disk-biasing means having a depression into which said edge is insertable for simultaneously engaging and respectively biasing opposite sides of said disk between said edge and said depression, said first and second disk-biasing means further including means carried by said housing for biasly engaging said disk along a first pair of spaced opposite end portions thereof and for biasly engaging said disk along a second pair of spaced opposite end portions thereof intermediate the first pair of disk end portions for preventing fluid from flowing contrary to said preselected direction of flow said second-biasing means including said valve seat and said depression, said valve seat being annular and said depression and said valve seat forming a concave cylindrical section, said section being cylindrical about an axis transverse to said direction of fluid flow, said section having a valley disposed transverse to said preselected direction of fluid flow.