Valve construction and method

Claim 2

In a valve construction, a valve body having aligned flow passages, a valve member within the body movable between open and closed positions, the valve member having at least one valve working surface, and an annular sealing assembly carried by the body and surrounding one of the flow passages for closed position of the valve, the sealing assembly including an annular rigid seat member carried by the body and sealed with respect to the same, said member having one annular end face of the same disposed adjacent said valve working surface and formed to provide annular recessing, annular sealing means of non-metallic resilient material disposed in said annular recessing, said end face also being provided with annular grooving to provide two annular lips adjacent peripheral surfaces of the sealing means, said lips being bent in opposite directions into locking engagement with the annular sealing means, the width of each lip portion when viewed in section being substantially less than the depth of the recessing.

Claim 3

A valve as in claim 1 in which the said sealing means consists of a ring of relatively hard resilient non-metallic material together with two annuluses of more resilient material adjacent the outer and inner peripheral surfaces of the ring, the two annular lip portions being bent toward the sealing means to lock the same within the recess.

Claim 4

A valve as in claim 1 in which the recessing provides two radially spaced recesses and in which the sealing means includes two annuluses of non-metallic resilient material disposed within the recesses, the lip portions being between the two annuluses, the grooving being between the lips.

Claim 5

In a valve construction, a valve body having aligned flow passages, a valve member within the body movable between open and closed positions, the valve member having at least one valve working surface, and a sealing assembly carried by the body And surrounding one of the flow passages for closed position of the valve, the sealing assembly including an annular rigid seat member carried by the body and sealed with respect to the same, one end portion of said member having an end face disposed adjacent said valve working surface, radially spaced first and second concentric annular recesses formed in said end portion of the annular member, rings made of non-metallic resilient material fixed in each of said recesses and adapted to contact said valve working surface, said end portion of the seat member having an annular groove formed between said recesses, and means between said recesses and said groove for locking the rings within the recesses, said means comprising two concentric and oppositely bent annular lip portions formed integral with the seat member, the lip portions when viewed in section having a width substantially less than the depth of the recesses.

Claim 6

In a valve construction, a valve body having aligned flow passages, a valve member within the body movable between open and closed positions, the valve member having at least one valve working surface, and a sealing assembly carried by the body And surrounding one of the flow passages for closed position of the valve, the sealing assembly including an annular rigid seat member carried by the body and sealed with respect to the same, one end portion of said member having an end face disposed adjacent said valve working surface, radially spaced first and second concentric annular recesses formed in said end portion of the annular member, rings made of non-metallic resilient material fixed in each of said recesses and adapted to contact said valve working surface, said end portion of the seat member having an annular groove formed between said recesses, and means between said recesses and said groove for locking the rings within the recesses, said means comprising two concentric and oppositely bent annular lip portions formed integral with the seat member, the lip portions when viewed in section having a width substantially less than the depth of the recesses.

Claim 7

A valve as in claim 4 in which a groove is formed in the metal of the seat member between said recesses, said groove serving to form said lip portions.

Claim 8

A valve as in claim 4 in which one of said recesses accommodates a ring formed of relatively hard resilient material and an annulus of non-metallic resilient material more resilient than the material of said ring interposed between the annular ring and one peripheral surface of the recess, said annulus being radially compressed and having a surface disposed to contact and establish a seal with respect to the valve working surface.