초록 ▼

A bidirectional metal-to-metal seal of material composition with low modulus of elasticity and yield strength which is gall resistant and designed to seal against fluid pressure in the annulus between concentric cylindrical members. The seal comprises an annular body of U-shape and radial cross sect

A bidirectional metal-to-metal seal of material composition with low modulus of elasticity and yield strength which is gall resistant and designed to seal against fluid pressure in the annulus between concentric cylindrical members. The seal comprises an annular body of U-shape and radial cross section with an annular base and a pair of coaxial sealing lips integral therewith. An annular bridge of similar composition is inserted in the gap between the sealing lips and fluid pressure in the annulus is cemented to the gap by recesses in the inner wall of one of the sealing lips. The exterior surface of the one lip is provided with a pair of axially spaced circumferential flanges, the radial extremities of which provide annular sealing surfaces. The exterior of the other lip is provided with a central circumferential cylindrical sealing surface between adjoining tapered surfaces, diverging from the respective ends of said other lip to the central cylindrical sealing surface and the upper one of which is adapted to engage a similarly tapered shoulder on the member with which it is to seal.

대표청구항 ▼

[ What is claimed is:] [1.] A bidirectional metallic sealing ring comprising an annular body having a continuous ring base portion with a planar annular end surface and two concentric radially spaced annular sealing lips integrally joined to said base portion in coaxial relation therewith, said annu

[ What is claimed is:] [1.] A bidirectional metallic sealing ring comprising an annular body having a continuous ring base portion with a planar annular end surface and two concentric radially spaced annular sealing lips integrally joined to said base portion in coaxial relation therewith, said annular body having a U-shape in radial cross section whereby a gap is formed between said annular sealing lips, said annular body further having an external cylindrical sealing surface on a first one of said annular sealing lips and a first annular tapered frusto-conical surface extending and diverging outwardly from the end of said base portion to said cylindrical sealing surface and a second annular frusto conical tapered surface extending from said cylindrical sealing surface in a convergent inwardly direction to the free end of said first sealing lip, said annular body further having an external surface on the other of said annular sealing lips, a pair of axially spaced annular flanges projecting from said external surface of the other of said annular sealing lips and located in parallel axially spaced relation to one another such that the axial distance of said cylindrical sealing surface from said base portion is intermediate the axial distances of said annular flanges from said base portion, each said annular flanges having a rounded external surface and an arcuate radial cross section whereby the radial extremity of each said annular flanges provides a sealing surface, said other of said annular sealing lips having a coaxial inner surface with a grooved annular central recessed portion and axially spaced annular cylindrical end portions with a notch provided in one of said annular cylindrical end surface portions extending from the free end of said other sealing lip for the axial length thereof and communicating with the groove provided by said central recessed portion, andan annular metallic bridge member with cylindrical side walls inserted within said gap formed between said annular sealing lips and having a planar end wall in abutting relation to said continuous ring base portion.