초록 ▼

A tube coupling having a throughway open at one end to receive a tube end, an annular groove encircling the throughway at a location spaced from said open end and an annular flexible sealing washer mounted in the groove and having an inner peripheral portion which projects through the open mouth of

A tube coupling having a throughway open at one end to receive a tube end, an annular groove encircling the throughway at a location spaced from said open end and an annular flexible sealing washer mounted in the groove and having an inner peripheral portion which projects through the open mouth of the groove to engage an outer surface of a tube which is a close fit in the throughway. The groove has one side nearest the open end of the throughway which lies in a plane generally transverse to the throughway to limit flexing of the inner part of the sealing washer towards the open end of the throughway and an opposite side of which is relieved at the mouth of the groove to allow the inner part of the sealing washer to take up a curvature in being deformed by forcing a tube through the washer. Thus the resulting stretching of the inner part of the washer by the tube provides a seal between the washer and tube and fluid pressure on the side of the sealing washer facing into the coupling body enhances the seal between the washer and tube.

대표청구항 ▼

[ I claim:] [1.] A tube coupling having a throughway open at one end to receive a tube end, an annular groove encircling said throughway at a location spaced from said open throughway end, an annular flexible sealing washer located between spaced first and second sides of said groove, and means for

[ I claim:] [1.] A tube coupling having a throughway open at one end to receive a tube end, an annular groove encircling said throughway at a location spaced from said open throughway end, an annular flexible sealing washer located between spaced first and second sides of said groove, and means for sealing the sides of said washer to the respective said sides of said groove, said washer having an inner peripheral portion which projects through the open mouth of said groove, the inner periphery of said washer engaging an outer surface of a tube which is closely fitted within said throughway, said first groove side being located nearest said open throughway end and lying in a plane generally transverse to said throughway, said washer being located adjacent said first groove side, flexing of said inner peripheral washer portion towards said open throughway end big limited by said first groove side, said second groove side opposite said first groove side and having an annular recess at said mouth of said groove, said groove increased in width at said mouth by said annular recess whereby said inner peripheral washer portion is allowed to take up a curvature adjacent its inner periphery on forcing a tube of slightly greater diameter than the inner diameter of said washer through said throughway and said washer, deformation of said inner peripheral washer portion by said tube providing a seal between said washer inner periphery and the outside surface of the tube, and wherein the seal between said washer and the tube is enhanced by fluid pressure on the side of said sealing washer facing into said coupling body.