초록 ▼

A releasable coupling for plastic or metal tubes wherein the means for retaining one end of a tube within the coupling body comprises a metal retainer ring having circumferentially spaced spring fingers thereon which incline radially and axially inwardly from the outer periphery of the ring. The inn

A releasable coupling for plastic or metal tubes wherein the means for retaining one end of a tube within the coupling body comprises a metal retainer ring having circumferentially spaced spring fingers thereon which incline radially and axially inwardly from the outer periphery of the ring. The inner ends of the fingers are adapted to frictionally engage and bite into the surface of a tube inserted therethrough to prevent its withdrawal. Axial movement of the ring within the coupling body is prevented in one direction by axially extending fingers on the ring engaging an inwardly projecting annular shoulder in the bore of the body. Axial movement of the ring in the opposite direction is prevented by retaining means located at least partially within the bore of the body positioned adjacent an annular seal engaging one face of the ring.

대표청구항 ▼

A releasable tube coupling comprising a body having a stepped bore therein, said bore having an open end for receiving one end of a tube and also having a radially inwardly projecting annular shoulder facing said open end and spaced axially inwardly therefrom, a spring metal ring in said bore, said

A releasable tube coupling comprising a body having a stepped bore therein, said bore having an open end for receiving one end of a tube and also having a radially inwardly projecting annular shoulder facing said open end and spaced axially inwardly therefrom, a spring metal ring in said bore, said ring having a circumferentially continuous radially inwardly directed annular portion provided with a central aperture to enable the end of the tube to be inserted therethrough, said ring having a plurality of circumferentially spaced fingers thereon projecting axially from the outer periphery of said annular portion and adapted to engage said shoulder in said bore to limit displacement of said ring in a direction axially inwardly of said bore, an annular seal in said bore having one side thereof axially abutting said annular portion of the ring on the side thereof opposite said fingers, said seal having an inner diameter dimensioned to seal with the outer periphery of a tube inserted therethrough and an outer diameter dimensioned to seal with said bore, means in said bore engaging the opposite side of said seal for retaining the seal in said bore, said ring also having a plurality of circumferentially spaced fingers thereon connected at their radially outer ends with said annular portion and inclined radially and axially inwardly of said bore, said spring fingers extending inwardly from the radially outermost periphery of said ring and terminating in sharp edges at their free inner ends which are spaced radially inwardly of the edge of the central aperture therein, whereby said spring fingers are adapted to frictionally engage and bite into the outer periphery of a tube inserted through said ring to prevent its withdrawal from within said body, said spring fingers having a length substantially greater than the radial distance between the inner and outer peripheries of said ring and, therefore, being readily flexible so as to accommodate tubing which is out-of-round and also tubing which may be smaller or larger than a nominal specified size.