Apparatus for attaching hoses and tubes to a fitting

Claim 1

A hose coupling for terminating the end of a deformable hose or tubular member, comprising a fitting having an end adapted to be received interiorly of said hose and to expand the interior diameter of said hose when inserted therein, said fitting end having a smooth uninterrupted external surface to contact with the interior surface of said hose, a biconical shape with a first and second portion generally frusto-conical shaped and intersecting at a crest defining a largest diameter portion of said fitting for expanding said hose, and a locking sleeve having a smooth uninterrupted internal surface to contact with said hose, means for reducing stress on said conduit, said stress reducing means sandwiched between said sleeve and conduit, said locking sleeve locatable over said hose whereby to clampingly secure the hose between the fitting and sleeve, said fitting and sleeve are constructed such that a portion of each is formed with a matching frusto-conical surface defined by a double included angle of one to eight degrees the comical surfaces increasing in diameter toward the inserting end of said fitting, said double included angle of said sleeve being less than the double included angle of said fitting, and said sleeve and fitting retaining, sealing and positioning said hose between said sleeve and fitting.