Hose coupling

In an accessory for a resilient hose in which an end of the hose is to be connected with a supplementary fitting, the improvement comprising:

• a. a centerpiece sealingly connected with the supplementary fitting and having a bore penetrating longitudinally therethrough and having concentric about the adjacent at least one end of the bore an inverted frusto conical section adapted to sealingly receive on its exterior frusto conical surface the interior of the end of the hose and to support the end against a longitudinal tightening force by a gripper means;
• b. at least one gripper means disposed concentrically about said inverted frusto conical section in receiving position with sufficient annular clearance to receive the end of the hose for insertion over said inverted frusto conical section;
• said gripper means having a plurality of shoulders of respectively monotonically decreasing radii longitudinally thereof from its end facing said centerpiece toward its other end, each shoulder having its same radius over a predetermined distance longitudinally, such that the distance between said shoulder and said exterior frusto conical surface decreases as said gripper means is moved longitudinally of said centerpiece so as to embed in and grip the resilient hose and retain it in place on said centerpiece when said gripper means is moved longitudinally of said inverted frusto conical surface with the hose in place;
• said gripper means having a first portion of a longitudinal moving means for moving said gripper means longitudinally of said inverted frusto conical section responsive to relative rotational motion between said gripper means and a surrounding turnbuckle means;
• c. turnbuckle means surrounding said gripper means;
• said turnbuckle means having a second portion of said longitudinal moving means for moving said gripper means longitudinally of said inverted frusto conical section responsive to relative rotational motion between said gripper means and said turnbuckle means;
• said turnbuckle means having a second portion of longitudinal moving means complementarily engaging said first portion of said longitudinal moving means;
• said centerpiece being contained within said turnbuckle means so as to prevent relative longitudinal motion therebetween and permitting relative rotational motion therebetween;
• and
• d. rotation prevention means cooperating with said gripper means and said turnbuckle means such that said gripper means is prevented from rotating with respect to said turnbuckle means;
• said rotation prevention means being adapted to accommodate relative longitudinal movement between said gripper means and said centerpiece;
• such that after the end of the hose is inserted interiorly of said gripper means and over said inverted frusto conical section, said turnbuckle means can be rotated to move said gripper means longitudinally thereof and grippingly embed in and hold the end of the hose sealingly connected with said inverted frusto conical section.