Cam-lock fitting

A tube connector comprising:

• (a) a hollow generally tubular body comprises a shank, a nipple of outside diameter less than that of said shank, and a central portion intermediate said shank and said nipple and being of outside diameter less than that of said nipple such that the end of a flexible hose can be received over said nipple and central portion;
• (b) a collar engaged on said body around said central portion and being axially movable from a position in axial abuttment with said shank toward said nipple, said collar having an interior surface with a taper which expands toward the nipple end of said body such that axial advancement of said collar along said body toward said nipple creates a decreasing clearance between said nipple and said interior surface, the dimensions of said nipple and interior surface being such that advancement urges said collar into increasing circumferentially pinched relation with a hose received over said nipple to securely lock same thereon;
• (c) said tubular body defining a coaxial helical ramp along the edge of said shank abutting said collar and said collar defining a ramp follower surface to slide along said ramp such that when said collar is rotatably adjusted in one direction it is axially advanced into said increasing circumferentially pinched relation with a hose on said nipple, whereby alternatively rotatation or direct non-rotational axial advancement of said collar will similarly effect locking engagement of a hose on said nipple with or without a mechanical advantage, respectively, and reverse axial displacement of said collar on said body disengages same from a hose on said nipple.