Tube connector

A tube connector including a hollow body defining an entrance aperture at one end thereof for insertion of a tube to be tested, a cylinder defined internal to said body, a piston slidably disposed within said cylinder, gripping means associated with said body disposed adjacent said entrance aperture operable to allow insertion of said tube into said body and to secure said tube in place after insertion, a chamber defined in one end of said piston, said chamber including an outer wall defined by an internal wall of said piston, said chamber adapted to receive and confine a seal therein, a compressible, annular seal disposed in said chamber combined between said outer wall of said chamber and said body, said seal adapted to surround the outer periphery of said tube to be tested, said chamber having a depth slightly less than the corresponding width of said seal in its uncompressed condition, a cam lever associated with said piston positionable in an open position and movable to a closed position wherein said piston is moved relative to said hollow body compressing said seal in said chamber between said outer wall of said chamber, said tube and said body thereof causing said seal to engage and seal against the outer periphery of said tube to be tested, and a fluid path defined between said tube and said chamber whereby, upon pressurization of said tube connector, said pressure is communicated along said fluid path to said chamber and is effective to act against said seal which is confined by said chamber causing further compression of said seal resulting in an increase in sealing effectiveness.