Patent ID: 7410193

Claim:
A tube coupling adapted to receive and hold an end portion of a tube, the end portion having a periphery and a terminal end face, the tube coupling comprising: a coupling body having a throughway open at one end, the throughway being adapted to receive the end portion of the tube, the throughway extending through the coupling body so as to allow fluid to pass through the coupling body; an annular seal encircling the throughway, the annular seal being adapted to seal with the periphery and the terminal end face of the tube when the tube is received within the throughway; a cap mounted on the coupling body, the cap having a tube locking device rotatably mounted therein, the tube locking device being adapted to engage and hold the tube in the cap when the tube is received within the cap; means for guiding the cap on the coupling body in an axial direction along the coupling body with rotation of the cap from a first position to a second position; and means for resisting rotation of the locking device with respect to the cap whereby rotation of the cap between said first and second positions does not cause the tube to rotate, the means for resisting rotation being disposed on the locking device and the coupling body so as to physically interengage; wherein when the cap is in the first position, the tube is retained by the locking device when the tube is inserted through the cap and into the seal in the throughway and when the cap is in the second position, the tube end is held positively in engagement with the seal in the throughway.