Breathing tube

Claim 2

A breathing tube for underwater activities, comprising: an elongated tube having a free end and an opposite mouth-receiving end; means for attaching said tube to a user's underwater mask having a strap portion, said attachment means comprising a tubular sleeve in free slideable engagement with said tube for relative sliding displacement and means on said sleeve for connecting said sleeve to said mask, said means comprising a pair of spaced-apart rings elastically gripping said sleeve and a link element interconnecting said rings to define with said sleeve a loop for receiving the strap portion of said mask; and stop means on said tube for preventing disengagement between said sleeve and said tube.

Claim 3

A breathing tube as claimed in claim 1, wherein said sleeve is provided at each end thereof with an outwardly extending peripheral flange acting as a stop for retaining each said ring on said sleeve.

Claim 4

A breathing tube as claimed in claim 1, wherein said stop means comprise a ring elastically gripping said tube and selectively positionable along a length of said tube intermediate the free end thereof and said sleeve, whereby to adjustably limit the relative sliding displacement between said sleeve and said tube.

Claim 5

A breathing tube as claimed in claim 1, wherein said tube is provided at the free end thereof with an outwardly extending peripheral flange acting as said stop means for preventing disengagement between said sleeve and said tube at said free end.

Claim 6

A breathing tube for underwater activities, comprising: an elongated tube having a free end and an opposite mouth-receiving end; means for attaching said tube to a user's underwater mask having a strap portion, said attachment means comprising a tubular sleeve in free slideable engagement with said tube for relative slideable displacement and means on said sleeve for connecting said sleeve to said mask; and stop means on said tube for preventing disengagement between said sleeve and said tube, said stop means coupling a ring elastically gripping said tube and selectively positionable along a length of said tube intermediate the free end thereof and said sleeve, whereby to adjustably limit the relatively sliding displacement between said sleeve and said tube.

Claim 7

A breathing tube for underwater activities, comprising: an elongated tube having a free end and an opposite mouth-receiving end; means for attaching said tube to a user's underwater mask having a strap portion, said attachment means comprising a tubular sleeve in free slideable engagement with said tube for relative slideable displacement and means on said sleeve for connecting said sleeve to said mask; and stop means on said tube for preventing disengagement between said sleeve and said tube, said stop means coupling a ring elastically gripping said tube and selectively positionable along a length of said tube intermediate the free end thereof and said sleeve, whereby to adjustably limit the relatively sliding displacement between said sleeve and said tube.

Claim 8

A breathing tube as claimed in claim 5, wherein said connecting means comprise a pair of spaced-apart rings elastically gripping said sleeve and a link element interconnecting said rings to define with said sleeve a loop for receiving a strap portion of said mask.

Claim 9

A breathing tube as claimed in claim 5, wherein said mouth-receiving end of said tube has a mouthpiece which is angularly inclined relative to the longitudinal axis of said tube and is forcably pivotable about said axis.

Claim 10

A breathing tube as claimed in claim 7, wherein said tube includes two straight portions joined by an intermediate arcuate portion, said straight and arcuate portions lying in a common plane, and wherein said mouthpiece extends in an oblique plane relative to said common plane.

Claim 11

A breathing tube as claimed in claim 8, wherein when in use by the user, said mouthpiece is engaged in the user's mouth and said sleeve is connected to the strap portion of said mask at a point rearwardly of the user's ear such that said arcuate portion of said tube extends substantially adjacent the ear lobe and in close proximity to the head and the straight portion of said tube adjacent the free end thereof extends substantially upwardly forwardly.