Patent ID: 8419694

Claim:
A clamping assembly, comprising: a first clamping member defining a first lumen dimensioned to non-rotatably engage a first portion of a tubular member, wherein rotating the first clamping member effects rotation of the first portion of the tubular member; and a second clamping member defining a second lumen dimensioned to non-rotatably engage a second portion of the tubular member, wherein rotating the second clamping member in relation to the first clamping member rotates the second portion of the tubular member in relation to the first portion of the tubular member to twist the tubular member to restrict flow through the tubular member; wherein the first clamping member defines a first contoured surface and the second clamping member defines a second contoured surface, the first and second contoured surfaces facing each other and being complementary to each other, the first and second contoured surfaces each having a wave configuration around a circumference thereof, whereby the first and second contoured surfaces are configured to releasably engage each other in at least two orientations of the clamping assembly to prevent relative rotation of the first clamping member in relation to the second clamping member, the first and second contoured surfaces being interlocked in the at least two orientations.