Patent ID: 7585294

Claim:
A coupling device comprising a first connector part and a second connector part, each connector part including at least one connecting portion configured to engage with at least one corresponding connecting portion of the other connector part to connect said first and second connector parts in substantially linear alignment with one another, a releasable locking member configured to assist in disengaging the engagement between said connecting portions, said releasable locking member having a first engagement structure and being secured to the first connector part in a fixed position relative to a longitudinal axis of said first connector part while being rotatably movable about said first connector part at said fixed position, said second connector part having a disk with a through-going hole in communication with each corresponding connecting portion, respectively, and a second engagement structure on said disk, said first and second engagement structures being complementary to one another to engage through respective rotational movement thereof about said longitudinal axis to lock the connection between said first and second connector parts against separation in response to longitudinally directed force in an absence of respective counter-rotational movement of said first and second engagement structures.