Patent ID: 7029196

Claim:
A system for joining two bodies, comprising: a rotatable locking member having a pair of diametrically opposed notches, a pair of diametrically opposed first sectors having a first radius, and a pair of diametrically opposed second sectors having a second radius larger than said first radius; a shaft attached to and extending axially from said locking member; a first body having a cavity and an opening for inserting said locking member into said cavity, said cavity having a size permitting rotation of said locking member and said opening being smaller than said cavity to prohibit removal of said locking member from said cavity when said locking member has been rotated out of alignment with said opening; a first pin extending into said cavity; and a movable first stopper in said first body and that is urged into said cavity to said first radius at a position where said first stopper engages one of said first sectors when said first pin is engaged in one of said notches and one of said second sectors is between said one first sector and said notch that engages said first pin.