Adjustable connection for a quick change adapter

Claim 1

An adjustable connection comprising a threaded shaft element and a second collar element mounted thereon and having an internal bore formed therein and allowing axial adjustment therebetween; means locating said first and second elements with respect to each other including internal bore surface portions on either side of an annular recess formed in said bore with respect to the said external thread on said first element to thereby control runout between said first and second elements by means of said sliding fit between said internal bore surface portions and said external thread on said first element; a split retaining ring carried by said second element in said annular recess and formed with a complementary thread in threaded engagement with said external thread of said first element; a pin carried by said second element and extending radially between said split of said split retaining ring to prevent relative rotation between said split retaining ring and said second element; adjustable means carried by said second element and selectively operable to compress said retaining ring against said external thread of said first element to thereby prevent movement of said split retaining ring with respect to said first and second elements whereby said first and second elements may be selectively secured together in any adjusted position.