Rotatable stop fastener

Claim 1

A quick acting fastener which is locked by longitudinal reciprocation of one of the fastening members comprising: a cylindrical socket member having a cross pin extending diametrically thereacross and also having means for fixedly attaching it to a part to be fastened; a stud member having a head portion at the rear end and a relatively reduced shank portion at the forward end and also having means for attaching it to another part to be fastened for both axial and rotary motion, said stud member having at its forward end a pair of generally straight inclined portions meeting along a generally straight line at the terminal end of said stud member, a slot extending through said inclined portions transversely of said line and open at the forward end, and having extending rearwardly from said slot a pair of diametrically opposed cam slots, a locking shoulder on the forward wall of the cam slots for locking engagement with the cross pin upon rotation of the stud member, the wall forming each cam slot portion opposite the shoulder tapering axially rearwardly from the shoulder from a point substantially opposite to the shoulder and to a point circumferentially beyond the shoulder, so that axial reciprocation of the stud by pressing on the head causes the camming surfaces to engage the cross pin to rotate the stud member and cause the cross pin to have locking engagement with the cam slots; and a compression spring surrounding the shank of the stud to normally urge the stud member away from the socket member.