Abstract: A pivot connection with a locking member which includes a first body with a link with a pivot pin passage. A second body has a pair of arms with pivot pint apertures and the second body straddles the link on the first body. A polygonal boss is formed on one of the arms of the second body surrounding the pivot pin aperture. A third body is provided with a polygonal boss receiver, a pivot pin aperture and a shoulder that engages the first body to prevent relative rotation of the first and third bodies. A pivot pin extends through the pivot pin aperture of the third body, the aligned pivot pin apertures of the second body and the pivot pin passage of the first body. A pressure member engages the pivot pin to apply pressure upon the third body to maintain the polygonal boss in engagement with the boss receiver.

Abstract: A pivot connection for a grapple having a link member with a journal-bore at one end, a yoke member with spaced-apart parallel arms receiving the one end of the link member therebetween bores in the arms, and a pivot pin mounted through the bores in the arms in the yoke member and the journal-bore in the link member to pivotally connect the two members together. Tapered, counter-bored brake surfaces are provided in each side of the link member concentric with the journal-bore. Tapered brake cores are slidably mounted on the pivot pin and located in the counter-bores facing each other, each core located between an arm of the yoke and the link member, in such a way that the break cores are not load bearing structures in the pivot connection. A mechanical connection applies pressure to one of the cores to force both cores against the brake surfaces to brake the link member relative to the yoke member.