Pivot hinge

A pivot hinge for coupling two parts to each other to produce a concealed pivot joint, the pivot hinge comprising truncated bores in the two parts, two pivot members for engaging the bores, each pivot member including a first portion having an outer dimension sized for insertion into one of the bores, means for securing the portion of the pivot members in the truncated bores in fixed relationship to the parts, each pivot member further including an axially extending opening therethrough, at least one of he pivot members further including a second portion providing a thrust bearing between the two parts, bearing means received in the openings for allowing the two members to rotate relative to each other and releasable locking means for engaging said thrust bearing and bearing means which releasable locking means, when engaged, prohibits lateral separation of the two members and, when disengaged, permits separation of the two members to allow separation of the parts.

A concealed pivot hinge for rotatably coupling two parts to each other comprising truncated bores in the two parts, pivot members for engaging the truncated bores in each part, each pivot member including a first portion having a leading end sized for insertion into the truncated bore in one of the parts, a plurality of ribs on the outer surface of the first portions for gripping the inner surfaces of the bores to secure the pivot members in fixed relationship to the parts, the ribs being axially spaced apart on the outer surfaces, the outer surfaces being sloped inward toward the leading ends so that the depth of the spaces between adjacent ribs gradually increases toward the leading ends, at least one of the pivot members including a second portion providing a thrust bearing between the two parts, bearing means for allowing the pivot members to rotate relative to each other, and retaining means cooperating with said thrust bearing and said bearing means to prohibit separation of the pivot members.