Rotatable bellows-like cover

Claim 1

An improvement in a bellows-like flexible cover for a machine device having a movable joint therein to be covered, said cover comprising a plurality of centrally apertured annular flexible elements, some of which are affixed to one another at their outer peripheral edges and at their inner peripheral edges respectively to form a first bellows section of said cover and some of which are joined to one another at their outer peripheral edges and at their inner peripheral edges respectively to form a second bellows section of said cover, the improvement comprising a rotatable connection between said first and second bellows sections of said cover and comprising the disposition of one of said centrally apertured annular flexible elements on one end of one of said bellows sections of said cover between an attached pair of said centrally apertured annular flexible elements on an adjacent end of the other bellows section of said cover, a secondary centrally apertured annular flexible element attached at its outer peripheral edge to the outer peripheral edge of said centrally apertured annular flexible element disposed between said attached pair of centrally apertured annular flexible elements, an annular ring disposed in said area defined by said secondary centrally apertured annular flexible element adjacent its point of attachment to said centrally apertured flexible element disposed between said attached pair of centrally apertured annular flexible elements.