A hinge assembly for hingedly mounting a closure member onto a support so that the closure member can pivot between an open and a closed position, which hinge assembly comprises: - a first hinge member having at least one loop forming a pivot hole; - a second hinge member having at least one further loop forming a further pivot hole, which further loop is provided with a transverse hole giving access to said further pivot hole and being accessible in the open but not in the closed position of said closure member when this closure member is hingedly mounted by means of the hinge assembly to said support; and - a hinge pivot having a longitudinal axis and a first extremity which is provided with a fixed head having a lateral outer edge and a second extremity which is screw threaded to receive a correspondingly screw threaded fixing element of the hinge assembly, which hinge pivot is arranged to extend through said pivot holes (7, 10) to pivotally join the first and the second hinge members, with the head of the hinge pivot being situated on a first side of said loops (6, 9) and the fixing element which is screwed onto the hinge pivot on a second side of said loops (6, 9), opposite to the first side, the screw threads on the hinge pivot and on the fixing element enabling to unscrew the fixing element from the hinge pivot by applying a moment of force thereon which is at least equal to a predetermined minimum moment of force required to unscrew the fixing element from the hinge pivot, characterised in that said hinge pivot is rotatably mounted around its longitudinal axis in the pivot holes (7, 10) so that, when the closure member is hingedly mounted by means of the hinge assembly onto the support, the hinge pivot starts to rotate in said pivot holes (7, 10) when exerting a moment of force thereon which is smaller than said minimum moment of force; in that the hinge pivot is provided with a lateral recess which has to be aligned with the transverse hole in the second hinge member by rotation of the hinge pivot to be accessible, in the open position of said closure member, by a tool inserted through said transverse hole in said further loop to lock the hinge pivot against rotation with respect to the further loop to enable screwing said fixing element on and off the hinge pivot; and in that at least when the lateral outer edge of the fixed head has such a large height that it can be held by means of pliers, the hinge assembly comprises a spacer which is arranged to be provided between the head of said hinge pivot and said loops (6, 9), which spacer has a circumferential flange for shielding off the outer edge of the head of the hinge pivot, which circumferential flange defines a recess in the spacer for receiving the head of the hinge pivot, in which recess the head of the hinge pivot can rotate around said longitudinal axis with respect to the spacer. - a first hinge member having at least one loop forming a pivot hole; - a second hinge member having at least one further loop forming a further pivot hole, which further loop is provided with a transverse hole giving access to said further pivot hole and being accessible in the open but not in the closed position of said closure member when this closure member is hingedly mounted by means of the hinge assembly to said support; and - a hinge pivot having a longitudinal axis and a first extremity which is provided with a fixed head having a lateral outer edge and a second extremity which is screw threaded to receive a correspondingly screw threaded fixing element of the hinge assembly, which hinge pivot is arranged to extend through said pivot holes (7, 10) to pivotally join the first and the second hinge members, with the head of the hinge pivot being situated on a first side of said loops (6, 9) and the fixing element which is screwed onto the hinge pivot on a second side of said loops (6, 9), opposite to the first side, the screw threads on the hinge pivot and on the fixing element enabling to unscrew the fixing element from the hinge pivot by applying a moment of force thereon which is at least equal to a predetermined minimum moment of force required to unscrew the fixing element from the hinge pivot,