Patent ID: 7971692

Claim:
An antiseismic support pad comprising: a base, the base including a soleplate and a bearing secured to the soleplate, the soleplate, while in contact with the support surface, resting freely on the support surface and holding the base in place on the support surface without a fastener; a spherical rolling element, the spherical rolling element being mounted in the bearing to rotate freely about a center of rotation in the bearing; a support plate having a concave bearing surface and resting on the spherical rolling element via the concave bearing surface, the support plate having a support plate axis substantially perpendicular to the soleplate; and an arrangement configured to suspend the base from the support plate and move the base resiliently in radial directions about the support plate axis when the soleplate is not in contact with the support surface, the arrangement being connected to the support plate and to the base, wherein the support plate comprises a top portion having a form of a bushing having an axis on the support plate axis, the bushing internally tapped over at least a fraction of its length and including a guide slot opening out in an outer side surface and extending parallel to the axis of the support plate, the antiseismic pad further comprising an actuation shaft having a threaded portion engaged by screw-fastening in the tapped portion of the bushing of the plate along the axis of the plate, and at least one guide and engagement part in which the shaft is mounted to rotate about the axis of the support plate and secured in translation with the at least one guide part including a guide element having a guide peg inserted in the slot of the bushing of the plate for guiding the plate in axial translation, whereby turning the shaft secured in axial translation with at least one engagement and guide part so as to screw it in or out relative to the tapped opening of the bushing of the plate, causes the engagement and guide part to move in translation along the axis of the plate relative to the support plate.