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US 4,951,349 AGranted
Hinge motion regulator for eyeglasses
AssigneeOptische Werke G. Rodenstock
InventorsAnton Dietrich, Detlef Kreuz
Life of this patent
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AssigneeOptische Werke G. Rodenstock
InventorsAnton Dietrich, Detlef Kreuz
Estimating the term…
A motion regulator for a hinge such as, for example, a tripartite eyeglass hinge, with at least two hinge tabs and a hinge screw, a sleeve surrounding the hinge screw disposed in a hinge eye of the hinge tab. The sleeve projects beyond the hinge tab and rests against a neighboring hinge tab or tabs. In order to obtain an objective that a braking torque, determining the motion characteristics of the hinge, is substantially constant and independent of the tightening torque of the hinge screw, a spring-elastic element is arranged at least between the hinge tab wherein the sleeve is located and the hinge tab movable with respect to this hinge tab. The spring-elastic element, resilient in the axial direction with respect to the hinge screw axis, is in contact under a pretensioning with a contact surface of at least one hinge tab, which surface is rotationally symmetrical with respect to the hinge screw axis.
A motion regulator for a hinge including at least a first hinge tab and a second hinge tab, a hinge screw means for movably securing said first and second hinge tabs to each other, a rigid sleeve means for surrounding and accommodating the hinge screw means, said rigid sleeve means being disposed only in a hinge eye means of the second hinge tab for accommodating said rigid sleeve means, said rigid sleeve means having an axial length greater than an axial length of said hinge eye means so as to project beyond opposed edges defining respective ends of the hinge eye means of said second hinge tab tab in such a manner that the sleeve rotates with the second hinge tab, and at least one spring elastic means arranged between the first hinge tab and said second hinge tab under a pretensioning with said at least one spring elastic means being in contact with a contact surface of said first hinge tab means, said contact surface being radially symmetrically disposed with respect to a longitudinal center axis of the hinge screw means, and wherein said at least one spring means is, resilient in an axial direction with respect to the longitudinal center axis of said hinge screw means.
Dependencies are inferred from the claim text.