Patent ID: 7857031

Claim:
A guide assembly, for use in controlling the position of the top panel of an overhead sectional door to prevent the panel from contacting a door lifting assembly, mounted on the jamb of a door opening, as the panel moves past the lifting assembly, comprising: a corner bracket for mounting on the jamb, the corner bracket supporting an elongated curvilinear guide means comprising a sequence of convex, concave and convex portions; a support bracket having means for pivotally mounting the support bracket to an upper corner of the top panel, the support bracket further having means for engaging and following the guide means, whereby the support bracket may pivot in the course of travel along the guide means; and composite means for controlling pivoting of the support bracket in the course of travel, said composite means comprising an elongated first part supported by the corner bracket and a second part connected with the support bracket, the second part being adapted to engage the first part so that pivoting of the support bracket is responsive to the shaping of the first part; wherein the curvilinear guide means is a corner track section; and wherein the first part of the composite means is an elongated cam track having a concave central portion, the cam track forming upper and lower cam surfaces; and the second part of the composite means is a cam follower; the composite means being arranged so that, when the sectional door is opening, the cam follower engages and follows the lower cam surface and, when the door is closing, the cam follower engages and follows the upper cam surface.