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US 5,522,446 AGranted
Sectional overhead door
AssigneeWayne-Dalton Corp.
InventorsWillis J. Mullet, Albert W. Mitchell
Life of this patent
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AssigneeWayne-Dalton Corp.
InventorsWillis J. Mullet, Albert W. Mitchell
Estimating the term…
A sectional door (20) having a plurality of panels (21, 22, 23, 24) including, a body portion (25) of the panels spacing and joining longitudinal edges (40, 50), one of the edges (40) between adjacent panels on a first panel having a substantially concave curvilinear surface (45) in vertical cross-section, the other of the edges (50) between adjacent panels on a second panel having a substantially planar surface (52) in vertical cross-section, longitudinally-spaced hinges (65) interconnecting the first and second panels for pivotal movement. The hinges include a first hinge element (66) having a first leaf (67) overlying and attached to one of the adjacent panels, a generally cylindrical first knuckle (72) at one edge of the first leaf, a through slot (73) in the first leaf proximate the first knuckle, a second hinge element (80) having a second leaf (85) overlying and attached to an adjacent panel, and a generally cylindrical second knuckle (81) at one edge of the second hinge element extending into the through slot and rotatable about the first knuckle. A panel (22) for sectional door (20) having a generally rectangular foam core (140, 240, 340), an inner surface (145, 245, 345) extending the longitudinal length of said foam core, and a recess (150, 250, 350) in the inner surface and the foam core extending the longitudinal length of the foam core. A bracket assembly (110) for the bottom (35) of the lower panel (24) of the door including, an L-shaped plate (111) overlying a portion of the inner surface (36) of the lower panel, a generally cylindrical sleeve (120) affixed on the plate for receiving a shaft (121) mounting one of the rollers (122), fasteners (115) for attaching the L-shaped plate to the lower panel positioned to underlie a portion of the cylindrical sleeve and the shaft, and cut-outs (125) in the cylindrical sleeve positioned substantially above the fasteners whereby the fasteners may be removed only when the shaft is not positioned in the cylindrical sleeve.
A sectional door having a plurality of panels joined for articulation between adjacent panels for moving between a closed position and an open position comprising, a body portion of the panels spacing and joining longitudinal edges and having an inner surface and an outer surface, one of said edges between adjacent panels on a first panel having a substantially concave curvilinear surface in vertical cross-section in the closed position of the door, the other of said edges between adjacent panels on a second panel having a substantially planar surface in vertical cross-section in the closed position of the door extending angularly from substantially said outer surface of said panels, longitudinally-spaced hinge means interconnecting said first and second panels and defining a pivot axis for pivotal movement between planar and varying angular orientations when moving between the open position and the closed position with said concave surface and said planar surface in proximate facing relation in the closed position, said planar surface and said concave surface remaining in sufficiently close proximity during the entirety of the pivotal movement of said first and second panels so as to preclude the insertion of a person's finger therebetween while maintaining adequate clearance to avoid interference, said concave surface being circular and centered about a point displaced substantially inwardly of said inner surface of said body portion of the panels.
A sectional door having a plurality of panels joined for articulation between adjacent panels for moving between a closed position and an open position comprising, a body portion of the panels spacing and joining longitudinal edges and having an inner surface and an outer surface, one of said edges between adjacent panels on a first panel having a substantially concave circular surface in vertical cross-section, the other of said edges between adjacent panels on a second panel having a substantially planar surface in vertical cross-section extending angularly across said concave circular surface in proximate facing relation in the closed position of the door, longitudinally-spaced hinges defining a pivot point interconnecting said first and second panels for pivotal movement between planar and varying angular orientations when moving between the open position and the closed position, said concave circular surface having a center displaced a substantial distance inwardly of the body portion of the panels, whereby said planar surface and said concave surface remain in sufficiently close proximity during the entirety of the pivotal movement of said first and second panels so as to preclude the insertion of a person's finger therebetween while providing rapid separation of said edges upon pivotal movement from planar orientation of said panels to preclude the creation of drag forces.
Dependencies are inferred from the claim text.