Abstract: A flexible, resilient pet door flap hung in a frame so that it is movable in the horizontal direction between vertical side walls has peripheral Z-shaped edge portions terminating in web portions for effecting a seal against the side walls. The bottom portion of the frame includes a movable sill with magnets corresponding to magnets in the flap, and a secured piston in the frame having a surface adjacent a surface of the sill, with viscous material therebetween, to inhibit movement of the sill.

Abstract: A connector for tubular sections has two elements separable by threaded screws for engaging the interior walls of the tubular sections. The screws are threaded into connectors on one element, and have affixed nuts that engage the other element from inside to separate the elements. One screw has a recessed head so that a tubular section may slide over it. The other projects, to locate the coupling in one of the tubular sections. The projecting screw is located near an end of the coupling element, allowing the other end to be pivotally narrowed for mounting of a tubular section.

Abstract: A panel for securing in a conventional sliding door opening to cooperate with the sliding doors therein has a swinging door flap at the bottom of a panel defined by vertical stiles which may be trimmed to suit varying door frame heights and which may be adjusted in width in one embodiment by breaking away segments of the stiles. The stiles bear fixed projections to fit horizontal apertures at the door stile and sliding projections to fit aperatures in sill and top rail of the frame. The panel has an adjustable rail which overlaps the weather pane of the panel at top or bottom of the pane. The access door flap swings from an intermediate rail which may be a part of a panel or part of a sub-assembly mountable in any opening. The flap has imbedded magnets to arrest it closed and thin wiper edges to seal against weather, and is self-hinging in the intermediate rail. In one embodiment a vertically movable sill in the bottom rail rises to meet the lower edge of the flap in the closed position.

Abstract: A panel for securing in a conventional sliding door opening to cooperate with the sliding doors therein has a swinging door flap at the bottom of a panel defined by vertical stiles which may be trimmed to suit varying door frame heights. The stiles bear fixed projections to fit horizontal apertures at the door stile and sliding projections to fit apertures in sill and top rail of the frame. The panel has an adjustable rail which overlaps the weather pane of the panel at top or bottom of the pane. The access door flaps swings from an intermediate rail which may be a part of a panel or a part of a sub-assembly mountable in any opening. The flap has imbedded magnets to arrest it closed and thin wiper edges to seal against weather, and is self-hinging in the intermediate rail.