Ceiling access doors with hinges and an insulation dam
AssigneeA.J. Manufacturing Inc.
InventorsTodd Carlson, Brian A. Jensen, Gregory Miller
Life of this patent
Estimating the term…
Abstract
Insulated ceiling access doors have a two-part tongue and slot hinge. The doors are made of two interlock pans that are filled with injected polyurethane foam. The doors vary in length, width and thickness. The doors are mounted in ceiling access door frames. Four-part side and end walls insulation dams are permanently mounted above the door frames for holding back insulation from falling downward within the attic area. The doors have hold-open hardware.
Claims17
A ceiling access door with hinges and an insulation dam for a ceiling access opening with a wood frame therearound and a ceiling access door frame therebelow, comprising:
- a. a hollow ceiling access door that is injected and filled with liquid expanding curable foam;
- b. a two-part tongue and slot hinge connected to the ceiling access door and the wood frame;
- and
- c. a four-walled ceiling access insulation dam for resting on the ceiling access door frame and secured to the wood frame.
A ceiling access door with hinges and an insulation dam for a ceiling access opening with a wood frame therearound and a ceiling access door frame therebelow, comprising:
- a. a hollow ceiling access door made of two opposing rimmed pans adhesively secured together that is injected and filled with liquid expanding curable polyurethane foam;
- b. a two-part tongue and slot hinge comprises a flat tongue with a mounting plate connected to the ceiling access door and a second mounting plate to be attached to the wood frame have a tongue slot, the hinge fitting loosely together;
- and
- c. a four-walled ceiling access insulation dam comprising two metal end walls and two metal side walls that interconnect together by way of extending tabs that interlock with slots, the dam for resting on the ceiling access door frame, secured to the wood frame and adapted to hold back blown insulation.
A two-part tongue and slot hinge, comprising:
- a. a flat vertical metal tongue with a with a 90° horizontal first mounting plate adapted to be positioned and mounted to an edge of a horizontally positioned door to be pivoted upwardly or downwardly;
- and
- b. a second metal mounting plate adapted to be positioned and mounted vertically on a frame having a short wall 90° horizontally from the second mounting plate having a slot therein wherein the tongue is adapted to rest in the slot in a loose arrangement.
A four-walled ceiling access insulation dam for an attic ceiling access opening, comprising two metal end walls and two metal side walls that interconnect together by way of extending tabs that interlock with slots creating a rectangular shape, the dam for resting on a ceiling access door frame and secured to a wood frame.
A bifold ceiling access door for a ceiling access opening with a wood frame therearound and a ceiling access door frame therebelow, comprising:
- a. a hollow ceiling access door in excess of 2 inches thick made of two door panels each being injected and filled with liquid expanding curable foam and are adapted to rest on the ceiling access door frame;
- and
- b. a continuous piano hinge joining the two panels at their adjacent bottom edges so that the panels fold upwardly and abut each other to solve a geometric problem of door interference with the wood door frame without sacrificing insulated door thickness and provide easy open and closing of the doors.
Dependencies are inferred from the claim text.