Access door mounted on pivoting frame

An access door apparatus for covering an aperture in a structure in a manner that permits access through said aperture when required, said apparatus comprising:

• a door frame adapted to be fixedly mounted at said aperture and to said structure, said door frame having frame walls extending around and defining an access opening;
• a panel member capable of covering at least said access opening on an exterior side of said door frame and having at least one fastener hole formed therein;
• two pivotable connecting links joining said panel member to two of said frame walls disposed on opposite sides of said access opening, each of said links having an inner end pivotably connected to an inner surface of its respective frame wall and an outer end pivotably connected to a respective lug provided on an inner surface of said panel member;
• and
• a rigid frame member extending between and rigidly connecting said two connecting links whereby the two connecting links pivot with each other,
• wherein said panel member can be moved from an open position where said access opening is uncovered and open to a closed position where said panel member covers said access opening and wherein during use of said apparatus at least one fastener extending through said at least one fastener hole can be used to secure said panel member in said closed position.

An access door apparatus for covering an aperture in a structure in a manner which permits access through said aperture when required, said apparatus comprising:

• a door frame adapted to be rigidly mounted at said aperture and to said structure, said frame extending around and defining an access opening;
• a panel member capable of covering at least said access opening on a front side of said door frame and having pivot mounts provided thereon;
• two connecting links each pivotably connected to a respective one of said pivot mounts at an outer end thereof, each pivotably connected to said door frame at an inner end thereof, and arranged so that the links are on opposite sides of said access opening, said links permitting said panel member to be moved from an open position where said access opening is completely uncovered and said panel member is spaced apart from said access opening to a closed position where said panel member covers said access opening, said panel member being free to pivot on the connecting links when said connecting links are stationary and are in a position where said outer ends thereof are away from said access opening;
• a rigid frame member extending between and rigidly connecting said two links whereby the two links pivot with each other;
• and
• means for holding said panel member in said closed position, said holding means comprising at least one threaded fastener and a threaded hole provided on said rigid frame member.

An access door apparatus for covering an aperture in a structure in a manner which permits access through said aperture when required, said apparatus comprising:

• a door frame adapted to be rigidly mounted at said aperture and to said structure, said frame extending around and defining an access opening;
• a panel member capable of covering at least said access opening on a front side of said door frame and having pivot mounts provided thereon;
• two connecting links each pivotably connected to a respective one of said pivot mounts at an outer end thereof, each pivotably connected to said door frame at an inner end thereof, and arranged so that the links are on opposite sides of said access opening, said links permitting said panel member to be moved from an open position where said access opening is completely uncovered and said panel member is spaced apart from said access opening to a closed position where said panel member covers said access opening, said panel member being free to pivot on the connecting links when said connecting links are stationary and are in a position where said outer ends thereof are away from said access opening;
• and
• means for holding said panel member in said closed position, said holding means comprising a plurality of threaded fasteners and a plurality of screw holes formed in said door frame and in said panel member,
• wherein said threaded fasteners and screw holes can be used to detachably connect said panel member to said door frame.