The disclosure includes a method and apparatus for protecting an air vent pipe. In one or more embodiments, a cover can include a plurality of sidewalls and a pipe portal disclosed through at lease on of the side walls. The distal end of an air vent pipe can be disposed through the pipe portal and into the internal volume of the cover. A clamp can secure the cover to the air vent pipe. An access door disposed in a side wall can give access to the clamp and distal end of the air vent pipe and closing and locking the access door with a locking mechanism can prevent unauthorized users from accessing the distal end of the air vent pipe.

The disclosure includes a method and apparatus for protecting an air vent pipe. In one or more embodiments, a cover can include a plurality of sidewalls and a pipe portal disclosed through at lease on of the side walls. The distal end of an air vent pipe can be disposed through the pipe portal and into the internal volume of the cover. A clamp can secure the cover to the air vent pipe. An access door disposed in a side wall can give access to the clamp and distal end of the air vent pipe and closing and locking the access door with a locking mechanism can prevent unauthorized users from accessing the distal end of the air vent pipe.

The invention relates to a door assembly (1) allowing a sealed transfer between two enclosed volumes, comprising a flange (2) arranged to delimit an opening in one of the enclosed volumes, and a door (4) that extends along an axis (C) and is hingedly fastened to/mounted on the flange (2) so as to move from a closed position in which the door (4) closes the passage opening (3), into an open position, characterized in that the door (4) is fastened to the flange (2) by a double-joint linkage mechanism (5) comprising a first joint (6) arranged to allow a rotational movement about an axis (A) perpendicularly to the axis (C) of the door by a maximum of 30 degrees in relation to the plane of the passage opening (3), and a second joint (7) arranged to allow a rotational movement about an axis (B) parallel to the axis (C) of the door.

The invention relates to a door assembly (1) allowing a sealed transfer between two enclosed volumes, comprising a flange (2) arranged to delimit an opening in one of the enclosed volumes, and a door (4) that extends along an axis (C) and is hingedly fastened to/mounted on the flange (2) so as to move from a closed position in which the door (4) closes the passage opening (3), into an open position, characterized in that the door (4) is fastened to the flange (2) by a double-joint linkage mechanism (5) comprising a first joint (6) arranged to allow a rotational movement about an axis (A) perpendicularly to the axis (C) of the door by a maximum of 30 degrees in relation to the plane of the passage opening (3), and a second joint (7) arranged to allow a rotational movement about an axis (B) parallel to the axis (C) of the door.

The invention relates to a device for sealed transfer between two enclosed volumes, comprising a first flange and a second flange (10) which define a passage opening into the enclosed volumes and can be secured to each other by a first bayonet connection, a first door and a second door (11) which close off the passage openings and can be secured to each other by a second bayonet connection, the first door (11) being hingedly mounted on the first flange (10) by means of a hinge (4) comprising a hinge pin, characterized in that the device comprises an external manual control lever (9) which is secured to a rotary pin penetrating the first flange (10) and which is coupled to the hinge pin in such a way that the actuation of the control lever (9) drives the hinge pin, thus opening or closing the first door (11).

The invention relates to a device for sealed transfer between two enclosed volumes, comprising a first flange and a second flange (10) which define a passage opening into the enclosed volumes and can be secured to each other by a first bayonet connection, a first door and a second door (11) which close off the passage openings and can be secured to each other by a second bayonet connection, the first door (11) being hingedly mounted on the first flange (10) by means of a hinge (4) comprising a hinge pin, characterized in that the device comprises an external manual control lever (9) which is secured to a rotary pin penetrating the first flange (10) and which is coupled to the hinge pin in such a way that the actuation of the control lever (9) drives the hinge pin, thus opening or closing the first door (11).

The invention relates to a device for a sealed connection between two doors (2, 5) which are each provided with a coaxial complementary flange (3, 7), one of the doors (5) and the flange (3) of the other door (2) being provided with at least one peripheral seal (1, 4), wherein each of the peripheral seals (1, 4) comprises an annular seal body extended in the outer peripheral portion thereof by an annular bead (11, 41), and wherein the door and the flange having the seals comprise a tubular bearing surface (34, 54) that is complementary to the outer peripheral face (11, 44) of the seal body on the one hand and a circular groove for engagement with the bead on the other hand.

The invention relates to a device for a sealed connection between two doors (2, 5) which are each provided with a coaxial complementary flange (3, 7), one of the doors (5) and the flange (3) of the other door (2) being provided with at least one peripheral seal (1, 4), wherein each of the peripheral seals (1, 4) comprises an annular seal body extended in the outer peripheral portion thereof by an annular bead (11, 41), and wherein the door and the flange having the seals comprise a tubular bearing surface (34, 54) that is complementary to the outer peripheral face (11, 44) of the seal body on the one hand and a circular groove for engagement with the bead on the other hand.

The invention relates to a sealed transfer device between two enclosed volumes, comprising two flanges (10, 20) that can be secured to each other by a first bayonet connection, two doors (11, 21) which close off the passage openings defined by the flanges and can be secured to each other by a second bayonet connection, and a control mechanism comprising a control member (3) that is movably mounted on the first flange (10) between a closed position and an open position of the doors (11, 21), characterized in that the control mechanism comprises a member (7) for locking the second door (21) to the first door (11), ensuring that the doors are locked together when the control member (3) switches into the open position of the first and second doors, said locking member (7) being integrated into the first door (11).

An apparatus for sealing a vacuum tank door. The apparatus comprises a circular flange attached to a door panel of a vacuum tank, a horizontal crossbar connected to the center of the door panel and a lifting assembly. The lifting assembly comprises an upper linkage arm, a lower linkage arm, and a hydraulic cylinder. Activation of the hydraulic cylinder causes the linkage assembly to move downwards pulling on the horizontal crossbar and pulling the vacuum tank door towards the tank. Activation of the hydraulic cylinder also causes a connection point of the lower linkage arm and the upper linkage arm to move over-center of the connection between the lower linkage arm to the to the tank creating a tight seal between the vacuum tank door and the tank.