A drop down seal (1) comprising a channel-shaped external support profile (E10) suitable to be fixed to the base of the door or window panel, a rod-shaped support element (12), which is slidably housed in the support profile and a movable element (16) connected to the support element by means of a parallelogram articulation mechanism (18) suitable to allow the movable element (16) to move in height between a raised rest position and a lowered working position, said movable element, when in the rest position, also being operationally and removably connected to the support profile (10). The support element (12), at one of the proximal ends thereof, forms, or is provided with, a laterally protruding control portion (22) suitable to be engaged by a trigger base (2) fixed to the abutment surface.

A drop down seal (1) comprising a channel-shaped external support profile (E10) suitable to be fixed to the base of the door or window panel, a rod-shaped support element (12), which is slidably housed in the support profile and a movable element (16) connected to the support element by means of a parallelogram articulation mechanism (18) suitable to allow the movable element (16) to move in height between a raised rest position and a lowered working position, said movable element, when in the rest position, also being operationally and removably connected to the support profile (10). The support element (12), at one of the proximal ends thereof, forms, or is provided with, a laterally protruding control portion (22) suitable to be engaged by a trigger base (2) fixed to the abutment surface.

Systems and methods for providing a drop seal assembly which is concealed within an opening in the bottom of a sliding door panel of a top-hanging sliding door. The drop seal assembly may include bottom guide which defines a downward facing elongated slot or track which receives a sill guide therein. The drop seal assembly also includes a drop down acoustic seal which automatically drops down to contact the floor surface below the door panel when the door panel is moved from an open position into a closed position. The distance that the seal drops down upon closing of the door panel may be selectively adjustable to accommodate variances in the air gap between the door bottom and the floor surface due to particular installation conditions. A concealed magnetic bottom seal activator may be used to provide self-adjusting activation of the door bottom seal assembly using two opposing magnets.

Systems and methods for providing a drop seal assembly which is concealed within an opening in the bottom of a sliding door panel of a top-hanging sliding door. The drop seal assembly may include bottom guide which defines a downward facing elongated slot or track which receives a sill guide therein. The drop seal assembly also includes a drop down acoustic seal which automatically drops down to contact the floor surface below the door panel when the door panel is moved from an open position into a closed position. The distance that the seal drops down upon closing of the door panel may be selectively adjustable to accommodate variances in the air gap between the door bottom and the floor surface due to particular installation conditions. A concealed magnetic bottom seal activator may be used to provide self-adjusting activation of the door bottom seal assembly using two opposing magnets.

A sealing device of a sliding door having a slidably mounted door leaf has a drop-down seal having a sealing strip and a lowering mechanism for automatically lowering and raising the sealing strip. The lowering occurs against a restoring force. The sealing device also has an activation unit for activating the drop-down seal. The activation unit has a contact surface, which is directed upward in the lowering direction, and a contact element, which lies against said contact surface during the closing of the door leaf and thereby actuates the drop-down seal. In this way, the weight of the door leaf can be used for the lowering of the sealing strip. Furthermore, a position in which the restoring force does not influence a sliding motion of the door leaf in the longitudinal direction of the sealing strip can be achieved.

A sealing device of a sliding door having a slidably mounted door leaf has a drop-down seal having a sealing strip and a lowering mechanism for automatically lowering and raising the sealing strip. The lowering occurs against a restoring force. The sealing device also has an activation unit for activating the drop-down seal. The activation unit has a contact surface, which is directed upward in the lowering direction, and a contact element, which lies against said contact surface during the closing of the door leaf and thereby actuates the drop-down seal. In this way, the weight of the door leaf can be used for the lowering of the sealing strip. Furthermore, a position in which the restoring force does not influence a sliding motion of the door leaf in the longitudinal direction of the sealing strip can be achieved.

A pet door apparatus (10) discloses a pet door frame (12), an opening (34), and closure flap (36) which is rotatable for at least partly closing the opening or extending away from the opening. A magnet (102) and magnetically attractable element are respectively on one or the other of the flap and frame, and an actuator can move the magnet or magnetically attractable element to change the distance, and magnetic attraction force, between them. A blocking member (176) attached to a side part (28) of the frame is movable under gravitational force and due to engaging cam surfaces (196, 198), from an extended, raised position for partially closing a gap (160) between the flap and frame, to a retracted, lowered position, and back to the raised, extended position by magnetic attraction between a magnet (164) on the flap and another magnet (190) on the frame.

A sliding door system (105) includes a track assembly (120) and a door (125) slidably connected to the track. Seals (245, 250, 605, 610, 300, 500) disposed about the door limit sound and/or infectious materials from passing thereby. One or more of the seals (245, 250) are disposed between the door and the track assembly. One or more other seals (605, 610) are disposed between the door and a wall to seal around the trailing end of the door. The system may also include a door dock (130) with one or more seals (300, 500) to seal around the leading end of the door. The system can also include a drop seal assembly (700) that selectively seals off a gap between the bottom of the door and the floor.

A sliding door system (105) includes a track assembly (120) and a door (125) slidably connected to the track. Seals (245, 250, 605, 610, 300, 500) disposed about the door limit sound and/or infectious materials from passing thereby. One or more of the seals (245, 250) are disposed between the door and the track assembly. One or more other seals (605, 610) are disposed between the door and a wall to seal around the trailing end of the door. The system may also include a door dock (130) with one or more seals (300, 500) to seal around the leading end of the door. The system can also include a drop seal assembly (700) that selectively seals off a gap between the bottom of the door and the floor.

The present disclosure relates to an air tight door, and the air tight door according to the present disclosure is characterized to include a frame including a first longitudinal member disposed at each of both lateral sides and an upper side of an opening, and a second longitudinal member disposed at a lower side of the opening; a door that is rotatably connected to the first longitudinal member disposed at one side of the opening so as to open and/or close the opening; a first sealing that is disposed at each of the first longitudinal member of the frame, and that closely contacts the door in a state where the door has closed the opening; and a second sealing that is elevatably disposed at a lower end of the door, and that descends from the lower end of the door to closely contact an upper surface of the second longitudinal member in the state where the door has closed the opening; a locking device that fixes a position of the door in the state where the door has closed the opening; and an actuating device disposed at each of both surfaces of the door so as to unlock the locking device.