A door opening and closing device for a refrigerator includes a door coupled by means of a hinge unit to a main body defining a storage compartment therein, a gasket disposed between the door and the main body to provide a hermetic seal therebetween, and an opening and closing unit for opening and closing the door with respect to the main body, wherein the opening and closing unit includes a drive unit for generating a driving force, a gasket separation mechanism for pushing the main body using rotational force transmitted from the drive unit to separate the gasket from the main body or the door, and a door rotating mechanism for rotating the door using the rotational force transmitted from the drive unit.

The present disclosure relates to an air tight door including a frame having three frame members disposed, respectively, at a first lateral side, a second lateral side, and an upper side of an opening; and a longitudinal member disposed at a lower side of the opening. The door is rotatably connected to the frame member disposed at the first lateral side of the opening so as to open and/or close the opening. A first sealing disposed at each of the three frame members closely contacts the door in a closed state; and a second sealing elevatably disposed at a lower end of the door descends from the lower end of the door to closely contact the longitudinal member in the closed state. A locking device fixes a position of the door in the closed state; and an actuating device is configured to unlock the locking device.

The present disclosure relates to an air tight door including a frame having three frame members disposed, respectively, at a first lateral side, a second lateral side, and an upper side of an opening; and a longitudinal member disposed at a lower side of the opening. The door is rotatably connected to the frame member disposed at the first lateral side of the opening so as to open and/or close the opening. A first sealing disposed at each of the three frame members closely contacts the door in a closed state; and a second sealing elevatably disposed at a lower end of the door descends from the lower end of the door to closely contact the longitudinal member in the closed state. A locking device fixes a position of the door in the closed state; and an actuating device is configured to unlock the locking device.

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.

A sealing assembly for a door of a vehicle includes a housing provided on the door, a sealing slider retractably mounted in the housing, a drawing-out device for urging the sealing slider away from the housing, an inserting device for urging the sealing slider into the housing, and a weather strip for air-tight sealing with the sealing slider when the door is closed, where the drawing-out device includes an operating lever rotatably installed on the housing to push an end portion of the sealing slider away from the housing and a support to rotate the operating lever in response to closing of the door, where the sealing slider is slidably movable between a first door and a second door.

A sealing assembly for a door of a vehicle includes a housing provided on the door, a sealing slider retractably mounted in the housing, a drawing-out device for urging the sealing slider away from the housing, an inserting device for urging the sealing slider into the housing, and a weather strip for air-tight sealing with the sealing slider when the door is closed, where the drawing-out device includes an operating lever rotatably installed on the housing to push an end portion of the sealing slider away from the housing and a support to rotate the operating lever in response to closing of the door, where the sealing slider is slidably movable between a first door and a second door.

A secure sliding closure having a modular frame and one or more sliding door is described. The modular frame defines at least one secure cavity and a portal and comprises a main frame and at least one door frame. The main frame comprises at least one frame upright spaced apart from at least one portal upright and a respective at least one top plate extending between the at least one frame upright and the at least one portal upright. The at least one door frame comprising a locking side upright spaced apart from a secure cavity upright and a door frame top plate. The modular frame defines at least one secure cavity and defines a portal. The one or more sliding door comprises a sliding leaf and a sliding leaf covering, the covering comprising one or more sliding door security panel.

A secure sliding closure having a modular frame and one or more sliding door is described. The modular frame defines at least one secure cavity and a portal and comprises a main frame and at least one door frame. The main frame comprises at least one frame upright spaced apart from at least one portal upright and a respective at least one top plate extending between the at least one frame upright and the at least one portal upright. The at least one door frame comprising a locking side upright spaced apart from a secure cavity upright and a door frame top plate. The modular frame defines at least one secure cavity and defines a portal. The one or more sliding door comprises a sliding leaf and a sliding leaf covering, the covering comprising one or more sliding door security panel.

A threshold seal apparatus for a doorway, the threshold seal apparatus comprising a floor-mountable channel portion, a seal configured to be received within the channel portion, and an actuation mechanism operable to move the seal with respect to the channel portion between a retracted position and an extended position in which the seal is configured to contact the underside of a door mounted within the doorway.