The invention relates to a sliding security gate inside a pocket attached to an interior pre-hung hinged door. These pocket sliding security gates can be assembled inside any doorway opening of one's home for the protection of babies, toddlers, pets, and disabled elderly. On one hand, the Pre-Hung Hinged Door and Pocket Sliding Security Gate can be used as a dual functioned component that can be used in a normal setting to provide privacy; on the other hand, the Pre-Hung Hinged Door and Pocket Sliding Security Gate can be used as a half door that is assembled as a pocket sliding security gate to provide safety and security to the vulnerable population listed above. In addition, this pocket sliding security gate also has an alarm attached to the security gate so that when it opens, the alarm sounds to let the gatekeeper know that the security has been breached.

The invention relates to a sliding security gate inside a pocket attached to an interior pre-hung hinged door. These pocket sliding security gates can be assembled inside any doorway opening of one's home for the protection of babies, toddlers, pets, and disabled elderly. On one hand, the Pre-Hung Hinged Door and Pocket Sliding Security Gate can be used as a dual functioned component that can be used in a normal setting to provide privacy; on the other hand, the Pre-Hung Hinged Door and Pocket Sliding Security Gate can be used as a half door that is assembled as a pocket sliding security gate to provide safety and security to the vulnerable population listed above. In addition, this pocket sliding security gate also has an alarm attached to the security gate so that when it opens, the alarm sounds to let the gatekeeper know that the security has been breached.

Apparatus allowing ventilation through a ventilation shaft to an underground ventilation duct fluidly communicating through the ventilation shaft to an atmospheric opening of the shaft and on threat of flooding operable to prevent downward flow of surface water into the underground ventilation duct includes one or more hinged panels closing a ventilation passage between the top and bottom of a support fitting in the shaft to prevent flooding. The panels have handles on their topside and pivotable arms on their underside and are liftable to an upright home position allowing ventilation, using tools to reach through grating covering openings on the shaft and lift the panel handles and after the panels are partially lifted, using reach tools to engage and lift the arms to press them again support sidewalls to exert lateral force on underside of the panels to complete upward rotation to the home position.

A safety gate is configured to be mounted at a gateway and has a frame and a gate body. The frame is configured to be mounted between two walls disposed at two sides of the gateway. The frame has two sides and two first positioning assemblies respectively disposed at the two sides of the frame. The gate body is disposed in the frame and has two sides and two first pivot assemblies respectively disposed at the two sides of the gate body. The first pivot assembly at each side of the gate body is configured to detachably and pivotally connect with the first positioning assembly at a respective one of the sides of the frame.

A collapsible gate may provide a temporary barrier to prevent movement between rooms, or to prevent access to a staircase, in a home or commercial building. The collapsible gate may be secured to framing material within a wall and adapted for storage within a wall cavity, such as a pocket door frame, when not in use. The collapsible gate may be vertically retractable and adapted to fit between two framing studs to stow within a wall cavity and out of sight. The collapsible gate may include a counterbalance to maintain the gate within the wall cavity when the gate is in the fully open position, and to assist in opening the gate when the gate is lifted from a closed position.

Apparatus allowing ventilation through a ventilation shaft to an underground ventilation duct fluidly communicating through the ventilation shaft to an atmospheric opening of the shaft and on threat of flooding operable to prevent downward flow of surface water into the ventilation duct includes support sidewalls fitting in the shaft providing a ventilation passage between support top and bottom openings and a suspension member supported on opposed lateral sidewalls proximate the top opening holding one or more hinge connected panels that manually release to rotationally close the passage and are manually rotationally liftable to a home position allowing ventilation. A panel drain automatically closes when the panel is raised to home position so it is already closed when the panel is released to rotationally close the passage.

Apparatus allowing ventilation through a ventilation shaft to an underground ventilation duct fluidly communicating through the ventilation shaft to an atmospheric opening of the shaft and on threat of flooding operable to prevent downward flow of surface water into the ventilation duct includes support sidewalls fitting in the shaft providing a ventilation passage between support top and bottom openings and a suspension member supported on opposed lateral sidewalls proximate the top opening holding one or more hinge connected panels that manually release to rotationally close the passage and are manually rotationally liftable to a home position allowing ventilation. A releasable latching system between panel and a suspension member holder catches rising panels to hold them in home position ready for release.

Apparatus allowing ventilation through a ventilation shaft to an underground ventilation duct fluidly communicating through the ventilation shaft to an atmospheric opening of the shaft and on threat of flooding operable to prevent downward flow of surface water into the underground ventilation duct includes support sidewalls fitting in the shaft providing a ventilation passage between support top and bottom openings and a suspension member supported on opposed lateral sidewalls unobstructively horizontally spanning the passage proximate the top opening and holding one or more hinge connected panels in the passage that manually release to rotationally close the passage and prevent flooding and are manually rotationally liftable to a home position allowing ventilation. The suspension member is liftingly removable from the support and may include end keys received in keyed supports to allow the suspension member to fit in the supports so a specific panel closes to a specific sidewall.

A flood-protective ventilation louver includes a window frame assembly, slat assemblies, a transmission mechanism, and a buoyance switch assembly. During flooding, external water passes through the window frame assembly into the buoyance switch assembly, such that the buoyance switch assembly is caused to release the transmission mechanism from constraint to thereby allow the slat of each of the slat assemblies to oscillate downward automatically and thus automatic closing is realized.

A flood-protective ventilation louver includes a window frame assembly, slat assemblies, a transmission mechanism, and a buoyance switch assembly. During flooding, external water passes through the window frame assembly into the buoyance switch assembly, such that the buoyance switch assembly is caused to release the transmission mechanism from constraint to thereby allow the slat of each of the slat assemblies to oscillate downward automatically and thus automatic closing is realized.