A package delivery box 100 is disclosed. It comprises a container 101 for accommodating at least one package, an openable lid 102 attached to the container 101, a closing mechanism for closing the container 101, and a locking mechanism for locking the closed container 101. The closing mechanism comprises a pressure plate 103 at a base of the container 101, a string 105 connecting the pressure plate 103 with the lid, and at least one pull spring 106 between the lid 102 and the container 101, and the locking mechanism comprises a flexible rod 104 beneath the pressure plate 103 and directly connected to the pressure plate 103, a slider 109 connected to the flexible rod, and a hole 110 in the lid, wherein the hole 110 is adapted to accommodate insertion of the flexible rod 104 therein.

A package delivery box 100 is disclosed. It comprises a container 101 for accommodating at least one package, an openable lid 102 attached to the container 101, a closing mechanism for closing the container 101, and a locking mechanism for locking the closed container 101. The closing mechanism comprises a pressure plate 103 at a base of the container 101, a string 105 connecting the pressure plate 103 with the lid, and at least one pull spring 106 between the lid 102 and the container 101, and the locking mechanism comprises a flexible rod 104 beneath the pressure plate 103 and directly connected to the pressure plate 103, a slider 109 connected to the flexible rod, and a hole 110 in the lid, wherein the hole 110 is adapted to accommodate insertion of the flexible rod 104 therein.

Embodiments of the present invention are related to an improved gate hinge with a post assembly including an L-Bracket, a post assembly extension, and a swing axis bolt with a T-Joint. A gate assembly includes an L-Bracket and gate assembly extension. The post assembly and gate assembly are connected via connecting bolt. The swing axis bolt is oriented vertically on the post assembly extension and the connecting bolt is oriented horizontally on the gate assembly extension. The connecting bolt connects the gate assembly to the post assembly at the T-Joint. The gate assembly extension rotates via the T-Joint on the swing axis bolt. The post assembly extension distally extends a bottom portion of a gate attached to the gate assembly relative to a top portion of the gate. The distal extension creates an elevated angle between the gate bottom and ground when the improved gate hinge is actuated.

A package delivery box 100 is disclosed. It comprises a container 101 for accommodating at least one package, an openable lid 102 attached to the container 101, a closing mechanism for closing the container 101, and a locking mechanism for locking the closed container 101. The closing mechanism comprises a pressure plate 103 at a base of the container 101, a string 105 connecting the pressure plate 103 with the lid, and at least one pull spring 106 between the lid 102 and the container 101, and the locking mechanism comprises a flexible rod 104 beneath the pressure plate 103 and directly connected to the pressure plate 103, a slider 109 connected to the flexible rod, and a hole 110 in the lid, wherein the hole 110 is adapted to accommodate insertion of the flexible rod 104 therein.

A package delivery box 100 is disclosed. It comprises a container 101 for accommodating at least one package, an openable lid 102 attached to the container 101, a closing mechanism for closing the container 101, and a locking mechanism for locking the closed container 101. The closing mechanism comprises a pressure plate 103 at a base of the container 101, a string 105 connecting the pressure plate 103 with the lid, and at least one pull spring 106 between the lid 102 and the container 101, and the locking mechanism comprises a flexible rod 104 beneath the pressure plate 103 and directly connected to the pressure plate 103, a slider 109 connected to the flexible rod, and a hole 110 in the lid, wherein the hole 110 is adapted to accommodate insertion of the flexible rod 104 therein.

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. A releasable latching system between panel and a suspension member holder catches rising panels to hold them in home position. The suspension member may include end keys received in keyed supports so a specific panel faces a specific sidewall.

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.

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.