A pet access control system according to various aspects of the present technology may comprise a door unit interoperable with a security panel holder. The door unit covers a passage through a structure, such as through the wall or door of a building. The door unit may include a connector that may be mounted on a legacy security panel holder or a dedicated mounting system for the door unit. The door unit may operate in conjunction with a pet identification system to automatically identify and grant access only to authorized pets.

A pet access control system according to various aspects of the present technology may comprise a door unit interoperable with a security panel holder. The door unit covers a passage through a structure, such as through the wall or door of a building. The door unit may include a connector that may be mounted on a legacy security panel holder or a dedicated mounting system for the door unit. The door unit may operate in conjunction with a pet identification system to automatically identify and grant access only to authorized pets.

A fitting assembly has a device for securing against operating errors that has a first protrusion which can be moved relative to a second protrusion by means of a first operating rod assembly. A buffer can be provided between the end sides of the first protrusion and the second protrusion. The first protrusion can be a cylinder and/or the second protrusion can extend in an elongated manner. The fitting assembly can have an anti-lifting device with a third protrusion which prevents a lifting of the first leaf. The fitting assembly has multiple carriages and multiple sliders in order to position leaves of the window or the door into their slide position in parallel with the main plane of the window or the door. In the blocking position, the leaves can be pressed against a fixed frame of the window or the door via the fitting assembly with multiple carriages and multiple sliders, in order to reliably seal the window or the door.

A refrigerator includes a body defining a storage compartment therein, a first door hingedly provided at the body so as to open and close the storage compartment, the first door including a door frame having a hinge hole formed therein, and a second door hingedly provided at the first door by means of a hinge, the second door including a lateral side surface, the lateral side surface being at least partially fitted into the door frame, wherein the hinge includes a hinge shaft disposed in the first door so as to define a rotational center of the second door, a hinge bracket coupled to the second door, and an indented member provided between the hinge shaft and the hinge bracket, the indented member being moved through the hinge hole so as to allow the entire second door to escape from the door frame when the second door is opened.

A refrigerator with an enhanced door includes a main body including a storeroom, first and second doors pivotally coupled to the main body to open or close the storeroom and a pivot bar pivotally installed at the first door. The pivot bar is movable between a first position between the first and second doors and a second position pivoted toward the first door to prevent cold air leaks from the storeroom. A locking device separably locks the pivot bar to the first door when the pivot bar is in the second position.

A system is disclosed for converting an overhead door into a gate or serving window, the system having at least two rows of panels spanning the width of the door, one panel located above and adjacent to the other panel, a pair of rails opposite one another and adjacent to the panels, the panels traveling within the rails to move from a closed position to an open position, and at least one hinge connecting the lower row of panels to the upper row of panels, the hinge having an upper half attached to the upper row of panels and a lower half attached to the lower row of panels, the upper and lower halves of the hinge connected by a removable central pin, wherein the upper row of panels moves from the closed position to the open position when the central pin is removed from the hinge.

A vehicle includes a body structure defining a front trunk having a front opening. A grille coves the front opening in a closed position and is pivotable about a vertical hinge, or a horizontal hinge along a top edge, secured to the body structure to provide access to the front opening. The grille may include a bin mounted on an inner surface of the grille and pivotable with the grille, a heating/cooling duct or a video display.

A vehicle includes a body structure defining a front trunk having a front opening. A grille coves the front opening in a closed position and is pivotable about a vertical hinge, or a horizontal hinge along a top edge, secured to the body structure to provide access to the front opening. The grille may include a bin mounted on an inner surface of the grille and pivotable with the grille, a heating/cooling duct or a video display.

A personnel access door assembly of an opposing wing of a mine ventilation door. The personnel access door includes a frame including a top portion, a bottom portion, a first post portion and a second post portion, the top frame portion and the bottom frame portion coupled to respective top and bottom ends of the first post and second post portions. The personnel access door further includes sets of trolley wheels affixed to the top or bottom of the frame to engage a top rail or bottom rail affixed on the opposing wing.

A refrigerator includes a body defining a storage compartment therein, a first door hingedly provided at the body so as to open and close the storage compartment, the first door including a door frame having a hinge hole formed therein, and a second door hingedly provided at the first door by means of a hinge, the second door including a lateral side surface, the lateral side surface being at least partially fitted into the door frame, wherein the hinge includes a hinge shaft disposed in the first door so as to define a rotational center of the second door, a hinge bracket coupled to the second door, and an indented member provided between the hinge shaft and the hinge bracket, the indented member being moved through the hinge hole so as to allow the entire second door to escape from the door frame when the second door is opened.