A door comprises a framework formed from lengths of pultruded synthetic material having a low coefficient of thermal expansion, the space defined by the framework may be at least partially occupied by a core comprising a body of synthetic, structural-density, foam material and skins may be secured to opposed faces thereof to leave edges of the framework exposed.

A light weight door for a caravan is made as a sandwich from two panels with an infilling of a wooden frame consisting of rails and stiles which are not jointed together, and with blocks of expanded polystyrene filling the spaces between the rails and stiles, these blocks being initially thicker than that of the wooden frame parts, and all of the parts being bonded together so that the blocks become compressed. The bonding makes the door concave convex at the latch edge but planar at the hinge e...

A door system for a shed for the building of a ship by the so-called extrusion method comprising two door arrangements disposed one behind the other in a doorway opening in one end wall of the shed, one of said door arrangements being openable upwardly to an adjustable extent to define an aperture which extends over the full width of the doorway opening and which is of desired height from the ground to the lower edge of the door arrangement, and the other of said door arrangements being comprise...

A solid door for a dwelling, the door combining the features of security, ventilation and insect protection. The door has an aperture covered by a security grill and an insect screen. A sliding panel is fitted to the side of the door facing the interior of the dwelling so that the panel can close the aperture, or be opened to allow ventilation while still maintaining security and the exclusion of insects from the building.

A structural panel, such as an appliance door, includes first and second frame members each having inner and outer peripheral edges with the inner peripheral edges each defining an opening. At least one of the frames is constructed from synthetic polymeric/copolymeric material. A glass panel has an outer peripheral edge in sandwiched relationship with at least one annular member inner peripheral edge thereby closing the opening thereof, and the two frames are secured together. A second glass pan...

A lock for doors, for example doors of homes, offices, hotel rooms or similar, as well as doors of motor vehicles, includes a lock opening control assembly having a control device located at a distance from the lock and a mechanical transmission connecting the control device to the lock. A shape memory actuator is arranged in between the mechanical transmission, so that the lock can be opened both by operating the shape memory actuator, and by operating the control device, in which case the shap...

An overhead door is provided with a pair of stays and respective stay holding tension springs arranged such that, when the door is closed, they are expanded only less than twice of their length so that they are not subjected to excessive loads and hence can have a prolong service life. Each of the stays is rotatably fitted to the inner surface of a corresponding lateral wall of a cabinet main body by way of a rotary shaft and have its front end pivotably secured to the door at a position close t...

A hinge, comprising at least one first element which is fastenable to an upright member and a second element which is fastenable to a plurality of rolling bodies interposed between the first element and second element, the rolling bodies rolling along a first annular track and a second annular track respectively provided on the first element and the second element, each of said tracks having a bottom portion and two side portions, wherein the side portions are extended for retaining the rolling ...

Fiberboard doors and methods for constructing the same are shown. Doors are constructed by assembling fiberboard stiles and fiberboard rails to form door-halves and then by bringing the door-halves together. The doors may be constructed to have one or more panels, mullions and intermediate rails. The doors may also be of standard or decorative design, and include panels made of glass or other materials.

In a door and door frame construction the door is hinged to the frame by one or more hinged structures, each hinged structure comprising a convex-surfaced support associated with the door and a convex-surfaced support associated with the door frame, at least two resilient strip-like S-shaped hinge members passing partially round each support and together with the other member forming a letter x or figure 8 configuration as seen in a direction along the supports, respective means being provided f...