A spring assisted overhead door is disclosed. An overhead door is movable between an open and a closed position. In the open position the overhead door is in a horizontal orientation and rests on a track that is also horizontal. Weight of the door in this position may be insufficient to initiate downward movement of the overhead door. A spring is used to urge the overhead door along the track until a release point at which point the overhead door is at least partially on a downwardly oriented portion of the track where gravity can pull the overhead door along the track.

A vehicle includes a chassis, a door track, a door operatively connected to the door track and adapted to move between a closed position and an open position, and a hinge assembly coupled to the door. The hinge assembly is movably coupled to the door track and includes a first bracket coupled to the door, a second bracket coupled to the first bracket, and a transport assembly coupled to the second bracket and adapted to move along the door track as the door moves between the open and closed positions. The transport assembly includes a coupling member for releasably coupling the second bracket to the transport assembly. Upon movement of the second bracket from the first position to the second position, the door moves to an extended open position with respect to the door track.

A vehicular door device includes a door-side engagement portion including a guide groove that includes a pair of side wall portions facing each other in a vehicle width direction and extends in an opening-closing operation direction of the door, a vehicle body-side engagement portion including a shaft-shaped engagement portion extending in an up-down direction of a vehicle, and an expansion mechanism provided in a second link arm. In an opening-closing operation position near a full closed position of the door where the door-side engagement portion and the vehicle body-side engagement portion engage with each other, the shaft-shaped engagement portion is disposed in the guide groove. The shaft-shaped engagement portion is relatively displaced along an extending direction of the guide groove while a change in length of the second link arm, based on an operation of the expansion mechanism, is accompanied, and thus the door can perform an opening-closing operation.

A vehicular door device includes a door-side engagement portion including a guide groove that includes a pair of side wall portions facing each other in a vehicle width direction and extends in an opening-closing operation direction of the door, a vehicle body-side engagement portion including a shaft-shaped engagement portion extending in an up-down direction of a vehicle, and an expansion mechanism provided in a second link arm. In an opening-closing operation position near a full closed position of the door where the door-side engagement portion and the vehicle body-side engagement portion engage with each other, the shaft-shaped engagement portion is disposed in the guide groove. The shaft-shaped engagement portion is relatively displaced along an extending direction of the guide groove while a change in length of the second link arm, based on an operation of the expansion mechanism, is accompanied, and thus the door can perform an opening-closing operation.

Aircraft door designed to assume a first configuration and a second configuration, having a bistable mechanism biasing the aircraft door towards either the first or second configuration, the bistable mechanism including: a first yoke having a base attached to the first member and a first pivot rotatably mounted on the bas; a second yoke having: a base attached to the first member; a lever a first end of which is mounted so as to pivot on the base; a second pivot mounted so as to rotate on the second end of the lever; a coupling device for coupling the lever to the second member of the door; an arch which can be elastically deformed by bending and a first end of which is attached to the first pivot and a second end attached to the second pivot.

A side-open left-right-door arbitrary-opening structure of a refrigerator comprises four hinge shafts are fixedly connected at left and right sides of a refrigerator body in pairs respectively, left and right sides of upper and lower end faces of a refrigerator door are all provided with an opening neck, each hinge shaft is correspondingly placed in one opening neck, four hinge shaft stoppers are slidably arranged on the upper and lower end faces of the refrigerator door in pairs respectively, one spring is arranged between two hinge shaft stoppers in each pair, tail ends of the hinge shaft stoppers on the upper and lower end faces of the refrigerator door extend into the opening necks at the corresponding sides, and the hinge shafts at the corresponding sides are positioned in the opening necks.

An apparatus for automatically opening and closing a trunk lid includes a drum member connected to a first cable and rotatably coupled to a drum bracket fastened to a hinge arm, a power latch cinching actuator including an output gear configured to be rotated by a motor embedded in a housing, and an elastic spring having a first end coupled to the drum member and a second end configured to be coupled to the trunk lid, wherein the first cable is coupled to the output gear and is configured to rotate the drum member in a first direction when the output gear is rotated.

A furniture fitting includes a mounting device for releasably fastening the furniture fitting to one of two furniture parts, an actuating device which can be connected to the other of the two furniture parts and which is mounted so as to be movable relative to the mounting device, an energy accumulator which has a spring element formed from a wire, an the spring element is designed as a coil spring, and a force transmission mechanism by which energy which can be deposited in the energy accumulator can be transmitted to the actuating device. The wire has, in a cross-section normal to a longitudinal axis of the at least one wire, an outer contour which deviates from a circular shape.

A lifting apparatus (100) includes a connector assembly (110) with a first connecting member (120), a second connecting member (130) and a connecting link (140), the first and second connecting members (120, 130) configured to be pivot-mounted at first ends (122, 132) to a first stationary component (200), and a pneumatic supporting member (150) is coupled to the first and second connecting members (120, 130) via the connecting link (140). The connector assembly (110) and the pneumatic supporting member (150) are configured to perform a lifting motion, wherein, when performing the lifting motion, the first and second connecting members (120, 130) transition from a first position (P1) to a second position (P2) and the pneumatic supporting member (150) transitions from an extended position (EP) to a compressed position (CP).

In a high-security sliding-door apparatus for closing and opening a corridor, the door having (a) a door frame having a track and a bi-directional effector, (b) a carriage having track-engaging rollers, (c) a slide plate slidably secured to the carriage and driven by the effector, and (d) a controller controlling slide-plate movement and enabling the door to be continuously closed but not locked, the improvement comprising centering apparatus for relative positioning of the slide plate and carriage, the centering apparatus including (1) a yoke attached to the slide plate at a yoke pivot and having a yoke cam surface thereabove, (2) a carriage-attached yoke-cam follower, and (3) springs having proximal ends attached to the yoke spaced above the yoke pivot and distal ends each attached to the carriage at points offset from the yoke pivot in opposite lateral directions, centering the door with the slide plate when unlocked.