A balance system used with a door of a cupboard comprises a transmission shaft, a first pulley on the transmission shaft, and a balance component. The first pulley is connected to a door belt, one end of the door belt is secured to the first pulley, and the other end of the belt is connected to the door. The balance component comprises a balancing member, a balancing belt and a second pulley on the transmission shaft. One end of the balancing belt is connected to the second pulley, and the other end of the balancing belt is connected to the balancing member, such that the balancing member is hung on the second pulley. The first pulley and the second pulley rotate synchronously, and the door belt and the balancing belt are wound oppositely. With the balance system, a small driving force can open/close the door.

A latch assembly connected to the drive unit of a bi-fold door for retaining the bi-fold door secure to a building has elongated straps attached to rotatable latch drums mounted on the outer ends of the drive shaft of the drive unit. Lift drums powered by a motor driven gearbox raise and lower the bi-fold door. Latch assemblies having springs attached to the straps maintain tension on the straps during the opening and closing of the bi-fold door.

A latch assembly connected to the drive unit of a bi-fold door retains the bi-fold door in engagement with upright columns of a building with elongated straps attached to the upright columns and rotatable latch drums mounted on a drive shaft of a drive unit. Lift devices powered by the drive unit raise and lower the bi-fold door. Latch assemblies include springs that maintain tension on the straps during the opening and closing of the bi-fold door.

An overhead bi-fold door mounted on a freestanding header has a door lift device with polymer cylindroids and capstans operated with an electric motor driven power transmission to selectively move the bi-fold door from an upright closed position to a folded open position and allow the bi-fold door to move from the folded open position to the upright closed position. Anchors mounted on the bi-fold door adjust the working length of the cylindroids between the capstans and anchors. The capstans have laterally spaced disks engageable with the cylindroids during the helical winding and unwinding of the cylindroid on the capstans as the bi-fold door moves at an increasing rate of speed from the upright closed to folded open positions and a decreasing rate of speed from the folded open to upright closed positions.

A flap fitting includes a setting arm attached to a base element so as to be pivotable about a setting axis between an open position and a closed position, a toggle lever mechanism having a first lever and a second lever connected to each other pivotably about a pivot axis, and an energy accumulator. The energy accumulator acts on the first lever at a first link point spaced from the pivot axis and on the second lever at a second link point spaced from the pivot axis. Also, the first link point and the second link point are acted upon by the energy accumulator with force towards one another. A setting contour arrangement with a setting contour and a guide element is arranged between the first lever and the setting arm and the guide element is movable along the setting contour. The setting arm is forcedly loaded in the direction of rotation about the setting axis at least in a partial section along the setting contour by the first lever via the setting contour arrangement.

A flag angle includes: a body having a two ends, and a middle section located between the ends; a mounting portion on the body for mounting the body to a surface; a first wider portion located at one end, the first wider portion extending further away from the mounting portion than an amount the middle section extends from the mounting portion; a second wider portion located at the other end, the second wider portion extending further away from the mounting portion than the amount the middle section extends away from the mounting portion; first, second, third, and fourth attaching features located on the first wider portion and each of the second, third, and fourth attaching features are located progressively further away from the mounting portion; and fifth and sixth attaching features located on the second wider portion, wherein the attaching features include slots and holes.

A folding wall partition includes foldable panel assemblies. Each panel assembly includes an upper panel and a lower panel. The upper and lower panels extend substantially in a common vertical plane when in a deployed position, and extend laterally outwardly of the common vertical plane in a stacked relationship when in a stored position. A moving mechanism engages the panel assemblies to displace them between the stored and deployed positions. A cover assembly has cover panels. The cover panels extend in a first common horizontal plane when in the deployed position and are substantially coplanar with the ceiling to conceal a cavity. The cover panels extend in a second common horizontal plane higher than the first common horizontal plane and within the cavity when the cover panels are in the stored position.

Disclosed are a support device and a folding furniture having the support device. The support device includes a base, a support mechanism, a fixed seat, and a force providing mechanism installed to the base. The support mechanism includes a support element and a rotating element rotatably installed to the base. The support assembly has an end hinged to the fixed seat and the other end having a disassembling structure for detachably connecting the rotating element. The rotating element abuts the force providing mechanism, and the force providing mechanism is provided for supporting the rotating element. The support device has an ingenious structural design, so that the support element and the rotating element can be installed or removed conveniently, and the operation is simple and labor-saving, and the lifting operation of the support element has the features of stable operation, low noise, and high practicality.

A latch assembly connected to the drive unit of a bi-fold door for retaining the bi-fold door secure to a building has elongated straps attached to rotatable latch drums mounted on the outer ends of the drive shaft of the drive unit. Lift drums powered by a motor driven gearbox raise and lower the bi-fold door. Latch assemblies having springs attached to the straps maintain tension on the straps during the opening and closing of the bi-fold door.

A latch assembly connected to the drive unit of a bi-fold door for retaining the bi-fold door secure to a building has elongated straps attached to rotatable latch drums mounted on the outer ends of the drive shaft of the drive unit. Lift drums powered by a motor driven gearbox raise and lower the bi-fold door. Latch assemblies having springs attached to the straps maintain tension on the straps during the opening and closing of the bi-fold door.