A bi-fold door is opened with a lift assembly having a plurality of straps attached to power driven lift drums. A latch assembly retains the closed bi-fold door secure to side columns of a building. The latch assembly has a latch strap attached to a latch drum that accommodates the latch strap to hold the closed bi-fold door in contact with the side columns of the building. A floor anchor assembly anchors the bottom of the closed bi-fold door to the floor below the closed bi-fold door to stabilize and inhibit bending and deformation of the bi-fold door frame.

A sash (62) of a window opening up to 180 and capable of tilting is mounted onto a fixedly installed frame profile (63) and houses a pair of superimposing sashes that fit tightly therein when in closure position, i.e. an upper stationary sash (65) and a lower movable-divertible sash (64), each of the sashes (64,65) provided with laterally extending shafts (49) for connection with sash (62), roller wheels (50) provided onto the shafts (49) of sash (64) that roll within a predefined path created by insert guide profile members (19) and diverter guide members (66,68) to alternately bring sash (64) in a position of superimposing sash (65) and a position of alignment with the same. Lifting mechanisms (46) provided with a regulatory screw (84) for adjusting the pretension of a spring component thereof and thereby the force required by the user for moving the sash (64) are installed within the vertically extending sides of the sash (62).

A window balance assembly may include a carrier, a spring element, and a mounting bracket. The spring element may include first and second portions. The first portion may be coupled to the carrier. The mounting bracket may engage the second portion of the spring element and may selectively engage the carrier.

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 sash (62) of a window opening up to 180 and capable of tilting is mounted onto a fixedly installed frame profile (63) and houses a pair of superimposing sashes that fit tightly therein when in closure position, i.e. an upper stationary sash (65) and a lower movable-divertible sash (64), each of the sashes (64,65) provided with laterally extending shafts (49) for connection with sash (62), roller wheels (50) provided onto the shafts (49) of sash (64) that roll within a predefined path created by insert guide profile members (19) and diverter guide members (66,68) to alternately bring sash (64) in a position of superimposing sash (65) and a position of alignment with the same. Lifting mechanisms (46) provided with a regulatory screw (84) for adjusting the pretension of a spring component thereof and thereby the force required by the user for moving the sash (64) are installed within the vertically extending sides of the sash (62).

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.

Embodiments of the present invention provide improvements to printers including the use of engineered structures to limit bending, flexing, and/or twisting during impacts and the use of impact absorbing materials to prevent cracks and breaks. Design features and materials add to the rigidity of the printer design to prevent twisting and flexing during impacts and add to the strength of the printer design in typical breakage areas. For example, embodiments provide improvements that strengthen traditional break areas by the use of improved materials and design optimization to distribute impact forces. Embodiments allow the printer to maintain an operational status following a drop test and/or a tumble test.

A counterbalance assembly for use with an overhead door assembly of a trailer, for example, includes a first counterbalance mechanism having a first adjustment mechanism for adjusting a tension force of the first counterbalance mechanism and a second counterbalance mechanism having a second adjustment mechanism for adjusting a tension force of the second counterbalance mechanism. The first and second counterbalance mechanisms are spaced-apart from each other.

A removable balance system for a sash movable vertically between a pair of window jambs. The balance system includes a U-shaped balance channel member and a double block and tackle system disposed within the U-shaped balance channel with a locking feature selectively operable between extending laterally outwardly from the shoe for engagement with an opening in the jamb channel and recessed within the shoe. In operation the locking feature is inserted into an upper most opening in the jamb channel and the cord of the double block and tackle is withdrawn to an extent sufficient for the locking feature to engage a second opening in the jamb channel thereby securing the balance system in place within each jamb providing a seat for the sash atop the two laterally disposed shoes.

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.