The invention relates to a weight compensation device for a drive of a lifting door, for the position-dependent compensation of the weight force of a door leaf of the lifting door, with a force transmission unit which can be coupled to the drive in order to carry out an opening movement which raises the door leaf and a closing movement which lowers the door leaf, wherein at least one compression spring is provided which is arranged in such a way that it supports the opening movement. The invention also relates to a lifting door, in particular an industrial lifting door, which has a door leaf, with a drive, such as a motor, and with a weight compensation device according to the invention.

The invention relates to a weight compensation device for a drive of a lifting door, for the position-dependent compensation of the weight force of a door leaf of the lifting door, with a force transmission unit which can be coupled to the drive in order to carry out an opening movement which raises the door leaf and a closing movement which lowers the door leaf, wherein at least one compression spring is provided which is arranged in such a way that it supports the opening movement. The invention also relates to a lifting door, in particular an industrial lifting door, which has a door leaf, with a drive, such as a motor, and with a weight compensation device according to the invention.

The invention relates to a weight compensation device for a drive of a lifting door, for the position-dependent compensation of the weight force of a door leaf of the lifting door, with a force transmission unit which can be coupled to the drive in order to carry out an opening movement which raises the door leaf and a closing movement which lowers the door leaf, wherein at least one compression spring is provided which is arranged in such a way that it supports the opening movement. The invention also relates to a lifting door, in particular an industrial lifting door, which has a door leaf, with a drive, such as a motor, and with a weight compensation device according to the invention.

The invention relates to a weight compensation device for a drive of a lifting door, for the position-dependent compensation of the weight force of a door leaf of the lifting door, with a force transmission unit which can be coupled to the drive in order to carry out an opening movement which raises the door leaf and a closing movement which lowers the door leaf, wherein at least one compression spring is provided which is arranged in such a way that it supports the opening movement. The invention also relates to a lifting door, in particular an industrial lifting door, which has a door leaf, with a drive, such as a motor, and with a weight compensation device according to the invention.

An operator for moving a barrier between closed and open positions mounted on, or close to, the counterbalance for said barrier. The operator is connected to the counterbalance shaft and lifts the barrier by rotating the counterbalance shaft with attached cable drums and thereby takes up cable connected to the bottom of the door. There is an upper cable connected to the top of the door through a cable drum in the operator. A power spring biases the operator cable drum to always take up the upper cable, keeping it wound. The operator cable drum is connected to the motor through a clutch which when engaged allows the operator to pull the door closed. While the door is closing the clutch can be disengaged to allow the operator cable drum to take up and then pay out the upper cable connected to the top of the door as needed.

The overhead door cable adjuster system includes a tensioning assembly, and a second pulley. The overhead door cable adjuster system is useful for easily installing a garage door cable and adjusting the door height while working on the ground level thus enhancing safety while saving time and expense.

A winding device for adjusting the elastic energy of an overhead door spring system installed on a wall structure, the door having at least a door panel which can be moved up and down constrained within a track. The door also has a counterbalance system with a coil spring having a stationary end and a winding end. The door system also has a central shaft held within the counterbalance system. The winding device has a worm gear with a flange, or collar portion, a worm screw engaged by the worm gear, a box or container or a retainer to hold the worm gear and worm screw together in an engagement status. The worm gear is engaged with the central shaft by at least one fastener. It can also be used to lift said door directly when said spring is broken, or there is no spring at all.

The invention relates to a weight compensation device for a drive of a lifting door, for the position-dependent compensation of the weight force of a door leaf of the lifting door, with a force transmission unit which can be coupled to the drive in order to carry out an opening movement which raises the door leaf and a closing movement which lowers the door leaf, wherein at least one compression spring is provided which is arranged in such a way that it supports the opening movement. The invention also relates to a lifting door, in particular an industrial lifting door, which has a door leaf, with a drive, such as a motor, and with a weight compensation device according to the invention.

A lift gate system includes a gate, a first pole, a second pole, a header and an internal operator. The first pole is configured to attach to the ground on one side of the gate and includes a first track attached approximate to a first top. The second pole is configured to attach to the ground on the opposite side of the gate from the first pole and includes a second track attached approximate to a second top. The header interconnects the first top with the second top. The internal operator is configured for lifting the gate, where the internal operator is inside the first pole, the second pole, and/or the header.

An operator for moving a barrier between closed and open positions mounted on, or close to, the counterbalance for said barrier. The operator is connected to the counterbalance shaft and lifts the barrier by rotating the counterbalance shaft with attached cable drums and thereby takes up cable connected to the bottom of the door. There is an upper cable connected to the top of the door through a cable drum in the operator. A power spring biases the operator cable drum to always take up the upper cable, keeping it wound. The operator cable drum is connected to the motor through a clutch which when engaged allows the operator to pull the door closed. While the door is closing the clutch can be disengaged to allow the operator cable drum to take up and then pay out the upper cable connected to the top of the door as needed.