System for unevenly weighted sectional doors

摘要

A sectional garage door has a roller track and a plurality of sections pivotally coupled together for movement along the roller track to and between open and closed positions relative to a door opening. A first one of the sections is heavier than other sections. The sectional garage also includes a counterbalance mechanism coupled to the sections to assist an operator in moving the sections along the roller tracks to and between the open and closed positions. The sectional garage door also has a weight assist mechanism coupled to the door and engaged with at least one of the sections to assist at least one of the sections to assist in the movement of the first one of the sections during movement along at least a portion of the roller track due to the weight of the first section relative to the other sections.

主权项

1. A sectional door comprising:
a track; a plurality of sections pivotally coupled together for movement along the track to and between open and closed positions relative to a door opening wherein a first one of the sections is heavier than other sections; a counterbalance mechanism coupled to the sections to assist an operator in moving the sections along the track to and between the open and closed positions; and a weight assist mechanism coupled to the door and engaged with at least one of the sections to assist the at least one of the sections in the movement along at least a portion of the track due to the weight of the first section relative to the other sections, and selectively disengaged from the at least one section when the door is at least partially open; wherein the weight assist mechanism is independent of the counterbalance mechanism.