System for unevenly weighted sectional doors

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;
• 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;
• a roller assembly having an activation pin and a roller wheel movably situated on the track and coupled to at least one of the sections, wherein the movement of the roller wheel along the roller track guides the movement of the sectional door to and between the open and closed positions;
• a trolley assembly;
• and
• a spring assembly coupled to the trolley assembly;
• wherein when the garage door moves between the open and closed positions, the trolley assembly moves along the roller track and activates the spring assembly.

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;
• wherein the weight assist mechanism is selectively engaged during movement of the sectional door and only engaged while the first one of the sections traverses along a transition portion of the track intermediate a vertical portion and a horizontal portion of the track.

A sectional door comprising:

• a roller track;
• 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 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 roller tracks to and between the open and closed positions;
• and
• a roller assembly having an activation pin and a roller wheel movably situated on the roller track and coupled to at least one of the sections, wherein the movement of the roller wheel along the roller track guides the movement of the sectional door to and between the open and closed positions;
• a trolley assembly comprising an activating surface and a guide wheel movable along the roller track;
• and
• a spring assembly fixably attached at a first end to the header and at a second end to the trolley assembly;
• wherein when the garage door moves between the open and closed positions, the trolley assembly moves along the roller track and activates the spring assembly.