Sectional overhead door for low lintel heights

US4878529A · kind A · utility

Assignee

• Hormann KG Brockhagen · DE

Inventor

• Michael Hormann · Bodenwerder, DE

Key dates

• Filing date: Jan 28, 1987
• Grant date: Nov 7, 1989
• Expiry date: Jan 28, 2007

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E05Y2900/106
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

Sectional overhead garage door for low lintel heights, with the door leaf members of which, except for the one that is uppermost in the closed position, being guided in guide rails having a vertical, an arcuate, and a horizontal section, and with rollers of the uppermost door leaf member being guided in two guide rails, extending with an approximately horizontal section above and in parallel to the approximately horizontal primary guide section provided on the same side, and each of these being connected to an intermediate guide member adapted to be lowered from the horizontal in the direction of the upper frame zone, so that the uppermost door leaf member, when the door leaf is transferred into the closed position, passes into the plane of the closed door leaf along a shorter path than the remaining door leaf members. The arrangement of the intermediate guide member for the rollers of the uppermost door leaf member is such that a weight balancing shaft, torsion springs, and the rollers can be attached at a lower level. This is achieved by providing the intermediate guide member for the rollers of the uppermost door leaf member as well as the torsion shaft bearing at special bearin…