ROBERT ALLEN HOFF
Pilots at 25, Idaho Falls, ID

License number
Idaho A0859322
Issued Date
Apr 2016
Expiration Date
Apr 2017
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
10741 S 25Th E, Idaho Falls, ID 83406
LicenseFiles verified this license of May 6, 2017 at the Federal Aviation Administration.

Professional information

Robert Hoff Photo 1

Hangar Door Assembly

US Patent:
4793398, Dec 27, 1988
Filed:
Jan 8, 1987
Appl. No.:
7/001823
Inventors:
Robert A. Hoff - Idaho Falls ID
John D. Hoff - Idaho Falls ID
International Classification:
E05D 1526
US Classification:
160213
Abstract:
An articulating door is fixed to a torque tube through a plurality of structural tube elements and gussets. The torque tube is rotatably fixed to the building. A sprocket, which is engaged to the torque tube, is driven by an electric motor and gear reduction drive, and a chain reduction drive. An arm assembly and counterbalance element counterbalance the door as it moves between its open and closed positions. In its open position, the door remains folded exteriorly of the building.

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