The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 25, 1994
Filed:
Aug. 20, 1993
Masahiko Onda, Tsukuba, JP;
Agency of Industrial Science & Technology, Tokyo, JP;
Minstry of International Trade & Industry, Tokyo, JP;
Abstract
An airship includes a gas envelope filled with a buoyant gas, a duct equipped with an internal propulsion fan and attached to the aft of the gas bag, a boom projecting aft along an extension of the axis of the propulsion fan and an empennage provided on the distal end of the boom and is constituted to prevent boundary layer separation by causing the propulsion fan to suck air flowing along the hull surface into the duct and jet it aft. The duct attached to the aft of the gas bag is formed of a basket-like framework made of rigid light-weight material and covered with taut fabric material, the boom and empennage are formed of airtight fabric material and rigidified by internal pressures, and the internal pressure of the boom and the empennage are regulated so that when load forces received from the empennage side exceed prescribed values above which some part of the airship is liable to be damaged, the boom bends and/or the empennage deforms to relieve the load forces before the damage occurs and the original shape and rigidity is thereafter restored.