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:
Jan. 10, 1989
Filed:
Aug. 24, 1987
Mark W Galvin, Simi Valley, CA (US);
The Marquardt Company, Van Nuys, CA (US);
Abstract
The projectile includes a preferably cylindrical body, with an outer preferably generally cylindrical shell disposed over a portion thereof, having a fixed end secured to the body and a rotatable opposite end. The shell bears a number of spaced fins simultaneously moveable between a closed low-profile position and a deployed flight-stabilizing position by rotating the rotatable shell end. Each fin has a pair of elongated plates hinged together at one end, and the fin plates are also hinged to the shell at opposite ends thereof. The plates are aligned in a direction diagonal to the longitudinal axis of the body, while the hinges are also diagonal to that axis so that a rolling moment around the longitudinal axis of the projectile is imparted by the fins during projectile flight. The projectile includes an impeller connected to the rotatable end of the shell for rotation thereof around the body's longitudinal axis. In the deployed position the fins are preferably dome-shaped with central air passageways, with the main plane of the plates diagonal to the body longitudinal axis for the described rolling moment and with the fins at about the same transverse position. The impeller may include a return spring, a releasable lock and/or a cowling keyed to a rotor and to the rotatable shell end.