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:
Nov. 24, 2009
Filed:
Feb. 27, 2006
Peikuan Wu, Fairfax, VA (US);
Guy B. Spear, Marshall, VA (US);
Peikuan Wu, Fairfax, VA (US);
Guy B. Spear, Marshall, VA (US);
Aerojet- General Corporation, Sacramento, CA (US);
Abstract
A piston tank with elongated contact between the piston and the tank bore to prevent piston cocking and preserve alignment is equipped with a compound piston that includes a carriage (or glider) and a barrier that is movable relative to the carriage. The carriage is an elongate ring with sealing and contact sites between the ring and the tank bore and axially spaced apart, and the barrier moves or changes shape in response to pressure differentials across the barrier imposed by a pressurized driving fluid. The barrier and carriage can thus move between a position allowing the full volume of the tank to be occupied by fuel or other functional fluid and a position ejecting all of the fuel or functional fluid out of the tank through an outlet port. Two examples of the barrier are disclosed—a plate that is movable within the ring and a diaphragm affixed to the ring and deformable in both directions.