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. 16, 2007
Filed:
Mar. 10, 2005
Peter Karalis, Watertown, MA (US);
Raymond A. Stacy, Framingham, MA (US);
Richard Zaven Karadizian, Westford, MA (US);
James E. Marquedant, Mendon, MA (US);
Neil O Brillhart, Whitinsville, MA (US);
William Mahoney, Sudbury, MA (US);
Peter Karalis, Watertown, MA (US);
Raymond A. Stacy, Framingham, MA (US);
Richard Zaven Karadizian, Westford, MA (US);
James E. Marquedant, Mendon, MA (US);
Neil O Brillhart, Whitinsville, MA (US);
William Mahoney, Sudbury, MA (US);
Kidde-Fenwal, Inc., Ashland, MA (US);
Abstract
An apparatus and method for dispensing fluid including a pressure vessel at a first pressure and a reservoir at a second pressure. The reservoir communicates with the pressure vessel via a first aperture and with an environment at a third pressure via a second aperture. A reservoir vent having open and closed positions, that when opened the reservoir vents to a fourth pressure, and when closed the reservoir does not vent. A piston moveably disposed within the reservoir, and defines an aperture therethrough. A first burst seal disposed in the first aperture seals the pressure vessel from the reservoir, and engaged with the piston to be moveable therewith. A second burst seal disposed in the second aperture seals the reservoir from the environment. When the reservoir vents to the fourth pressure, the piston ruptures the second seal, and a first and third pressure difference ruptures the first seal.