Inventors:
Peter Karalis - Watertown MA, US
Raymond Stacy - Framingham MA, US
Richard Karadizian - Westford MA, US
James Marquedant - Mendon MA, US
Neil Brillhart - Whitinsville MA, US
William Mahoney - Sudbury MA, US
Assignee:
KIDDE-FENWAL INC. - Ashland MA
International Classification:
B67D005/00, B67D005/42, G01F011/00
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.