Patent ID: 8991511
Filing Date: 2015-03-31
Classification: A62C

Abstract:
1. A fluid ejection device, comprising: a cylinder shaped tank, split hermetically, perpendicular to its axis, into two chambers by a piston, which is configured to slide axially inside the tank; a first chamber, including a non-gaseous fluid, which communicates with an ejection port closed by a cap, which is configured to open for a pressure greater than or equal to a defined pressure in the first chamber; and a second chamber, as a pressurization chamber, configured to be connected to means of increasing pressure in the second chamber; wherein the piston includes a threaded portion to fix the piston to the tank at a storage position, and includes a breakable portion configured to break and release the piston for axial translation at a pressure higher than or equal to a given pressure in the second chamber, to cause the fluid to be ejected.