초록 ▼

A propellant augmented, gas dispensing device is charged with a pressurized gas during assembly by inserting the gas in its solid form into the pressure chamber and thereafter sealing the pressure chamber. The gas is chosen so that it is in its gaseous state at normal ambient conditions. In another

A propellant augmented, gas dispensing device is charged with a pressurized gas during assembly by inserting the gas in its solid form into the pressure chamber and thereafter sealing the pressure chamber. The gas is chosen so that it is in its gaseous state at normal ambient conditions. In another aspect, an improved pressure relief assembly includes a burst disc affixed to a flow passage between the pressurized gas chamber and the propellant chamber for normally preventing flow through the passage. In its preferred form, the burst disc carries an annular score line. A support member is provided on the propellant side of the burst disc and is placed in supporting contact with the burst disc adjacent the score line. The support member has a central opening communicating with the passageway to the propellant chamber. The score line is located outwardly from the central opening. The support structure allows the disc to rupture in the region of the central opening upon the occurrence of a predetermined high pressure in the gas chamber, while permitting the disc to rupture along the score line when the pressure difference between the propellant chamber and the gas chamber exceeds a predetermined low pressure on the propellant side of the disc.

대표청구항 ▼

In a propellant augmented gas dispensing device including: means defining a gas chamber, means defining a propellant chamber, means defining a first flow passage between said gas and propellant chambers, and means defining an exhaust passage from said propellant chamber, an improved pressure relief

In a propellant augmented gas dispensing device including: means defining a gas chamber, means defining a propellant chamber, means defining a first flow passage between said gas and propellant chambers, and means defining an exhaust passage from said propellant chamber, an improved pressure relief assembly for said gas chamber comprising: a burst disc positioned across said first flow passage for preventing flow therethrough, said burst disc having a propellant side and a gas side, and a support member affixed to said device and located on the propellant side of and in supporting contact with said burst disc, said support member having a central opening communicating with said first flow passage, said disc spanning said central opening and having a zone of weakness surrounding and being located radially outwardly from said central opening, said burst disc being substantially supported by said support member in the region adjacent and radially inwardly from said zone of weakness, said disc and said central opening cooperating to allow said disc to rupture in the region adjacent said central opening upon occurrence of a predetermined high pressure in said gas chamber to release the gas in said gas chamber to said exhaust passage, said disc being capable of rupturing along said zone of weakness when the pressure difference between said propollent chamber and said gas chamber exceeds a predetermined low pressure on said propellant side.