Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Solid reactant type
Patent
1993-10-07
1996-06-11
Kratz, Peter
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Solid reactant type
280741, 422305, B01J 700
Patent
active
055253067
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The gas generator according to the present invention is intended for a protective device for occupants of motor vehicles, which device has a filter chamber with filters for the gas flow being discharged, wherein the filter chamber is connected to the propellant chamber and communicates with it through openings.
BACKGROUND OF THE INVENTION
Such gas generators have been known (cf., e.g., the Assignee's German Patents 39,21,472 and 39,21,473).
SUMMARY AND OBJECTS OF THE INVENTION
The object of the present invention is to deviate from the basis of the sheet metal design, on which these and other prior-art gas generators are based, and yet to meet the requirements, some of which are conflicting, namely,
a) absolute tightness over a longer period of time,
b) pressure resistance for a high working pressure,
c) blowing out of a clean gas, which is cooled compared with the combustion chamber temperature, from the blow-out openings on the circumference,
d) light weight, and
e) low manufacturing costs.
The preferred application of the present invention is in gas generators which are mounted, together with an air bag, in a steering wheel of a motor vehicle in order to protect, e.g., a driver in the case of an impact, after ignition initiation by a deceleration-sensitive switch.
According to the invention, a gas generator system of light weight design is provided particularly for use as a protection system for vehicle occupants. The gas generator is formed with a central area with an igniter communicating with a combustion chamber for solid propellant. The combustion chamber encloses the central area and the combustion chamber is in turn enclosed by a filter chamber. The filter chamber includes discharge openings for inflating a gas receiver element (such as an air bag) arranged down stream.
The gas generator is formed of an essentially torodial housing including an upper part and a lower part which are screwed together. The upper and lower parts accommodate and hold between them the igniter, the propellant and the filter and are sealed from the outside in a tight and pressure proof manner. The upper part of the housing has an approximately mushroom-shaped cross section forming a hollow stem or core area for receiving the igniter, the core area including a screw connection portion for screwing the core area together with the housing lower part. The approximately mushroom-shaped part of the housing upper part being screwed together with the housing lower part at the threaded portion at a circumference of the stem of the housing upper part and additionally being screwed together at another circumferential area, located radially outwardly from the circumference of the stem.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its uses, reference is made to the accompanying drawings and descriptive matter in which a preferred embodiment of the invention is illustrated.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
While a specific embodiment of the invention has been shown and described in detail to illustrate the application of the principles of the invention, it will be understood that the invention may be embodied otherwise without departing from such principles.
The housing of the gas generator according to the invention consists of light metal and is prepared especially according to injection molding, diecasting, or extrusion processes with two parts 4 and 5, which are connected to each other essentially by thread connection, wherein one of the parts forms a lower part and the other forms an upper part. The upper part 5 is approximately mushroom-shaped, while the lower part can be described as being of a cup-shaped or tray-shaped design.
The upper part 5 has a central stem, which is hollow for accommodating an igniting unit 1. The igniting unit is connected via a plug 21 t
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Fendt-Edelberg Ruth
Hogenauer Ernst
Schmucker Robert
Simon Josef V.
Kratz Peter
Temic Bayern-Chemie Airbag GmbH
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