Hybrid-type device for inflating vehicle safety equipment
First Claim
1. Device for inflating vehicle safety equipment with a chamber (1) filled with compressed gas and at lit two pyotechnic charges structured and arranged for producing gas upon ignition, whereineach of said charges (10, 22) has a mass of at least 5% of mass of the compressed gas in said chamber (1), said two charges (10, 22) are situated outside said gas chamber (1) on different sides thereof, said gas chamber (1) is essentially cylindrical and said charges (10,22) are situated on opposite ends thereof, and on a first side end wall (3) of said gas chamber (1), on which a first (10) of said charges (10, 22) is situated, a gas chamber opening (8), connectable with the safety equipment, and a seal (19), for Initial sealing of said gas chamber opening (8), are provided.
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Accused Products
Abstract
The present invention relates to a hybrid-type device for inflating vehicle safety equipment with gas chamber for acceptance of compressed gases and at least two charges for the production of gas. The inflation devices is distinguished in that the two charges each have a mass of at least 5% of the mass of the compressed gas so that each charge can substantially increase the temperature of the gas and in that they are each arranged outside the gas chamber, on different sides thereof They can thus be ignited simply and precisely at predetermined without reciprocal impact.
34 Citations
32 Claims
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1. Device for inflating vehicle safety equipment with a chamber (1) filled with compressed gas and at lit two pyotechnic charges structured and arranged for producing gas upon ignition, wherein
each of said charges (10, 22) has a mass of at least 5% of mass of the compressed gas in said chamber (1), said two charges (10, 22) are situated outside said gas chamber (1) on different sides thereof, said gas chamber (1) is essentially cylindrical and said charges (10,22) are situated on opposite ends thereof, and on a first side end wall (3) of said gas chamber (1), on which a first (10) of said charges (10, 22) is situated, a gas chamber opening (8), connectable with the safety equipment, and a seal (19), for Initial sealing of said gas chamber opening (8), are provided.
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28. Device for inflating vehicle safety equipment with a chamber (1) filled with compressed gas and at least two pyrotechnic charges structured and arranged for producing gas upon ignition, wherein
each of said charges (10, 22) has a mass of at least 5% of mass of the compressed gas in said chamber (1). said two charges (10, 22) are situated outside said gas chamber (1) on different sides thereof, said gas chamber (1) is essentially cylindrical and said charges (10,22) are situated on opposite ends thereof, and on a first side of said gas chamber (1), on which a first (10) of said charges (10, 22) is situated, a gas chamber opening (8), connectable with the safety equipment, and a seal (19), for initial sealing of said gas chamber opening (8), are provided, comprising charge chambers (9, 23) in which said pyrotechnic charges (10, 22) are respectively situated, each said charge chamber (9, 23) provided with a respective charge chamber opening (14, 29) and a seal (17,30) structured and arranged for initial sealing of said charge chamber openings (14, 29) prior to ignition, a first (9) of said charge chambers (9, 23) comprising a detonator (11) for said respective charge (10) situated on a side thereof opposite said compressed chamber (1), a discharge chamber (5) situated between said first charge (9) and compressed gas chamber (1), a separating wall (13) provided between said first pyrotechnic charge chamber (9) and discharge chamber (5) and through which said charge chamber opening (14) is provided, a substantially cylindrical mount (16) situated over said charge chamber opening (14) and structured and arranged to receive said seal (17) which is a piston plug to seal said charge chamber opening (14) prior to ignition of said pyrotechnic charge (10), a guide (20) situated in said charge chamber (5) and structured and arranged to support the separating wall (13) at a first end wall (3) separating said discharge chamber (5) and said compressed gas chamber (1) and through which said gas chamber opening (8) is situated, pierced openings being provided through said guide (20) to permit flow of gas therethrough, said discharge chamber (5) being provided with a circumferential wall (6) connected fluid-tightly at an exterior circumference with said separating wall (13) and weaker than connection of an exterior wall (12) of said charge chamber (9) with said circumferential wall (6) on a side of said pyrotechnic charge (10) opposite said separating wall (13), said first charge chamber (14) being formed as a cylinder, said piston (17) in an initial position prior to ignition, being arranged to at least partially block said gas chamber opening (8), having a head section (18) with a diameter (d18) larger than diameter (d16) of said cylindrical mount (16) and smaller than diameter (d8) of said gas chamber opening (8), said second pyrotechnic charge chamber (20) being provided with a detonator (26) on an opposite side thereof from said compressed gas chamber (1), said seal (30) for said second charge chamber opening being a sealing washer, and comprising a filler opening (27) for filling said gas chamber (1) with gas being sealed by a filler seal (28).
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31. Device for inflating vehicle safety equipment with a chamber (1) filled with compressed gas and at least two pyrotechnic charges structured and arranged for producing gas upon ignition, wherein
each of said charges (10, 22) has a mass of at least 5% of mass of the compressed gas in said chamber (1), said two charges (10, 22) are situated outside said gas chamber (1) on different sides thereof, said gas chamber (1) is essentially cylindrical and said charges (10,22) are situated on opposite ends thereof, and on a first side of said gas chamber (1), on which a first (10) of said charges (10, 22) is situated, a gas chamber opening (8), connectable with the safety equipment, and a seal (19), for initial sealing of said gas chamber opening (8), are provided, a control device for said pyrotechnic charges (10, 22) structured and arranged for control of said pyrotechnic charges (10, 22) and structured and arranged to control said pyrotechnic charges (10, 22) independently of one another such that different inflation modes can be set up, comprising three Inflation modes (i)-(iii): -
(i) in a first inflation mode, only a first one (10) of said pyrotechnic charges (10, 22) being ignited;
(ii) in a second inflation mode, only a second (22) of said pyrotechnic charges (10, 22) being ignited; and
(iii) in a third inflation mode, both said pyrotechnic charges (10, 22) being ignited, comprising charge chambers (9, 23) in which said pyrotechnic charges (10, 22) are respectively situated, each said charge chamber (9, 23) provided with a respective charge chamber opening (14, 29) and seal (17, 30) structured and arranged for initial sealing of said charge chamber openings (14, 29) prior to ignition, a first (9) of said charge chambers (9,23) comprising a detonator (11) for said respective charge (10) situated on a side hereof opposite said compressed gas chamber (1), a discharge chamber (5) situated between said first charge chamber (9) and compressed gas chamber (1), a separating wall (13) provided between said first pyrotechnic charge chamber (9) and discharge chamber (5) and through which said charge chamber (14) is provided, a substantially cylindrical mount (16) situated over said charge chamber opening (14) and structured and arranged to receive said seal (17) which is a piston plug to seal said charge chamber opening (14) prior to ignition of said pyrotechnic charge (10), a guide (20) situated in said discharge chamber(5) and structured and arranged to support the separating wall (13) at a first end wall (3) separating said discharging chamber (5) and said compressed gas chamber (1) and through which said gas chamber opening (8) Is situated, pierced openings being provided through said guide (20) to permit flow of gas therethrough, said discharge chamber (5) being probed with a circumferential wall (6) connected fluid-tightly at an exterior circumference with said separating wall (13) and weaker than connection of an exterior wall (12) of said charge chamber (9) with said circumferential wall (6) on a side of said pyrotechnic charge (10) opposite said separating wall (13), said first charge chamber opening (14) being formed as a cylinder, and said piston (17) In an initial position prior to ignition, being arranged to at least partially block said gas chamber opening (8), having a head section (18) with a diameter (d18) larger than diameter (d18) of said cylindrical mount (16) and smaller than diameter (d8) of said gas chamber opening (8), said second pyrotechnic charge chamber (23) being provided with a detonator (26) on an opposite side thereof from said compressed gas chamber (1), said seal (30) for said second charge chamber opening (29) being a sealing washer, and comprising a filler opening (27) for filling said gas chamber (1) with gas and being sealed by a filler seal (28).
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Specification