Abstract:
An apparatus (16) includes a canister (72) defining a first hermetically sealed combustion chamber (73). The first combustion chamber (73) contains a source of inflation fluid comprising a body (27) of ignitable gas generating material. The canister (72) has a cylindrical configuration with a longitudinal central axis (79) and first and second opposite end walls (76 and 78). An initiator assembly (28) is located outside the canister (72). When the initiator assembly (28) is actuated, it ruptures the first end wall (76) of the canister (72). It also projects pyrotechnic combustion products into the first combustion chamber (73) to ignite the body (27) of gas generating material in the first combustion chamber (73). The initiator assembly (28) comprises an electrically actuatable igniter (122) and a booster charge (124) of pyrotechnic material which is separate from the igniter (122). The booster charge (124) is contained in a second hermetically sealed combustion chamber (129) which is defined in part by the first end wall (76) of the canister (72), and in part by a booster cover (130) which is fixed to the canister (72).
Abstract:
An apparatus (10) includes a vehicle seat back (20) and an inflatable vehicle occupant protection device (18) supported on the seat back (20) for deployment upward from the upper end (62) of the seat back (20). The apparatus (10) further includes a backing member (70) supported on the seat back (20) for movement from a retracted position to a deployed position under the influence of inflation fluid pressure forces applied by the protection device (18). When the backing member (70) is in the deployed position, it projects upward from the upper end (62) of the seat back (20) at a location behind the protection device (18). The backing member (70) is non-deflectable under the influence of the inflation fluid pressure forces applied by the protection device (18).
Abstract:
An apparatus (16) includes a canister (72) defining a hermetically sealed combustion chamber (73). The combustion chamber (73) contains a source of inflation fluid in the form of a body (27) of ignitable gas generating material. The canister (72) has a cylindrical configuration with a longitudinal central axis (79) and first and second opposite end walls (76) and (78). The end walls (76) and (78) have predetermined rupturable portions (82) and (90) extending across the axis (79). An initiator assembly (28) is located outside the canister (72). When the initiator assembly (28) is actuated, it ruptures the rupturable portion (82) of the first end wall (76). It also projects pyrotechnic combustion products into the combustion chamber (73) along the axis (79) to ignite the body (27) of gas generating material in the combustion chamber (73). The rupturable portion (90) of the second end wall (78) is rupturable under a predetermined inflation fluid pressure force acting outward from the combustion chamber (73).
Abstract:
A headrest apparatus (10) for a vehicle seat (14) includes first and second relatively movable cushion portions (18a, 18b). An outer covering (16) for the first and second cushion portions has a head engaging portion (19) for engaging the head (21) of a vehicle occupant. The apparatus (10) further includes actuatable means (36) located within the outer covering (16) which, upon the occurrence of a vehicle crash event, moves the head engaging portion (19) of the outer covering (16) and one (18a) of said cushion portions relative to the other cushion portion (18b) in a direction toward the head (21) of the occupant of the vehicle seat (14).
Abstract:
An inflator (40) for inflating an inflatable vehicle occupant protection device (14) includes structure that defines a chamber (220) and inflation fluid stored in the chamber. The inflation fluid includes in mixture a fuel gas, an oxidizer gas, and an inert gas mixture. The inflator (40) also includes an actuator for initiating a combustion reaction between the fuel gas and the oxidizer gas. The inert gas mixture includes at least two different inert gases and has a composition selected to produce desired performance characteristics of the inflator (40).
Abstract:
An actuatable fastener (50) includes a body (80) including a head (82) and a shank (84). The body (80) includes an interior chamber (120) partially defined by a side wall (132) extending from the head (82) into the shank (84) and an end wall (138) positioned in the shank. A member (140) is disposed in the chamber (120). An initiator (160) is actuatable to produce combustion products in the chamber (120) that act on the member (140) to move the member in a first direction in the chamber to strike the end wall (138). The member (140) strikes the end wall (138) creating a fracture (222) in the shank (84) separating at least a portion of the shank from a remainder (220) of the shank. The combustion products moving the member (150) beyond the fracture (222) at least a predetermined distance (226) to move the portion of the shank (84) at least the predetermined distance from the remainder (220) of the shank.
Abstract:
An inflator for inflating a vehicle occupant restraint includes an annular slag screen or filter which is disposed between a combustion cup and a diffuser cup. A canister of gas generating material is disposed in the combustion cup. Upon igniting the gas generating material in the canister, gas flows through openings in the side wall of the combustion cup to the slag screen or filter. The gas then flows through a final filter assembly and out of the diffuser cup. The slag filter is preassembled on the combustion cup by radially contracting a surface of the filter to grip the side wall of the combustion cup. This enables the combustion cup and slag filter to be positioned as a unit relative to the diffuser cup and final filter.
Abstract:
An apparatus for use in inflating a vehicle occupant restraint includes an inflator housing and a canister containing gas generating material. The canister has a resiliently deflectable wall which presses against the inflator housing to hold the canister against movement relative to the inflator housing. A cushion is disposed inside the canister between the wall and the gas generating material. In addition, auto ignition material is disposed in a projecting wall portion of the canister. When the apparatus is assembled, the wall of the canister is resiliently deflected by applying a force against the projecting wall portion of the canister. After the inflator housing has been closed, the canister is retained against movement relative to the inflator housing by the force applied by the resiliently deflected wall of the canister against the inflator housing.
Abstract:
An inflator generates gas for inflating a vehicle occupant restraint. The inflator comprises a housing. The housing has a chamber for gas generating material and gas outlet openings through which gas flows from the housing into the restraint. A filter in the housing provides a gas flow path to the gas outlet openings. The filter filters and cools the gas as it flows in the gas flow path. The filter comprises a plurality of filter layers. At least one of the filter layers has a higher resistance to gas flow than at least one other of the filter layers. The filter layer of higher resistance to gas flow has a portion extending between and engaging the housing and the other filter layer to provide a gas flow sealing zone adjacent the housing. The gas flow sealing zone has a resistance to gas flow higher than the resistance to gas flow of the gas flow path.
Abstract:
A vehicle occupant safety apparatus (10) includes an inflatable vehicle occupant protection device (20) and a container (32) for storing gas (36) under pressure. The container (32) has an outlet (38). The apparatus (10) includes a mechanism (42) for opening the container (32) to release the gas (36) to flow from the outlet (38) at supersonic speed. The apparatus (10) also includes a pyrotechnic material (70) which is ignitable to generate gas for helping to inflate the inflatable device (20). The pyrotechnic material (70) is ignitable in response to being impacted by the gas (36) flowing from the outlet (38) at supersonic speed. The apparatus (10) further includes a conduit (50) directing at least a first portion of the gas (36) flowing from the container (32) to the pyrotechnic material (70) to ignite the pyrotechnic material.