Feb 10, 2026

US12546573 - Gas generator

A gas generator includes a housing, an ignition device attached to one end side of the housing, a combustion chamber, a diffuser portion formed on the other end side and including a closed end, an open end, and a side wall positioned between the closed end and the open end, a plurality of gas discharge ports formed in the diffuser portion and including a first gas discharge port having a short distance from the combustion chamber and a second gas discharge port having a long distance from the combustion chamber, and a total opening area of the first gas discharge port and a total opening area of the second gas discharge port are different from each other, and a filter accommodated in the accommodating space, the filter extending from a side of the open end toward a side of the closed end in the diffuser portion.

Assignee: DAICEL CORPORATION
Inventors: Tomoya Sasaki
Filing date: 2023-10-30

gasgeneratorcombustionmilitarymaterial

The patent describes a gas generator featuring a housing with an ignition device, a combustion chamber for a gas generating agent, and a diffuser portion with multiple gas discharge ports of varying sizes. It includes a filter designed to cool combustion gases as they flow from the combustion chamber through the diffuser, enhancing efficiency and performance.

Claim 1

1 . A gas generator comprising: a housing forming an outer shell container; an ignition device attached to one end side of the housing; a combustion chamber formed inside the housing and configured to accommodate a gas generating agent; a diffuser portion in a cup shape formed on the other end side in the housing, the diffuser portion including a closed end formed in one end part, an open end formed on an opposite side of the closed end, and a side wall positioned between the closed end and the open end, the diffuser portion being provided such that the open end thereof is disposed to face the combustion chamber and an accommodating space for internally accommodating a filter is formed therein; a plurality of gas discharge ports formed in the diffuser portion and including a first gas discharge port relatively close in distance from the combustion chamber and a second gas discharge port relatively farther in distance from the combustion chamber than the first gas discharge port, and a total opening area of the first gas discharge port is different from a total opening area of the second gas discharge port; and a filter including at least a part accommodated in the accommodating space and facing the plurality of gas discharge ports, the filter including a solid cooling portion that extends from the open end to the closed end in the diffuser portion, and that protrudes from the open end toward the combustion chamber and an annular gap is formed between a protruding portion of the solid cooling portion and the housing, allowing the combustion gas from the combustion chamber to flow into the solid cooling portion through an end face of the protruding portion facing the combustion chamber in a protruding direction and an side face of the protruding portion facing the annular gap, and cools a combustion gas of the gas generating agent. a housing forming an outer shell container; an ignition device attached to one end side of the housing; a combustion chamber formed inside the housing and configured to accommodate a gas generating agent; a diffuser portion in a cup shape formed on the other end side in the housing, the diffuser portion including a closed end formed in one end part, an open end formed on an opposite side of the closed end, and a side wall positioned between the closed end and the open end, the diffuser portion being provided such that the open end thereof is disposed to face the combustion chamber and an accommodating space for internally accommodating a filter is formed therein; a plurality of gas discharge ports formed in the diffuser portion and including a first gas discharge port relatively close in distance from the combustion chamber and a second gas discharge port relatively farther in distance from the combustion chamber than the first gas discharge port, and a total opening area of the first gas discharge port is different from a total opening area of the second gas discharge port; and a filter including at least a part accommodated in the accommodating space and facing the plurality of gas discharge ports, the filter including a solid cooling portion that extends from the open end to the closed end in the diffuser portion, and that protrudes from the open end toward the combustion chamber and an annular gap is formed between a protruding portion of the solid cooling portion and the housing, allowing the combustion gas from the combustion chamber to flow into the solid cooling portion through an end face of the protruding portion facing the combustion chamber in a protruding direction and an side face of the protruding portion facing the annular gap, and cools a combustion gas of the gas generating agent.

Google Patents

https://patents.google.com/patent/US12546573

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12546573