Hybrid inflator
US5257819A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1992 |
| Grant date | Nov 2, 1993 |
| Priority date | — |
| Expiry date | Dec 2, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/1647
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An inflator (110) including: a pressure means (12, 14, 16, 20) for storing a quantity of stored inflation gas under pressure. The pressure means including a first burst disk (46) in communication with the stored inflation gas and preventing egress of the gas from the chamber and a hollow sliding piston (172) having at one end thereof cutting edges (174) for puncturing the first burst disk (46). A shear disk (180) having a stationary outer portion (187) and a central portion or second disk (186), central portion is secured to one end of the piston (172) opposite the cutting edges (174). The central portion is capable of separating from the outer portion and moving with the piston (172). A quantity of propellant material (218) is provided near the second burst disk (80) to produce gaseous combustion products when burned. The piston is propelled into the first burst disk (46) after the central portion (186) of the shear disk separates from the outer portion in response to the build up of pressure generated due to the burning of a propellant (218), thereby permitting the egress of the stored inflation gas. The central portion (186) or second burst disk is ruptured by the continued buil…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.