Axially compact mechanical igniter for thermal batteries and the like
US7437995B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2006 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Apr 28, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M6/36
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An inertial igniter including: a first member having a wall and internal cavity; a second member slidable in the internal cavity, a striker disposed thereon and a first concave portion; a third member slidable on an exterior surface of the wall, a second concave portion; biasing springs for biasing the first and second members in a direction opposite an acceleration; locking balls in the first and second concave portions for preventing movement of the second and third members when the acceleration time profile is below a predetermined threshold; and a percussion cap primer on the first member; wherein when the acceleration time profile is greater than the predetermined threshold the locking balls are released from the concave portions to first permit relative movement of the third member with the first member and after a time delay to permit relative movement of the second member with the first member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.