Tensioner drive for a seatbelt installation, and assembly having a tensioner drive
US11628800B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2020 |
| Grant date | Apr 18, 2023 |
| Priority date | — |
| Expiry date | Dec 18, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2022/1806
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention relates, inter alia, to a tensioner drive (11) for a seatbelt installation, having a tube (30), at least one piston (25) which within the tube (30) is displaceable along a propulsion direction (P2), and a gas generator (40) for generating a propulsion gas (G) and a propulsion pressure on a pressure-facing side of the piston (25). According to the invention it is provided that the piston (25) on the pressure-facing side thereof has a first sealing element (90) which, upon triggering the gas generator (40), is impinged with the propulsion pressure and seals a first tubular portion (31) of the tube (30) that is filled with propulsion gas (G) in relation to a second tubular portion (32) of the tube (30) that in the propulsion direction (P2) lies behind said first tubular portion (31); a second sealing element (100) which, upon triggering the gas generator (40), is separated from the first sealing element (90) is disposed in the propulsion direction (P2) behind the first sealing element (90); wherein the second sealing element (100) is displaceable relative to the first sealing element (90), and in the event of leakage of the first sealing element (90) and when impinged wi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.