Energy management for seat belt tensioner
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 23, 2000
Grant Date -
N/A
app pub date -
Aug 27, 1998
filing date -
Aug 27, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved pyrotechnic-operated seat belt tensioner provides variable energy management to enable tailoring operation of the seat belt tensioner to different applications. A seat belt tensioner has a reel mounting one end of a seat belt, a pressure chamber, and a piston having screw threads connecting to the reel. The reel is rotatable to retract and extend the seat belt. The piston is mounted for movement in the chamber in response to activation of pyrotechnic devices, which exert a force on the piston, to rotate the reel to retract the seat belt. A pair of pyrotechnic devices are provided which are separately actuatable to selectively activated to vary the magnitude and duration of the force. A third pyrotechnic device is provided to selectively open a chamber vent. The piston and pressure chamber are configured to prevent piston rotation.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully