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US 7,607,604 B2Granted
Seat belt tensioner
AssigneeTakata Corporation
InventorsWalter Scherzinger, Roland Schnabl, Thomas Schwer
Life of this patent
Estimating the term…
Abstract
The disclosed seat belt tensioner may comprise a drive motor, a gear connected to the drive motor, and a seat belt spindle connected to the gear by a spindle clutch. The spindle clutch may have spindle clutch pawls, which engage in pawl teeth of the seat belt spindle to couple the seat belt spindle and the gear. The spindle clutch may also comprise a synchronization pawl configured to alit the pawl teeth before the spindle clutch pawls engage in the pawl teeth.
Claims22
A seat belt tensioner comprising:
- a drive motor;
- a gear connected to the drive motor;
- a seat belt spindle connected to the gear by a spindle clutch, wherein the seat belt spindle comprises pawl teeth, wherein the spindle clutch comprises spindle clutch pawls for engaging in the pawl teeth to couple the seat belt spindle and the gear;
- and
- a synchronization pawl configured to align the pawl teeth by engaging with the pawl teeth before the spindle clutch pawls pivot in toward the direction of the pawl teeth and engage in the pawl teeth.
2 more elements
A seat belt tensioner comprising:
- a gear;
- a seat belt spindle connected to the gear by a spindle clutch, wherein the seat belt spindle comprises pawl teeth, wherein the spindle clutch comprises spindle clutch pawls for engaging in the pawl teeth to couple the seat belt spindle and the gear;
- a synchronization pawl configured to align the pawl teeth by engaging with the pawl teeth before the spindle clutch pawls pivot in toward the direction of the pawl teeth and engage in the pawl teeth;
- and
- a blocking device configured to block the seat belt spindle in a tensioned position after an end of a tensioning operation, wherein the blocking device has a latching pawl configured to be brought into a first pawl position for blocking the seat belt spindle in a seat belt-unrolling direction and into a second pawl position for blocking the seat belt spindle in a seat belt-tensioning direction.
2 more elements
A seat belt tensioner comprising:
- a mechanical automatic gear having first and second force transmission paths;
- a seat belt spindle connected to the gear by a spindle clutch, wherein the seat belt spindle comprises pawl teeth, wherein the spindle clutch comprises spindle clutch pawls for engaging in the pawl teeth to couple the seat belt spindle and the gear;
- and
- a synchronization pawl configured to align the pawl teeth by engaging with the pawl teeth before the spindle clutch pawls pivot in toward the direction of the pawl teeth and engage in the pawl teeth,
- wherein the first force transmission path comprises a sliding clutch that disengages when a predetermined switching-off moment is exceeded such that the second force transmission path is activated, and
- wherein a first sliding clutch pawl is mounted pivotably on a pawl carrier such that the first sliding clutch pawl is configured to be pivoted into a coupling position and into a disengaging position.
3 more elements
Dependencies are inferred from the claim text.