×

Device for tightening a safety belt of a motor vehicle

  • US 5,519,997 A
  • Filed: 09/22/1994
  • Issued: 05/28/1996
  • Est. Priority Date: 09/22/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. A drive mechanism comprises a guide pipe, a piston which is guided inside the guide pipe and can be driven by means of a propellant that is generated by a gas generator and a traction mechanism which connects the piston with a part to be driven and with a pressure chamber that is formed in the guide pipe whereby the propellant which is generated in the interior of the piston is discharged from the pressure chamber via at least one outlet opening in the piston, wherein:

  • the traction mechanism (15) comprises a traction cable and is rigidly connected with the piston (2) via a cable pressing (17) which has a larger diameter than the traction cable,the gas generator (1) which is arranged in the piston (2) has a propellant outlet side (3) which is directed towards an interior space (4) of the piston and opened by propellant ignited in the gas generator,the interior space (4) of the piston is constructed as a combustion chamber for the propellant which is discharged from the gas generator and is provided with at least one outlet opening (5), andthe interior space (4) of the piston simultaneously serves for accommodating the cable pressing (17), said cable pressing (17) comprising a support ring which is rigidly braced on a base of the piston in the interior space of the piston.

View all claims
  • 11 Assignments
Timeline View
Assignment View
    ×
    ×