Vehicle seat safety harness

摘要

There is provided an arrangement for tensioning a strap of a vehicle seat safety harness upon or immediately prior to a collision. The arrangement includes strap tensioning means connected to attachment points of the strap adapted to be actuated by a force generating assembly, which assembly is associated with a sensing device responsive to an impact or an imminent impact on the vehicle for initiating the force. Preferably the strap tensioning means comprises two pistons arranged for mutually opposing movement in a common cylinder, each piston being connected via a line to an attachment point whereby actuation of the means effects simultaneous tensioning at the two points.