Tensioning device
AssigneeAutoliv Development AB
InventorsOle Scharnberg, Thomas Gasthaus
Life of this patent
Estimating the term…
Abstract
The present invention relates to a tensioning device for a seat belt device, with a gas generator (10) for generating a pressurized gas, a piston (2) that can be driven by the pressurized gas, a tension cable (5) connected to the piston (2), which tension cable can be connected to a safety belt component that is to be set into a tensioning movement and which tension cable extends through the piston (2), a guide part (3) arranged on the tension cable (2), and a tensioning tube (6) for receiving the piston (2) and the guide part (3), which is characterized in that the guide part (3) is arranged on the side of the piston (2) facing away from the gas generator (10) and is movable relative to the piston (2).
Claims16
A tensioning device, comprising;
- a gas generator for generating a pressurized gas,
- a piston that can be driven by the pressurized gas,
- a tension cable connected to the piston, wherein the tension cable can be connected to a component that is to be set into a tensioning movement and wherein the tension cable extends through the piston,
- a guide part arranged on the tension cable on a side of the piston facing away from the gas generator,
- a tensioning tube for receiving the piston and the guide part, the tensioning tube having a section forming a curvature, and
- further comprising, wherein the guide part and the piston are initially a one piece assembly separated from one another by a predetermined breaking point and wherein the piston and the guide part become detached at the predetermined breaking point upon insertion of the piston and the guide part into the tensioning tube past the section forming a curvature, whereupon the guide part is moveable relative to the piston.
A method for assembling a tensioning device, comprising the steps of,
- providing a gas generator for generating a pressurized gas,
- providing a piston that can be driven by the pressurized gas,
- providing a tension cable connected to the piston, wherein the tension cable can be connected to a component that is to be set into a tensioning movement and wherein the tension cable extends through the piston,
- providing a guide part arranged on the tension cable on a side of the piston facing away from the gas generator,
- providing a tensioning tube for receiving the piston and the guide part, the tensioning tube having a section forming a curvature, and
- wherein the guide part and the piston are provided initially as a one piece assembly separated from one another by a predetermined breaking point, and
- inserting the piston and the guide part into the tensioning tube past the section forming a curvature, whereupon the piston and the guide part become detached at the predetermined breaking point and the guide part becomes moveable relative to the piston.
Dependencies are inferred from the claim text.