Self-regulating damper unit
AssigneeStabilus GmbH
InventorsLars Löhken, Raphael Piroth, Markus Müller, Ulrich Probst, Marcus Weber
Life of this patent
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Abstract
A self-regulating damper unit comprising a cylinder having a first working chamber and a second working chamber, a piston, a piston rod, and a through-hole between the first working chamber and the second working chamber. The damper unit also comprises a shiftable weight which modifies a passage cross-section of the through-hole. The shiftable weight is movably mounted such that retardation of the piston causes enlargement of the passage cross-section. A seat belt unit comprises a seat belt and the damper unit.
Claims18
A self-regulating damper unit, comprising:
- a cylinder filled with a fluid;
- a piston dividing an interior of the cylinder into a first working chamber and a second working chamber, wherein the piston is displaceably disposed in the cylinder;
- a piston rod connected to the piston and emerging from the cylinder at one or more ends of the cylinder;
- at least one through-hole configured to place the first working chamber in fluid communication with the second working chamber;
- a shiftable weight configured to modify a passage cross-section of the at least one through-hole available for the passage of fluid due to a relative movement with respect to the at least one through-hole, wherein the shiftable weight is movably mounted relative to the at least one through-hole such that retardation of the moving piston or the moving piston rod causes enlargement of the passage cross-section of the at least one through-hole;
- an elastic element connected to the shiftable weight, wherein the elastic element is configured to push the shiftable weight into a rest position;
- and
- a stop, wherein the elastic element connected to the shiftable weight pushes the shiftable weight against the stop.
A seat belt unit, comprising:
- a seat belt;
- and
- a self-regulating damper unit, comprising:
- a cylinder filled with a fluid;
- a piston dividing an interior of the cylinder into a first working chamber and a second working chamber, wherein the piston is displaceably disposed in the cylinder;
- a piston rod connected to the piston and emerging from the cylinder at one or more ends of the cylinder;
- at least one through-hole configured to place the first working chamber in fluid communication with the second working chamber;
- and
- a shiftable weight configured to modify a passage cross-section of the at least one through-hole available for the passage of fluid due to a relative movement with respect to the at least one through-hole, wherein the shiftable weight is movably mounted relative to the at least one through-hole such that retardation of the moving piston or the moving piston rod causes enlargement of the passage cross-section of the at least one through-hole;
- an elastic element connected to the shiftable weight, wherein the elastic element is configured to push the shiftable weight into a rest position;
- and
- a stop, wherein the elastic element connected to the shiftable weight pushes the shiftable weight against the stop, wherein:
- the seat belt is directly or indirectly connected to the piston rod and the cylinder is connected to a higher-level assembly;
- or
- the seat belt is directly or indirectly connected to the cylinder and the piston rod is connected to the higher-level assembly.
Dependencies are inferred from the claim text.