Rotational movement transmission device comprising a casing forming a winding path for a flexible shaft
AssigneeInderflex-Technoflex
InventorDenis Tores
Life of this patent
Estimating the term…
Abstract
The invention concerns a rotational movement transmission device comprising a flexible shaft and a casing inside which the shaft is housed, said casing being formed from a hollow body of plastic material whose internal diameter is arranged to allow the rotation of said shaft inside said casing, the wall of the body having a variable thickness so that at least part of the casing has an internal surface comprising corrugations extending longitudinally. The invention also concerns an adjustment system for a motor vehicle seat comprising such a transmission device.
Claims25
A rotational movement transmission device comprising a flexible shaft and a casing inside which the shaft rotates, the casing being formed from a hollow body of plastic material whose internal diameter is arranged to allow the rotation of the shaft inside a length of the casing, the wall of the body having a variable thickness so that at least part of the casing has an internal surface that is continuous and comprises corrugations extending longitudinally, wherein the internal diameter has a cylindrical cross-section along the length of the casing.
A motor vehicle seat adjustment system comprising:
- at least one vehicle seat adjustment runner;
- an actuator having at least one revolving part;
- and
- a transmission causing movement along said adjustment runner in response to operation of said actuator, said transmission including a rotating shaft inside a length of casing, said casing having an external surface and an internal surface, both having cylindrical cross-sections along said length, wherein said casing has a wall thickness that varies along said length providing a winding path for said rotating shaft to limit vibrations of said shaft during its rotation.
A rotational movement transmission device comprising:
- a shaft;
- and
- a casing that houses the shaft which operably rotates within a length of the casing, the casing having a longitudinal centerline axis, the casing having an internal surface, an external surface and differing wall thicknesses therebetween, the internal surface having a cylindrical cross-section along the length;
- the thicker wall sections of the casing internally projecting adjacent the shaft to deter shaft vibrations and the thicker wall sections of the casing not internally projecting past the centerline axis of the casing.
A rotational movement transmission device comprising:
- a shaft;
- a casing that houses the shaft which operably rotates within a length of the casing, the casing having a longitudinal centerline axis, the casing having an internal surface, an external surface and differing wall thicknesses therebetween, the differing wall thickness providing internally projecting portions adjacent the shaft to deter shaft vibrations, the projecting portions not internally projecting past the centerline axis of the casing;
- and
- wherein sections of the casing having the projecting portions are separated by longer longitudinal sections of the casing wherein the wall thickness is substantially constant, the projections being alternately formed on diametrically opposite sides of the internal surface along the length creating a winding path for the shaft inside the casing.
Dependencies are inferred from the claim text.