Hydrostatic-pressure-sensitive actuator
AssigneeMichelin Recherche et Technique S.A.
InventorBernard Perrier
Life of this patent
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Abstract
An actuator, designed to be used in a pressurized enclosure, creates a relative movement between two parts, in response to a variation of hydrostatic pressure. The actuator includes a closed-cell foam block fixed to the two parts. The actuator may be used in the deployment of wheel units and antennas inside a cavity formed by a tire and a wheel rim.
Claims17
An actuator designed to be used in a pressurized enclosure to create in response to a variation of hydrostatic pressure a relative movement between two parts, the actuator comprising a closed-cell foam block fixed to the two parts.
A device designed to be located and fixed in an internal cavity formed by a tire and a wheel rim to acquire, process, and/or transmit information about a condition of the tire, the device comprising:
- a module;
- and
- an antenna with an inner wall adjacent to the module and an outer wall, the antenna being fixed to the module by one end, wherein the outer wall of the antenna is covered for part of its length by an elongate block or an elongate layer of closed-cell foam material that deforms under a service pressure P, thereby deploying the antenna.
Dependencies are inferred from the claim text.