Patent ID: 8430332

Claim:
A thermostatic valve for a fluid circulation circuit, comprising: a valve body delimiting orifices for the inlet and outlet of a fluid circulating through the valve body, a sleeve for regulating the circulation of the fluid through the valve body, wherein the sleeve defines a central longitudinal axis, wherein the sleeve can be moved relative to the valve body and wherein the sleeve includes a tubular body provided with at least one peripheral seal suitable for interacting by sealed contact with at least one seat that is fixed relative to the valve body in order to cut off a flow of fluid between two of the orifices, and a thermostatic element containing a heat-expandable material and including a fixed portion fixed to the valve body and a movable portion that can be moved in translation relative to the fixed portion in the direction of the central longitudinal axis of the sleeve under the effect of a variation of volume of the heat-expandable material, the sleeve being kinematically connected to the movable portion so that the movement of the movable portion relative to the fixed portion in the direction of the central longitudinal axis of the sleeve controls the movement of the sleeve relative to the at least one seat, wherein the body of the sleeve and the seal of the sleeve are respectively made of a thermoplastic material and an elastomer which are chosen to be successively injection molded in a mold so that, on leaving the mold after injection of the elastomer, the thermoplastic material and the elastomer adhere to one another by a chemical, physical or physico-chemical effect.