Mushroom valve housing with fluid coolant circulation for internal combustion engines

A mushroom valve housing with fluid coolant circulation for internal combustion engines, comprising a cage and at least two pairs of legs or webs supporting at their end an annular valve seat containing an annular space for the said fluid coolant, and a valve guide incorporating an annular cavity for the said fluid coolant, separated by a longitudinal partition into at least two sections, namely a fluid coolant intake section and a fluid coolant return section, a fluid coolant passage leading to the said annular cavity and to the said annular space, respectively, being cut longitudinally in each of the said legs, the fluid coolant passages of two successive legs located on one and the same side with respect to the said partition opening into the bottom region of a same section, wherein one of the said two fluid coolant passages connected to a same section opens freely into that section whereas the other of the said two fluid coolant passages communicates directly with the other section, and the respective fluid coolant passages of two diametrically opposite legs communicate with a same section.