Rapidly mounted thermostat

A thermostat comprising in combination:

• a case in one piece forming an elbow and having an inlet end face for fixing to a support, said case having a wall defining an inner fluid passageway which includes a bend and extends through said case, said passageway having a fluid outlet region remote from said inlet end face and a fluid inlet region adjacent to said inlet end face, a thermostatic element disposed in said passageway and comprising a first part and a second part which are relatively movable, means for supporting said first part in a fixed position in said case, said second part extending from said first part in an upstream direction relative to fluid flow in said passageway, a seat provided in a narrowed region of said passageway, a closing device carried by said second part and cooperative with said seat, said second part being movable in translation relative to said first part for moving said closing device selectively away from and toward said seat to a position of contact with said seat, guide means for guiding said second part on the upstream side of said closing device, elastically yieldable means subjecting said guide means to a return force biasing said guide means in the upstream direction, said first part of said thermostatic element being supported in a region of said wall defining said passageway close to said bend and centered on said inlet region, said inlet region having projections extending into said inlet region of said passageway for connecting said guide means to said wall and blocking the movement of said guide means in the upstream direction produced by said elastically yieldable means, and said guide means carrying at least one tab extending in the upstream direction beyond said inlet end face when the thermostat is not mounted on the support and also extending transversely outwardly beyond walls of said projections, whereby, when said thermostat is fixed on said support, said at least one tab is urged by the support in the downstream direction in said passageway and the force exerted by said elastically yieldable means on said guide means is transferred from said projections to the support.