Patent ID: 6085984
Filing Date: 2000-07-11
Classification: G05D

Abstract:
A thermostatic cartridge for mixer taps including a hollow outside envelope having one or more openings constituting a first inlet for a first flow of fluid and one or more openings constituting a second inlet for a second flow of fluid with an inside passage through it discharging through an orifice constituting an outlet for a mixed fluid obtained by mixing of said fluid flows, an expandable thermostat, two valve seats each adjacent one inlet, a slide having two valves each cooperating with one of said seats to isolate each inlet from said outlet or to make it communicate therewith, fixed to a part of said thermostat that is mobile as a function of its temperature, a piston in which a region of said thermostat is housed and which, for a given adjustment, remains fixed as long as said seat adjoining said first inlet is not in contact with its valve, and a spring member urging said piston in the direction that moves said valve toward its seat, wherein said piston has at least one region sliding of which is guided by reversibly releasable guide means adapted to guide it as long as said seat adjoining said first inlet is not in contact with its valve, to eliminate said guidance when said valve bears on said seat to allow misalignment of said piston, of said thermostat and of said slide so that said valve is pressed against and sealed to said seat, and to re-establish said guidance when said valve leaves its seat.