Abstract: A thermostat comprises a case (1) forming an elbow through which extends a fluid passageway 2 comprising a fluid inlet region (22) and a fluid outlet region (21) and containing a thermostatic element (3). The thermostatic element (3) includes a fixed part (31), a movable part (32) which carries a closing device (4) cooperating with a seat (23), a bridge (5) in which the movable part (32) is slidable, and a spring (6) biasing the bridge (5) away from the closing device (4). The case (1) is in one piece; the fixed part (31) bears against the wall of the passageway (2); the inlet region (22) comprises inwardly extending projections (19) for blocking movement of the bridge (5) caused by the spring before mounting the thermostat on a support.

Abstract: This invention relates to a water temperature control device for a cooling system having a reduced number of parts. The water temperature control device circulates cooling water to a water pump through either a radiator or a bypass line depending on the temperature of the cooling water from the water jacket of automobile engine. The water temperature control device provides an improved thermostat seal and prevents piston release of a pellet assembly. The invention comprises a water temperature control device having a case main body formed with a cooling water inlet, a cooling water outlet and a bypass outlet. A valve means is elastically mounted by a spring supported to a frame within the interior of the case main body. A dome type bridge, which holds a front end of the piston of the thermostat, is formed at the interior of the water cooling outlet of the case main body. The front end portion is passed through a pierced hole at the bridge top portion.

Abstract: The present invention relates to a process for regulating the temperature of a fluid circuit comprising a thermostatic valve, which consists in maintaining a leak rate through the valve once the valve has been opened a first time in order to eliminate the temperature fluctuations of the fluid around a regulation temperature. Two thermodilatable elements with different expansion temperature thresholds are used. The invention further relates to a thermostatic valve intended to regulate the temperature of a fluid around at least one value and comprising at least a first thermodilatable element. The valve further includes a second thermodilatable element for maintaining a controlled leak rate as soon as the valve has been opened (a first time).

Abstract: A viewable thermostat device for providing visual confirmation of the proper operation of a thermostat in operating engines having a fluid coolant is provided by the utilization of a transparent thermoplastic housing having means for capturing the annular flange of the thermostat and maintaining the thermostat perpendicular to the direction of flow of the coolant while allowing a visual confirmation of the proper operation of the thermostat. The transparent thermoplastic housing is preferably formed from a transparent polyurethane or polycarbonate plastic and may include curved surfaces for optically enhancing the visual inspection of the operation of the thermostat as well as covers or sleeves for protecting the clear plastic from exterior abrasion or dirt. The viewable thermostat device is applicable to in-line installation as well as installations directly connected to the engine block to provide visual confirmation of the proper operation of the thermostat during engine operation.

Abstract: A thermo-actuator has a steel rod, a guide member slidably mounted on the rod, a spool seal secured to the guide member, a heat conductive cylinder secured to the guide member, and wax pellets provided in the cylinder. The spool seal has a thin layer, so that the spool seal engages with the rod by a vacuum generated in the spool seal. The thickness of the spool seal is between 5% to 25% of the diameter of the steel rod.

Abstract: A liquid cooling circulation system for power and working machines (especially internal combustion engines) contains an air-separating tank (17) in a by-pass vent line (14) which is arranged at the high point (5') of the radiator inflow (5). A fill inlet (19) with connecting openings (5" and 17') to the radiator inflow (5) and air-separating tank (17) have a closure cover (20) which closes off these connecting openings with respect to one another. Excess pressure, vacuum and vent valves (21 and 22) are contained in the closure cover 20 which controls a line connection (25) to an atmospheric, or to an excess pressure expansion tank (27). A highly effective venting function in conjunction with an engine operation at strong rotational speed changes exists, since the line connection (25) is opened at least at low cooling medium temperature by means of a temperature-controlled vent valve (22).

Abstract: A pouch for the controlled release of active ingredients into an aqueous medium comprising liquid or solid active ingredients enclosed in a sealed envelope of cold water-insoluble polyvinyl alcohol.

Abstract: A thermostatic valve comprises a housing having a valve seat and opposed openings in its wall for circulating coolant; a spring surrounds the housing and a valve plate is positioned for abutment against and retraction from the seat with the valve plate supporting a thermostatic operating element which bears against the inner surface of the housing to activate the valve plate depending on the temperature of the coolant. The valve plate has elastic arms, each arm having a free end to interfit into one of the opposed openings in the housing. The valve plate is assembled with the housing by force fitting the elastic arms into the openings and a compressive spring surrounding the housing is held in position between the protruding flanks of the housing and the outwardly extending projection of the arms in the openings.