THERMOSTAT DEVICE AND METHOD FOR MANUFACTURING THERMOSTAT DEVICE

In a fuel cell cooling device, sliding damage to a piston and the deterioration of sealing performance are prevented despite using a simple structure in which a portion sliding with the piston is made of a brass bush and a simple and inexpensive method of setting the assembly of the brass bushing to...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	NISHIMURA Tetsuya, KOMATSU Hitoshi
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACTUATING-FLOATS BASIC ELECTRIC ELEMENTS BLASTING COCKS COOLING OF INTERNAL-COMBUSTION ENGINES COOLING OF MACHINES OR ENGINES IN GENERAL DEVICES FOR VENTING OR AERATING ELECTRICITY ENGINE PLANTS IN GENERAL ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY STEAM ENGINES TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	In a fuel cell cooling device, sliding damage to a piston and the deterioration of sealing performance are prevented despite using a simple structure in which a portion sliding with the piston is made of a brass bush and a simple and inexpensive method of setting the assembly of the brass bushing to a press-fitted state by light press-fitting and ball burnishing. Provided is a stainless steel cylindrical guide member (32) slidably holding a stainless steel piston (11a) provided at the open end of a bottomed cylindrical case (31) containing a thermal expansion body and moving forward and backward according to the expansion and contraction of the thermal expansion body. A brass bushing (33) is fitted into the inner peripheral portion of the cylindrical guide member (32) by light press-fitting and subjected to precise finishing on the inner peripheral surface, for example, by ball burnishing, to be expanded radially by the pressure from the inside and press-fitted.