Injection moulded, manually operated, parti - al vacuum control valve housing

Housing having a number of radical inlet and/or outlet spigots adjacent to a cylindrical piston chamber is provided during injection moulding with annular lips which are flush with the inner wall of the chamber and the lips are subsequently deformed radially outwardly into bell mouthed lisp using a...

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Bibliographische Detailangaben
1. Verfasser:	SCHLICK,HORST
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ACTUATING-FLOATS AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BLASTING COCKS DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TAPS THERMAL INSULATION IN GENERAL TRANSPORTING VALVES WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	Housing having a number of radical inlet and/or outlet spigots adjacent to a cylindrical piston chamber is provided during injection moulding with annular lips which are flush with the inner wall of the chamber and the lips are subsequently deformed radially outwardly into bell mouthed lisp using a heated tool whereby the wear is reduced between the rubber seals on the piston and the edges adjacent the spigots.