VISCOUS MATERIAL DISPENSER PISTON

A piston assembly for use in a viscous material dispenser is disclosed. The assembly has a main body with an axial bore for receipt of a push rod. The body has a face including an annular recess and an endless lip surrounding the recess. A camming washer is disposed at least in part in the recess. T...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	HERMAN, TIMM
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	APPARATUS FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL BLASTING CYLINDERS ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS PISTONS SEALINGS SPRAYING OR ATOMISING IN GENERAL THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A piston assembly for use in a viscous material dispenser is disclosed. The assembly has a main body with an axial bore for receipt of a push rod. The body has a face including an annular recess and an endless lip surrounding the recess. A camming washer is disposed at least in part in the recess. The washer includes a perimeteral camming surface engageable with the lip. The body and washer are connected together for limited relative axial movement when the piston assembly is advanced against material in a cartridge to dispense such material. The relative movement is effective to cause the camming surface to force the lip outwardly into tight engagement with a wall of such a cartridge.