PERMANENT ASSEMBLIES INCLUDING THERMOPLASTIC COMPONENTS AND METHOD OF ASSEMBLY

A piston rod guide and seal assembly comprises an annular thermoplastics piston rod guide which is formed with an internal recess receiving an elastomeric annular seal which is permanently locked in position by an inwardly deformed annular portion of the rod guide adjacent the seal. The inner end of...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	PEASLEY D,GB, ROBERTS M,GB
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CYLINDERS ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MEANS FOR DAMPING VIBRATION MECHANICAL ENGINEERING PISTONS SEALINGS SHOCK-ABSORBERS SPRINGS THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A piston rod guide and seal assembly comprises an annular thermoplastics piston rod guide which is formed with an internal recess receiving an elastomeric annular seal which is permanently locked in position by an inwardly deformed annular portion of the rod guide adjacent the seal. The inner end of the seal may be restrained by an axially outwardly directed spigot formed radially inwardly of and adjacent a shoulder at the inner end of the recess. The assembly is formed using a special-purpose tool by applying ultrasonic energy and mechanical pressure to a portion of the rod guide to soften the portion and upset it into clamping relationship with the other element. The tool comprises an ultrasonic probe having an annular groove for cooperation with the rod portion, and a skirt extending around the periphery of the groove.