BACKUP RING AND SEALING DEVICE

PROBLEM TO BE SOLVED: To secure sufficient sealing property, even when fluid pressure is in a continuous state or fluid pressure is low, without causing an event for considerably increasing manufacturing cost. SOLUTION: In this sealing device 100, a seal ring groove 101 is formed between surfaces mu...

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Bibliographische Detailangaben
Hauptverfasser:	ITO KENJI, FUTAMI TATSUYA
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CYLINDERS DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR ENGINEERING ELEMENTS AND UNITS FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MECHANICAL ENGINEERING PISTONS SEALINGS SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To secure sufficient sealing property, even when fluid pressure is in a continuous state or fluid pressure is low, without causing an event for considerably increasing manufacturing cost. SOLUTION: In this sealing device 100, a seal ring groove 101 is formed between surfaces mutually opposed to a cylinder tube 20 including a fitting part 21a and a collar 50 arranged in the fitting part 21a of the cylinder tube 20, an O-ring 110 is stored in the seal ring groove 101, and each backup ring 120 is interposed between both groove side surfaces 101a of the seal ring groove 101 and the O-ring 110. In the backup ring 120, a cut-out part 121 is formed to communicate a space partitioned between the backup ring 120 and the O-ring 110 with the outside when the backup ring 120 is brought into pressure contact with the groove side surfaces 101a of the seal ring groove 101. COPYRIGHT: (C)2011,JPO&INPIT