ROTARY JOINT

WIPO Patent Application WO/2020/137049

A1

Provided is a rotary joint capable of suppressing an increase in the total length thereof in the axial direction even when the number of ports is increased. Mechanical seal devices 7 of a rotary joint 1 each include: a first shaft-side seal ring 71 and a second shaft-side seal ring 72 that are attached to a shaft body 5; and a first case-side seal ring 73 and a second case-side seal ring 74 that are attached to a case body 2. A first communication channel 41 that defines an annular space A and that connects a first outer channel 31 and a first inner channel 61 is formed between a first sliding section 77 of the first shaft-side seal ring 71 and the first case-side seal ring 73 and a second sliding section 78 of the second shaft-side seal ring 72 and the second case-side seal ring 74. A second communication channel 42 that defines the annular space A and that connects a second outer channel 32 and a second inner channel 62 is formed between the first sliding section 77 and the second sliding section 78, the first sliding section 77 being provided in one of the mechanical seal devices 7 adjacent in the axial direction, and the second sliding section 78 being provided in the other.

JPS5822583	[Title of the device] Pipe connecting device
JPH02190698	NIPPLE
WO/2011/117898	SWIVEL-TYPE COUPLING DEVICE FOR A RADIATOR

SUZUKI OSAMU (JP)
OKUNISHI YASUYUKI (JP)
MATSUI SHUHEI (JP)
ISHIJIMA MASANAO (JP)

PCT/JP2019/037570

July 02, 2020

September 25, 2019

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NIPPON PILLAR PACKING (JP)

F16L27/08; F16L39/04; F16L39/06

JP2012092955A	2012-05-17
JPS5849086U	1983-04-02
JP2009168068A	2009-07-30

SUNCREST PATENT AND TRADEMARK ATTORNEYS (JP)

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