JOINT

WIPO Patent Application WO/2012/120751

A1

A joint (10) interposed in a pilot oil passage (4) by means of a relay passage (12) provided in a joint main body (11), wherein a housing part (13) is formed in the relay passage (12) of the joint main body (11), and a valve structural body (30), in which a check valve (300) is formed from one aperture end to the other aperture end, is provided in the housing part (13), and a bypass space (60) which communicates with the interior of the valve structural body (30) via a constricting hole (33) is formed between the outer peripheral surface of the valve structural body (30) and the inner peripheral surface of the housing part (13). When the check valve (300) is closed, fluid circulates between one aperture end and the other aperture end of the valve structural body (30) through the constricting hole (33) and the bypass space (60).

TAJIMA MASAYUKI (JP)
HORI SHUUJI (JP)
AKASHI MITSUMASA (JP)
CHIKUGO HIROYUKI (JP)
NOHARA TAKUYA (JP)

PCT/JP2011/079674

September 13, 2012

December 21, 2011

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KOMATSU MFG CO LTD (JP)
TAJIMA MASAYUKI (JP)
HORI SHUUJI (JP)
AKASHI MITSUMASA (JP)
CHIKUGO HIROYUKI (JP)
NOHARA TAKUYA (JP)

F16L55/00; F16K47/10

JPH06300150A	1994-10-28
JPH04366078A	1992-12-17
JPH0649868U	1994-07-08
JPH0625675U	1994-04-08
JPH0550287U	1993-07-02
JPS5491736U	1979-06-28

SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)

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