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Title:
ROTARY JOINT
Document Type and Number:
WIPO Patent Application WO/2014/017550
Kind Code:
A1
Abstract:
A lip seal (12) serving as a gap sealing part for selectively sealing only a flow of fluid in the downstream direction while a sliding gap (G1) in which a fixed shaft part (8a) fits into a fitting hole (7a) provided in a housing member (7) allows axial movement of the fixed shaft part (8a), is provided in said sliding gap (G1). A narrowing part (18) provided at a narrowing hole (18c) which has a flow path diameter (d2) smaller than the flow path inner diameter (d1) of a fixed flow path (8f) and is provided upstream of the end part of the fixed flow path (8f) is also provided in the sliding gap (G1). As a result, fluid flowing downstream through the narrowing part (18) generates a differential pressure, whereby the fluid within the sliding gap (G1) is made to flow to the fixed flow path (8f), and is discharged along with contamination (20) in the fixed flow path (8f).

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Inventors:
MITOMA YOSHIKAZU (JP)
Application Number:
PCT/JP2013/070078
Publication Date:
January 30, 2014
Filing Date:
July 24, 2013
Export Citation:
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Assignee:
RIX CORP (JP)
International Classes:
F16L27/08; B23Q11/10
Foreign References:
JP2012092955A2012-05-17
JP2007085408A2007-04-05
JP2008261405A2008-10-30
JP2002195416A2002-07-10
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Aoki 篤 (JP)
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