Hydraulic valve device with annular check valve member

Hydraulic valve device with annular check valve member

  • CN 102,691,685 B
  • Filed: 03/22/2012
  • Issued: 03/10/2020
  • Est. Priority Date: 03/22/2011
  • Status: Active Grant
First Claim
Patent Images

1. A valve device comprising:

  • a valve body having a bore with an annular recess and having a first fluid port opening into the annular recess;

    an annular band formed from a strip having overlapping first and second ends, the band being located within the annular recess and having a normal state in which the band closes fluid communication between a first fluid port and an aperture, wherein pressure in the first fluid port causes the band to dimensionally contract, thereby providing a fluid path between the first fluid port and the aperture; and

    a stop attached to one of the valve body and the annular band for limiting contraction of the band.

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