Internal pressure type expansion piston

Internal pressure type expansion piston

  • CN 2,392,006 Y
  • Filed: 06/23/1999
  • Issued: 08/16/2000
  • Est. Priority Date: 06/23/1999
  • Status: Active Grant
First Claim
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1. internal pressure type expansion piston, mainly form by piston main body (1) and sealed colloid (2), it is characterized in that sealed colloid (2) is fixed on the piston main body (1) by gland (3), between sealed colloid (2) and the piston main body (1) annular space (4) is arranged, annular space (4) communicates with the cylinder sleeve inner chamber of plunger pump through passage (5).

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