Fuel pump

Fuel pump

  • CN 101,344,057 B
  • Filed: 12/14/2007
  • Issued: 09/03/2014
  • Est. Priority Date: 12/15/2006
  • Status: Active Grant
First Claim
Patent Images

1. petrolift, there is the pump piston guiding in pumping cylinder, wherein, in having the gap area of pump piston, the guiding of pumping cylinder forms at least one leakage grooves, can discharge the leaked fuel occurring between pumping cylinder and pump piston by leakage grooves, it is characterized in that, in pump piston (13), be integrated with at least one frizing part (22), to wipe from the wall (21) of pumping cylinder (11) leaked fuel being gathered between pumping cylinder (11) and pump piston (13) off, described or the each frizing part (22) being integrated on pump piston (13) is gathered in the leaked fuel on pumping cylinder (11) wall (21) and is entered at least one leakage grooves (16) for wiping off, described or the each frizing part (22) being integrated on pump piston (13) is located in the region of pump piston (13), thereby its in when work without leakage grooves (15, 16), being integrated in frizing part (22) in pump piston (13) is located in a region of pump piston, thereby its in when work at lower dead centre up and down portion leakage grooves (16) direct neighbor.

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