Columnar hydraulic tappet
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United States of America Patent
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-
Feb 19, 2019
Grant Date -
Nov 30, 2017
app pub date -
Jan 5, 2016
filing date -
Dec 11, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A columnar-type hydraulic tappet, provided with a housing, a plunger moving axially with respect to the housing being mounted in an inner cavity of the housing, a high pressure cavity used for a hydraulic medium extending between a lower end surface of the plunger and a lower side of the housing, a first ring groove being arranged below a head portion of the plunger, a second ring groove being arranged at a central portion of the plunger, a plunger central wall being between the first ring groove and the second ring groove, the second ring groove being a concave wide ring groove, wherein at least one plunger oil inlet hole being arranged on the plunger concave wide ring groove or the plunger central wall, a bottom portion edge of the plunger oil inlet hole containing flanging facing towards an inner cavity of the plunger.
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