<p>A valve cover assembly for a pump. In an embodiment, the valve cover assembly comprises a first cylindrical member having a central axis and a first throughbore. In addition, the valve cover assembly comprises a second cylindrical member coaxially disposed within the first throughbore and rotatable relative to the first cylindrical member about the central axis between a first position and a second position. In the first position, the second cylindrical member is axially translatable relative to the first cylindrical member. In the second position, the second cylindrical member is axially fixed relative to the first cylindrical member.</p>
申请公布号
WO2010025246(A1)
申请公布日期
2010.03.04
申请号
WO2009US55185
申请日期
2009.08.27
申请人
NATIONAL OILWELL VARCO, L. P.;RILEY, ANDREW, DALE;WEAVER, RANDALL, FERRAIN