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US 10,473,223 B2Granted
Evacuation valve
AssigneeOil-Rite Corporation
InventorMichael J. Wech
Life of this patent
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Abstract
An evacuation valve for a metering device or pump for a liquid medium is disclosed. The valve includes a seal holder having an annular groove formed therein and an O-ring seal. The O-ring seal is positioned within the annular groove and provides an evacuation valve seal surface.
Claims7
An apparatus for metering a liquid medium, said apparatus comprising:
- an evacuation valve for a liquid medium metering device having an O-ring seal and a seal holder, wherein the evacuation valve is in removable communication with a cylinder open end;
- said seal holder comprising a unitary, one-piece construction;
- said seal holder consists of a body having an outer surface;
- said seal holder defining an annular groove formed in said outer surface;
- and
- said O-ring seal being positioned within said annular groove;
- wherein said O-ring is biased against said annular groove by said liquid medium when said apparatus is pumping said liquid medium.
4 more elements
Dependencies are inferred from the claim text.