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US 6,746,222 B2Granted
Bottom discharge valve
OwnerMilton Skillmaninventor
Life of this patent
Estimating the term…
Abstract
A bottom discharge valve is located on the bottom of the pump barrel just above the standing valve. The externally threaded pin end of the standing valve threads into the lower internally threaded portion of the bottom discharge valve. The externally threaded or pin end of the bottom discharge valve is large enough to allow the plunger cage or the traveling valves to actually stroke into the hollow portion of the neck or pin end of the disclosed bottom discharge valve.
Claims4
A bottom discharge valve comprising:
- a valve body formed by a generally elongated cylindrical member with an internally threaded first bore on a first end, external threads and an axially aligned second bore on the opposite second end, a plurality of through ports connecting said first and second bores, an axial blind bore entering said valve body form said first bore and having an internally threaded entrance, a profiled chamber, and at least one radial bore adjacent its blind end;
- a generally cylindrical cage member received in said blind bore;
- a ball dimensioned to be received in the cage;
- a valve seat dimensioned to be received in the blind bore of the valve body;
- and
- a retainer plug adapted to engage in the threaded entrance of the blind bore of the valve body to hold the cage, ball, and valve seat therein.
3 more elements
In combination with a downstroke pump, a bottom discharge valve comprising:
- a valve body formed by a generally elongated cylindrical member with an internally threaded first bore on a first end, external threads and an axially aligned second bore on the opposite second end, a plurality of through ports connecting said first and second bores, an axial blind bore entering said valve body form said first bore and having an internally threaded entrance, a profiled chamber, and at least one radial bore adjacent its blind end;
- a generally cylindrical cage member received in said blind bore;
- a ball dimensioned to be received in the cage;
- a valve seat dimensioned to be received in the blind bore of the valve body;
- and
- a retainer plug adapted to engage in the threaded entrance of the blind bore of the valve body to hold the cage, ball, and valve seat therein
- wherein said radial bore allows easier flow of fluid out of a pump barrel through the bottom discharge valve and also through a traveling valve whereby the greater fluid flow keeps the effective rod weight heavier on the downstroke, making the maximum and minimum loads on the pump drive assembly closer to each other.
4 more elements
Dependencies are inferred from the claim text.