Hydraulic fluid pump and retainer assembly for same
AssigneeGardner Denver Petroleum Pumps, LLC
InventorsRobert James Dyer, Chance Ray Mullins, Peter Ross Ehlers
Life of this patent
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Abstract
A fluid end assembly of a hydraulic fluid pump includes a housing having a bore, a removable valve cover closing the bore, and a retainer engaging the bore. The retainer includes a set screw bore that extends from a first side of the retainer to a second side of the retainer, opposite the first side. The fluid end assembly further includes a set screw. The set screw is threaded into the set screw bore from the first side of the retainer. The set screw is not removable from the second side of the retainer. The first side of the retainer is positioned adjacent to the valve cover.
Claims20
A fluid end assembly of a hydraulic fluid pump comprising:
- a housing having a bore;
- a removable valve cover closing the bore;
- a retainer engaging the bore, the retainer comprising a set screw bore that extends from a first side of the retainer to a second side of the retainer, opposite the first side;
- and
- a set screw threaded into the set screw bore from the first side of the retainer;
- wherein the set screw is not removable from the second side of the retainer, and
- wherein the first side of the retainer is positioned adjacent to the valve cover.
A method of assembling and preloading a removable valve cover within a fluid end assembly of a hydraulic fluid pump, the method comprising:
- inserting the removable valve cover into a bore of the fluid end assembly;
- threading a set screw into a set screw bore in a retainer, the set screw bore extending from a first side of the retainer to a second side of the retainer, opposite the first side;
- inserting the retainer into the bore;
- and
- adjusting the axial position of the set screw within the set screw bore to extend through a plane defined by the first side and to concurrently apply a preload to the removable valve cover.
A retainer assembly operable to hold a removable valve cover within a bore of a fluid end assembly, the retainer assembly comprising:
- a retainer comprising an external engagement feature operable to engage the bore and a set screw bore that extends from a first side of the retainer to a second side of the retainer opposite the first side;
- and
- a set screw threaded into the set screw bore from the first side of the retainer,
- wherein the set screw bore includes a threaded portion extending from the first side and a non-threaded portion extending from the threaded portion toward the second side.
Dependencies are inferred from the claim text.