US 11,852,135 B2
Retainer nut assembly for pump and methods
James A. Barnhouse, Jr., Spring, TX (US)
Assigned to SPM Oil & Gas Inc., Fort Worth, TX (US)
Filed by SPM Oil & Gas Inc., Fort Worth, TX (US)
Filed on Dec. 17, 2021, as Appl. No. 17/554,793.
Prior Publication US 2023/0193896 A1, Jun. 22, 2023
Int. Cl. F04B 53/00 (2006.01); F04B 19/22 (2006.01)
CPC F04B 53/00 (2013.01) [F04B 19/22 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A retainer nut assembly for a pump system fluid end, comprising:
a plug comprising a pair of blades separated by edge cuts,
a blade, of the pair of blades, comprising an arcuate face;
a mid-cap comprising a pair of flange segments;
a cover cap configured to be positioned adjacent the mid-cap,
the cover cap including only a pair of extensions that are formed at a peripheral edge of a body of the cover cap and are separated by cut outs, and
the pair of extensions being configured to align with the pair of blades while a flange segment, of the pair of flange segments, is angularly offset from the pair of extensions and the pair of blades; and
a fastener configured to secure the retainer nut assembly together.