Patent ID: 11920443
Assignee: FLOWCO PRODUCTION SOLUTIONS, LLC
Field: Computer technology (Electrical engineering)
Classification: CPC E  F  G  H  Y | IPC E  F  G  H

Claim 9:
10. A bypass plunger, comprising:
a monolithic hollow body that has first and second ends, wherein the monolithic hollow body includes:
a first hollow cylindrical portion located adjacent the first end of the monolithic hollow body and having a first inner diameter,
a second hollow cylindrical portion located inwardly from the first hollow cylindrical portion and having a second inner diameter that is greater than the first inner diameter, and
a third hollow cylindrical portion located inwardly from the second hollow cylindrical portion and having a third inner diameter that is smaller than the second inner diameter;
and
wherein a valve cage having a valve seat is integrally formed in the monolithic hollow body adjacent the second end;

a dart valve having a valve stem and a valve head, wherein the dart valve is slidably mounted on the monolithic hollow body such that the valve head is located within the valve cage and such that a sealing face of the valve head can seat against the valve seat of the valve cage; and
a retaining nut having one of external threads and internal threads, wherein the other of external threads and internal threads are formed on the second end of the monolithic hollow body, wherein at least one relieved space is provided on the external threads, wherein the retaining nut is secured to the monolithic hollow body by the external and internal threads and by at least one crimple that comprises a radially inwardly deformed portion of the monolithic hollow body or the retaining nut that extends into a relieved space on the external threads to prevent the retaining nut from moving relative to the monolithic hollow body, and wherein the retaining nut is configured to retain the valve head of the dart valve within the valve cage.