The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 2009
Filed:
Nov. 29, 2005
James C. Aday, McAlester, OK (US);
Lopek Drzewiecki, Edmonton, CA;
Michael J. Kubinski, Houston, TX (US);
Andrew Dale Riley, Eufaula, OK (US);
James C. Aday, McAlester, OK (US);
Lopek Drzewiecki, Edmonton, CA;
Michael J. Kubinski, Houston, TX (US);
Andrew Dale Riley, Eufaula, OK (US);
National-Oilwell, L.P., Houston, TX (US);
Abstract
Apparatus and method for applying radial compressive stress pre-loading to a cylinder liner. A cylinder housing is attached to a pump, and a cylinder liner is disposed within the cylinder housing. A fluid inlet in fluid communication with the annular space between the cylinder housing and cylinder liner is disposed on the cylinder housing. The annular space is filled with pressurizing fluid through the fluid inlet, which creates radial compressive stress pre-loading on the cylinder liner.