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:
May. 16, 2006
Filed:
Apr. 29, 2004
James N. Ziemer, Martinez, CA (US);
Susan M. Abernathy, Hercules, CA (US);
John M. Rosenbaum, Richmond, CA (US);
Stephen J. Miller, San Francisco, CA (US);
Mark E. Okazaki, Alameda, CA (US);
James N. Ziemer, Martinez, CA (US);
Susan M. Abernathy, Hercules, CA (US);
John M. Rosenbaum, Richmond, CA (US);
Stephen J. Miller, San Francisco, CA (US);
Mark E. Okazaki, Alameda, CA (US);
Chevron U.S.A. Inc., San Ramon, CA (US);
Abstract
This invention is directed to a method of operating a wormgear drive at high energy efficiency comprising filling an oil reservoir with a wormgear lubricant comprising an isomerized Fischer-Tropsch derived distillate fraction having a low traction coefficient and operating the wormgear drive with the filled oil reservoir at an equilibrium temperature between 20 and 225 degrees C. This invention is also directed to a process for reducing the traction coefficient of a higher-traction coefficient lubricating base oil by blending it with an isomerized Fischer-Tropsch derived distillate fraction. This invention is also directed to a wormgear lubricant comprising an isomerized Fischer-Tropsch distillate fraction and between 2 and 50 weight percent thickener.