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. 08, 2018
Filed:
Sep. 18, 2015
Applicant:
Lin Engineering, Morgan Hill, CA (US);
Inventors:
Ted T. Lin, Saratoga, CA (US);
Abdallah Samaha, San Jose, CA (US);
Assignee:
LIN ENGINEERING, INC., Morgan Hill, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 57/04 (2010.01); F16H 25/20 (2006.01);
U.S. Cl.
CPC ...
F16H 57/0497 (2013.01); F16H 25/20 (2013.01); F16H 25/2003 (2013.01); F16H 57/0464 (2013.01);
Abstract
A nut driven by a lead screw and stepper motor has an internal concave recess for holding high viscosity grease that is semi-solid at ambient temperature and spaced from the lead screw. Grease flow ensues with lead screw motion causing a slow flow of grease coating the lead screw with a thin coating of grease as the nut travels back and forth over the lead screw. The nut may be an anti-backlash nut or a single member nut with both having a concave recess about the lead screw for the grease.