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:
Feb. 16, 2010
Filed:
Jun. 22, 2004
Geoffrey Bishop, Hartville, OH (US);
Carl Ribaudo, Jackson Township, Stark County, OH (US);
Ryan Evans, Jackson Township, Stark County, OH (US);
Richard Borowski, Canton, OH (US);
Geoffrey Bishop, Hartville, OH (US);
Carl Ribaudo, Jackson Township, Stark County, OH (US);
Ryan Evans, Jackson Township, Stark County, OH (US);
Richard Borowski, Canton, OH (US);
The Timken Company, Canton, OH (US);
Abstract
The performance of a worm assembly seal is improved by (1) the use of a hardened steel worm with a bronze worm gear; (2) a tribological coating on one or both of the worm thread or spiral and the gear teeth; 3) a tribological coating on one or both of the input or output shaft or shaft sleeves; or (4) a tribological coating applied to the worm thread, the gear teeth, the input and output shafts or shaft sleeves, or combinations thereof. In each of the approaches, the worm, worm gear, and input and output shafts or shaft sleeves can have surface finishing treatments. Additionally, in each of the three approaches, carbon or carbon/nitrogen concentration gradients can be added to the worm.