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:
Sep. 25, 2012
Filed:
Oct. 15, 2008
Jonathan J. Keihl, Versailles, OH (US);
Kevin G. Herzog, Eaton, OH (US);
Jonathan J. Keihl, Versailles, OH (US);
Kevin G. Herzog, Eaton, OH (US);
Lam Research Corporation, Fremont, CA (US);
Abstract
An EDM spindle assembly is provided comprising a pull stud, an electrode holder, a fluid seal, and a seal holder. A threaded outside diameter of the seal holder is threadedly engaged with a threaded inside diameter of a counter bore formed in the tail end of the electrode holder. A threaded outside diameter of the pull stud is threadedly engaged with the threaded inside diameter of the counter bore. The threaded inside diameter of the counter bore in the electrode holder comprises a longitudinal threading dimension that is sufficient to accommodate the entire longitudinal threaded outside diameter of the seal holder and a portion of the longitudinal threaded outside diameter of the pull stud sufficient to create threaded engagement, with the fluid seal positioned in the seal accommodating space.