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:
Jan. 16, 2007
Filed:
Jul. 23, 2003
Adam Sean Harbison, Los Gatos, CA (US);
Scott Peterson, Scotts Valley, CA (US);
Bryan Riley, San Jose, CA (US);
Adam Sean Harbison, Los Gatos, CA (US);
Scott Peterson, Scotts Valley, CA (US);
Bryan Riley, San Jose, CA (US);
Xyratex Technology Ltd., Havant Hampshire, GB;
Abstract
An improved cleaning fluid supply housing assembly for a cascade-type substrate scrubber having a sliding piston configured with a flange with recesses so that the piston is out of contact with the rotating part of the brush core mandrel bearing assembly. Rather, the piston flange outer face only contacts the stationary outer race of the mandrel bearing. The water supply piston is also configured with a full bore to minimize the pressure on the end of the mandrel. A tolerance-controlled leak through the bearing is provided by the configuration of the piston flange to provide a flushing of the area in which wear might be a source of particle generation by a controlled tolerance leak upstream of the brushes. These features substantially eliminate the source of particle generation from contact wear and the contribution of such wear particles into the interface between the brush and the substrate surface being cleaned.