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:
Jun. 25, 2002
Filed:
Sep. 28, 2000
Glenn W. Travis, Sunnyvale, CA (US);
Lam Research Corporation, Fremont, CA (US);
Abstract
An apparatus for dispensing media is provided. The apparatus has a rotating element having a cylindrical bore with a first end and a second end where the rotating element rotates the first end and the second end. The apparatus also includes a housing which has a fixed input port and a fixed output port where the housing encloses the rotating element. The first end and the second end of the rotating element intermittently switches between being aligned with the fixed input port and the fixed output port and being aligned with the fixed output port and the fixed input port, respectively. The apparatus also has a cylindrical piston contained within the cylindrical bore where the cylindrical piston has a length that is less than the cylindrical bore and switches from being closer to the fixed input port and the fixed output port.