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. 05, 2000
Filed:
Jun. 18, 1998
Applicant:
Inventors:
Robert L Anderson, III, Scottsdale, AZ (US);
John Hose, Versailles, KY (US);
Assignee:
Speedfam-IPEC Corporation, Chandler, AZ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B24B / ;
U.S. Cl.
CPC ...
451262 ; 451261 ; 451286 ; 451288 ; 451269 ;
Abstract
In a polishing machine for simultaneous double-sided polishing of workpieces between upper and lower polish tables, the upper polish table has a hollow center telescopically receiving in a drive hub supported from below. The upper polish plate is suspended by a lifting rod from a double-ended main lifting cylinder having upper and lower ends secured to a frame extending from the lower polish table.