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:
Mar. 09, 1976
Filed:
Aug. 05, 1974
Simon L Engel, Mountain View, CA (US);
Robert A McFall, East Peoria, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
An apparatus for modulating a high energy beam such as a laser beam comprising a rotor having a plurality of circumferentially spaced selectively shaped openings formed in a periphery thereof and adapted to rotate in the path of said high energy beam for permitting modulated portions of said beam to pass through to a work piece. Impeller blades are integrally formed on the rotor to provide a supply of cooling air that is pumped axially inward and directed radially outward through a space between the rotor and end shroud positioned thereover. The shroud contains a plurality of vanes formed to direct the cooling air against the peripheral portion of the rotor exposed to the laser beam to effect cooling thereof. The periphery is also provided with a reflective surface adapted to reflect the impinging portions of the beam to a beam trap to reduce the heating effect of the beam on the rotor.