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:
Feb. 26, 2013
Filed:
Oct. 08, 2009
Tsunehiko Yamazaki, Nagoya, JP;
Naoomi Miyakawa, Gifu, JP;
Tsunehiko Yamazaki, Nagoya, JP;
Naoomi Miyakawa, Gifu, JP;
Yamazaki Mazak Corporation, Aichi pref., JP;
Abstract
A laser processing unit includes a torch that is automatically mounted on a processing head. The torch has an assist gas chamber and a balance chamber, and the assist gas is supplied to the chambers. Constantly, equal pressures act on the both chambers, and an upward first force and a downward second force that act on a lens holder offset each other because pressure reception areas are equal. Gas is supplied to a gas spring chamber to provide a constant upward force to the lens holder. A driving device has an arm driven by a servomotor. The arm is in contact with a pin and the lens holder is moved to a predetermined position for automatically adjusting a focus position FC of a collective lens.