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:
Jul. 16, 1991
Filed:
May. 17, 1990
Peter R Perzl, Furstenfeldbruck, DE;
Heraeus Holding GmbH, Hanau am Main, DE;
Abstract
A gas laser has a closed gas flow channel in which a gas flows at high velocity through a discharge chamber, the gas discharge burning between at least two electrodes extending transversely of the gas flow. A cross-current blower for maintaining the gas flow has an axis of rotation which runs parallel to the optical axis and buckets are disposed substantially free-standing such that the gas stream flows twice through the bucket wheel, the delivery side of the blower being separated from the intake side at the inner wall of the gas flow channel by a baffle body extending in direction of the axis of the blower and reaching the outer edges of the buckets. To reduce turbulence occurring on the delivery side of the blower in the vicinity of the inner wall of the flow channel and to achieve a high pressure difference between the intake and delivery side with a stable characteristic, a side channel branches off from the gas flow channel at the inner wall on the delivery side, the flow baffle body forming the outer wall of the side channel and the side channel returning the branched-off gas stream to the blower buckets. The inner wall of the side channel is formed by an additional baffle body extending in the same direction as the axis of the blower.