Tangential fan with cutoff assembly and vibration control for el

Details Tangential fan with cutoff assembly and vibration control for el Tangential fan with cutoff assembly and vibration control for el

1999-09-21

2000-11-07

Scott, Jr., Leon

Coherent light generators

Particular active media

Gas

372 57, H01S 322

Patent

active

061446866

ABSTRACT:
A tangential fan and cutoff assembly for recirculating a lasing gas mixture has blade members, which vary in circumferential position stepwise from end to end, and/or a tapered anode assembly. The number of blade members can be constant or variable between ends. The circumferential position of blade members can shift monotonically or reversibly between ends. Blade members are stiffened by optimally selecting the number and placement of hub members to control the natural vibration frequency of the fan. Methods of forming tangential fans include casting, and machining from a solid block. Monolithic structures can be joined, typically by electron-beam welding. Casting, welding, and machining processes introduce no additional contaminants. Tangential fans produced have mechanical rigidity, accurate tolerances, and low contaminant concentrations. Blade members can be formed into air foil shapes.

REFERENCES:
patent: 4099143 (1978-07-01), Foster
patent: 4571730 (1986-02-01), Mizoughuchi et al.
patent: 4959840 (1990-09-01), Atkins et al.
patent: 5770933 (1998-06-01), Larson et al.
patent: 5771258 (1998-06-01), Morton et al.
patent: 5870420 (1999-02-01), Webb
patent: 6023486 (2000-02-01), Hofmann et al.

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