Propeller ice protection system and method providing reduced sli

Details Propeller ice protection system and method providing reduced sli Propeller ice protection system and method providing reduced sli

1994-12-29

1998-01-20

Kwon, John T.

Fluid reaction surfaces (i.e., impellers)

With control means responsive to non-cyclic condition...

Temperature or icing condition responsive

219483, F04D 2918

Patent

active

057095329

ABSTRACT:
The invention relates to a propeller ice protection system having more evenly distributed sliding contact wear resulting in reduced maintenance, and a method of operating the system. According to the invention, polarity of a DC potential applied to the sliding contacts is periodically reversed in order to more evenly distribute brush wear. Specific hardware embodiments and various polarity reversing schemes are disclosed.

REFERENCES:
patent: 3455396 (1969-07-01), Cummings
patent: 3657514 (1972-04-01), Adams
patent: 4136295 (1979-01-01), Sweet
patent: 4292502 (1981-09-01), Adams
patent: 4386749 (1983-06-01), Sweet et al.
patent: 5045670 (1991-09-01), Gilliland

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