Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1997-11-11
2000-04-11
Graham, Gary K.
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
1525048, 15250001, 1525044, 15250351, B60S 104
Patent
active
06047436&
ABSTRACT:
An improved windshield wiper system having a cumulative ozone indicator (20) disposed in proximity to a wiper blade (10) which gives a visual cue when the wiper blade (10) should be replaced. The exposure to a predetermined amount of ozone causes the indicator (20) to change its color and thus communicate to the vehicle operator that it is time to change wiper blade (10). Rather than changing color the indicator (20) can be a pop up device which can be observed by the vehicle operator. To allow a reaction with ozone but to prevent damage from contact with a liquid the indicator (20) is covered with a gas permeable and liquid impermeable material.
REFERENCES:
patent: 4243631 (1981-01-01), Ryerson
patent: 4772560 (1988-09-01), Attar
patent: 4849178 (1989-07-01), Azuma
patent: 4859607 (1989-08-01), Lambert et al.
patent: 5349718 (1994-09-01), Gibbon
Leichnitz, "Detector Tube Handbook", 4th Edition, p. 126, Aug. 1979.
Bause Daniel E.
Buttery Dave
Dondero Russell A.
Jones Gordon W.
Rohrbach Ronald P.
Aldag Andrew
Allied-Signal Inc.
Graham Gary K.
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