Rotating joint for aerial ladders

Details Rotating joint for aerial ladders Rotating joint for aerial ladders

1994-02-22

1995-11-28

Briggs, William

Electrical connectors

Interrelated connectors relatively movable during use

Movement about axis

439 22, H01R 3500

Patent

active

054702364

ABSTRACT:
The apparatus is a rotating electrical coupling for use at the base of an aerial ladder which furnishes water, hydraulic controls and electrical lines to the top of the rotating ladder. The electrical coupling uses multiple, concentric, printed circuit type conductive bands oriented in a single plane and wiper contacts held in contact with the bands. The entire structure is located within a compartment within which can also be placed insulating liquids or gases to prevent corrosion and deterioration of the rotating electrical contacts.

REFERENCES:
patent: 2770475 (1956-11-01), Rafferty
patent: 3181715 (1965-05-01), Olson
patent: 3797862 (1974-03-01), Letterman
patent: 3905450 (1975-09-01), Persson
patent: 4098526 (1978-07-01), DuBois
patent: 4175809 (1979-11-01), Dusko
patent: 4186763 (1980-02-01), Ferguson
patent: 4487435 (1984-12-01), Yamatani
patent: 4605096 (1986-08-01), Bishop
patent: 5035448 (1991-07-01), Seabrook et al.

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