Pump and master valve circuit isolator apparatus

Details Pump and master valve circuit isolator apparatus Pump and master valve circuit isolator apparatus

1997-07-24

1999-01-19

Paladini, Albert W.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

239 70, 361191, 137820, G05B 1101

Patent

active

058616853

ABSTRACT:
A circuit isolator apparatus for use with pump or master valve circuits having a plurality of controllers connected thereto. One isolator apparatus is used in association with each controller. The isolator apparatus includes a pair of relays which allow only one controller to access the pump or valve circuit at a time to prevent feedback between controllers and damage to controllers due to incorrect phasing.

REFERENCES:
patent: 4078196 (1978-03-01), Thadani
patent: 4719532 (1988-01-01), Schneider
patent: 4852613 (1989-08-01), Tippetts et al.
patent: 5287888 (1994-02-01), Geiger
patent: 5414618 (1995-05-01), Mock et al.

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