Fluid circulating pump

Details Fluid circulating pump Fluid circulating pump

1980-02-26

1982-03-16

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

361 1, 308 1A, 340682, 310 68B, 200 614, 116208, H02H 708

Patent

active

043204317

ABSTRACT:
Fluid-cooled electrical apparatus having a new and improved pump for circulating the fluid within the apparatus. The pump has a motor portion in fluid communication with a pump portion, non-electrically conductive bearings supporting a common shaft between the two portions, and means for detecting shaft displacement due to bearing wear. Electrically conductive contact rings disposed within recesses in the bearings' sleeve and thrust surfaces complete an electric connection with the shaft in the event of bearing wear. Circuit means connected to the electrically conductive contact rings deenergizes the motor when the contact rings detect predetermined bearing wear.

REFERENCES:
patent: 449411 (1891-03-01), Hannah
patent: 1284701 (1918-11-01), Junggren
patent: 3108264 (1963-10-01), Heindo
patent: 3176286 (1965-03-01), Dschen
patent: 3508241 (1970-04-01), Potter
patent: 3897116 (1975-07-01), Carpenter
patent: 4057365 (1977-11-01), Colmer

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