Combined pressure and thermal safety valve

Details Combined pressure and thermal safety valve Combined pressure and thermal safety valve

1988-06-16

1991-10-29

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Valve or body therefor

Patent

active

D03212416

REFERENCES:
patent: D96691 (1935-08-01), Nelson
patent: D226431 (1973-03-01), Emburg, Jr.
patent: D233569 (1974-11-01), Miller
patent: D237360 (1974-08-01), Watts
patent: D242709 (1976-12-01), Schourup
patent: D242710 (1976-12-01), Schourup
patent: D260280 (1981-08-01), Compbell
patent: 1557250 (1925-10-01), Grandfield
patent: 2036391 (1936-04-01), Bradley
patent: 2722232 (1955-11-01), Roche, Sr.
patent: 3139103 (1964-06-01), Bottum
patent: 3368581 (1968-02-01), Glover, Jr.
patent: 3490473 (1970-01-01), Ehrens et al.
patent: 3556470 (1971-01-01), Ehrens et al.
A sales brochure of Hydro Systems Company, 3798 Round Bottom Road, Cincinnati, Ohio, 45244, Description: A pressure relief valve characterized by the "Pump Guard.RTM." trademark, printed in 1984.

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