Combination oil pressure regulator and low oil pressure detector

Details Combination oil pressure regulator and low oil pressure detector Combination oil pressure regulator and low oil pressure detector

1989-03-20

1990-06-12

Smith, Leonard E.

Pumps

With signal, indicator, or inspection means

417 44, 417307, 137509, 200 82R, 184 64, F04B 3902, F16K 3700

Patent

active

049328417

ABSTRACT:
A combination oil pressure regulator and low oil pressure indicator for regulating the maximum oil pump pressure of a refrigerant compressor, and for providing a signal or indication when the oil pressure falls below a predetermined minimum value. The position of a piston in a housing is controlled by opposing forces provided by the oil pressure to be monitored and by a compression spring. When the oil pressure reaches a predetermined maximum value, relief apertures in the piston and housing establish a pressure relief path to the compressor crank case. When the oil pressure drops below a predetermined minimum value, the piston contacts and electrically grounds an electrically conductive element, providing a signal for associated control.

REFERENCES:
patent: 1309362 (1919-07-01), Lehmann
patent: 2809248 (1957-10-01), Frakes
patent: 3026387 (1962-03-01), Ashbaugh
patent: 3239624 (1966-03-01), Clason
patent: 3239625 (1966-03-01), Clason
patent: 3644915 (1972-02-01), McBurnett
patent: 4278856 (1981-07-01), Owens
patent: 4423751 (1984-01-01), Roettgen
patent: 4468170 (1984-08-01), Hanset
patent: 4586875 (1986-05-01), Aman, Jr.
patent: 4635671 (1987-01-01), Viegas
patent: 4711266 (1987-12-01), Lieber
patent: 4740140 (1988-04-01), Benson
patent: 4763688 (1988-08-01), Morris

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