High-low indicator

Details High-low indicator High-low indicator

1994-08-29

1997-01-07

Hepperle, Stephen M.

Fluid handling

With indicator, register, recorder, alarm or inspection means

Plural

137458, 1374925, 137557, F16K 1700

Patent

active

055906850

ABSTRACT:
An indicator for a pilot, particularly a two-line pilot to visually indicate whether a pilot has responded to a pressure condition within a flowline which pressure condition is outside a predetermined range. The visual indication also indicates whether the pressure condition is above or below the predetermined range.

REFERENCES:
patent: 907103 (1908-12-01), Bowman
patent: 3042057 (1962-07-01), Zorgdrager et al.
patent: 3878863 (1975-04-01), Snyder
patent: 4091832 (1978-05-01), Snyder et al.
patent: 4116215 (1978-09-01), Muchow
patent: 4523602 (1985-06-01), Snyder
patent: 4559970 (1985-12-01), Taylor et al.
patent: 5213133 (1993-05-01), Ellett
patent: 5341837 (1994-08-01), Johnson
Trade Publication: Otis Surface Safety Equipment & Services; 1980; p. 43.
Trade Publication: Otis Surface Safety Equipment and Systems; Date Unknown; pp. 38, 39.
Product Bulletin: Baker CAC High or Low Pressure Pilot Model HL-2; 1987; p. 5.

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