Adjustable hydrometer

Details Adjustable hydrometer Adjustable hydrometer

2009-04-29

2011-10-25

Caputo, Lisa (Department: 2855)

Measuring and testing

Specific gravity or density of liquid or solid

Float operated indicator

C073S434000, C073S451000, C073S433000

Reexamination Certificate

active

08042389

ABSTRACT:
A hydrometer, hydrometer kit, and method of measuring the salinity/density or the salinity/specific gravity of a liquid are provided. The hydrometer may include a box structure comprising side walls and a bottom. At least a portion of one of the side walls may be substantially transparent. A buoyant indicator member may be pivotably disposed about an axis within the box structure. The indicator member may pivot about the axis when the box structure is filled with a liquid. A salinity/density scale or salinity/specific gravity scale may be disposed on a surface of the box structure or a dial member. At least one adhesive member may be removably adhered to the indicator member by a user so that the hydrometer can be calibrated based on a reference solution having a predetermined salinity. The at least one adhesive member may increase or decrease the buoyancy of the indicator member. The kit may include the hydrometer and a container of the reference solution having a predetermined salinity.

REFERENCES:
patent: 3722292 (1973-03-01), Pietramale
patent: 6776040 (2004-08-01), Wong
patent: 2002/0194912 (2002-12-01), Tu

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