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Hydrometer for determining coolant fluid antifreeze concentration

  • US 5,284,056 A
  • Filed: 05/07/1993
  • Issued: 02/08/1994
  • Est. Priority Date: 10/24/1991
  • Status: Expired due to Fees
First Claim
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1. A hydrometer for determining coolant fluid antifreeze concentration, comprising:

  • (a) a hollow housing having a pair of spaced openings for inflow and outflow of coolant fluid to and from said housing;

    (b) a transparent hollow view dome having an interior and an exterior and being mounted upon and extending above said housing with said interior in flow communication with said housing;

    (c) a plurality of float elements of different specific gravities;

    (d) a pair of spaced longitudinal rails disposed above said housing and connected to and extending vertically along a portion of a sidewall of said transparent view dome on said interior of said view dome to define a longitudinal channel, said spaced longitudinal rails defining a narrow slot therebetween along the extent of said channel for establishing flow communication with said interior of said view dome, said longitudinal rails having predetermined cross-sectional shapes providing said longitudinal channel with a predetermined cross-sectional shape for movably containing said float elements and for restricting said float elements to only substantially vertical longitudinal movement relative to said transparent view dome and for visual observation from said exterior thereof; and

    (e) means for defining a dam in the housing between and spaced from said openings of said housing and below said view dome and being capable of obstructing the path of coolant fluid flow directly between said openings so as to cause deflection of coolant fluid flow into and from said transparent view dome and said longitudinal channel.

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