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Reservoir fluid heating devices and methods of heating

  • US 8,867,907 B2
  • Filed: 10/12/2012
  • Issued: 10/21/2014
  • Est. Priority Date: 10/12/2012
  • Status: Expired due to Fees
First Claim
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1. A heater assembly for a fluid reservoir, the heater assembly comprising:

  • an outer housing coupled to a fluid reservoir opening;

    an inner tubular member disposed within the outer housing, the inner tubular member having a central passageway therethrough, a lengthwise portion of the central passageway having a larger diameter than the fluid reservoir opening;

    wherein an annulus is formed between the outer housing and the inner tubular member; and

    a heating device coupled to a lower end of the outer housing and having heating elements which extend upwardly into the central passageway of the inner tubular member.

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