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Suction fitting with pump control device

  • US 5,167,041 A
  • Filed: 06/20/1990
  • Issued: 12/01/1992
  • Est. Priority Date: 06/20/1990
  • Status: Expired due to Term
First Claim
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1. For use in conjunction with a fluid circulation system in a tub or spa, a combination comprising:

  • a suction fitting for installation beneath fluid level in a tub or spa, to provide fluid communication between the tub or spa and a fluid circulation pump;

    pressure sensing means integral with the suction fitting, for sensing fluid pressure in the tub or spa during normal operation and for sensing reduced pressure immediately downstream of a blockage in the suction fitting; and

    means for controlling operation of the fluid circulation system in response to a condition in which fluid flow through the suction fitting is impeded, as detected by the pressure sensing means;

    whereby the possibility of damage or serious personal injury is minimized;

    and wherein the pressure sensing means includesa sensor tube extending through the suction fitting and having an opening into the tub or spa; and

    fluid communication means extending from the opening of the sensor tube to a region immediately downstream of the suction fitting, whereby the pressure sensing means can detect a reduced pressure immediately downstream of the blockage.

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