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Sprinkler device

  • US 4,971,256 A
  • Filed: 10/04/1988
  • Issued: 11/20/1990
  • Est. Priority Date: 10/04/1988
  • Status: Expired due to Fees
First Claim
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1. A rotary sprinkler device adapted to be communicated with a water line for the distribution of water therefrom, said device comprising a fluid inlet, a nozzle head, a body member disposed within said fluid inlet and said nozzle head, an interior chamber disposed within said body member, a bearing spindle extending into said chamber and communicating said fluid inlet with said nozzle head for directing fluid flow therethrough from said fluid inlet to said nozzle head, said spindle being at least partially disposed within said body member and mounted for relative rotation and axial movement between said bearing spindle and said body member, drive means responsive to fluid flow from said inlet through said bearing spindle for rotating said nozzle head, an internal annular sealing means disposed within said chamber about a first portion of said bearing spindle and extending axially between a second portion of said bearing spindle and a portion of said body member for preventing water flow through said bearing spindle from passing between adjacent surfaces of said bearing spindle and said body member, and biasing means having a predetermined load rate disposed within said chamber about said first portion of said bearing spindle and bearing against said sealing means for preloading said sealing means in compression between said second portion of said bearing spindle and said portion of said body member to maintain a continuous seal therebetween, said biasing means compressing upon the water pressure within said body member exceeding said load rate, whereupon the bearing friction between said body member and said bearing spindle is not affected by said biasing means.

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