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Device for controlling incoming/outgoing of water flow of a sprinkler

  • US 5,360,172 A
  • Filed: 04/28/1994
  • Issued: 11/01/1994
  • Est. Priority Date: 04/28/1994
  • Status: Expired due to Fees
First Claim
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1. A device for controlling incoming/outgoing of water flow of a sprinkler, comprising a control tube, a control pin fitted into said control tube for controlling water flow, a pushing block for urging said control pin to move to a lower opening position, a frame member with which said pushing block is slidably associated, and a spring for restoring said control pin to an upper closing position, wherein:

  • said control tube has a water incoming end and a water outgoing end, an outer surface of said control tube being formed with a rectangular recess and a pin chamber being disposed at a middle section of said recess and extends downward therefrom, said pin chamber having a first side wall formed with a water inlet, a second side wall formed with a water outlet, and a bottom wall formed with a communicating hole;

    said control pin has a substantially semispherical head section, a first projecting ring section formed with an annular groove and located at an upper section of said control pin, a second projecting ring section formed with an annular groove and located at a lower section of said control pin, and a third projecting ring section formed with an annular groove and located at said lower section of said control pin below said second projecting ring section, a water sealing ring being disposed in each annular groove;

    said pushing block has a bottom face formed with a depression, two lateral projecting ribs, and an inclined wall located in said depression;

    said frame member is formed with an elliptic hole and a rectangular peripheral groove surrounding said elliptic hole, Whereby said spring and control pin are fitted into said pin chamber of said control tube and said pushing block is fitted into said frame member from a bottom side thereof, and said frame member is affixed on said rectangular recess of said control tube, so that said pushing block is switchable to displace said control pin between said lower opening position and said upper closing position so as to control incoming/outgoing of water flow of the sprinkler.

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