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Oscillating sprinkler

  • US 4,877,185 A
  • Filed: 12/31/1986
  • Issued: 10/31/1989
  • Est. Priority Date: 12/31/1986
  • Status: Expired due to Fees
First Claim
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1. An improved oscillating sprinkler, comprising a frame, a housing mounted on the frame and having a water inlet fitting to be connected to a source of water under pressure, a sprinkler tube mounted for oscillating movement on the frame and having a plurality of water outlets, water supply means disposed within the housing for supplying water from said inlet fitting to said sprinkler tube, an output shaft driven by water flowing in said water supply means, crank arm means operably connected to the sprinkler tube to oscillate said tube through a given amplitude, a pair of elliptical gears, one of said gears being connected to said output shaft and the other of said gears being operably connected to said crank arm means, said elliptical gears being constructed and arranged so that the variable speed output of said other gear balances the variable speed output of said crank arm means to thereby oscillate said sprinkler tube with a substantially uniform velocity throughout its amplitude of oscillating movement, and slip clutch means interconnecting the sprinkler tube and the frame, said slip clutch means having a locking position to transmit oscillating movement of said crank arm means to said sprinkler tube and being constructed and arranged to permit manual rotation of said sprinkler tube relative to the frame to thereby shift the spray pattern.

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