(19)
(11) EP 0 223 528 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.10.1987 Bulletin 1987/41

(43) Date of publication A2:
27.05.1987 Bulletin 1987/22

(21) Application number: 86308716

(22) Date of filing: 07.11.1986
(84) Designated Contracting States:
DE GB IT NL

(30) Priority: 07.11.1985 US 795970

(71) Applicant: WEATHERFORD U.S. Inc.
 ()

(72) Inventors:
  • Draxler, Daniel R.
     ()
  • Woodward, Michael J.
     ()

   


(54) Oscillating spray apparatus


(57) An oscillating spray apparatus (8) comprises a first bar (l8) and a second bar (20) which are connected by a member (32) which carries a nozzle (48). The reaction force from the spray (46) moves the first bar (l8) and the second bar (20) to the left as shown in Figure l until the first bar (l8) is restrained. Movement of the second bar (20) continues under the influence of spray (46) until the spray (46) is vertical and thereafter due to the inertia of the second bar (20). This reverses the direction of the spray (46). The first bar (l8) and the second bar (20) then return to their initial positions where the cycle is repeated. The travel of the first bar (l8) can be limited by stops on the end of the first bar (l8) or by an external housing (40).







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