ROTARY POP-UP SPRINKLER

• US 3,724,757 A
• Filed: 07/27/1971
• Issued: 04/03/1973
• Est. Priority Date: 07/27/1971
• Status: Expired due to Term

• Current Assignee: Edwin J. Hunter
• Original Assignee: Edwin J. Hunter
• Inventors: Hunter, Edwin J.
• Primary Examiner(s): Schacher, Richard A.
• Application Number:
  US05/166,347
• Time in Patent Office: 616 Days
• Field of Search: 239/203,204,205,206
• US Class Current: 239/205
• CPC Class Codes: B05B 15/74 driven by the discharged fluid
• CPC Class Codes: B05B 3/0431 the rotative movement of the outlet elements being reversible B05B3/0445 takes precedence

Abstract

A sprinkler is provided with a pop-up nozzle rotatably supported on a housing keyed to a casing for axial nonrotatable movement between positions in which the nozzle is retracted or extended. The housing contains a water actuated motor coupled by gearing to the nozzle for rotation thereof. A seal is fixed to one end of the casing and sealingly surrounds the nozzle when the nozzle is retracted and stationary. When the nozzle is extended and rotating, the seal is disengaged therefrom and sealingly surrounds a part of the housing in stationary relation. The gearing has an internal seal which is protected by the nozzle and is located above the casing in the extended position of the nozzle to obviate flooding of the internal seal. This minimizes drag on rotation of the nozzle and reduces wear on the seals. The gearing coupling the motor and nozzle is alterable to obtain a predetermined arc of rotation of the nozzle.

Claims

1. A rotary pop-up sprinkler comprising:

a casing;

a nozzle body mounted for movement in the casing between a retracted position and an extended position;

means for rotating the nozzle body; and

a seal within the nozzle body, said seal being disposable above the casing in the extended position of the nozzle body for protecting the seal against flooding.

2. The sprinkler of claim 1 wherein said means includes gearing and a shaft to which the nozzle body is secured, and said seal surrounds the shaft.

3. The sprinkler of claim 2 wherein said gearing is contained in a housing which is movable with the nozzle body as a unit.

4. The sprinkler of claim 1 wherein said support contains a motor actuated by flow of water therethrough and through the nozzle, means coupling the nozzle and motor for rotation of the former by actuation of the latter, said nozzle being movable and disposable in a retracted position in a casing, said seal being mounted on the casing and sealingly engaged with the nozzle in the retracted position thereof, and means for introducing water pressure into the casing, said water pressure being effective to move the nozzle from retracted position and cause the nozzle to extend from the casing free of the seal.

5. The sprinkler of claim 4 wherein said nozzle has a substantially cylindrical body circumscribed by said seal and sealingly engaged therewith in the retracted position of the nozzle, and said support has a substantially cylindrical portion, said portion and body being coaxial and having substantially equal cross dimensions so that when the nozzle is extended free of the seal the seal circumscribes the cylindrical portion in sealing engagement therewith.

6. The sprinkler of claim 5 wherein said means coupling the nozzle and motor include gearing selectively alterable to provide a predetermined arc of rotation of the nozzle.

7. A sprinkler comprising:

a support;

a nozzle rotatably mounted on said support; and

a relatively movable seal sealingly engageable with said nozzle when the same is stationary and disengaged therefrom wheN the nozzle is rotating;

whereby drag on rotation of the nozzle is minimized.

8. The sprinkler of claim 7 wherein said seal is sealingly engaged with said support when disengaged from the nozzle, and said seal and support are mounted to be devoid of relative movement when sealingly engaged with each other;

whereby wear on the seal is minimized.

9. The sprinkler of claim 8 wherein said support is mounted in a casing for axial nonrotatable movement relative thereto, and said seal is fixed to the casing.

10. The sprinkler of claim 9 wherein said support and nozzle are movable as a unit for disposition thereof in retracted position in the casing and for extension of the nozzle from the casing in response to water pressure, and means for urging the unit into retracted position;

whereby the nozzle is disposed within the casing in the absence of said water pressure and extends from the casing when said water pressure is present.