Adjustable bubbler sprinkler head

• US 4,131,234 A
• Filed: 08/12/1977
• Issued: 12/26/1978
• Est. Priority Date: 08/12/1977
• Status: Expired due to Term

• Current Assignee: L.R. Nelson Corporation (Robert Bosch GmbH)
• Original Assignee: L.R. Nelson Corporation (Robert Bosch GmbH)
• Inventors: Pescetto, James R.
• Primary Examiner(s): Saifer, Robert W.
• Application Number:
  US05/824,113
• Time in Patent Office: 501 Days
• Field of Search: 239/DIG. 1, 239/107, 239/457, 239/460, 239/542, 239/562, 239/583
• US Class Current: 239/457
• CPC Class Codes: A01G 25/023 Dispensing fittings for drip irrigation, e.g. drippers
• CPC Class Codes: Y10S 239/01 Pattern sprinkler

Abstract

A sprinkler head comprising an annular sprinkler body of molded plastic having a tubular member of molded plastic snapped into operative fixed relation within the central portion thereof. A flow adjusting screw is threaded within the tubular member and has its head in adjustable flow restricting relation to inlet passages in the sprinkler body. Water flowing through the controlled inlet passages moves upwardly along the interior of an annular wall in the annular body, outwardly along an end wall of a molded plastic spray adjusting member threadedly mounted on the upper end of the tubular member, downwardly between the exterior of the annular wall and the interior of a peripheral wall of the adjusting member and then radially outwardly between cooperating flow pattern defining surfaces on the spray adjusting member and sprinkler body. The axial position of the spray adjusting member determines the spray pattern which is variable from a thick umbrella sheet pattern to a plurality of annularly spaced radially extending discrete streams.

Claims

1. A sprinkler head comprising:

an annular body having means on a lower portion thereof for fixedly securing the same to a supply member having a source of water under pressure communicated therewith;

said body having a tubular member therein defining an interiorly threaded opening extending axially in relation to said annular body;

an adjusting screw threadably mounted in said interiorly threaded opening, said screw having an enlarged head on the lower end thereof disposed in communicating relation to the water under pressure communicated with said body;

means within said body defining inlet passage means disposed in flow restricted relation with respect to said adjusting screw head whereby the axial position of said adjusting screw head determines the amount of flow of water through said inlet passage means;

said body having an annular wall disposed outwardly of said inlet passage means and extending upwardly therefrom for directing the flow of water passing through said inlet passage means upwardly along the interior thereof;

a spray adjusting member mounted on the upper end portion of said tubular member for axial adjustment with respect thereto;

said spray adjusting member having an upper end wall extending radially outwardly in a position above said annular wall so as to receive the water flowing upwardly therealong and direct the same outwardly;

said spray adjusting member having a peripheral wall extending downwardly from the periphery of said upper end wall in spaced relation to said annular wall so as to cause the flow of water directed outwardly by said upper end wall to pass downwardly between the interior of said peripheral wall and the exterior of said annular wall; and

cooperating downwardly facing surface means on the lower portion of said peripheral wall and upwardly facing surface means on said body for confining the water flowing downwardly between said peripheral wall and said annular wall into an outwardly directed spray pattern which can be varied depending upon the axial position of adjustment of said spray adjusting member with respect to said body.

2. A sprinkler head as defined in claim 1 wherein said spray adjusting member has a central opening extending axially therethrough, the upper end of said adjusting screw having an upwardly facing slot formed therein for receiving a turning tool movable downwardly through said central opening in said spray adjusting member.

3. A sprinkler head as defined in claim 1 wherein said spray adjusting member includes an inner annular portion, said inner annular portion having interior threads engaging exterior threads formed on the upper end of said tubular member whereby rotational movement of said spray adjusting member with respect to said tubular member will affect said axial adjustment.

4. A sprinkler head as defined in claim 3 wherein said tubular member is molded of plastic material separate from said body, said tubular member having a lower exterior surface means cooperating with an interior surface means in said body for enabling said tubular member to be moved axially with respect to said body and snapped into a fixed operative position wherein said exterior and interior surface means are in engagement and effectively prevent relative movement between said tubular member and said body.

5. A sprinkler head as defined in claim 4 wherein said exterior surface means includes a cylindrical surface having a radially outwardly extending bead on the lower extremity thereof and a pair of key portions extending radially outwardly therefrom in diametrically opposed relation, one of said key portions having a radial extent greater than the radial extent of the other of said key portions.

6. A sprinkler head as claimed in claim 5 wherein said interior surface means includes a cylindrical surface having a pair of keyways formed therein of a size to receive said pair of key portions and a bead receiving groove formed in the extremity thereof, said cylindrical surface having a plurality of annularly spaced axially extending slots communicating therewith, said axially extending slots defining said inlet passage means.

7. A sprinkler head as defined in claim 3 wherein said annular wall has an axially extending stop rib formed on the interior surface thereof, the inner portion of said adjusting member having a cooperating axially extending stop rib on the exterior thereof for limiting the rotational movement of said spray adjusting member with respect to said body to an arcuate extent less than 360°

.

8. A sprinkler head as defined in claim 1 wherein the upper end of said annular wall is formed with a plurality of annularly spaced radially extending slots.

9. A sprinkler head as defined in claim 1 wherein said downwardly facing surface means on said peripheral wall includes a downwardly facing radially extending annular surface having formed therein a multiplicity of annularly spaced radially extending semi-cylindrical recesses.

10. A sprinkler head as defined in claim 9 wherein said upwardly facing surface means comprises an upwardly facing radially extending annular surface operable when said spray adjusting member is in one limiting position of adjustment to engage said downwardly facing annular surface whereby said semi-cylindrical recesses define the spray pattern as discrete streams.

11. A sprinkler head as defined in claim 1 wherein said fixedly securing means on the lower portion of said annular body comprises exterior threads.

12. A sprinkler head as defined in claim 11 wherein said body includes a plurality of exterior wrench receiving lands on the central exterior periphery thereof.

13. A sprinkler head as defined in claim 1 wherein said spray adjusting member includes an inner annular portion extending downwardly from said end wall in inwardly spaced relation to said peripheral wall, said tubular member including a central exterior cylindrical surface, said inner annular portion having a lower interior annular sealing surface sealingly engaging said central exterior cylindrical surface.

14. A sprinkler head as defined in claim 13 wherein said spray adjusting member is mounted on said tubular member for axial movement by a section of threads on the interior of said inner annular portion above said annular sealing surface and a cooperating section of threads on the exterior of said tubular member above said central cylindrical surface.