Rotary sprinkler nozzle
First Claim
1. A nozzle for a rotary sprinkler of the type having a nozzle base that is rotated by a drive, which comprises:
- (a) a nozzle body configured to be carried by the nozzle base for rotation therewith; and
(b) at least a first water flow passage provided in the nozzle body, the first flow passage having a longitudinal axis and comprising;
(i) an inlet;
(ii) an outlet;
(iii) a diffuser connecting the inlet and the outlet, the diffuser having a cross-sectional area that is larger than the cross-sectional area of the inlet; and
(iv) an impact surface which is inclined relative to the longitudinal axis of the first flow passage, the impact surface being positioned to intercept a portion of the water flowing in a boundary layer of the diffuser while the water flowing in a non-boundary layer portion is not intercepted by the impact surface.
1 Assignment
0 Petitions
Accused Products
Abstract
A sprinkler nozzle for a rotary sprinkler comprises two water flow passages extending therethrough, namely an upper passage and a parallel lower passage. The upper passage includes a straight, substantially cylindrical bore having stream straightening vanes, the upper passage watering radially outer portions of the watered pattern. The lower passage comprises a diffuser that reduces the energy of the water flowing into the lower passage by providing an expanded volume, namely a volume having a greater cross-sectional area than the cross-sectional area of the inlet. The water exits the diffuser through an outlet which includes a rear edge that forms an impact surface against which a portion of the boundary layer flow is directed. This impact surface is arch shaped and deflects the intercepted portion of the boundary layer flow from the top to the bottom of the lower passage. The boundary layer flow is then dumped onto a lower ramp of the outlet of the lower passage which lower ramp is downwardly inclined. The remaining water flowing through the lower passage bypasses the impact surface to exit through an upper arch of the outlet. Thus, the water exiting from the lower passage can water radially inner portions of the watered pattern while maintaining a substantially droplet form of water discharge even at medium to high water pressures.
52 Citations
23 Claims
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1. A nozzle for a rotary sprinkler of the type having a nozzle base that is rotated by a drive, which comprises:
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(a) a nozzle body configured to be carried by the nozzle base for rotation therewith; and
(b) at least a first water flow passage provided in the nozzle body, the first flow passage having a longitudinal axis and comprising;
(i) an inlet;
(ii) an outlet;
(iii) a diffuser connecting the inlet and the outlet, the diffuser having a cross-sectional area that is larger than the cross-sectional area of the inlet; and
(iv) an impact surface which is inclined relative to the longitudinal axis of the first flow passage, the impact surface being positioned to intercept a portion of the water flowing in a boundary layer of the diffuser while the water flowing in a non-boundary layer portion is not intercepted by the impact surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A sprinkler nozzle for a rotary sprinkler of the type having a nozzle base that is rotated by a drive, which comprises:
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(a) a nozzle body configured to be carried by the nozzle base for rotation therewith, the nozzle body having upper and lower water flow passages extending through the nozzle body;
(b) wherein the upper passage comprises a substantially cylindrical bore extending through the nozzle body between an inlet and an outlet thereof; and
(c) wherein the lower passage comprises;
(i) an inlet;
(ii) a diffuser adjacent the inlet and having an expanded volume relative to the inlet to reduce the energy of the water passing through the diffuser from the inlet; and
(iii) an outlet adjacent the diffuser, the outlet having a rear edge that protrudes inwardly relative to a surface of the diffuser immediately upstream of the rear edge such that the rear edge forms an impact surface that extends inwardly into a portion of the water flowing in a boundary layer along the surface of the diffuser such that the portion of the boundary layer flow impacts against the rear edge of the outlet.
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19. A sprinkler nozzle for a rotary sprinkler of the type having a nozzle base that is rotated by a drive, which comprises:
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(a) a nozzle body configured to be carried by the nozzle base for rotation therewith, the nozzle body having upper and lower water flow passages extending through the nozzle body;
(b) wherein the upper passage comprises a substantially cylindrical bore extending through the nozzle body between an inlet and an outlet thereof; and
(c) wherein the lower passage comprises;
(i) an inlet;
(ii) a diffuser adjacent the inlet and having an expanded volume relative to the inlet to reduce the energy of the water passing through the diffuser from the inlet; and
(iii) an outlet adjacent the diffuser, the outlet having a rear edge interposed into a portion of the water flowing in a boundary layer in the diffuser such that a portion of the boundary layer flow is intercepted by the rear edge of the outlet, wherein the outlet includes an upper arch with the rear edge of the outlet comprising a rear edge of the upper arch. - View Dependent Claims (20, 21, 22)
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23. A nozzle for a rotary sprinkler of the type having a nozzle base that is rotated by a drive, which comprises:
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(a) a nozzle body configured to be carried by the nozzle base for rotation therewith; and
(b) at least a first water flow passage provided in the nozzle body, the first flow passage having a longitudinal axis and comprising;
(i) an inlet;
(ii) an outlet; and
(iii) wherein the outlet comprises an upper arch overlying a lower ramp, wherein the lower ramp is downwardly inclined relative to the longitudinal axis passing through the first flow passage, and wherein the lower ramp has sides which are undercut into the nozzle body relative to the upper arch such that the lower ramp is wider than the upper arch.
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Specification