Adjustable sprinkler nozzle

Details Adjustable sprinkler nozzle Adjustable sprinkler nozzle

2000-12-12

2002-09-03

Morris, Lesley D. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Terminal outlet formed between parts mounted for relative...

Axially movable outlet part

C239S460000, C239S513000, C239S514000, C239SDIG001

Reexamination Certificate

active

06443372

ABSTRACT:

BACKGROUND OF THE INVENTION
1. (a) Field of the Invention
The present invention relates to an improved sprinkler nozzle, more particularly to an adjustable sprinkler nozzle that is adjustable up to 360 degrees.
2. (b) Description of the Prior Art
U.S. Pat. No. 4,579,285 discloses an adjustable sprinkler system (S), which, as shown in
FIGS. 16
to
18
, comprises an outer tube
6
, an inner tube
7
, a cap
8
and a screw bolt
9
. The upper edge of the inner tube
7
is provided with a spiraling edge
71
, and the bottom edge of the cap
8
is correspondingly provided with a spiraling edge
81
, thereby forming an adjustable nozzle with a variable outlet orifice. By rotating the cap
8
to displace upwardly and downwardly within the inner tube
7
, the flow and speed of the water can be controlled. However, such a sprinkler system (S) has the following drawbacks:
1. Since the water that flows via the bottom portion of the outer tube
6
into a passage
72
is ejected from the outlet orifice between the spiraling edges
81
,
71
between the cap
8
and the inner tube
7
, the water will flow along the inclined face of the spiraling edges and is sprinkled to the surrounding by a radial force (P
1
). However, since the spiraling flow of water is not barred in the lateral directions, a larger water jet (W) will be formed at a longitudinal drop face
82
between the higher face and the lower face of the spiraling edge
81
, as shown in
FIG. 18
, thereby resulting in uneven sprinkling of water.
2. Furthermore, to turn off the sprinkler system (S), the cap has to be rotated downwardly so that the spiraling edge
81
abuts against the spiraling edge
71
of the inner tube
7
. However, since there is a drop face between the spiraling edges
81
,
71
, a gap may be present between the abutting spiraling edges
81
,
71
during closing, thereby resulting in water leakage.
In U.S. Pat. No. 5,556,036 entitled “Adjustable Arc Sprinkler Nozzle,” in order to improve the above-mentioned drawbacks, with reference to
FIGS. 19 and 20
, a stop member
83
is disposed at the outer periphery of a longitudinal drop face
82
at the joint of a spiraling edge
81
of a cap
8
to provide a lateral force to thereby prevent the formation of a larger water jet (W) at the drop face
82
associated with the prior art shown in FIG.
18
. Hence, when the water is sprayed in radial directions (P
1
), some of the radially flowing water will be blocked by the stop member
83
, thereby forming a dead angle of &thgr; degrees. As such, 360-degree sprinkling cannot be achieved.
SUMMARY OF THE INVENTION
The primary object of the invention is to provide an adjustable sprinkler nozzle that is adjustable up to 360 degrees and that does not have any dead angle.
Another object of the invention is to provide an adjustable sprinkler nozzle that utilizes a stepped flange provided at a lower end of a first spiraling face of a cap to abut against an inner wall of a third spiraling face of an upper body to control speed and flow of water, and to ensure complete closing of the nozzle during closing so as to prevent water leakage.


REFERENCES:
patent: 6145758 (2000-11-01), Ogi et al.
patent: 6264117 (2001-07-01), Roman

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