Dispenser head for garden watering sprinkler

Fluid sprinkling – spraying – and diffusing – Plural interchangeable discharge modifiers – outlet... – Selectively arrangeable outlet means

Reexamination Certificate

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Details

C239S446000

Reexamination Certificate

active

06196476

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to an improved dispenser head structure for a garden watering sprinkler. The dispenser head is integrally combined with a base plate by ultrasonic welding method. The dispenser head is secured to the head portion of a sprinkler gun by a screw. The dispenser head is provided with a plurality of radially distributed full discharge openings on the periphery thereof. The dispenser head has a round board on which are equipped with 4 discharge outlets at the central area thereof. A ring area disposed adjacent to those peripherally located full discharge openings is provided with a plurality of bores. A round area is disposed at the center area circled by the 4 discharge outlets. There are a small C-shaped partition wall area and a large C-shaped partition wall area on the rear side of the round board, that are continually connected to the tubular extension of the 4 discharge outlets by vertical walls so that a closed area is defined at the center thereof. There are 6 inlet holes and 4 full discharge outlets on the base plate. The 6 inlet holes are registered with the 4 tubular extensions and the small and large C-shaped partition wall areas. Water can be filled up the closed area via the large C-shaped partition wall area and discharged via the multiple full discharge openings when the dispenser head is rotated to make the large C-shaped partition wall area selectively registered with a water discharge hole. Such a dispenser head permit a reverse flow of water externally jetted against the dispenser head to clean dirt accumulated in the dispenser head. The removed dirt can be brought out of dispenser head via the full discharge openings.
Referring to
FIG. 1
, the exploded components of the prior art comprises a sprinkler gun
10
, a seal ring
14
, a positioning pin
16
, a screw
17
, a dispenser head
20
and a base plate
30
. The sprinkler gun
10
has a head portion
11
provided with an internally threaded post
12
. Right above the internally threaded post
12
is disposed a water discharge hole
13
in which are disposed a number of axially defined ribs
131
. A positioning hole
15
is placed at a distance under the water discharge hole
13
. The dispenser head
20
is has a plurality of inwardly and radially tapered ribs
21
connected to a round board
22
full of discharge bores. Between every two ribs
21
is defined a full discharge opening
25
. There are 6 variation discharge outlets
23
and 2 closed circular areas
24
, as shown in FIG.
2
. Each discharge outlet
23
has a backwardly defined tubular extension
26
. There are 6 inlet holes
31
, a finely netted water inlet hole
32
, a key hole shaped cavity
33
disposed on the base plate
30
on the rear side of which are disposed 8 retaining recesses
34
.
In assembly, as shown in
FIG. 3
, the base plate
30
and the dispenser head
20
are integrally fixed together by an ultrasonic welding method with the 6 inlet holes
31
of the base plate
30
registered with the 6 tubular extensions
26
. The peripheral flange wall
35
is placed at a distance with the inner wall of the dispenser head
20
. The positioning pin
16
is housed in the positioning hole
15
and a seal ring
14
is placed in the water discharge hole
13
of the head portion
11
of the sprinkler gun
10
. The dispenser head
20
is secured to the head portion
11
of the sprinkler head
10
by a screw
17
which is engaged with the central hole of the dispenser head
20
and the base plate
30
and the internally threaded post
12
. The inlet holes
31
of the base plate
30
are rotated into selective registration with the water discharge hole
13
and retained in place by the positioning pin
16
which is selectively registered with one of the retaining recesses
34
.
When one of the inlet holes
31
of the base plate
30
is selectively registered with the water discharge hole
13
, water can be discharged out of one of the variation discharge outlets
23
. Alternatively, the finely netted water inlet hole
32
registered with the closed circular area
24
is engaged with the water discharge hole
13
, water can be discharged via the bored ring area of the round board
22
of the dispenser head
20
. As further shown in
FIG. 4
, when the water discharge hole
13
is placed in alignment with the key hole shaped cavity
33
of the base plate
30
, water can be led into the space between the peripheral wall
35
and the inner wall of the dispenser head
20
. Thereby water can be discharged out of the full discharge openings
25
among the ribs
21
of the dispenser head
20
.
To clean accumulated dirt out of the garden watering sprinkler of the prior art, external water flow is jetted against the dispenser head
20
so that water can be led into the full discharge openings
25
, all other variation discharge outlets
23
and all dirt is flushed into the inlet holes
31
of the base plate
30
and also the netted inlet hole
32
. Finally, the removed dirt is brought into the sprinkler gun
10
and expelled out via the full discharge openings
25
.
The prior dispenser head
20
has the following disadvantages in use:
1. When water is discharged out of the full discharge openings
25
, the key hole shaped cavity
33
of the base plate
30
is registered with the water discharge hole
13
of the head portion
11
of the sprinkler gun
10
. In that case, water is limited and easily concentrated in the full discharge openings at lower portion of the dispenser head
20
.
2. The externally jetted water flow is easily limited by the key hole shaped cavity
33
when dirt of the dispenser head
20
is to be cleaned, so it is relatively hard to get the dispenser head precisely and completely cleaned.
SUMMARY OF THE INVENTION
Therefore, the primary object of the present invention is to provide an improved dispenser head for a garden watering sprinkler which is equipped with a large and a small C-shaped partition wall area that define a closed area in combination with a continuous wall. The closed area is registered with a number of full discharge outlets of a base plate which is fixedly secured to the dispenser head so that water can be evenly distributed and discharged via a plurality of full discharge openings evenly disposed around the periphery of the dispenser head. Such a structure permits water to be discharged in a smoother and more distributive manner without concentration at a particular area.
Another object of the present invention is to provide a dispenser head for a garden watering sprinkler which can be cleaned directly by a reverse flow of water jetted against the central area of a round board of the dispenser head. Dirt accumulated in the dispenser is flushed into a closed area of the dispenser and then into a plurality of full discharge outlets of the base plate. Thereby dirt is finally driven out the dispenser head via a plurality of full discharge openings disposed around the periphery of the dispenser head in a more direct and complete manner.


REFERENCES:
patent: 5566886 (1996-10-01), Wang
patent: 5598978 (1997-02-01), Wang
patent: 5645222 (1997-07-01), Chih
patent: 5772121 (1998-06-01), Wang
patent: 5873531 (1999-02-01), Wang
patent: 5992762 (1999-11-01), Wang

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