Fluid sprinkling – spraying – and diffusing – Distributor continuously moves relative to support during...
Reexamination Certificate
2000-07-17
2002-03-26
Yuen, Henry C. (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Distributor continuously moves relative to support during...
C239S230000, C239S240000, C239S241000
Reexamination Certificate
active
06360966
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a rotary sprinkling head structure of sprinkling gun, in which an anti-detachment ring is fitted into an anti-detachment ring groove formed on the outer circumference of the sprinkling head of the gun body so that it is easier to install the anti-detachment ring. The sprinkling head of the gun body and the inner cap as well as the rotary cap are all made of plastic by integral injection molding. Therefore, the processing time is shortened and mass-production is possible to lower cost. The anti-detachment ring can be truly fitted into the anti-detachment ring groove without detachment and the ratio of good product is high.
FIG. 1
shows a conventional rotary sprinkling head structure of an existent sprinkling gun, including a gun body
10
, a rotary cap
20
and a stop ring
30
. The front end of the sprinkling head of the gun body
10
is disposed with a nail head-like variable water discharging head
11
. A rearward diverging outer stop slope
12
is adjacent to rear side of the variable water discharging head
11
. A water exit
13
is formed behind the outer stop slope
12
. A projecting and inclined engaging guide face
14
is formed behind the water exit
13
. A slide section
15
and an adjusting outer thread
16
are formed on the rear section of the sprinkling head. The rotary cap
20
is made of metal by milling. The outer rear section of the rotary cap
20
is formed with a bulge rotary section
21
. The rear end of the rotary cap
20
is formed with a receptacle
22
. An adjusting inner thread
23
is formed in front of the receptacle
22
. A stop ring groove
24
is formed at middle section of the rotary cap
20
. The front opening of the rotary cap
20
is formed with an outward diverging water discharging slope
25
. A water sealing section
26
with unified smaller diameter is adjacent to rear side of the water discharging slope
25
. A rearward diverging inner stop slope
27
is adjacent to the rear side of the water sealing section
26
.
When assembled, referring to
FIG. 2
, a specific tool is used to place the stop ring
30
into the stop ring groove
24
of the rotary cap
20
. Then the rotary cap
20
is fitted onto the front end of the gun body
10
. When fitted, a certain force is applied to the rotary cap
20
so as to compress the stop ring
30
and make the stop ring
30
forcedly pass through the engaging guide face
14
of the gun body
10
. Then the adjusting inner thread
23
of the rotary cap
20
is screwed onto the adjusting outer thread
16
of the gun body
10
with the stop ring
30
attaching to the slide section
15
of the gun body
10
.
The above conventional structure has some shortcomings as follows:
1. The stop ring
30
must be installed into the stop ring groove
24
of the rotary cap
20
with a specific tool. In addition, when installed, it is impossible to see the interior of the rotary cap
20
so that it is difficult to assemble the sprinkling head.
2. The rotary cap
20
is made of metal by milling. The processing procedure is time-consuming so that it is impossible to mass-produce the sprinkling head and the manufacturing cost is high.
3. The stop ring groove
24
of the rotary cap
20
is formed by milling. The milling measure has poor precision and often leads to large error. Therefore, the stop ring
30
can be hardly truly installed and tends to detach from the stop ring groove
24
. In the case of untrue installation, the sprinkling gun will be a defective one which cannot normally function.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide a rotary sprinkling head structure of sprinkling gun, in which an anti-detachment ring is fitted into an anti-detachment ring groove formed on the outer circumference of the sprinkling head of the gun body so that it is easier to install the anti-detachment ring.
It is a further object of the present invention to provide the above rotary sprinkling head structure of sprinkling gun, in which the sprinkling head of the gun body and the inner cap as well as the rotary cap are all made of plastic by integral injection molding. Therefore, the processing time is shortened and mass-production is possible to lower cost.
It is a further object of the present invention to provide the above rotary sprinkling head structure of sprinkling gun, in which the sprinkling head of the gun body is made of plastic by integral injection molding. Such production measure has good precision and small error. Therefore, the anti-detachment ring can be truly fitted into the anti-detachment ring groove without detachment and the ratio of good product is high.
The present invention can be best understood through the following description and accompanying drawings wherein:
REFERENCES:
patent: 4660766 (1987-04-01), Nelson et al.
patent: 4971256 (1990-11-01), Malcolm
patent: 4986474 (1991-01-01), Schisler et al.
patent: 5058806 (1991-10-01), Ruper
patent: 5288022 (1994-02-01), Sesser
Bacon & Thomas PLLC
Hwu Davis
Yuen Henry C.
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