Pipe joints or couplings – With assembly means or feature – Guide and support
Reexamination Certificate
1999-09-29
2001-03-13
Arola, Dave W. (Department: 3627)
Pipe joints or couplings
With assembly means or feature
Guide and support
C285S315000, C285S319000, C285S423000
Reexamination Certificate
active
06199913
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a gardening hose, and more particularly to a fast connector of the gardening hose.
BACKGROUND OF THE INVENTION
As shown in
FIGS. 1 and 2
, a fast hose connector of the prior art comprises an inner tube
10
, which is provided in the outer wall thereof with a plurality of receiving holes
11
for receiving a retaining block
12
. The upper half section of the inner tube
10
is fitted into a coil spring
13
whose bottom end is stopped by a stop ring
14
of the inner tube
10
. The fast hose connector further comprises an outer tube
15
which is fitted over the upper half section of the inner tube
10
such that the bottom of a protruded ring
16
of the inner wall of the outer tube
15
is urged by the top end of the coil spring
13
, and that the slanted retainers
17
of the top end of the outer tube
15
are retained by the bottom edge of the retaining ring
18
of the outer wall of the top end of the inner tube
10
. The protruded ring
16
of the outer tube
15
is provided with a plurality of protruded strips
19
in contact with the retaining blocks
12
so as to enable the inner ends of the retaining blocks
12
to enter the inner wall of the inner tube
10
. Now referring to
FIG. 2
, when an insertion tube
1
is inserted into the interior of the inner tube
10
via the outer tube
15
, the inner ends of the retaining blocks
12
are retained in a recessed wall
2
of the insertion tube
1
, so as to locate securely the insertion tube
1
. As the outer tube
15
is pressed to displace to arrive at a locating ring
20
of the lower section of the inner tube
10
, the protruded strips
19
of the protruded ring
16
of the outer tube
15
become separated from the retaining blocks
12
, thereby enabling the insertion tube
1
is pulled upward so as to force the retaining blocks
12
to retract toward the inner wall of the outer tube
15
. As a result, the insertion tube
1
can be pulled out of the inner tube
10
via the outer tube
15
.
Such a prior art hose connector as described above is complicated in construction such that it is formed of many component parts, such as the inner tube
10
, a plurality of retaining blocks
12
, the coil spring
13
, and the outer tube
15
. In addition, the retaining blocks
12
must be aligned with the receiving holes
11
of the inner tube
10
at the time when the prior art hose connector is assembled. The work of alignment of the retaining blocks
12
with the receiving holes
11
is time-consuming.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a fast hose connector which is relatively simple in construction and costeffective.
In keeping with the principle of the present invention, the foregoing objective of the present invention is attained by a fast hose connector comprising a guide tube and an arresting tube. The guide tube is provided in the outer wall thereof with an upper guide ring, a lower guide ring, a stop ring, two longitudinal guide slots extending from the upper guide ring to the stop ring, and two through holes located under the upper guide ring such that the two through holes are in communication with the interior of the guide tube. Each through hole is provided in the top edge thereof and the bottom edge thereof with a slanted surface which is located in the outer wall of the guide tube and is provided with a pointed edge. The upper guide ring and the lower guide ring are provided with two protrusions opposite in location to each other. The arresting tube is provided in the inner wall thereof with two elastic retaining bodies opposite in location to each other and extending upward from the bottom of the inner wall of the arresting tube. The two elastic retaining bodies are provided at the top end thereof with an enlarged body having a recess located in the top thereof, and a slanted stop surface located in the bottom thereof. The arresting tube is further provided in the inner wall thereof with two longitudinal locating slots opposite in location to each other for locating the protrusions of the guide tube at the time when the arresting tube is fitted over the guide tube. In the meantime, the two elastic retaining bodies of the arresting tube are guided along the guide slots of the guide tube such that the enlarged body of the elastic retaining bodies is received in the through hole of the guide tube, and that the recess of the enlarged body retains the pointed edge of the slanted surface of the through hole of the guide tube, and further that the enlarged body is extended into the inner wall of the guide tube.
REFERENCES:
patent: 4219222 (1980-08-01), Brusadin
patent: 4660803 (1987-04-01), Johnston et al.
patent: 4681350 (1987-07-01), Gaita
patent: 4903942 (1990-02-01), Licciardello
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