Pipe joints or couplings – Sleeve – Dependent
Reexamination Certificate
2000-08-01
2002-09-10
Browne, Lynne H. (Department: 3679)
Pipe joints or couplings
Sleeve
Dependent
C285S410000, C285S417000
Reexamination Certificate
active
06447029
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a connection apparatus for a waterway pipe, and in particular to a connection apparatus which is capable of fabricating a long pipe by connecting a plurality of pipes each having a certain length.
2. Description of the Background Art
Generally, a waterway is used for continuously providing water from a river, a water reservoir, etc. to a rice field.
The waterway is formed by digging a certain area using a channel shape concrete.
Therefore, it takes a long time for forming the waterway, and the cost for forming the waterway is increased. In addition, the waterway is formed on the ground, and the nature and the environment are damaged.
In order to overcome the above-described problems, as shown in
FIGS. 1 and 2
, a plurality of metal pipes are used for forming a waterway. Recently, a pipe
100
of
FIG. 1
is generally used.
Namely, the pipes
100
each having a certain length are connected using a coupler
200
. The coupler
200
surrounds each end of the pipes
100
, and then the both ends of the coupler
200
are connected using a bolt
300
and a nut
400
.
When connecting both ends of the coupler
200
, in a state that one of the bolt
300
and the nut
400
is fixed, the other one of the bolt
300
and the nut
400
is rotated. Therefore, it is difficult to maintain a fixed state of the same, and in addition, another person is required for maintaining the fixed state.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a connection apparatus for a waterway pipe which overcomes the problems encountered during a conventional coupler connection work.
It is another object of the present invention to provide a connection apparatus for a waterway pipe which is capable of automatically fixing one of a bolt and a nut which are used for connecting the both ends of a coupler, so that it is possible to easily rotate the other one of the bolt and the nut. Therefore, a person is not additionally used for fixing one of the bolt and the nut.
In order to achieve the above objects, there is provided a connection apparatus for a waterway pipe which includes a plurality of pipes each having both ends which are connected in series, a coupler having protruded ends and a connection member having a plurality of connection holes, the connection member surrounding the connection ends of the pipes, an engaging member which passes through the connection holes, the engaging member having one end inserted into a connection hole and the other end contacting one side of the connection member, so that the coupling member moves backwardly and forward by a rotation force of the engaging member and the coupler is tightened an loosened.
The connection hole formed at the connection member is polygonal.
The engaging member includes a support member contacting with one side of the connection member, an engaging hole formed at a center portion of the support member and threadably engaged with the support member, and a rotation prevention member integrally formed with one side of the support member and having an outer surface corresponding to an inner surface of the polygonal hole.
The rotation prevention member includes a vertical cut-away groove formed at both sides of the center portion of the same, and a fixing member inserted into the cut-away groove.
Additional advantages, objects and features of the invention will become more apparent from the description which follows.
REFERENCES:
patent: 4734001 (1988-03-01), Bennett
patent: 4790574 (1988-12-01), Wagner et al.
patent: 4906150 (1990-03-01), Bennett
patent: 5010626 (1991-04-01), Dominguez
patent: 5961161 (1999-10-01), Sponer
Browne Lynne H.
Dunwoody Aaron M
Ladas & Parry
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