Joints and connections – Laterally related members connected by latch means – e.g.,...
Reexamination Certificate
2001-03-29
2002-11-19
Browne, Lynne H. (Department: 3679)
Joints and connections
Laterally related members connected by latch means, e.g.,...
C403S344000, C024S483000, C024S517000
Reexamination Certificate
active
06481912
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention is related to a construction article, and more particularly to a prop connecting ring which is fitted and bound on a construction prop for transversely connecting the props. The connecting ring can be freely mounted on the prop at any necessary height.
FIG. 1
shows a conventional prop
10
used in construction. The prop
10
has an elongated tubular body
11
fixedly connected with multiple ring bodies
12
at equal intervals. The top and bottom ends of the tubular body
11
are respectively provided with two adjustment seats
13
. The projecting length of the adjustment seats
13
can be adjusted. Each ring body
12
is formed with multiple through holes
14
.
In use, as shown in
FIG. 2
, the props
10
are positioned upright. Several connecting members
15
are connected at the through holes
14
of the ring bodies
12
to transversely connect two adjacent props. Accordingly, a number of props can be systematically connected to form a truss such as a scaffold for supporting moldboards.
In the case that the ground of a construction site is irregular and the drop of the ground exceeds the maximum extending length of the adjustment seats
13
, the ring bodies
12
of the adjacent props
10
will be positioned on different levels as shown in FIG.
2
. The distance between the props is fixed so that the connecting members
15
must be adjustable in length for connecting the props. Such adjustable connecting members are relatively expensive. Moreover, it is necessary to adjust the connecting members one by one. Such operation is quite troublesome. Also, in the case that the connecting members
15
have different lengths and the ring bodies
12
are positioned on different levels, the entire scaffold will bear uneven applied force. This leads to safety problem. In addition, The prop
10
is provided with multiple ring bodies
12
for connecting with the connecting member at different height. However, when transversely connecting the props, not all the ring bodies
12
are used. Therefore, many ring bodies are wasted and the cost is increased.
FIG. 3
shows another type of steel prop
19
for supporting moldboards. The inner tube
191
of such prop
19
can be nested into the outer tube
192
to adjust the length to a greater extent. However, such prop is not equipped with any ring body so that it can be only solely used in an upright state and it is impossible to transversely connect the adjacent props. Therefore, the props cannot be interconnected to form a systematic truss.
Recently, a connecting ring has been developed as shown in FIG.
4
. The connecting ring
20
has a semicircular body
22
and a straight lever body
24
pivotally connected with the semicircular body
22
at one end, whereby the semicircular body
22
can be opened or closed relative to the lever body
24
. A wedge binding bar
26
is passed through a free end of the semicircular body
22
. In use, as shown in
FIG. 5
, the free end of the semicircular body
22
is passed through the other end of the lever body
24
. Then, the connecting ring
20
is fitted around a prop
28
. Then, the binding bar
26
is moved downward to fasten the semicircular body
22
and the lever body
24
on the prop
28
. Accordingly, connecting members
29
can be connected at the through holes
23
of the semicircular body
22
to transversely connect the prop
28
with an adjacent prop.
However, such connecting ring
20
has some shortcomings as follows: First, as shown in
FIG. 5
, sections A and B of the connecting ring are fitted around the prop
28
. The contacting area is limited so that the binding strength is poor and the connecting ring can hardly bear greater applied force. Furthermore, only a half side, that is, the left side in
FIG. 5
of the connecting ring is formed with through holes
23
for connecting with the connecting member
29
. The other side of the prop cannot be transversely connected with another prop. Therefore, in use, only four props
28
can be interconnected to form a rectangular truss, while it is impossible to systematically connect multiple props into a scaffold. Furthermore, the pivot ends of the semicircular body
22
and the lever body
24
tend to loosen so that the two components
22
,
24
are likely to up and down swing due to the gap. As a result, the binding force for the prop is poor.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide a prop connecting ring which can be freely fitted on the prop at any necessary height. Therefore, the ring bodies of two adjacent props can be positioned on the same level to facilitate connection of the props.
It is a further object of the present invention to provide the above prop connecting ring. With the prop connecting ring, it is no more necessary to weld connecting rings on the prop at equal intervals so that the number of the connecting rings can be reduced.
It is still a further object of the present invention to provide the above prop connecting ring which serves to transversely connect steel props.
It is still a further object of the present invention to provide the above prop connecting ring which has better clamping and binding force.
It is still a further object of the present invention to provide the above prop connecting ring which enables the props to be multidirectionally connected to form a systematic scaffold.
It is still a further object of the present invention to provide the above prop connecting ring by which the systematic scaffold has better supporting strength.
The present invention can be best understood through the following description and accompanying drawings wherein:
REFERENCES:
patent: 1050816 (1913-01-01), Deslauriers
patent: 3002241 (1961-10-01), Scurlock
patent: 3376056 (1968-04-01), Linstead
patent: 4189810 (1980-02-01), Beziat
patent: 4412370 (1983-11-01), Speirs
patent: 6406211 (2002-06-01), Hengstenberg et al.
LandOfFree
Prop connecting ring does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Prop connecting ring, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Prop connecting ring will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2917277