Crimping tool

Abstract

The present invention provides a tool being used to crimp a ring onto a pipe joint, which includes two half-die members having each bore openings and a recess formed at their rear end portion for receiving a body member to be connected therewith by dowell pins, and further at their front end portion is formed a recess for receiving a threaded rod coupled to a clamp bolt. The threaded rod is engaged therein a threaded bore formed thereon a bushing passing through two bores located thereof each side of the lower half-die member. The clamp bolt is blocked therein the bushing by a spring pin to be engaged therethrough a hole formed therewith and through a hole formed therein the threaded rod. Further, the both half-die members are disposed in alignment with the bore openings for receiving the ring that is crimped onto the pipe joint by the use of a handle having at each end portion a notch to prevent the handle to be pulled out of the clamp bolt.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

More particularly, the present invention relates generally to a tool which can be hand held and used to crimp a ring onto a pipe joint.

2. Description of the Related Art

A search of prior art records has unveiled the following patents:

1. U.S. Pat. No. 2,891,598 issued in 1959 to Stanley;

2. U.S. Pat. No. 2,526,210 issued in 1949 to Edelmann;

3. US D 400,893 issued in 1998 to Peterson;

4. U.S. Pat. No. 3,191,420 issued in 1963 to Wilson;

5. U.S. Pat. No. 4,192,171 issued in 1980 to Hamilton;

6. U.S. Pat. No. 4,266,420 issued in 1981 to Walker;

7. U.S. Pat. No. 4,982,594 issued in 1991 to Wiebe;

8. U.S. Pat. No. 5,063,770 issued in 1991 to Chen;

9. U.S. Pat. No. 5,094,097. issued in 1992 to Tooth;

10. U.S. Pat. No. 5,280,716 issued in 1994 to Ryan;

11. U.S. Pat. No. 5,267,464 issued in 1993 to Cleland; and

12. US D 341,303 issued in 1993 to Davis.

It is therefore an object of the present invention to provide a tool which can be hand held and used to crimp a ring onto a pipe joint.

SUMMARY OF THE INVENTION

According to the present invention, there is described a tool being used to crimp a ring onto a pipe joint, which includes two half-die members having each bore openings and a recess formed at their rear end portion for receiving a body member to be connected therewith by dowel pins, and further at their front end portion is formed a recess for receiving a threaded rod coupled to a clamp bolt. The threaded rod is engaged therein a threaded bore formed thereon a bushing which passes through two bores located thereof each side of the lower half-die member.

The clamp bolt is blocked therein the bushing by a spring pin to be engaged therethrough a hole formed therewith and through a hole formed therein the threaded rod.

Further, the both half-die members are disposed in alignment with the bore openings for receiving the ring that is crimped onto the pipe joint by the use of a handle having at each end portion a notch to prevent the handle to be pulled out of the clamp bolt.

And further, the clamp bolt includes at its upper end portion an exagonal-head to be used with a key or ratchet if needed.

And finally, a washer is mounted to the clamp bolt for protecting the top face of the upper half-die member.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)

The invention will now be described by way of example with reference to the accompanying drawings, in which:

FIG. 1 is a plan view illustrating the improved crimping tool;

FIG. 2 is a side view illustrating the crimping tool in the open position; and

FIG. 3 is an exploded view showing the components in position for assembly.

DETAILED DESCRIPTION OF THE INVENTION

Now referring to the accompanying drawings, and in particular to FIGS. 1 to 3, there is shown a tool being used to crimp a ring onto a pipe joint, which includes two half-die members (1)(2) having each bore openings (8) and a recess (7) formed at their rear end portion for receiving a body member (3) to be connected therewith by dowell pins (4) therein holes (6), and further at their front end portion is formed a recess (12)(13) for receiving a threaded rod (17) coupled to a clamp bolt (19). The threaded bolt (17) is engaged therein a threaded bore (10) formed thereon a bushing (9) passing through two bores (11) formed thereof each side of the lower half-die member (2). The clamp bolt (19) is blocked therein the bushing (9) by a spring pin (15) to be engaged therethrough a hole (14) formed therewith and through a hole (16) formed therein the threaded rod (17).

Further, the both half-die members (1)(2) are disposed in alignment with the bore openings (8) for receiving the ring that is crimped onto the pipe joint by the use of a handle (22) having at each end portion a notch (23) to prevent the handle passing through holes (21) of the clamp bolt (19) to be pulled out.

And further, the clamp bolt (19) includes at its upper end portion an hexagonal-head (20) to be used with a key or ratchet if needed.

And finally, a washer (18) is mounted to the clamp bolt (19) for protecting the top face of the upper half-die member (1).

Accordingly, while the preferred embodiments of the invention have been described above, it will be recognized and understood that various modifications may be made in the invention and the appended claims are intended to cover all such modifications which may fall within the spirit and scope of the invention.

Claims

1. A tool being used to crimp a ring onto a pipe joint, wherein said tool comprising:

two half-die members having each bore openings;

a recess formed at their rear end portion for receiving a body member to be connected therewith by dowell pins;

a recess formed at their front end portion for receiving a threaded rod coupled to a clamp bolt,

wherein said threaded rod is engaged therein a threaded bore formed thereon a bushing passing through two bores formed thereof each side of the lower half-die member, and

wherein said clamp bolt is blocked therein the bushing by a spring pin to be engaged therethrough a hole formed therewith and through a hole formed therein the threaded rod.

2. A tool as defined in claim 1 wherein the half-die members are disposed in alignment with the bore openings for receiving the ring that is crimped onto the pipe joint by the use of a handle having at each end portion a notch to prevent the handle to be pulled out of the clamp bolt.

3. A tool as defined in claim 1 characterized in that said tool has three bore openings.

4. A tool as defined in claim 1 wherein a first bore opening is characterized in that its diameter is of 288 mm.

5. A tool as defined in claim 1 wherein a second bore opening is characterized in that its diameter is of 344 mm.

6. A tool as defined in claim 1 wherein a third bore opening is characterized in that its diameter is of 463 mm.

7. A tool as defined in claim 1 wherein the clamp bolt includes at its upper end portion an hexagonal-head to be used with a key or ratchet.

8. A tool as defined in claim 1 characterized in that a washer is mounted to said clamp bolt for protecting the top face of the upper half-die member.