GB2540289A

GB2540289A - Pipe cutter

Info

Publication number: GB2540289A
Application number: GB1615947.7A
Authority: GB
Inventors: Wu Shih-Piao
Original assignee: Jiin Haur Industrial Co Ltd
Current assignee: Jiin Haur Industrial Co Ltd
Priority date: 2016-09-20
Filing date: 2016-09-20
Publication date: 2017-01-11
Anticipated expiration: 2036-09-20
Also published as: GB201615947D0; GB2540289B

Abstract

A pipe cutter includes a handle unit 10 and a cutting unit 20. The handle unit includes a first handle 12 having a first arm 14 which is provided with a first hole 141, and a second handle 13 having a second arm 15 which is provided with a second hole 151 and a plurality of adjusting holes 152. The first hole 141 is located between the second hole 151 and the adjusting holes 152 to form a triangular position. The cutting unit 20 includes two positioning blade wheels 21 respectively connected with the first hole and the second hole, a blade support 22 locked onto the adjusting holes 152, and a movable blade wheel 23 connected with the blade support 22. Thus, the two positioning blade wheels 21 and the movable blade wheel 23 form a triangular position to clamp and provide a rotation cutting effect to an object.

Description

PIPE CUTTER

The present invention relates to a cutter and, more particularly, to a pipe (or tube) cutter. A conventional pipe (or tube) cutter is used to clamp and cut a pipe in a rotation shearing manner. In general, the conventional pipe cutter includes a frame, two rollers mounted on the frame and resting on the pipe, and a threaded rod which drives and feeds a cutting wheel to press the pipe so that the pipe is clamped between the two rollers and the cutting wheel. Then, the frame is rotated relative to the pipe through a circle. Then, the threaded rod is rotated to drive the cutting wheel to further press the pipe. The frame is rotated relative to the pipe successively until the pipe is cut by the cutting wheel. However, the operator has to pull back the threaded rod for clamping the pipe again at each time, thereby greatly causing inconvenience to the operator in operation of the conventional pipe cutter, and thereby wasting the manual labor and the working time. In addition, it is inconvenient for the conventional pipe cutter to cut a soft object, such as a thin plastic pipe, a rubber pipe, a paper pipe or a three branch.

The primary objective of the present invention is to provide a pipe cutter having a hand-held cutting function when in use to achieve a hand-held cutting purpose.

In accordance with the present invention, there is provided a pipe cutter comprising a handle unit and a cutting unit connected with the handle unit. The handle unit includes a first handle and a second handle pivotally connected with the first handle by a shaft. The first handle of the handle unit is provided with a first arm which is provided with a first hole. The second handle of the handle unit is provided with a second arm which is provided with a second hole. A distance between the second hole and the shaft is greater than that between the first hole and the shaft. The second arm of the handle unit is provided with a plurality of adjusting holes located between the second hole and the shaft. The cutting unit includes two positioning blade wheels respectively connected with the first hole and the second hole of the handle unit, a blade support locked onto the adjusting holes of the handle unit by a rotation knob and provided with a locking hole, and a movable blade wheel connected with the locking hole of the blade support. The two positioning blade wheels and the movable blade wheel of the cutting unit are arranged at a triangular state. The blade support of the cutting unit is mounted on different adjusting holes of the second arm, so that the movable blade wheel of the cutting unit is disposed at a position that is adjusted to correspond to different dimensions of objects to be cut.

According to a further feature of the present invention, the first arm of the handle unit is provided with the first hole, the second arm of the handle unit is provided with the second hole and the adjusting holes, the first hole is located between the second hole and the adjusting holes to form a triangular position, the two positioning blade wheels of the cutting unit are respectively connected with the first hole and the second hole of the handle unit, and the movable blade wheel is mounted on the blade support which is connected with the adjusting holes of the handle unit, so that the two positioning blade wheels and the movable blade wheel of the cutting unit form a triangular position to clamp an object and to provide a rotation cutting effect, so as to form a practical cutting tool that is held by hands when in use.

According to another feature of the present invention, the second arm of the handle unit is provided with the adjusting holes, and the rotation knob of the cutting unit selectively corresponds to the adjusting holes of the handle unit, to change the location of the blade support, and to shift the position of the movable blade wheel, so as to adjust the relative position between the two positioning blade wheels and the movable blade wheel of the cutting unit, so as to cut pipes of different dimensions.

The benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.

In the drawings: FIG. 1 is a perspective view of a pipe cutter in accordance with the preferred embodiment of the present invention. FIG. 2 is an exploded perspective view of the pipe cutter as shown in FIG. 1. FIG. 3 is a side view of the pipe cutter as shown in FIG. 1. FIG. 4 is a locally enlarged view of the pipe cutter as shown in FIG. 3. FIG. 5 is a schematic operational view showing a first operation state of the pipe cutter. FIG. 6 is another schematic operational view showing the first operation state of the pipe cutter. FIG. 7 is a schematic operational view showing a second operation state of the pipe cutter. FIG. 8 is a schematic operational view showing a third operation state of the pipe cutter. FIG. 9 is another schematic operational view showing the third operation state of the pipe cutter.

Referring to the drawings and initially to FIGS. 1-4, a pipe cutter in accordance with the preferred embodiment of the present invention comprises a handle unit 10 and a cutting unit 20 connected with the handle unit 10.

The handle unit 10 includes a first handle 12, a second handle 13 pivotally connected with the first handle 12 by a shaft 11, and an elastic member 16 biased between the first handle 12 and the second handle 13. The first handle 12 of the handle unit 10 is provided with a first arm 14 which is provided with a first hole 141. The second handle 13 of the handle unit 10 is provided with a second arm 15 which is provided with a second hole 151. A distance between the second hole 151 and the shaft 11 is greater than that between the first hole 141 and the shaft 11. The second arm 15 of the handle unit 10 is provided with a plurality of adjusting holes 152 located between the second hole 151 and the shaft 11. The first hole 141 is located between the second hole 151 and the adjusting holes 152 so that the first hole 141, the second hole 151 and the adjusting holes 152 form a triangular position.

The cutting unit 20 includes two positioning blade wheels 21 respectively connected with the first hole 141 and the second hole 151 of the handle unit 10, a blade support 22 locked onto the adjusting holes 152 of the handle unit 10 by a rotation knob 24 and provided with a locking hole 221, and a movable blade wheel 23 connected with the locking hole 221 of the blade support 22. The two positioning blade wheels 21 and the movable blade wheel 23 of the cutting unit 20 are arranged at a triangular state. The blade support 22 of the cutting unit 20 is mounted on different adjusting holes 152 of the second arm 15, so that the movable blade wheel 23 of the cutting unit 20 is disposed at a position that is adjusted to correspond to different dimensions of objects to be cut.

In the preferred embodiment of the present invention, the second arm 15 of the handle unit 10 is provided with an abutting face 153 located beside the adjusting holes 152. The blade support 22 of the cutting unit 20 is provided with a protruding stop block 222 abutting the abutting face 153 of the second arm 15. The rotation knob 24 of the cutting unit 20 is located between the movable blade wheel 23 and the stop block 222.

In the preferred embodiment of the present invention, the blade support 22 of the cutting unit 20 is provided with a plurality of through holes 223 which are connected to each other. The rotation knob 24 of the cutting unit 20 is selectively mounted on the through holes 223 of the blade support 22 and is selectively locked onto the adjusting holes 152 of the handle unit 10. The through holes 223 of the blade support 22 correspond to the adjusting holes 152 of the second arm 15 to increase a shift range of the blade support 22.

In the preferred embodiment of the present invention, each of the first hole 141, the second hole 151 and the locking hole 221 is formed with an internal thread, and a plurality of bolts 25 co-operating with a plurality of nuts 26 correspond to the first hole 141, the second hole 151 and the locking hole 221 to connect the two positioning blade wheels 21 and the movable blade wheel 23 of the cutting unit 20.

In the preferred embodiment of the present invention, the first arm 14 of the handle unit 10 is provided with a projection 142 located beside the shaft 11. A push block 131 is pivotally mounted on the second handle 13 of the handle unit 10 and is located beside the shaft 11. The push block 131 is pivoted to push the projection 142 of the first arm 14 so as to fix the handle unit 10 when the first handle 12 and the second handle 13 are disposed at a clamping state.

In operation, referring to FIGS. 5 and 6 with reference to FIGS. 1-4, the first arm 14 and the second arm 15 of the handle unit 10 are opened, so that the two positioning blade wheels 21 of the cutting unit 20 straddle an object, such as a pipe "Al", to be worked. Then, a force is applied on the handle unit 10 to close the first handle 12 and the second handle 13 of the handle unit 10, so that the first arm 14 and the second arm 15 of the handle unit 10 are moved toward each other, with the shaft 11 functioning as a fulcrum. At this time, the two positioning blade wheels 21 and the movable blade wheel 23 of the cutting unit 20 are arranged at a triangular position to clamp the pipe "Al", while the two positioning blade wheels 21 and the movable blade wheel 23 of the cutting unit 20 are disposed at a rolling state, so that the handle unit 10 is rotated relative to the pipe "Al" as shown in FIG. 5 to increase the cutting depth gradually, so as to cut the pipe "Al" as shown in FIG. 6.

As shown in FIG. 7, after the rotation knob 24 of the cutting unit 20 is released, the rotation knob 24 of the cutting unit 20 selectively corresponds to one of the adjusting holes 152 of the handle unit 10, that is closer to the shaft 11, to change the position of the movable blade wheel 23, and to increase the interval between the two positioning blade wheels 21 and the movable blade wheel 23 of the cutting unit 20, so as to cut a pipe "A2" with a larger dimension. Besides, the rotation knob 24 of the cutting unit 20 selectively corresponds to one of the through holes 223 of the blade support 22 to change the position of the movable blade wheel 23. Thus, the adjusting holes 152 of the handle unit 10 and the through holes 223 of the blade support 22 increase the shift range of the blade support 22 and the movable blade wheel 23.

Referring to FIGS. 8 and 9, the cutting unit 20 of the pipe cutter is used to cut a branch "A3" of a tree. In addition, the cutting unit 20 of the pipe cutter can be used to cut the bark of the branch "A3".

Accordingly, the first arm 14 of the handle unit 10 is provided with the first hole 141, the second arm 15 of the handle unit 10 is provided with the second hole 151 and the adjusting holes 152, the first hole 141 is located between the second hole 151 and the adjusting holes 152 to form a triangular position, the two positioning blade wheels 21 of the cutting unit 20 are respectively connected with the first hole 141 and the second hole 151 of the handle unit 10, and the movable blade wheel 23 is mounted on the blade support 22 which is connected with the adjusting holes 152 of the handle unit 10, so that the two positioning blade wheels 21 and the movable blade wheel 23 of the cutting unit 20 form a triangular position to clamp an object and to provide a rotation cutting effect, so as to form a practical cutting tool that is carried easily and held by hands when in use. In addition, the second arm 15 of the handle unit 10 is provided with the adjusting holes 152, and the rotation knob 24 of the cutting unit 20 selectively corresponds to the adjusting holes 152 of the handle unit 10, to change the location of the blade support 22, and to shift the position of the movable blade wheel 23, so as to adjust the relative position between the two positioning blade wheels 21 and the movable blade wheel 23 of the cutting unit 20, so as to cut pipes of different dimensions.

Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.

Claims

1. A pipe cutter comprising: a handle unit: and a cutting unit connected with the handle unit; wherein: the handle unit includes: a first handle; and a second handle pivotally connected with the first handle by a shaft; the first handle of the handle unit is provided with a first arm which is provided with a first hole; the second handle of the handle unit is provided with a second arm which is provided with a second hole; a distance between the second hole and the shaft is greater than that between the first hole and the shaft; the second arm of the handle unit is provided with a plurality of adjusting holes located between the second hole and the shaft; the cutting unit includes: two positioning blade wheels respectively connected with the first hole and the second hole of the handle unit; a blade support locked onto the adjusting holes of the handle unit by a rotation knob and provided with a locking hole; and a movable blade wheel connected with the locking hole of the blade support; the two positioning blade wheels and the movable blade wheel of the cutting unit are arranged at a triangular state; and the blade support of the cutting unit is mounted on different adjusting holes of the second arm, so that the movable blade wheel of the cutting unit is disposed at a position that is adjusted to correspond to different dimensions of objects to be cut.

2. The pipe cutter of claim 1, wherein the second arm of the handle unit is provided with an abutting face located beside the adjusting holes, the blade support of the cutting unit is provided with a protruding stop block abutting the abutting face of the second arm, and the rotation knob of the cutting unit is located between the movable blade wheel and the stop block.

3. The pipe cutter of claim 1, wherein the blade support of the cutting unit is provided with a plurality of through holes which are connected to each other, the rotation knob of the cutting unit is selectively mounted on the through holes of the blade support, and the through holes of the blade support correspond to the adjusting holes of the second arm to increase a shift range of the blade support.

4. The pipe cutter of claim 1, wherein each of the first hole, the second hole and the locking hole is formed with an internal thread, and a plurality of bolts co-operating with a plurality of nuts correspond to the first hole, the second hole and the locking hole to connect the two positioning blade wheels and the movable blade wheel of the cutting unit.

5. The pipe cutter of claim 1, wherein the handle unit further includes an elastic member biased between the first handle and the second handle.

6. The pipe cutter of claim 1, wherein the first arm of the handle unit is provided with a projection located beside the shaft, a push block is pivotally mounted on the second handle of the handle unit and is located beside the shaft, the push block is pivoted to push the projection of the first arm so as to fix the handle unit when the first handle and the second handle are disposed at a clamping state.