U.S. patent number RE40,461 [Application Number 09/771,243] was granted by the patent office on 2008-08-26 for pipe cutter.
Invention is credited to Bobby Hu.
United States Patent |
RE40,461 |
Hu |
August 26, 2008 |
Pipe cutter
Abstract
A pipe cutter includes a body having two side walls and each of
the side walls has an arcuate slot. A rod pivotally extends through
the first end of the body and a first contacting member is
rotatably connected to the second end of the body. A first link has
a first end thereof pivotably connected to the body and a second
end thereof having a disk blade rotatably connected thereto. The
rod is pivotally connected to the first link to which a second link
is pivotally connected, the other end of the second link has a
second contacting member rotatably connected thereto. The second
contacting member has two protrusions extending centrally and
longitudinally therefrom so as to move within the two arcuate
slots.
Inventors: |
Hu; Bobby (Taichung,
TW) |
Family
ID: |
22606125 |
Appl.
No.: |
09/771,243 |
Filed: |
January 18, 2001 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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Reissue of: |
09167145 |
Oct 6, 1998 |
06055732 |
May 2, 2000 |
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Current U.S.
Class: |
30/102;
30/94 |
Current CPC
Class: |
B23D
21/08 (20130101) |
Current International
Class: |
B23D
21/08 (20060101) |
Field of
Search: |
;30/92,93,94,95,101,102 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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405860 |
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Jan 1910 |
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FR |
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2423296 |
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Nov 1979 |
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FR |
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Primary Examiner: Payer; Hwei-Siu C.
Attorney, Agent or Firm: Kamrath; Alan Kamrath &
Associates PA
Claims
What is claimed is:
1. A pipe cutter comprising: a body having two side walls and each
of said two side walls having an arcuate notch defined in one of
two sides thereof, said body having a first end with a rod
pivotally and movably extending therethrough and a second end
having a first contacting member rotatably connected thereto; a
first link having a first end therefore pivotably connected to said
body and a second end thereof having a disk blade rotatably
connected thereto, said rod pivotally connected to said first link,
and a second link having a first end thereof pivotally connected to
said first link and a second end thereof having a second contacting
member rotatably connected thereto, a spring biased between said
second link and said body, said second contacting member having two
protrusions extending centrally and longitudinally therefrom so as
to move along said two arcuate notches.
2. The pipe cutter as claimed in claim 1 further comprising a knob
connected to one of two ends .[.thereof.]. .Iadd.of the
rod.Iaddend..
3. The pipe cutter as claimed in claim 1, wherein said rod is a
threaded rod.
4. The pipe cutter as claimed in claim 1 further comprising a tube
rotatably received in said first end of said body and said rod
movably extending through said tube.
5. The pipe cutter as claimed in claim 1, wherein said body
comprises an arcuate plate and said two side walls extend from two
opposite sides of said arcuate plate.
6. The pipe cutter as claimed in claim 1, wherein each of said two
side walls has an arcuate recess defined in the side in which the
arcuate notch is defined so as to be adapted to receive a pipe to
be cut.
7. The pipe cutter as claimed in claim 1, wherein each of said
first link and said second link includes two plates connected with
each other with a gap defined between said two plates.
8. The pipe cutter as claimed in claim 1 further comprising a
connecting plate connected between said two side walls.
.Iadd.9. A pipe cutter comprising: a body having two side walls,
said body having a first end with a rod pivotally and movably
extending therethrough and a second end having a first contacting
member rotatably connected thereto; a first link having a first end
thereof pivotably connected to said body and a second end thereof
having a disk blade rotatably connected thereto, said rod pivotally
connected to said first link, and a second link having a first end
thereof pivotally connected to said first link and a second end
thereof having a second contacting member rotatably connected
thereto, a spring biased between said second link and said body,
said second contacting member having two ends each of which is
slidably guided by an associated said side wall of the
body..Iaddend.
.Iadd.10. The pipe cutter as claimed in claim 9 further comprising
a knob connected to one of two ends of the rod..Iaddend.
.Iadd.11. The pipe cutter as claimed in claim 9, wherein said rod
is a threaded rod..Iaddend.
.Iadd.12. The pipe cutter as claimed in claim 9 further comprising
a tube rotatably received in said first end of said body and said
rod movably extending through said tube..Iaddend.
.Iadd.13. The pipe cutter as claimed in claim 9, wherein said body
comprises an arcuate plate and said two side walls extend from two
opposite sides of said arcuate plate..Iaddend.
.Iadd.14. The pipe cutter as claimed in claim 9, wherein each of
said two side walls has an arcuate recess defined therein so as to
be adapted to receive a pipe to be cut..Iaddend.
.Iadd.15. The pipe cutter as claimed in claim 9, wherein each of
said first link and said second link includes two plates connected
with each other with a gap defined between said two
plates..Iaddend.
.Iadd.16. The pipe cutter as claimed in claim 9 further comprising
a connecting plate connected between said two side
walls..Iaddend.
.Iadd.17. A pipe cutter comprising: a body having a first end and a
second end; a rod pivotally and movably extending through the first
end of the body; a first contacting member rotatably connected to
the second end of the body; a first link having a first end thereof
pivotably connected to said body and a second end; a blade
connected to the second end of the first link, said rod pivotally
connected to said first link; a second link having a first end
thereof pivotally connected to said first link and a second end; a
second contacting member rotatably connected to the second end of
the second link; and a spring biased between said second link and
said body, said second link being guided relative to said
body..Iaddend.
.Iadd.18. The pipe cutter as claimed in claim 17 further
comprising: a guide roller connected to the body and adapted to
roll on the second link, with the second link being guided by the
guide roller rolling on the second link when the second link
moves..Iaddend.
.Iadd.19. The pipe cutter as claimed in claim 17, wherein said
second contacting member has a protrusion extending centrally and
longitudinally therefrom; and wherein the body has an arcuate notch
defined therein, with the second link being guided by the
protrusion moving within the notch..Iaddend.
Description
FIELD OF THE INVENTION
The present invention relates to a pipe cutter having two rollers
and disk blade wherein one of the rollers and the disk blade are
movable and connected together by links so that the pipe to be cut
is evenly and firmly clamped by three contacting points.
BACKGROUND OF THE INVENTION
A conventional pipe cutter generally includes a body made of cast
iron, .Iadd.two .Iaddend.fixed .[.two.]. rollers arranged to an
inner side of the body and a movable blade disk movably connected
to a threaded rod which can be moved by rotating a knob connected
to a distal end of the threaded rod. A pipe to be cut can be
clamped by the two fixed rollers and the disk blade which is moved
twoard the two fixed rollers. By rotating the threaded rod, the
disk blade cuts the pipe. However, the speed to move the disk blade
is so slow .[.so.]. that it takes a lot of time to cut the pipe. In
addition, the conventional pipe cutter can be only used to cut
.[.the.]. pipe having .[.the.]. .Iadd.a .Iaddend.smaller diameter,
because the distance between the two rollers is not adjustable so
that a pipe having a large diameter will not .Iadd.be .Iaddend.well
clamped between the two rollers and the disk blade. Furthermore,
the threaded rod can only be moved in a fixed direction and this
limits the positions where the rollers are located. All of the
.[.three.]. .Iadd.prior .Iaddend.pipe cutters are made in a form of
a one-piece article which is made of cast iron which .Iadd.is
.Iaddend.heavy so that the users cannot use them conveniently. The
cost for manufacturing .[.the.]. conventional pipe cutters is high
and therefore reduces the commercial benefit.
The present invention intends to provide an improved pipe cutter
wherein one of .Iadd.the .Iaddend.two rollers is fixed and the
other is movable, the disk blade is movable and pivotally connected
to the movable roller by two links so that the two rollers and the
blade disk clamp the pipe to be cut evenly on the outside of the
pipe, and the pipe cutter of the present invention may clamp pipes
with different diameters.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is
provided a pipe cutter comprising a body having two side walls and
each of the side walls having an arcuate slot defined therethrough.
The body has a first end with a rod movably extending therethrough
and a second end having a first contacting member rotatably
connected thereto. A first link has a first end thereof pivotally
connected to the body and a second end thereof having a disk blade
rotatably connected thereto. The rod is pivotally connected to the
first link. A second link has a first end thereof pivotally
connected to the first link and a second end thereof having a
second contacting member rotatably connected thereto. The second
contacting member has two protrusions extending centrally and
longitudinally therefrom so as to move within the two arcuate
slots.
An object of the present invention is to provide a pipe cutter with
a fixed roller, a movable roller and a movable disk blade so as to
.Iadd.firmly .Iaddend.clamp a pipe to be cut .[.firmly.]. .
Further objects, advantages, and features of the present invention
will become apparent from the following detailed description with
appropriate reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the first embodiment of the pipe
cutter in accordance with the present invention;
FIG. 2 is an exploded view of the first embodiment of the pipe
cutter in accordance with the present invention;
FIG. 3 is an illustrative view .[.to illustrate.]. .Iadd.of
.Iaddend.the first embodiment of the pipe cutter .[.of the.]. in
accordance with the present invention, wherein the two rollers and
the disk blade are moved together;
FIG. 4 is an illustrative view .[.to illustrate.]. .Iadd.of
.Iaddend.the first embodiment of the pipe cutter .[.of the.]. in
accordance with the present invention, wherein a small pipe is
clamped in the pipe cutter;
FIG. 5 is an illustrative view .[.to illustrate.]. .Iadd.of
.Iaddend.the first embodiment of the pipe cutter .[.of the.]. in
accordance with the present invention, wherein a large pipe is
clamped in the pipe cutter;
FIG. 6 is a perspective view of the second embodiment of the pipe
cutter in accordance with the present invention;
FIG. 7 is an exploded view of the second embodiment of the pipe
cutter in accordance with the present invention;
FIG. 8 is an illustrative view .[.to illustrate.]. .Iadd.of
.Iaddend.the second embodiment of the pipe cutter .[.of the.]. in
accordance with the present invention, wherein th two rollers and
the disk blade are moved together;
FIG. 9 is an illustrative view .[.to illustrate.]. .Iadd.of
.Iaddend.the second embodiment of the pipe cutter .[.of the.]. in
accordance with the present invention, wherein a small pipe is
clamped in the pipe cutter;
FIG. 10 is an illustrative view .[.to illustrate.]. .Iadd.of
.Iaddend.the second embodiment of the pipe cutter .[.of the.]. in
accordance with the present invention, wherein a large pipe is
clamped in the pipe cutter;
FIG. 11 is a perspective view of the third embodiment of the pipe
cutter in accordance with the present invention;
FIG. 12 is an exploded view of the .[.second.]. .Iadd.third
.Iaddend.embodiment of the pipe cutter in accordance with the
present invention;
FIG. 13 is an illustrative view .[.to illustrate.]. .Iadd.of
.Iaddend.the .[.second.]. .Iadd.third .Iaddend.embodiment of the
pipe cutter .[.of the.]. in accordance with the present invention,
wherein the two rollers and the disk blade are moved together;
FIG. 14 is an illustrative view .[.to illustrate.]. .Iadd.of
.Iaddend.the third embodiment of the pipe cutter .[.of the.]. in
accordance with the present invention, wherein a small pipe is
clamped in the pipe cutter;
FIG. 15 is an illustrative view .[.to illustrate.]. .Iadd.of
.Iaddend.the third embodiment of the pipe cutter .[.of the.]. in
accordance with the present invention, wherein a large pipe is
clamped in the pipe cutter;
FIG. 16 is an exploded view of the fourth embodiment of the pipe
cutter in accordance with the present invention;
FIG. 17 is an illustrative view .[.to illustrate.]. .Iadd.of
.Iaddend.the fourth embodiment of the pipe cutter .[.of the.]. in
accordance with the present invention;
FIG. 18 is an end view .[.to show.]. .Iadd.of the fourth embodiment
of the pipe cutter in accordance with the present invention,
wherein .Iaddend.the two side walls .Iadd.are .Iaddend.connected
with each other .[.of the fourth embodiment of the pipe cutter.].
;
FIG. 19 is an exploded view of the fifth embodiment of the pipe
cutter in accordance with the present invention, and
FIG. 20 is an illustrative view .[.to illustrate.]. .Iadd.of
.Iaddend.the fifth embodiment of the pipe cutter .[.of the.]. in
accordance with the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIGS. 1 to 4, the pipe cutter in accordance with the
present invention comprises a body 10 having an arcuate plate 101
and the two side walls 102 extending from two opposite sides of the
arcuate plate 101, each of the two side walls 102 having an arcuate
slot 100 defined therethrough. A threaded rod 11 threadably and
movably extends through a tube 111 pivotally received in the first
end of the body10.[., and a.]. .Iadd.. A .Iaddend.first contacting
member 12 is rotatably connected to the body 10. A knob 110
.Iadd.is .Iaddend.connected to one of two ends of the threaded rod
11 and opposite to the first contacting member 12.
A first link 13 has a first end thereof pivotably connected to the
body 10 and a second end thereof having a disk blade 14 rotatably
connected thereto. The other end of the threaded rod 11 is
pivotally connected to the first link 13 so that when moving the
threaded rod 11, the disk blade 14 is moved toward the first
contacting member 12. A second link 15 has a first end thereof
pivotally connected to the first link 13 and a second end thereof
having a second contacting member 16 rotatably connected
thereto.[.which has a.]. .Iadd.. A .Iaddend.pin .[.extending.].
.Iadd.extends .Iaddend.through the second contacting member 16 so
that two protrusions 160 extend centrally and longitudinally from
two ends of the second contacting member 16 and respectively move
within the two arcuate slots 100. The second contacting member 16
is moved according to the movement of the disk blade 14 so that
when moving the disk blade 14 to an extreme position where the disk
blade 14 contacts the first contacting member 12, the second
contacting member 16 is located beside the first contacting member
12. Therefore, when clamping a small pipe 40, the three contacting
points on the pipe 40 are located at an equal angular distance.
Referring to FIG. 5, when a large pipe 41 is clamped by the pipe
cutter, the first contacting member 12 and the second contacting
member 16 are separated wide apart so as to firmly hold the pipe
41.
Each of the two side walls 102 has an arcuate recess 103 defined in
one of two sides thereof so as to receive a pipe 40 to be cut. It
is to be noted that each of the first link 13 and the second link
15 includes two plates connected with each other with a gap defined
between the two plates so that the total weight of the pipe cutter
is reduced. The two plates and the two side walls 102 can be made
of plastic material, and are connected together by rivets so as to
conveniently assemble the pipe cutter.
Referring to FIGS. 6 to 8 showing the second embodiment of the pipe
cutter of the present invention, wherein the pipe cutter comprises
a body 20, having an arcuate plate 201 and two side walls 202
.[.extend.]. .Iadd.extending .Iaddend.from two opposite sides of
the arcuate plate 201. The body 20 has the first end thereof with a
threaded rod 21 movably and pivotally extending therethrough and a
second end having a first contacting member 22 rotatably connected
thereto. The threaded rod 21 extends through the tube 211 which is
pivotally received in the first end of the body 20. A guide roller
200 is connected between the two side walls 202, and a knob 210 is
connected to the threaded rod 21. Each of the two side walls 202
has an arcuate recess 203 defined in one of two sides thereof so as
to be adapted to receive a pipe to be cut.
A first link 23 has a first end thereof pivotably connected to the
body 20 and a second end thereof having a disk blade 24 rotatably
connected thereto.[., the.]. .Iadd.. The .Iaddend.threaded rod 21
.Iadd.is .Iaddend.pivotally connected to the first link 23. A
second link 25 has a first end thereof pivotally connected to the
first link 23 and a second end thereof having a second contacting
member 26 rotatably connected thereto. A spring 250 is biased
between the second link 25 and the body 20.[.and the.]. .Iadd.. The
.Iaddend.guide roller 200 rolls on the back of the second link 25
when the second link 25 moves. The second link 25 has a raised
portion 251 which contacts the guide roller 200 when the second
contacting member 26 is moved beside the first contacting member 22
as shown in FIG. 8. Each of the first link 23 and the second link
25 includes two plates connected with each other with a gap defined
between the two plates.
FIGS. 9 and 10 respectively show the pipe cutter .[.clamps.].
.Iadd.clamping .Iaddend.a small pipe 42 and a large pipe 43,
wherein the second link 25 moves by rolling on the guide roller 200
and the spring 250 pulls the second link 25 to contact the guide
roller 200.
FIGS. 11 and 13 show the third embodiment of the pipe cutter of the
present invention which comprises a body 30 having an arcuate plate
301 and two side walls 302 .[.extend.]. .Iadd.extending
.Iaddend.from two opposite sides of the arcuate plate 301. Each of
the two side walls 302 has an arcuate recess 303 and an arcuate
notch 300 respectively defined in one of two sides thereof.[.,
the.]. .Iadd.. The .Iaddend.arcuate recess 303 .[.communicating.].
.Iadd.communicates .Iaddend.with the arcuate notch 300. The body 30
has a first end with a threaded rod 31 pivotally extending
therethrough and a second end thereof having a first contacting
member 32 rotatably connected therein. The threaded rod 31 extends
through a tube 311 pivotally received in the first end of the body
30 and a knob 310 is connected to one of .Iadd.the .Iaddend.two
ends of the threaded rod 31.
A first link 33 has a first end thereof pivotably connected to the
body 30 and a second end thereof having a disk blade 34 rotatably
connected thereto.[., the.]. .Iadd.. The .Iaddend.rod 31 .Iadd.is
.Iaddend.pivotally connected to the first link 33. A second link 35
has a first end thereof pivotally connected to the first link 33
and a second end thereof having a second contacting member 36
rotatably connected thereto. A spring 350 .Iadd.is .Iaddend.biased
between the second link 35 and the body 30. A pin extends through
the second contacting member 36 so as to have two protrusions 360
extending centrally and longitudinally from two ends of the second
contacting member 36 such that the two protrusions 360 move along
the two arcuate notches 300. Each of the first link 33 and the
second link 35 includes two plates connected with each other with a
gap defined between the two plates.
Referring to FIGS. 14 and 15 which respectively show a small pipe
44 and a large pipe 45 clamped by the pipe cutter, the second
contacting member 36 is moved according to the sizes of the pipes
44, 45.
Referring to FIGS. 16 to 18 showing the fourth embodiment of the
pipe cutter of the present invention, wherein the structure of the
pipe cutter is the same as that shown in FIGS. 11 to 15 except that
the fourth embodiment has no arcuate plate 301 as shown in FIG. 12.
The two side walls 400 of the fourth embodiment of the pipe cutter
are connected together by several rivets 401 so that all the parts
such as the two links 402, 403 and the threaded rod 404 are
received between the two side walls 400. FIGS. 19 and 20 show the
fifth embodiment of the pipe cutter of the present invention,
wherein the pipe cutter of the fifth embodiment is the same as that
of the fourth embodiment except that a connecting plate 501
connects the two side walls 500 of the fifth embodiment and the
connecting plate 501 is made of flexible and durable material so
that the two side walls 500 can be folded toward .[.to.]. each
other corresponding to the connecting plate 501.[., and the.].
.Iadd.. The .Iaddend.two side walls 500 are further connected by
rivets 502.
The invention is not limited to the above embodiment but various
.[.modification.]. .Iadd.modifications .Iaddend.thereof may be
made. It will be understood by those skilled in the art that
various changes in form and detail may .Iadd.be .Iaddend.made
without departing from the scope and spirit of the present
invention.
* * * * *