US20060283002A1 - Method for manufacturing concentric double exhaust pipe for internal combustion engine - Google Patents
Method for manufacturing concentric double exhaust pipe for internal combustion engine Download PDFInfo
- Publication number
- US20060283002A1 US20060283002A1 US11/452,309 US45230906A US2006283002A1 US 20060283002 A1 US20060283002 A1 US 20060283002A1 US 45230906 A US45230906 A US 45230906A US 2006283002 A1 US2006283002 A1 US 2006283002A1
- Authority
- US
- United States
- Prior art keywords
- pipe
- outer pipe
- combustion engine
- internal combustion
- seal member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 24
- 230000006835 compression Effects 0.000 claims description 17
- 238000007906 compression Methods 0.000 claims description 17
- 238000009987 spinning Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 4
- 229910001111 Fine metal Inorganic materials 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 230000003197 catalytic effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/06—Tubes being formed by assembly of stamped or otherwise deformed sheet-metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/24—Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/26—Tubes being formed by extrusion, drawing or rolling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49231—I.C. [internal combustion] engine making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49908—Joining by deforming
- Y10T29/49909—Securing cup or tube between axially extending concentric annuli
- Y10T29/49913—Securing cup or tube between axially extending concentric annuli by constricting outer annulus
Abstract
A concentric double exhaust pipe for an internal combustion engine includes an outer pipe 10 and an inner pipe 20. The outer pipe 10 and inner pipe 20 have basal ends fixed to each other. A seal member 30 arranged between the two pipes 10 and 20 enable sliding of distal ends of the outer pipe 10 and the inner pipe 20 during thermal expansion. When manufacturing the concentric double exhaust pipe, the outer pipe 10 is compressed after attaching the seal member 30 between an inner surface of the outer pipe 10 and an outer surface of the inner pipe 20 so as to compress the seal member 30 to a predetermined outer diameter.
Description
- The present invention relates to a method for manufacturing a concentric double exhaust pipe for an internal combustion engine.
- Japanese Laid-Open Patent Publication No. 6-336921 describes a concentric double exhaust pipe, which is formed by arranging an inner pipe inside an outer pipe, used as an exhaust passage for an internal combustion engine. In the concentric double exhaust pipe, the two pipes have basal ends that are fixed to each other through welding or the like and distal ends that are free to tolerate thermal deformation in the axial direction of the pipes. More specifically, as shown in
FIG. 3 , after fixing the basal ends, which are not shown in the drawings, of anouter pipe 1 and aninner pipe 20 to each other, a wire mesh 3 is attached in a compressed state between the inner surface of theouter pipe 1 and the outer surface of theinner pipe 20 at the distal ends. This fixes the basal ends of theouter pipe 1 andinner pipe 20 and seals the distal ends of theouter pipe 1 andinner pipe 20 in a manner enabling sliding therebetween when thermal expansion occurs. - Normally, dimensional tolerance is provided for the inner diameter of the
outer pipe 1 and the outer diameter of theinner pipe 20. This produces differences in the gap between the inner surface of theouter pipe 1 and the outer surface of theinner pipe 20. Therefore, if the gap between the inner surface of theouter pipe 1 and the outer surface of theinner pipe 20 is larger than the specified value for the thickness of wire mesh 3, the compression level of the wire mesh becomes too small. This causes the contact pressure of the wire mesh 3 against theouter pipe 1 and theinner pipe 20 to be less than the designed value. On the other hand, if the gap between the inner surface of theouter pipe 1 and the outer surface of theinner pipe 20 is smaller than the specified value for the thickness of the wire mesh 3, the compression level of the wire mesh becomes too high. This causes the contact pressure of the wire mesh 3 against theouter pipe 1 and theinner pipe 20 to be greater than the designed value. Further, when the gap is too small in relation with thickness of the wire mesh 3, the wire mesh 3 may become crimped. As a result, the sliding and sealing characteristics may not be satisfactory. - Such a problem occurs when manufacturing a concentric double exhaust pipes for an internal combustion engine enabling sliding during thermal expansion of the distal ends of the outer pipe and inner pipe by fixing the basal ends of the outer pipe and inner pipe and attaching a seal member between the inner surface of the outer pipe and the outer surface of the inner pipe.
- It is an object of the present invention to provide a manufacturing method for a concentric double exhaust pipe for an internal combustion engine that facilitates attachment of a seal member between an outer pipe and an inner pipe and facilitates control of contact pressure of a seal member against an outer pipe and an inner pipe.
- One aspect of the present invention is a concentric double exhaust pipe for an internal combustion engine including an outer pipe and inner pipe having basal ends fixed to each other. A seal member is arranged between the outer pipe and the inner pipe and enables relative movement of distal ends of the outer pipe and the inner pipe during thermal expansion. A method for manufacturing the concentric double exhaust pipe includes compressing the outer pipe after attaching the seal member between an inner surface of the outer pipe and an outer surface of the inner pipe so as to compress the seal member to a predetermined outer diameter.
-
FIG. 1 is a cross-sectional diagram of a concentric double exhaust pipe according to a preferred embodiment of the present invention prior to compression; -
FIG. 2 is a cross-sectional diagram of the concentric double exhaust pipe subsequent to compression; and -
FIG. 3 is a cross-sectional diagram of a concentric double exhaust pipe in the prior art. - A process for manufacturing a catalytic converter arranged in an exhaust passage of an internal combustion engine according to a preferred embodiment of the present invention will now be described with reference to
FIGS. 1 and 2 . -
FIG. 1 is a cross-sectional diagram of a concentric double exhaust pipe for the catalytic converter showing a state prior to compression. - As shown in
FIG. 1 , the concentric double exhaust pipe of the catalytic converter includes anouter pipe 10, aninner pipe 20, and awire mesh 30. Theouter pipe 10 is formed from a steel metal. Theouter pipe 10 has an outer diameter and an inner diameter, which are constant. - The
inner pipe 20 includes aconstant diameter portion 22, an enlargeddiameter portion 24, and anend portion 24 e. Theconstant diameter portion 22 is concentric with theouter pipe 10. The outer diameter and inner diameter of theinner pipe 20 are each constant along theconstant diameter portion 22. The enlargeddiameter portion 24 has an end located at the upstream side of the exhaust and is welded to the outer surface of theconstant diameter portion 22. The outer diameter and inner diameter of theinner pipe 20 at the enlargeddiameter portion 24 gradually increases in the downstream direction of the exhaust. Theend portion 24 e is located at the downstream side of the enlarged diameter portion. The outer diameter and inner diameter of theinner pipe 20 at theend portion 24 e are each constant. - The
outer pipe 10 and theinner pipe 20 have basal portions at the upstream side of the exhaust that are welded to a fastening portion, which is not shown in the drawing. Awire mesh 30, which functions as a seal member, is arranged between the inner surface of theouter pipe 10 and the outer surface of theend portion 24 e of theinner pipe 20. Thewire mesh 30 is formed from fine metal wires. The wire mesh 30 seals the gap between the inner surface of theouter pipe 10 and the outer surface of theend portion 24 e of theinner pipe 20. Further, thewire mesh 30 enables sliding of the twopipes outer pipe 10 and theinner pipe 20 thermally deform. - With reference to
FIGS. 1 and 2 , the manufacturing procedures for the concentric double exhaust pipe when thewire mesh 30, which is attached to theend portion 24 e of theinner pipe 20, has a diameter d3 o smaller than an inner diameter d1 i of theouter pipe 10, that is, when a gap exists between the inner surface of theouter pipe 10 and the outer surface of thewire mesh 30 will now be discussed. - The concentric double exhaust pipe is manufactured in the following order from (1) to (10).
- (1) As shown in
FIG. 1 , the basal portion at the exhaust upstream side of the enlargeddiameter portion 24 is welded and connected to the distal portion at the exhaust downstream side of theconstant diameter portion 22 to assemble theinner pipe 20. - (2) The
outer pipe 10 is arranged concentrically with theinner pipe 20, and the basal portions at the exhaust upstream side of theouter pipe 10 and theinner pipe 20 are respectively welded to the fastening portion (not shown). - (3) The inner diameter d1 i and outer diameter d1 o of the
outer pipe 10 are each measured at a section corresponding to the attachment position of thewire mesh 30. Then, the thickness Δd1 of theouter pipe 10 is calculated from the measured inner diameter d1 i and the outer diameter d1 o. - (4) The outer diameter d2 o of the
end portion 24 e is measured. - (5) The
wire mesh 30 is widened in the radial direction and attached to the outer surface of theend portion 24 e. - (6) The outer diameter d3 o of the
wire mesh 30 in a state attached to theend portion 24 e is measured. - (7) The thickness Δd3 of the
wire mesh 30 is calculated from the outer diameter d3 o of thewire mesh 30 and the outer diameter d2 o of theend portion 24 e. - (8) A target thickness Δd3 t, which is a compression target for the
wire mesh 30, is calculated from the thickness Δd3 of thewire mesh 30. - (9) A target outer diameter d1 ot, which is a compression target for the
outer pipe 10, is calculated from the outer diameter d1 o and thickness Δd1 of theouter pipe 10 and thickness Δd3 and target thickness Δd3 t of thewire mesh 30. - (10) As shown in
FIG. 2 , a spinning process is performed to compress theouter pipe 10 until the outer diameter d1 o of theouter pipe 10 becomes equal to the target outer diameter d1 ot. More specifically, a mold (not shown) is fixed to theend portion 24 e of theinner pipe 20. In this state, a roller (not shown) is pressed against the outer surface of theouter pipe 10 while rotating theouter pipe 10 together with theinner pipe 20. Further, the moving velocity of the roller in the axial direction and the feed amount of the roller in the radial direction are adjusted. The roller is pressed against the outer surface of theouter pipe 10 to compress theouter pipe 10 and thewire mesh 30 until the outer diameter d1 o of theouter pipe 10 becomes equal to the outer pipe target outer diameter d1 ot. - The preferred embodiment has the advantages described below.
- (1) In the preferred embodiment, after the
wire mesh 30 is attached between the inner surface of theouter pipe 10 and the outer surface of theinner pipe 20, theouter pipe 10 is compressed so as to compress thewire mesh 30 to the predetermined outer diameter. In this case, during the attachment of thewire mesh 30, the gap between the inner surface of theouter pipe 10 and the outer surface of theinner pipe 20 may be enlarged. This facilitates the attachment of thewire mesh 30 between the inner surface of theouter pipe 10 and the outer surface of theinner pipe 20. Further, the compression of theouter pipe 10 absorbs the dimensional tolerances of theouter pipe 10, theinner pipe 20, and thewire mesh 30. This facilitates control of the contact pressure of thewire mesh 30 against theouter pipe 10 and theinner pipe 20. - (2) The spinning process compresses the
outer pipe 10. The spinning process is optimal for processes that require a high dimensional accuracy. The compression of theouter pipe 10 through spinning finely adjusts the compression level of thewire mesh 30. Thus, the sliding and sealing characteristics obtained by thewire mesh 30 may be finely controlled. - (3) The thickness Δd3 of the
wire mesh 30 when attached to theend portion 24 e of theinner pipe 20 is measured, and the compression level of theouter pipe 10 is adjusted based on the measurement result. In this case, the compression force applied to thewire mesh 30 by theouter pipe 10 is accurately adjusted. Thus, the sliding and sealing characteristics obtained by thewire mesh 30 are improved. - (4) Due to the requirement for high heat resistance, the
wire mesh 30 is often used as a seal member in a concentric double exhaust pipe for an internal combustion engine. However, the elasticity of thewire mesh 30 is not that high. It is thus difficult to adjust the contact pressure of thewire mesh 30 against theouter pipe 10 and theinner pipe 20 to a predetermined value. Further, thewire mesh 30 may be crimped when thewire mesh 30 is attached between theouter pipe 10 and theinner pipe 20. - In the preferred embodiment, even if the
wire mesh 30, which is formed from fine metal wires, is used as the seal member, the arrangement of the seal member in the gap between theouter pipe 10 and theinner pipe 20 is facilitated. Further, the contact pressure of the seal member against theouter pipe 10 and theinner pipe 20 is controlled to a predetermined value. - The above embodiment may be modified as described below.
- In the preferred embodiment, the
wire mesh 30 is used as the seal member. However, a seal member formed from, for example, a heat resistant resin may also be used. - In the preferred embodiment, the measurement of the outer diameter d1 o and the inner diameter d1 i of the
outer pipe 10 may be eliminated. Further, the measurement of the outer diameter d3 o of thewire mesh 30 and the outer diameter d2 o of theinner pipe 20 may be eliminated. This would lower the accuracy of the compression level of theouter pipe 10 and thewire mesh 30. However, the attachment of thewire mesh 30 would be facilitated, and the dimensional tolerances of theouter pipe 10, theinner pipe 20, and thewire mesh 30 would be absorbed. - In the preferred embodiment, the spinning process for compressing the
outer pipe 10 and thewire mesh 30 may be changed to other processes, such as a pressing process. - The present invention is embodied in a catalytic converter for eliminating harmful substances from exhaust gas. However, the present invention may be embodied in a muffler that is arranged in an exhaust passage. In other words, the present invention may be applied to any concentric double exhaust pipe having an outer pipe and inner pipe with fixed basal ends and distal ends allowed to slide.
- In the preferred embodiment, instead of compressing the
outer pipe 10 after attaching thewire mesh 30 between the inner surface of theouter pipe 10 and the outer surface of theinner pipe 20, theinner pipe 20 may undergo a diameter enlargement process to compress thewire mesh 30. Such processing would be more difficult than the compression of theouter pipe 10. However, this would facilitate the attachment of thewire mesh 30 and absorb the dimensional tolerances of theouter pipe 10, theinner pipe 20, and thewire mesh 30. Further, the contact pressure of thewire mesh 30 against theouter pipe 10 and theinner pipe 20 may be controlled.
Claims (12)
1. A method for manufacturing a concentric double exhaust pipe for an internal combustion engine, the exhaust pipe including an outer pipe and inner pipe having basal ends fixed to each other, with the inner pipe arranged in the outer pipe, and a seal member arranged between the outer pipe and the inner pipe and enabling relative movement of distal ends of the outer pipe and the inner pipe during thermal expansion, the method comprising:
compressing the outer pipe after attaching the seal member between an inner surface of the outer pipe and an outer surface of the inner pipe so as to compress the seal member to a predetermined outer diameter.
2. The method for manufacturing a concentric double exhaust pipe for an internal combustion engine according to claim 1 , wherein the outer pipe is compressed through a spinning process.
3. The method for manufacturing a concentric double exhaust pipe for an internal combustion engine according to claim 1 , wherein the outer pipe is compressed through a pressing process.
4. The method for manufacturing a concentric double exhaust pipe for an internal combustion engine according to claim 1 , further comprising:
measuring thickness of the seal member when attached to the outer surface of the inner pipe and adjusting compression level of the outer pipe based on the measurement.
5. The method for manufacturing a concentric double exhaust pipe for an internal combustion engine according to claim 4 , further comprising:
calculating a target diameter, which is a compression target for the outer pipe, based on the outer diameter and thickness of the outer pipe and a target thickness, which is a compression target, for the seal member.
6. The method for manufacturing a concentric double exhaust pipe for an internal combustion engine according to claim 1 , wherein the seal member has an outer diameter measured when attached to the outer surface of the inner pipe that is set to be smaller than an inner diameter of the outer pipe.
7. The method for manufacturing a concentric double exhaust pipe for an internal combustion engine according to claim 1 , wherein the seal member is attached to the outer surface of the inner pipe in a state in which the seal member is widened in the radial direction.
8. The method for manufacturing a concentric double exhaust pipe for an internal combustion engine according to claim 1 , further comprising:
fixing a mold inside the inner pipe and pressing a roller against an outer surface of the outer pipe while rotating the outer pipe together with the inner pipe.
9. The method for manufacturing a concentric double exhaust pipe for an internal combustion engine according to claim 8 , further comprising:
adjusting moving velocity of the roller in the axial direction of the outer pipe and feed amount of the roller in the radial direction of the outer pipe to compress the outer pipe.
10. The method for manufacturing a concentric double exhaust pipe for an internal combustion engine according to claim 1 , wherein the seal member is a wire mesh formed from fine metal wires.
11. The method for manufacturing a concentric double exhaust pipe for an internal combustion engine according to claim 1 , wherein the outer pipe is formed from a steel metal.
12. A method for manufacturing a concentric double exhaust pipe for an internal combustion engine, the exhaust pipe including an outer pipe and inner pipe having basal ends fixed to each other, with the inner pipe arranged in the outer pipe, and a seal member arranged between the outer pipe and the inner pipe and enabling relative movement of distal ends of the outer pipe and the inner pipe during thermal expansion, the method comprising:
performing a diameter enlargement process on the inner pipe after attaching the seal member between an inner surface of the outer pipe and an outer surface of the inner pipe so as to compress the seal member to a predetermined outer diameter.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005176833A JP4513665B2 (en) | 2005-06-16 | 2005-06-16 | Method for manufacturing a double exhaust pipe of an internal combustion engine |
JP2005-176833 | 2005-06-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060283002A1 true US20060283002A1 (en) | 2006-12-21 |
Family
ID=37571901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/452,309 Abandoned US20060283002A1 (en) | 2005-06-16 | 2006-06-14 | Method for manufacturing concentric double exhaust pipe for internal combustion engine |
Country Status (2)
Country | Link |
---|---|
US (1) | US20060283002A1 (en) |
JP (1) | JP4513665B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11377990B2 (en) | 2019-01-09 | 2022-07-05 | Futaba Industrial Co., Ltd. | Exhaust pipe |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2022095467A (en) * | 2020-12-16 | 2022-06-28 | フタバ産業株式会社 | Exhaust pipe |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6082353A (en) * | 1996-10-18 | 2000-07-04 | Van Doorn; Andrew | Solar panel and method of manufacturing thereof |
US6223434B1 (en) * | 1997-04-02 | 2001-05-01 | Sango Co., Ltd. | Muffler and its manufacturing method |
US20020088667A1 (en) * | 2001-01-11 | 2002-07-11 | Sankei Giken Kogyo Kabushiki Kaisya | Engine muffler and method of manufacturing the same |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0742547A (en) * | 1993-08-03 | 1995-02-10 | Calsonic Corp | Double pipe for exhaust system for vehicle |
JPH084525A (en) * | 1994-06-20 | 1996-01-09 | Calsonic Corp | Bent double exhausting device and its manufacture |
JPH084524A (en) * | 1994-06-20 | 1996-01-09 | Calsonic Corp | Bent double exhausting device and its manufacture |
JP2000154715A (en) * | 1998-11-19 | 2000-06-06 | Sango Co Ltd | Exhaust device for internal combustion engine and sub- muffler used for the same |
JP4511744B2 (en) * | 2001-01-31 | 2010-07-28 | 株式会社三五 | Exhaust pipe and method of manufacturing exhaust pipe |
JP2004162610A (en) * | 2002-11-13 | 2004-06-10 | Sakamoto Industry Co Ltd | Bent double exhaust pipe |
-
2005
- 2005-06-16 JP JP2005176833A patent/JP4513665B2/en not_active Expired - Fee Related
-
2006
- 2006-06-14 US US11/452,309 patent/US20060283002A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6082353A (en) * | 1996-10-18 | 2000-07-04 | Van Doorn; Andrew | Solar panel and method of manufacturing thereof |
US6223434B1 (en) * | 1997-04-02 | 2001-05-01 | Sango Co., Ltd. | Muffler and its manufacturing method |
US20020088667A1 (en) * | 2001-01-11 | 2002-07-11 | Sankei Giken Kogyo Kabushiki Kaisya | Engine muffler and method of manufacturing the same |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11377990B2 (en) | 2019-01-09 | 2022-07-05 | Futaba Industrial Co., Ltd. | Exhaust pipe |
Also Published As
Publication number | Publication date |
---|---|
JP4513665B2 (en) | 2010-07-28 |
JP2006348864A (en) | 2006-12-28 |
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Legal Events
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AS | Assignment |
Owner name: TOYOTA JIDOSHA KABUSHIKI KAISHA, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KURODA, MASAHARU;NOBATA, YASUHIRO;MURATA, TOSHIO;AND OTHERS;REEL/FRAME:018210/0033 Effective date: 20060810 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |