US20080251060A1 - Carbon/aluminum paintball barrel with built in silencer - Google Patents

Carbon/aluminum paintball barrel with built in silencer Download PDF

Info

Publication number
US20080251060A1
US20080251060A1 US11/650,522 US65052207A US2008251060A1 US 20080251060 A1 US20080251060 A1 US 20080251060A1 US 65052207 A US65052207 A US 65052207A US 2008251060 A1 US2008251060 A1 US 2008251060A1
Authority
US
United States
Prior art keywords
barrel
carbon
paintball
aluminum
fiberglass
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
Application number
US11/650,522
Inventor
Glen Mitchell Thurber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US11/650,522 priority Critical patent/US20080251060A1/en
Publication of US20080251060A1 publication Critical patent/US20080251060A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41BWEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00Compressed-gas guns, e.g. air guns; Steam guns
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41AFUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A21/00Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
    • F41A21/02Composite barrels, i.e. barrels having multiple layers, e.g. of different materials
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41AFUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A21/00Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
    • F41A21/30Silencers

Definitions

  • the present invention relates to a paintball barrel that utilizes a carbon or fiberglass material that surrounds an aluminum core.
  • the barrel may also utilize a unidirectional carbon of fiberglass with a cross bias.
  • the barrel utilizes a built in silencer. More particularly a barrel that utilizes a woven/non woven carbon or fiberglass material that is wrapped around an aluminum tube, the fibers contained within the barrel are composed of a vibration dampening material.
  • Another particularly method of the barrel utilizes an aluminum tube as an insert into a woven carbon or fiberglass tube with a greater diameter. The hollow aluminum bore is glued into the woven tube to form the carbon/aluminum barrel.
  • Paintball barrels at the present time are an aluminum tube or all carbon material.
  • the problems with the aluminum barrel are any thin walled barrel can bend or break under pressure.
  • Another disadvantage with aluminum is thick walled barrels tend to add weight to the marker.
  • Another disadvantage with aluminum the barrel tend to sweat or condensate under certain weather conditions, also the barrel may absorb the heat and humidity that exist in the outdoors.
  • Carbon barrels consist of different problems. The main problem with carbon barrels is when the paint ball travels through the barrel it wears down the resin coating on the inside of the barrel. The resin coating inside the barrel will wear away in a short time, exposing the carbon fibers. Once the fibers are exposed it will create breakage of the paintball when it passes through the barrel.
  • the other major problem with all carbon barrels are the portholes that are drilled in the muzzle end of the barrel.
  • the portholes are used as a method to reduce the noise when the air exists the barrel. As the paintball travels past the portholes it will start to pick at the fibers around the portholes, exposing the fibers.
  • the present invention eliminates many of these problems by utilizing a woven carbon barrel with an aluminum core and a built in silencer.
  • the fibers, woven carbon or fiberglass are used as a vibration dampening material.
  • Another advantage of the present invention is portholes can be drilled in the barrel without affecting the carbon fibers.
  • Another advantage of the present invention is the aluminum core protects the carbon fibers so the resin will not wear away.
  • Another advantage of the present invention is the woven material will act an a insulator for the aluminum core, heat and humidity will not affect the aluminum.
  • Another advantage of the present invention is the woven material is a vibration or silencing material.
  • Another advantage is a built in silencer on the muzzle end will greatly reduce the sound as a paint ball exists the barrel so no port holes are needed.
  • a paintball barrel that utilizes a carbon or fiberglass cover with an aluminum interior :
  • a paintball barrel of present invention wherein the barrel is a combination of carbon or fiberglass and aluminum.
  • the paintball barrel utilizes woven material as a cover around a hollow aluminum tube, unidirectional carbon or fiberglass may also be used.
  • the barrel also has a built in silencer at the muzzle end and a built in barrel connection at the breech end.
  • FIG. 1 is a side view of the carbon/aluminum barrel with built-in silencer.
  • FIG. 2 shows a cross-section of the present invention.
  • FIG. 3 depicts an aluminum tube being inserted in a woven cover in the method of manufacture.
  • FIG. 4 depicts the present invention with an aluminum barrel extension at the breech end used when a clamping system attaches the barrel to the marker.
  • FIG. 5 shows an interior-section of the barrel with a barrel adapter installed in the breech end.
  • FIG. 6 shows a woven material being wrapped around an aluminum tube in the method of manufacture.
  • the carbon/aluminum barrel ( FIG. 5 ) of the present invention comprises of a thin walled aluminum tube 1 , a woven carbon or fiberglass cover 2 and a binder holding them together.
  • a sheet of woven/non woven material 3 embedded in a resin is trimmed to produce a pattern.
  • the aluminum tube 4 is coated with a tacking agent 5 which allows the material to adhere on the aluminum tube 4 .
  • the woven material 3 is rolled around the aluminum tube 4 by hand or by using a rolling table which has a top portion that slidingly engages a bottom portion.
  • the aluminum tube 4 with pattern attached are placed on the bottom portion of the rolling table and the top portion rolls over the bottom portion causing the woven material 3 to roll onto the aluminum tube 4 . This process gives great compression of the material to the aluminum.
  • the carbon/aluminum barrel FIG. 1 is covered with a polypropylene tape or a release film, by using a cello wrapping machine that puts a tension controlled tape on the barrel. This gives the material greater compression on the aluminum tube.
  • the carbon aluminum barrel is heated to about 250-300 degrees Fahrenheit for the proper time.
  • the heating causes the resin to cure producing a strong barrel by the combination of the woven material and aluminum.
  • the release film or tape prevents the material from melting and falling off the aluminum tube. Also, the tape shrinks when heated and creates a better lamination of the fibers.
  • the aluminum tube 7 is covered with a silencing material 8 such as woven carbon or fiberglass.
  • the muzzle is covered with three additional wraps of material 8 to form a silencer 9 .
  • the additional wraps of material 8 helps to reduce the sound as air exits the barrel.
  • the woven material 10 is formed around an aluminum tube.
  • FIG. 3 shows another method in the manufacture of the barrel, an aluminum tube 12 is inserted into a carbon or fiberglass tube 13 .
  • the aluminum tube is glued inside the woven tube. Unidirectional fibers may also be used.
  • FIG. 4 of the present invention shows the carbon/aluminum barrel 14 with an extension of the aluminum tube 15 to be used for a clamping style marker wherein the barrel is secured to the marker by a clamping system at the breech end.
  • FIG. 5 shows a barrel adapter 16 on the end of the barrel that is threaded at the end. This adapter is used to screw into a threaded marker. The breech end 15 can also be threaded 17 to secure the barrel to the marker.
  • FIG. 5 also shows a cut away section with aluminum tube 1 core and a woven carbon or fiberglass cover 2 .

Abstract

A barrel system for a paintball marker that utilizes a carbon or fiberglass outer layer surrounding a hollow aluminum inner layer. The barrel can be manufactured with a woven carbon or fiberglass. The barrel may also use a unidirectional carbon or fiberglass. The unidirectional material utilizes a number of fibers longitudinally oriented along the aluminum bore and a number of fibers biased to the longitudinally oriented fibers. The barrel includes a built in silencer at the muzzle end. The barrel also includes a built in barrel connection at the breech end.

Description

    FIELD OF THE INVENTION
  • The present invention relates to a paintball barrel that utilizes a carbon or fiberglass material that surrounds an aluminum core. The barrel may also utilize a unidirectional carbon of fiberglass with a cross bias. The barrel utilizes a built in silencer. More particularly a barrel that utilizes a woven/non woven carbon or fiberglass material that is wrapped around an aluminum tube, the fibers contained within the barrel are composed of a vibration dampening material. Another particularly method of the barrel utilizes an aluminum tube as an insert into a woven carbon or fiberglass tube with a greater diameter. The hollow aluminum bore is glued into the woven tube to form the carbon/aluminum barrel.
  • BACKGROUND OF THE INVENTION
  • Paintball barrels at the present time are an aluminum tube or all carbon material. The problems with the aluminum barrel are any thin walled barrel can bend or break under pressure. Another disadvantage with aluminum is thick walled barrels tend to add weight to the marker. Another disadvantage with aluminum the barrel tend to sweat or condensate under certain weather conditions, also the barrel may absorb the heat and humidity that exist in the outdoors. Carbon barrels consist of different problems. The main problem with carbon barrels is when the paint ball travels through the barrel it wears down the resin coating on the inside of the barrel. The resin coating inside the barrel will wear away in a short time, exposing the carbon fibers. Once the fibers are exposed it will create breakage of the paintball when it passes through the barrel. The other major problem with all carbon barrels are the portholes that are drilled in the muzzle end of the barrel. The portholes are used as a method to reduce the noise when the air exists the barrel. As the paintball travels past the portholes it will start to pick at the fibers around the portholes, exposing the fibers.
  • The present invention eliminates many of these problems by utilizing a woven carbon barrel with an aluminum core and a built in silencer. The fibers, woven carbon or fiberglass are used as a vibration dampening material.
  • The advantage of a combination of carbon and aluminum provide a very strong, durable barrel that is lightweight.
  • Another advantage of the present invention is portholes can be drilled in the barrel without affecting the carbon fibers.
  • Another advantage of the present invention is the aluminum core protects the carbon fibers so the resin will not wear away.
  • Another advantage of the present invention is the woven material will act an a insulator for the aluminum core, heat and humidity will not affect the aluminum.
  • Another advantage of the present invention is the woven material is a vibration or silencing material.
  • Another advantage is a built in silencer on the muzzle end will greatly reduce the sound as a paint ball exists the barrel so no port holes are needed.
  • What is Claimed
  • A paintball barrel that utilizes a carbon or fiberglass cover with an aluminum interior:
    • 1. A paintball barrel with a built in silencer.
    • 2. A paintball barrel wherein the cover material is a woven or vibration dampening material.
    • 3. A paintball barrel wherein the cover material is a plurality of unidirectional carbon or fiberglass fibers embedded in a resin.
    • 4. A paintball barrel wherein the cover material is a woven carbon or fiberglass pre-preg.
    • 5. A paintball barrel wherein the barrel cover is a woven carbon or fiberglass with an hollow aluminum core.
    • 6. A paintball barrel wherein the method of manufacture is wrapping the material around an aluminum tube.
    • 7. A paintball barrel wherein the barrel has an aluminum tube glued into a woven carbon or fiberglass cover, unidirectional fibers may also be used.
    • 8. A paintball barrel that utilizes the extended aluminum tube in the breech end as a barrel back extension that clamps into the paint ball marker.
    DESCRIPTION Summary of the Invention
  • A paintball barrel of present invention wherein the barrel is a combination of carbon or fiberglass and aluminum. The paintball barrel utilizes woven material as a cover around a hollow aluminum tube, unidirectional carbon or fiberglass may also be used. The barrel also has a built in silencer at the muzzle end and a built in barrel connection at the breech end.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a side view of the carbon/aluminum barrel with built-in silencer.
  • FIG. 2 shows a cross-section of the present invention.
  • FIG. 3 depicts an aluminum tube being inserted in a woven cover in the method of manufacture.
  • FIG. 4 depicts the present invention with an aluminum barrel extension at the breech end used when a clamping system attaches the barrel to the marker.
  • FIG. 5 shows an interior-section of the barrel with a barrel adapter installed in the breech end.
  • FIG. 6 shows a woven material being wrapped around an aluminum tube in the method of manufacture.
  • DETAILED DESCRIPTION OF THE PRESENT INVENTION
  • The carbon/aluminum barrel (FIG. 5) of the present invention comprises of a thin walled aluminum tube 1, a woven carbon or fiberglass cover 2 and a binder holding them together. In the first step a sheet of woven/non woven material 3 embedded in a resin is trimmed to produce a pattern. The aluminum tube 4 is coated with a tacking agent 5 which allows the material to adhere on the aluminum tube 4.
  • As can be seen best in FIG. 6 the woven material 3 is rolled around the aluminum tube 4 by hand or by using a rolling table which has a top portion that slidingly engages a bottom portion. The aluminum tube 4 with pattern attached are placed on the bottom portion of the rolling table and the top portion rolls over the bottom portion causing the woven material 3 to roll onto the aluminum tube 4. This process gives great compression of the material to the aluminum.
  • In the next step the carbon/aluminum barrel FIG. 1 is covered with a polypropylene tape or a release film, by using a cello wrapping machine that puts a tension controlled tape on the barrel. This gives the material greater compression on the aluminum tube.
  • Next, the carbon aluminum barrel is heated to about 250-300 degrees Fahrenheit for the proper time. The heating causes the resin to cure producing a strong barrel by the combination of the woven material and aluminum. The release film or tape prevents the material from melting and falling off the aluminum tube. Also, the tape shrinks when heated and creates a better lamination of the fibers.
  • As can be seen best in FIG. 1 the aluminum tube 7 is covered with a silencing material 8 such as woven carbon or fiberglass. The muzzle is covered with three additional wraps of material 8 to form a silencer 9. The additional wraps of material 8 helps to reduce the sound as air exits the barrel.
  • As can be seen best in FIG. 2 the woven material 10 is formed around an aluminum tube.
  • FIG. 3 shows another method in the manufacture of the barrel, an aluminum tube 12 is inserted into a carbon or fiberglass tube 13. The aluminum tube is glued inside the woven tube. Unidirectional fibers may also be used.
  • FIG. 4 of the present invention shows the carbon/aluminum barrel 14 with an extension of the aluminum tube 15 to be used for a clamping style marker wherein the barrel is secured to the marker by a clamping system at the breech end.
  • FIG. 5 shows a barrel adapter 16 on the end of the barrel that is threaded at the end. This adapter is used to screw into a threaded marker. The breech end 15 can also be threaded 17 to secure the barrel to the marker. FIG. 5 also shows a cut away section with aluminum tube 1 core and a woven carbon or fiberglass cover 2.

Claims (10)

1. A paintball barrel that utilizes a hollow bore surrounded by a thin metallic inner layer and a carbon or graphite outer layer
2. A paintball barrel with a built in silencer.
3. A paintball barrel according to claim 2, wherein the cover material is a woven or vibration dampening material.
4. A paintball barrel according to claim 1, wherein the cover material is a plurality of unidirectional carbon or fiberglass fibers embedded in a resin.
5. A paintball barrel according to claim 1, wherein the cover material is a woven carbon or fiberglass pre-preg.
6. A paintball barrel according to claim 1, wherein the inner layer is aluminum.
7. A paintball barrel according to claim 1, wherein the barrel cover is unidirectional fibers that is manufactured from graphite or fiberglass.
8. A paintball barrel wherein the method of manufacture is wrapping the material around an aluminum tube.
9. A paintball barrel according to claim 7, wherein the barrel has an aluminum tube glued into a woven carbon or fiberglass cover.
10. A paintball barrel according to claim 1, that utilizes the extended aluminum tube in the breech end as a barrel back that clamps into the paintball marker.
US11/650,522 2007-01-08 2007-01-08 Carbon/aluminum paintball barrel with built in silencer Abandoned US20080251060A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/650,522 US20080251060A1 (en) 2007-01-08 2007-01-08 Carbon/aluminum paintball barrel with built in silencer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/650,522 US20080251060A1 (en) 2007-01-08 2007-01-08 Carbon/aluminum paintball barrel with built in silencer

Publications (1)

Publication Number Publication Date
US20080251060A1 true US20080251060A1 (en) 2008-10-16

Family

ID=39852583

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/650,522 Abandoned US20080251060A1 (en) 2007-01-08 2007-01-08 Carbon/aluminum paintball barrel with built in silencer

Country Status (1)

Country Link
US (1) US20080251060A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100058922A1 (en) * 2007-01-12 2010-03-11 Industrias El Gamo Sa Air or fire rifle with noise dampener
CN102529131A (en) * 2010-12-28 2012-07-04 北京新风机械厂 Manufacture method of launch tube
US20150000645A1 (en) * 2012-01-13 2015-01-01 Gamo Outdoors, S.L. Method for the manufacture of a barrel for compressed air or co2 rifles and barrel for compressed air or co2 rifles obtained
US9835400B2 (en) 2014-12-26 2017-12-05 Sturm, Ruger & Company, Inc. Integrally suppressed barrel for firearm
US9857137B2 (en) 2014-12-26 2018-01-02 Sturm, Ruger & Company Silencer for firearm
US9933224B2 (en) 2016-08-03 2018-04-03 Robert Lindsey Dorne Modular gun silencer
US10480888B2 (en) 2014-12-26 2019-11-19 Sturm, Ruger & Company, Inc. Silencer for firearm
US11385013B2 (en) 2016-07-01 2022-07-12 Blackpowder Products, Inc. Hybrid carbon—steel firearm barrel
USD1018757S1 (en) 2020-09-17 2024-03-19 Blackpowder Products, Inc. Firearm barrel

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847786A (en) * 1955-02-07 1958-08-19 Olin Mathieson Composite firearm barrel comprising glass fibers
US3228298A (en) * 1960-04-20 1966-01-11 Andrew J Grandy Rifle barrel
US5285592A (en) * 1991-10-31 1994-02-15 Atlantic Research Corporation Motor case with composite overwrap and method
US6189431B1 (en) * 1998-01-26 2001-02-20 Remington Arms Company, Inc. Small caliber gun barrel
US6457274B2 (en) * 1999-06-30 2002-10-01 David B. Smith Composite tube for gun barrel
US6889464B2 (en) * 2003-06-04 2005-05-10 Michael K. Degerness Composite structural member
US20060260597A1 (en) * 2005-05-23 2006-11-23 Anderson Kenneth K Barrel system for a paintball marker
US7152357B2 (en) * 1999-05-14 2006-12-26 Michaels Of Oregon Co. Composite firearm barrel assemblies

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847786A (en) * 1955-02-07 1958-08-19 Olin Mathieson Composite firearm barrel comprising glass fibers
US3228298A (en) * 1960-04-20 1966-01-11 Andrew J Grandy Rifle barrel
US5285592A (en) * 1991-10-31 1994-02-15 Atlantic Research Corporation Motor case with composite overwrap and method
US6189431B1 (en) * 1998-01-26 2001-02-20 Remington Arms Company, Inc. Small caliber gun barrel
US7152357B2 (en) * 1999-05-14 2006-12-26 Michaels Of Oregon Co. Composite firearm barrel assemblies
US6457274B2 (en) * 1999-06-30 2002-10-01 David B. Smith Composite tube for gun barrel
US6889464B2 (en) * 2003-06-04 2005-05-10 Michael K. Degerness Composite structural member
US20060260597A1 (en) * 2005-05-23 2006-11-23 Anderson Kenneth K Barrel system for a paintball marker

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9157692B2 (en) 2007-01-12 2015-10-13 Gamo Outdoor S.L. Rifle with a noise damper
US8261651B2 (en) * 2007-01-12 2012-09-11 Gamo Outdoor, S.L. Air or fire rifle with noise dampener
US20100058922A1 (en) * 2007-01-12 2010-03-11 Industrias El Gamo Sa Air or fire rifle with noise dampener
US9109851B2 (en) * 2007-01-12 2015-08-18 Gamo Outdoor S.L. Process of manufacturing a rifle to have an integral sound suppressor
CN102529131A (en) * 2010-12-28 2012-07-04 北京新风机械厂 Manufacture method of launch tube
US9261316B2 (en) * 2012-01-13 2016-02-16 Gamo Outdoor, S.L. Method for the manufacture of a barrel for compressed air or CO2 rifles and barrel for compressed air or CO2 rifles obtained
US20150000645A1 (en) * 2012-01-13 2015-01-01 Gamo Outdoors, S.L. Method for the manufacture of a barrel for compressed air or co2 rifles and barrel for compressed air or co2 rifles obtained
US9835400B2 (en) 2014-12-26 2017-12-05 Sturm, Ruger & Company, Inc. Integrally suppressed barrel for firearm
US9857137B2 (en) 2014-12-26 2018-01-02 Sturm, Ruger & Company Silencer for firearm
US10401112B2 (en) 2014-12-26 2019-09-03 Sturm, Ruger & Company, Inc. Silencer for firearm
US10480888B2 (en) 2014-12-26 2019-11-19 Sturm, Ruger & Company, Inc. Silencer for firearm
US11385013B2 (en) 2016-07-01 2022-07-12 Blackpowder Products, Inc. Hybrid carbon—steel firearm barrel
US11732988B2 (en) 2016-07-01 2023-08-22 Blackpowder Products, Inc. Hybrid carbon—steel firearm barrel
US9933224B2 (en) 2016-08-03 2018-04-03 Robert Lindsey Dorne Modular gun silencer
USD1018757S1 (en) 2020-09-17 2024-03-19 Blackpowder Products, Inc. Firearm barrel

Similar Documents

Publication Publication Date Title
US20080251060A1 (en) Carbon/aluminum paintball barrel with built in silencer
US7608002B2 (en) Composite arrow shaft including two-part reinforcing sleeve, method of making same, and front-loaded arrow which is produced therewith
ES2285836T3 (en) SMALL CALIBER GUN GUN.
US6758004B2 (en) Firearm barrel manufacturing methods and barrel assemblies
US7775200B2 (en) Barrel system for a paintball marker
US9140519B2 (en) Light weight stiffened gun stock
US4385544A (en) Drumstick and method of manufacture
RU2017113762A (en) ELECTROSTATIC POWDER COVERED STRINGS
US10907942B2 (en) Shafts with reinforcing layer for sporting goods and methods of manufacture
NO20080643L (en) Apparatus and method of manufacturing elongated elements said as rudder
NO20012553L (en) Components made by filament winding, method of making them, and use thereof
US8834658B2 (en) Wide-body arrow having tapered tail
US9194671B1 (en) Carbon fiber sheet, arrow shaft, and arrow
US20160339632A1 (en) Manufacturing method of tank and tank manufacturing apparatus
US6554725B1 (en) Weight-forward composite arrow shaft
US3965883A (en) Archery bow
CN108591322A (en) A kind of automotive composite material helical spring and preparation method thereof
WO2001002789A3 (en) Composite tube for gun barrel
US20070281794A1 (en) Hollow graphite billiard cue with cross bracing and internal tip, and method of manufacture
JP2008093944A (en) Method for manufacturing tubular body made of fiber-reinforced resin
US20080292822A1 (en) Thin-walled composite sleeve
ATE518086T1 (en) PIPE UNIT COMPRISING AT LEAST TWO PIPES
US20140094331A1 (en) Carbon fiber athletic equipment
EP1696530B1 (en) Impact resistant conduit
US6475583B1 (en) Structure of tubular product of fiber composite material

Legal Events

Date Code Title Description
STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION