US2196708A - Reinforced thin wall tubing - Google Patents
Reinforced thin wall tubing Download PDFInfo
- Publication number
- US2196708A US2196708A US107571A US10757136A US2196708A US 2196708 A US2196708 A US 2196708A US 107571 A US107571 A US 107571A US 10757136 A US10757136 A US 10757136A US 2196708 A US2196708 A US 2196708A
- Authority
- US
- United States
- Prior art keywords
- tubing
- portions
- sheet
- marginal portions
- wall
- 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.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/17—Rigid pipes obtained by bending a sheet longitudinally and connecting the edges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
- F16L9/04—Reinforced pipes
-
- 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
- Y10T29/49481—Wheel making
- Y10T29/49488—Steering wheel
-
- 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
- Y10T74/00—Machine element or mechanism
- Y10T74/20—Control lever and linkage systems
- Y10T74/20576—Elements
- Y10T74/20732—Handles
- Y10T74/20834—Hand wheels
Definitions
- Another object is to provide a continuous method of forming internally reinforced tubing of fiat strip stock.
- a more specificobject is to form tubing of substantially circular cross-section with integral, internal radial reinforcing means.
- Fig. 1 is a plan view of a steering wheel rim and spokes formed with the tubing of the present invention
- Fig. 2 is an enlarged perspective view of a length of tubing embodying the principles of the present invention
- Fig. 3 is a sheet of metal illustrating the manner of preparing the same for folding the same to form the tube;
- Figs. 4 and 5 are end elevations of the sheet of tubing illustrating successive stages of the folding operation
- Fig. 6 is an enlarged fragmentary view of a length of the tubing, part of the circumferential wall being removed for clearness in illustration;
- Fig. 7 is an elevation of a portion of the tubing spirally formed for forming steering wheel rims;
- Fig. 8 is a perspectiveview of a finished rim.
- the tubing comprises a sheet of relatively thin metal I having its marginal portions preformed, so that, upon folding, the main body of the material is rolled to tubular shape with the margins disposed interiorly and defining radial reinforcing spokes 2, 3, 4' and 5, respectively.
- the metal sheet I is passed through successive sets of 4 forming rolls by which it is first folded along its lateral margins to provide the spoke portions 2 and 5, each equal substantially to the radius of the finished tubing. These portions are disposed'at substantially 120 to the plane of the sheet. Next, the portions 3 and 4 lying between the margin portions 2 and 5 and the central portion of the sheet are folded substantially 90 to the plane of the sheet in the same direction as the margins 2 and 5. The portions 3 and 4 are likewise each equal in length to the radius I of the finished tubing.
- the central portion of the sheet of material is warped centrally along a gradual curve, as indicated at 6, and toward the lateral limits is reversely warped to provide reversely curved portions 1 and 8, which merge with the curved portion 6.
- the portions 1 and 8 are substantially the same radius as the finished tubing.
- the sheet With the sheet in this condition, it is next folded in a direction opposite to the curve of the curved portion 6, as indicated bythe arrows 9 in Fig. 5, so as to dispose the curved portions 6, 1 and 8 in enclosing relation to the spoke portions 2, 3, 4 and 5.
- the curvature of the central curved portion 6 is such that upon folding the sheet to form the finished tubing, the curvature of the portion 6 will be reversed and conform to and provide a continuation of the portions 1 and 8.
- the initially outer faces of the portions 3 and 4 are juxtaposed, as illustrated in Fig. 2, and in dotted lines in Fig. 5, thus defining a single, double-thickness spoke spaced 120 from the spokes 2 and 5.
- the tubing is preferably formed by the forming rolls with sufiicient stress to set it with a radius slightly under the final radius so that the internal stresses of the metal resiliently force and hold the spokes 3 and 4 firmly in juxtaposition to provide a substantiallyclosed joint.
- tubing is to be used for spokes, or without axial warpage, no other operation thereon is necessary.
- the tubing is to be warped axially to form a steering wheel rim annulus, it is preferably warped with the dual spoke portions 3 and 4 lying in a plane defined by the tubing axis after warpage, and extending from the axis of the tubing toward the center of curvature.
- spoke portions 2 and 5 extend in a direction away from the center of curvature beyond the axis of the tubing and therefore must necessarily elongate or yield slightly during the warping operation to compensate for the increase in circumference resulting at their outer limits relative to the circumference at the center of the tubing.
- the sheet is preformed with a series of slits Hi, the slits l being spaced longitudinally along the margins of the sheet and extending transversely of the marginal portions defining the spokes. Each slit extends from the outer margin of the sheet I entirely to the inner margin of the associated spoke portion 3 or 4, as the case may be.
- the tubing is to be used for steering wheel rims and the like, it is preferably shaped by the formingrolls into a continuous spiral tubing of comparatively flat convolutions or pitch after the folding operation.
- each complete convolution of the coil is severed by a. suitable metal cut-off, thus separating the coil into a plurality of complete, but separate, spiral loops, such as illustrated in Fig. '7.
- the ends of p the loop are sprung together and butt welded,
- a length of tubing having a curved axis comprising a single strip of sheet metal providing a tubular wall, the strip having marginal portions extending radially from the wall interiorly of the tubing, the marginal portions being split at intervals from the outer edges, the outermost portions of the marginal portions being angularly disposed with respect to .the remainder of the marginal portions and. abutting the interior of the tubular wall at their edges.
- a circular ring of reinforced tubing comprising a single strip of sheet metal providing a tubular wall, the strip having marginal portions directed substantially radially from the wall interiorly of the tubing, and juxtaposed in face to face relation, the outermost sections of the marginal portions being angularly disposed with respect'to each other and abutting the interior of the tubular wall at their edges, said marginal portions being split at regular intervals to facilitate bending the tubing in a plane defined by the juxtaposed marginal portions.
- An annular reinforced tubular ring comprising a single strip of sheet metal having atubular wall of uniform circular cross section, said strip having marginal portions folded radially inwardly from the tubular wall to the central axis thereof, the innermost section of each of the marginal portions being juxtaposed in face-to-face relation with each other from the tubular wall to the central axis, the outermost sections of said marginal portions extending beyond said central axis and being angularly and equally disposed with respect to each other and to the said innermost sections, the said marginal portions being split at regular intervals to facilitate the bending operation of the tubing in a plane defined by the said innermost sections of the marginal portions.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Steering Controls (AREA)
Description
April 9, 1940. r J 5 RE) REINFORCED THIN WALL TUBING Filed 001;. 26, 1936 fig] I NVENTOR 6 v BY- 4 JAMrgJ REID I ATTORNEY.
Patented Apr. 9, 1940 UNITED STATES PATENT OFFICE REINFORCED THIN WALL TUBING James S. Reid, \Shaker Heights, Ohio, assignor,
by mesne assignments, to The Standard Products Company, tion of Ohio Port Clinton, Ohio, a corpora- Application October 26, 1936, Serial No. 107,571
4 Claims.
tion which may be bent into an annulus without buckling or wrinkling of the outer surface.
Another object is to provide a continuous method of forming internally reinforced tubing of fiat strip stock.
A more specificobject is to form tubing of substantially circular cross-section with integral, internal radial reinforcing means.
Other objects and advantages will become apparent from the following specification wherein reference is made to the drawing, in which:
Fig. 1 is a plan view of a steering wheel rim and spokes formed with the tubing of the present invention;
Fig. 2 is an enlarged perspective view of a length of tubing embodying the principles of the present invention;
Fig. 3 is a sheet of metal illustrating the manner of preparing the same for folding the same to form the tube;
Figs. 4 and 5 are end elevations of the sheet of tubing illustrating successive stages of the folding operation;
Fig. 6 is an enlarged fragmentary view of a length of the tubing, part of the circumferential wall being removed for clearness in illustration; Fig. 7 is an elevation of a portion of the tubing spirally formed for forming steering wheel rims; and
Fig. 8 is a perspectiveview of a finished rim. Referring to Fig. 2, the tubing comprises a sheet of relatively thin metal I having its marginal portions preformed, so that, upon folding, the main body of the material is rolled to tubular shape with the margins disposed interiorly and defining radial reinforcing spokes 2, 3, 4' and 5, respectively.
For eifecting this folding operation, the metal sheet I is passed through successive sets of 4 forming rolls by which it is first folded along its lateral margins to provide the spoke portions 2 and 5, each equal substantially to the radius of the finished tubing. These portions are disposed'at substantially 120 to the plane of the sheet. Next, the portions 3 and 4 lying between the margin portions 2 and 5 and the central portion of the sheet are folded substantially 90 to the plane of the sheet in the same direction as the margins 2 and 5. The portions 3 and 4 are likewise each equal in length to the radius I of the finished tubing.
, Substantially concurrently with the folding of the portions 3 and 4 to the 90 position, the central portion of the sheet of material is warped centrally along a gradual curve, as indicated at 6, and toward the lateral limits is reversely warped to provide reversely curved portions 1 and 8, which merge with the curved portion 6. The portions 1 and 8 are substantially the same radius as the finished tubing.
With the sheet in this condition, it is next folded in a direction opposite to the curve of the curved portion 6, as indicated bythe arrows 9 in Fig. 5, so as to dispose the curved portions 6, 1 and 8 in enclosing relation to the spoke portions 2, 3, 4 and 5. The curvature of the central curved portion 6 is such that upon folding the sheet to form the finished tubing, the curvature of the portion 6 will be reversed and conform to and provide a continuation of the portions 1 and 8. During this folding action, the initially outer faces of the portions 3 and 4 are juxtaposed, as illustrated in Fig. 2, and in dotted lines in Fig. 5, thus defining a single, double-thickness spoke spaced 120 from the spokes 2 and 5.
Since all portions 2, 3, 4 and 5 are equal in width tothe radius of the finished tubing, the spokes 2 and 5 firmly abut the inner wall surface of the finished tubing.
The tubing is preferably formed by the forming rolls with sufiicient stress to set it with a radius slightly under the final radius so that the internal stresses of the metal resiliently force and hold the spokes 3 and 4 firmly in juxtaposition to provide a substantiallyclosed joint.
If the tubing is to be used for spokes, or without axial warpage, no other operation thereon is necessary. If the tubing is to be warped axially to form a steering wheel rim annulus, it is preferably warped with the dual spoke portions 3 and 4 lying in a plane defined by the tubing axis after warpage, and extending from the axis of the tubing toward the center of curvature. such a formation of the tubing, spoke portions 2 and 5 extend in a direction away from the center of curvature beyond the axis of the tubing and therefore must necessarily elongate or yield slightly during the warping operation to compensate for the increase in circumference resulting at their outer limits relative to the circumference at the center of the tubing.
Since the dual spoke portion cannot be contracted, and cannot expand at its juncture with the tubing wall, but only at its juncture with the spoke portions 2 and 5, the warpage must occur by expansion outwardly from the juncture of the dual spoke portions 3 and 4'with the tubing wall. To provide for this expansion, the sheet is preformed with a series of slits Hi, the slits l being spaced longitudinally along the margins of the sheet and extending transversely of the marginal portions defining the spokes. Each slit extends from the outer margin of the sheet I entirely to the inner margin of the associated spoke portion 3 or 4, as the case may be.
If the tubing is to be used for steering wheel rims and the like, it is preferably shaped by the formingrolls into a continuous spiral tubing of comparatively flat convolutions or pitch after the folding operation. For forming therims from such structure, each complete convolution of the coil is severed by a. suitable metal cut-off, thus separating the coil into a plurality of complete, but separate, spiral loops, such as illustrated in Fig. '7. To form the rim therefrom, the ends of p the loop are sprung together and butt welded,
thus providing a continuous rim. In forming the tube from the flat stock, obviously it may be continuously fed through the forming mechanism from suitable coils of 'flat strip so that the process is continuous.
Having thus described my invention, what I claim is:
1. A length of tubing having a curved axis comprising a single strip of sheet metal providing a tubular wall, the strip having marginal portions extending radially from the wall interiorly of the tubing, the marginal portions being split at intervals from the outer edges, the outermost portions of the marginal portions being angularly disposed with respect to .the remainder of the marginal portions and. abutting the interior of the tubular wall at their edges.
2. A length of tubing bent in the form of an annulus and comprising a single strip of sheet metal providing a tubular wall, said strip having marginal portions extending radially from the wall interiorly of the tubing, the width of each of said portions being substantially twice the radius of the tubular wall, said marginal portions being split at regular intervals from the outer edges to facilitate the bending operation, the outermost half of said marginal portions being angularly disposed with respect to the remainder of the marginal portions and abutting and supporting at equally and circumferentially spaced zones the interior of the tubular wall at their edges.
3. A circular ring of reinforced tubing comprising a single strip of sheet metal providing a tubular wall, the strip having marginal portions directed substantially radially from the wall interiorly of the tubing, and juxtaposed in face to face relation, the outermost sections of the marginal portions being angularly disposed with respect'to each other and abutting the interior of the tubular wall at their edges, said marginal portions being split at regular intervals to facilitate bending the tubing in a plane defined by the juxtaposed marginal portions.
4. An annular reinforced tubular ring comprising a single strip of sheet metal having atubular wall of uniform circular cross section, said strip having marginal portions folded radially inwardly from the tubular wall to the central axis thereof, the innermost section of each of the marginal portions being juxtaposed in face-to-face relation with each other from the tubular wall to the central axis, the outermost sections of said marginal portions extending beyond said central axis and being angularly and equally disposed with respect to each other and to the said innermost sections, the said marginal portions being split at regular intervals to facilitate the bending operation of the tubing in a plane defined by the said innermost sections of the marginal portions.
JAMES S. RED).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US107571A US2196708A (en) | 1936-10-26 | 1936-10-26 | Reinforced thin wall tubing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US107571A US2196708A (en) | 1936-10-26 | 1936-10-26 | Reinforced thin wall tubing |
Publications (1)
Publication Number | Publication Date |
---|---|
US2196708A true US2196708A (en) | 1940-04-09 |
Family
ID=22317263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US107571A Expired - Lifetime US2196708A (en) | 1936-10-26 | 1936-10-26 | Reinforced thin wall tubing |
Country Status (1)
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US (1) | US2196708A (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2506434A1 (en) * | 1974-02-21 | 1975-08-28 | Graenges Essem Ab | METHOD FOR MANUFACTURING FLAT HEAT EXCHANGER TUBES |
US4016727A (en) * | 1974-03-18 | 1977-04-12 | Fukuvi Chemical Industry Co., Ltd. | Drain trough member and its connector |
US4251907A (en) * | 1977-07-08 | 1981-02-24 | Bleckmann Richard | Method for the manufacture of thin-walled metal tubes |
US4286636A (en) * | 1979-07-19 | 1981-09-01 | The Coca-Cola Company | Dip tube and valve with quick-disconnect coupling for a collapsible container |
US4543008A (en) * | 1982-10-29 | 1985-09-24 | Conoco Inc. | Stiffening for complex tubular joints |
US4650367A (en) * | 1983-11-30 | 1987-03-17 | Dietzler Daniel P | Internally reinforced extruded plastic pipe |
US20030089737A1 (en) * | 2001-11-09 | 2003-05-15 | Michael Wilford | Flexible plastic container |
US20030127178A1 (en) * | 2002-01-08 | 2003-07-10 | Brent Anderson | Method for texturing a film |
US20030136798A1 (en) * | 2001-11-09 | 2003-07-24 | Michael Wilford | Flexible plastic container |
US20050242114A1 (en) * | 1999-11-10 | 2005-11-03 | Chester Savage | Collapsible bag for dispensing liquids and method |
US20060070486A1 (en) * | 2004-09-24 | 2006-04-06 | Xiaoping Xu | Extruded steering wheel rim |
US20060131328A1 (en) * | 2004-12-22 | 2006-06-22 | Brent Anderson | One way valve and container |
US20070025648A1 (en) * | 2005-07-27 | 2007-02-01 | Kenneth Micnerski | Collapsible bag for dispensing liquids and method |
US20070217718A1 (en) * | 2006-03-14 | 2007-09-20 | Kenneth Micnerski | Collapsible bag for dispensing liquids and method |
US20080226452A1 (en) * | 2007-03-14 | 2008-09-18 | Weaver William C | Modular fan housing |
US20140360097A1 (en) * | 2013-06-06 | 2014-12-11 | Green Channels (International) Limited | Planter box, multipurpose diacolation pipe and method for soil drainage and irrigation |
-
1936
- 1936-10-26 US US107571A patent/US2196708A/en not_active Expired - Lifetime
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2506434A1 (en) * | 1974-02-21 | 1975-08-28 | Graenges Essem Ab | METHOD FOR MANUFACTURING FLAT HEAT EXCHANGER TUBES |
US4024619A (en) * | 1974-02-21 | 1977-05-24 | Granges Essem Aktiebolag | Method of manufacturing a flat heat-exchanger tube from thin, flexible metal strip material |
US4016727A (en) * | 1974-03-18 | 1977-04-12 | Fukuvi Chemical Industry Co., Ltd. | Drain trough member and its connector |
US4251907A (en) * | 1977-07-08 | 1981-02-24 | Bleckmann Richard | Method for the manufacture of thin-walled metal tubes |
US4286636A (en) * | 1979-07-19 | 1981-09-01 | The Coca-Cola Company | Dip tube and valve with quick-disconnect coupling for a collapsible container |
US4543008A (en) * | 1982-10-29 | 1985-09-24 | Conoco Inc. | Stiffening for complex tubular joints |
US4650367A (en) * | 1983-11-30 | 1987-03-17 | Dietzler Daniel P | Internally reinforced extruded plastic pipe |
US7357276B2 (en) | 1999-11-10 | 2008-04-15 | Scholle Corporation | Collapsible bag for dispensing liquids and method |
US20050242114A1 (en) * | 1999-11-10 | 2005-11-03 | Chester Savage | Collapsible bag for dispensing liquids and method |
US6715644B2 (en) | 2001-11-09 | 2004-04-06 | David S. Smith Packaging Limited | Flexible plastic container |
US20030136798A1 (en) * | 2001-11-09 | 2003-07-24 | Michael Wilford | Flexible plastic container |
US20030089737A1 (en) * | 2001-11-09 | 2003-05-15 | Michael Wilford | Flexible plastic container |
US20030127178A1 (en) * | 2002-01-08 | 2003-07-10 | Brent Anderson | Method for texturing a film |
US6984278B2 (en) | 2002-01-08 | 2006-01-10 | Cti Industries, Corporation | Method for texturing a film |
US20060070486A1 (en) * | 2004-09-24 | 2006-04-06 | Xiaoping Xu | Extruded steering wheel rim |
US7972064B2 (en) | 2004-12-22 | 2011-07-05 | Cti Industries Corporation | One way valve and container |
US20060131328A1 (en) * | 2004-12-22 | 2006-06-22 | Brent Anderson | One way valve and container |
US20070025648A1 (en) * | 2005-07-27 | 2007-02-01 | Kenneth Micnerski | Collapsible bag for dispensing liquids and method |
US20070217718A1 (en) * | 2006-03-14 | 2007-09-20 | Kenneth Micnerski | Collapsible bag for dispensing liquids and method |
US7828522B2 (en) | 2007-03-14 | 2010-11-09 | Thomas F. Noonan | Modular fan housing |
US20080226452A1 (en) * | 2007-03-14 | 2008-09-18 | Weaver William C | Modular fan housing |
US20140360097A1 (en) * | 2013-06-06 | 2014-12-11 | Green Channels (International) Limited | Planter box, multipurpose diacolation pipe and method for soil drainage and irrigation |
US9974248B2 (en) * | 2013-06-06 | 2018-05-22 | Green Channels (International) Limited | Planter box, multipurpose diacolation pipe and method for soil drainage and irrigation |
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