US174608A - Improvement in apparatus for bending pipes or tubes - Google Patents
Improvement in apparatus for bending pipes or tubes Download PDFInfo
- Publication number
- US174608A US174608A US174608DA US174608A US 174608 A US174608 A US 174608A US 174608D A US174608D A US 174608DA US 174608 A US174608 A US 174608A
- Authority
- US
- United States
- Prior art keywords
- pipe
- plates
- tubes
- wedges
- improvement
- 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
Links
- 238000005452 bending Methods 0.000 title description 12
- 239000002184 metal Substances 0.000 description 10
- 239000011111 cardboard Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000000123 paper Substances 0.000 description 8
- 240000002027 Ficus elastica Species 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229920001195 polyisoprene Polymers 0.000 description 4
- 239000002965 rope Substances 0.000 description 4
- 210000003414 Extremities Anatomy 0.000 description 2
- 239000007990 PIPES buffer Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
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
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/01—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length
- B21D9/03—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length and built-up from loose elements, e.g. series of balls
Definitions
- Figure 1 represents, in perspective, one of the wedges formed of flat plates of different lengths inclosed in a bent spring-plate, to be used to press the packing against the inner walls of the pipe.
- Fig. 2 represents, in perspective, a piece of square pipe partially in section, showing the packing formed of a series of thin flat plates, placed lengthwise within the pipe, and the wedges used to retain it in position.
- FIG. 3 represents, in side view, a piece of round pipe partially in section, so as to exhibit the transverse plates or half-disks that fill the interior of the pipe.
- Fig. 4 represents the same in longitudinal and in transverse section.
- Fig. 5 represents, in perspective, series of plates, to be used in bending square pipes.
- the object of my invention is to completely support the pipe in its interior, so that while being bent it shall retain its original sectional form; and my invention relates to a packing composed of thin spring-plates of metal, paper card-board, or other suitable flexible material, held firmly in a longitudinal position within the pipe that is to be bent by wedges, formed also 'of thin spring-plates of different lengths.
- My invention relates, also,
- P represents a wedge formed of thin fiat plates of spring-metal, paper card-board, or other suitable material out in different lengths, connected together by rivets or screws p, and inclosed in a thin plate folded over so as to remove the inequalities or steps produced by the different lengths of the thin plates forming the wedge.
- This wedge P is used to force the internal packing against the Walls of the pipe and support them While it is bent.
- This packing as shown in Fig. 2, is formed of a series of thin flat spring-plates, N, of metal, paper cardboard, or other suitable material, united by rivets or screws n.
- Fig. 5 a series of the transverse plates R modified in form, so as to be suitable for bending square pipes, each plate being divided into two parts, so as to admit of the introduction of wedges between each series to force them against the walls of the pipe, and it is evident that a suitable mandrel can be formed in the same manner, to suit any form of pipe, by having the transverse plates similar to the cross-section of the pipe.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Buffer Packaging (AREA)
Description
by 5.51. "La/ham N.PETERS, PHOTO-LITHOGRAFHER, WASHINGTON. D. C.
Patented March 7, 1876.
JIzWe/Z Z2 21 WWW UNITED STATES PATENT OFFIG.
ROBERT WRIGHT, OF PHILADELPHIA, PENNSYLVANIA.
IMPROVEMENT lN APPARATUS FOR BENDING PIPES OR TUBES.
Specification forming part of Letters Patent No- 174,608, dated March 7, 1876; application filed l February 17, 1876.
To all whom it may concern:
Be it known that I, ROBERT WRIGHT, of the city of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Bending Metallic Pipes or Tubes; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which Figure 1 represents, in perspective, one of the wedges formed of flat plates of different lengths inclosed in a bent spring-plate, to be used to press the packing against the inner walls of the pipe. Fig. 2 represents, in perspective, a piece of square pipe partially in section, showing the packing formed of a series of thin flat plates, placed lengthwise within the pipe, and the wedges used to retain it in position. Fig. 3 represents, in side view, a piece of round pipe partially in section, so as to exhibit the transverse plates or half-disks that fill the interior of the pipe. Fig. 4 represents the same in longitudinal and in transverse section. Fig. 5 represents, in perspective, series of plates, to be used in bending square pipes.
In bending gas and other pipes, the metal on the inner curve is ordinarily compressed, and liable to crimp or bend, and thus reduce the original sectional area of the pipe. The object of my invention is to completely support the pipe in its interior, so that while being bent it shall retain its original sectional form; and my invention relates to a packing composed of thin spring-plates of metal, paper card-board, or other suitable flexible material, held firmly in a longitudinal position within the pipe that is to be bent by wedges, formed also 'of thin spring-plates of different lengths. ,My invention relates, also,
to the combination of series of plates or halfdisks and india-rubber washers, strung alternately upon Wire ropes; with wedges formed of thin spring-plates, by means of which they can be forced against the walls of the pipe, and support it completely while being bent.
In the drawings, P represents a wedge formed of thin fiat plates of spring-metal, paper card-board, or other suitable material out in different lengths, connected together by rivets or screws p, and inclosed in a thin plate folded over so as to remove the inequalities or steps produced by the different lengths of the thin plates forming the wedge. This wedge P is used to force the internal packing against the Walls of the pipe and support them While it is bent. This packing, as shown in Fig. 2, is formed of a series of thin flat spring-plates, N, of metal, paper cardboard, or other suitable material, united by rivets or screws n. It is forced against one of the walls of the square pipe M by two wedges, P P, formed as above described, and introduced within the pipe in opposite directions, so as to equalize the pressure in the whole length of the pipe where a support is needed. Wh-n a round pipe is to be bent, I prefer to use, in connection with a wedge or wedges, P, series of transverse plates or half-disks R, of metal, paper card-board, or other suitable material, as shown in Figs. 3 and 4.. These plates or half-disks are strung upon wire ropes q, havinga nut, s, at each extremity to retain them in position, and between each plate there is an elastic washer, r, of indiarubber, or other elastic substance, to allow the mandrel formed of the plates R to assume the requisite curve. Each plate It represents the half of a disk, and the two series of plates are forced apart by the wedge or wedges P, and support the pipe while it is bent.
In Fig. 5 is shown a series of the transverse plates R modified in form, so as to be suitable for bending square pipes, each plate being divided into two parts, so as to admit of the introduction of wedges between each series to force them against the walls of the pipe, and it is evident that a suitable mandrel can be formed in the same manner, to suit any form of pipe, by having the transverse plates similar to the cross-section of the pipe.
Having thus fully described my invention,
What I claim is In combination with a sectional metallic packing made elastic, and adapted to fit the interior of the walls of the pipe or tube to be bent, the wedges P, substantially as and for the purpose described.
Publications (1)
Publication Number | Publication Date |
---|---|
US174608A true US174608A (en) | 1876-03-07 |
Family
ID=2244015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US174608D Expired - Lifetime US174608A (en) | Improvement in apparatus for bending pipes or tubes |
Country Status (1)
Country | Link |
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US (1) | US174608A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2897872A (en) * | 1956-06-13 | 1959-08-04 | Huet Andre | Methods and apparatus for bending tubes |
US2975820A (en) * | 1956-07-03 | 1961-03-21 | Huet Andre | Device for bending tubes |
US3014518A (en) * | 1958-12-29 | 1961-12-26 | Crutcher Rolfs Cummings Inc | Pipe bending machine |
US3016081A (en) * | 1957-12-02 | 1962-01-09 | Generai Electric Company Ltd | Waveguides and methods of bending waveguides |
US4352285A (en) * | 1979-09-06 | 1982-10-05 | Crutcher Resources Corporation | Hydraulic wedge mandrel |
US4757702A (en) * | 1985-07-26 | 1988-07-19 | M.A.N. Roland Druckmaschinen Aktiengesellschaft | Bending and twisting apparatus and method for printing machine threading tube |
US6279369B1 (en) * | 1998-12-14 | 2001-08-28 | Honda Giken Kogyo Kubushiki Kaisha | Pipe bending method and mandrel assembly for carrying out the method |
-
0
- US US174608D patent/US174608A/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2897872A (en) * | 1956-06-13 | 1959-08-04 | Huet Andre | Methods and apparatus for bending tubes |
US2975820A (en) * | 1956-07-03 | 1961-03-21 | Huet Andre | Device for bending tubes |
US3016081A (en) * | 1957-12-02 | 1962-01-09 | Generai Electric Company Ltd | Waveguides and methods of bending waveguides |
US3014518A (en) * | 1958-12-29 | 1961-12-26 | Crutcher Rolfs Cummings Inc | Pipe bending machine |
US4352285A (en) * | 1979-09-06 | 1982-10-05 | Crutcher Resources Corporation | Hydraulic wedge mandrel |
US4757702A (en) * | 1985-07-26 | 1988-07-19 | M.A.N. Roland Druckmaschinen Aktiengesellschaft | Bending and twisting apparatus and method for printing machine threading tube |
US6279369B1 (en) * | 1998-12-14 | 2001-08-28 | Honda Giken Kogyo Kubushiki Kaisha | Pipe bending method and mandrel assembly for carrying out the method |
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