Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F1/00—Tubular elements; Assemblies of tubular elements
  • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
  • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
  • F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
  • F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
  • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
  • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
  • B21C37/15—Making tubes of special shape; Making tube fittings
  • B21C37/22—Making finned or ribbed tubes by fixing strip or like material to tubes
  • B21C37/26—Making finned or ribbed tubes by fixing strip or like material to tubes helically-ribbed tubes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31C—MAKING WOUND ARTICLES, e.g. WOUND TUBES, OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31C3/00—Making tubes or pipes by feeding obliquely to the winding mandrel centre line

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Geometry (AREA)
• Thermal Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Lining Or Joining Of Plastics Or The Like (AREA)
• Shaping Of Tube Ends By Bending Or Straightening (AREA)
• Treatment Of Fiber Materials (AREA)
• Winding Of Webs (AREA)
• Electroplating Methods And Accessories (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=5875128

Family Applications (1)

Country Status (24)

Families Citing this family (5)

Family Cites Families (1)

• 1973
  • 1973-03-17 DE DE2313436A patent/DE2313436C3/de not_active Expired
• 1974
  • 1974-02-08 AT AT102574A patent/AT325926B/de not_active IP Right Cessation
  • 1974-02-14 CH CH205974A patent/CH565601A5/xx not_active IP Right Cessation
  • 1974-02-25 ZA ZA00741226A patent/ZA741226B/xx unknown
  • 1974-02-25 GB GB840274A patent/GB1444220A/en not_active Expired
  • 1974-02-26 IL IL44290A patent/IL44290A/xx unknown
  • 1974-02-27 AU AU66068/74A patent/AU474881B2/en not_active Expired
  • 1974-02-28 BG BG025932A patent/BG22372A3/xx unknown
  • 1974-03-12 NL NL7403300.A patent/NL161075B/xx not_active IP Right Cessation
  • 1974-03-13 DD DD177162A patent/DD110185A5/xx unknown
  • 1974-03-13 IT IT12570/74A patent/IT1010678B/it active
  • 1974-03-14 YU YU704/74A patent/YU35515B/xx unknown
  • 1974-03-14 BE BE6044502A patent/BE812346A/xx not_active IP Right Cessation
  • 1974-03-14 CS CS741852A patent/CS189627B2/cs unknown
  • 1974-03-14 PL PL1974169538A patent/PL92544B1/pl unknown
  • 1974-03-15 HU HUBA3049A patent/HU168730B/hu unknown
  • 1974-03-15 SU SU7402005713A patent/SU579862A3/ru active
  • 1974-03-15 FR FR7408906A patent/FR2221195B1/fr not_active Expired
  • 1974-03-15 SE SE7403496A patent/SE408620B/xx unknown
  • 1974-03-15 CA CA195,076A patent/CA997216A/en not_active Expired
  • 1974-03-15 RO RO7478044A patent/RO65482A/ro unknown
  • 1974-03-16 ES ES424368A patent/ES424368A1/es not_active Expired
  • 1974-03-16 JP JP2963374A patent/JPS5333110B2/ja not_active Expired
  • 1974-07-27 IN IN275/CAL/1974A patent/IN140504B/en unknown

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