EP0086480A3 - Method for the manufacture of front fork of single unit type for bicycles from center butted ferrous tubular material - Google Patents

Method for the manufacture of front fork of single unit type for bicycles from center butted ferrous tubular material Download PDF

Info

Publication number
EP0086480A3
EP0086480A3 EP83101399A EP83101399A EP0086480A3 EP 0086480 A3 EP0086480 A3 EP 0086480A3 EP 83101399 A EP83101399 A EP 83101399A EP 83101399 A EP83101399 A EP 83101399A EP 0086480 A3 EP0086480 A3 EP 0086480A3
Authority
EP
European Patent Office
Prior art keywords
bicycles
butted
manufacture
center
single unit
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.)
Granted
Application number
EP83101399A
Other versions
EP0086480A2 (en
EP0086480B1 (en
Inventor
Isao Kimura
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
Publication of EP0086480A2 publication Critical patent/EP0086480A2/en
Publication of EP0086480A3 publication Critical patent/EP0086480A3/en
Application granted granted Critical
Publication of EP0086480B1 publication Critical patent/EP0086480B1/en
Expired legal-status Critical Current

Links

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
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/005—Processes combined with methods covered by groups B21D1/00 - B21D31/00 characterized by the material of the blank or the workpiece
    • B21D35/006—Blanks having varying thickness, e.g. tailored blanks
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/86—Making other particular articles other parts for bicycles or motorcycles
EP19830101399 1982-02-15 1983-02-14 Method for the manufacture of front fork of single unit type for bicycles from center butted ferrous tubular material Expired EP0086480B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2120082A JPS58138525A (en) 1982-02-15 1982-02-15 Method for manufacturing one body system front fork material from central butted blank pipe
JP21200/82 1982-02-15

Publications (3)

Publication Number Publication Date
EP0086480A2 EP0086480A2 (en) 1983-08-24
EP0086480A3 true EP0086480A3 (en) 1984-03-21
EP0086480B1 EP0086480B1 (en) 1986-09-17

Family

ID=12048327

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830101399 Expired EP0086480B1 (en) 1982-02-15 1983-02-14 Method for the manufacture of front fork of single unit type for bicycles from center butted ferrous tubular material

Country Status (3)

Country Link
EP (1) EP0086480B1 (en)
JP (1) JPS58138525A (en)
DE (1) DE3366171D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4103082A1 (en) * 1991-02-01 1992-08-27 Eichelberg & Co Gmbh H D METHOD FOR THE HYDROSTATIC FORMING OF HOLLOW BODIES FROM COLD FORMABLE METAL AND DEVICE FOR IMPLEMENTING THE METHOD
US9579709B2 (en) * 2015-03-20 2017-02-28 Alex Global Technology, Inc. Method for manufacturing bicycle front fork having wheel clamping base

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE129875C (en) *
FR477835A (en) * 1914-07-01 1915-11-03 Furan Atel Du Manufacturing process of fork heads for cycles and motorcycles
US4051704A (en) * 1975-11-19 1977-10-04 Senkichiro Kimura Method for the manufacture of an ornamental head lug of the single unit type for use in bicycles
DE3021481A1 (en) * 1980-06-05 1981-12-10 Mannesmann AG, 4000 Düsseldorf Thickened wall section tube prodn. - involves dia. reduction against inner core with subsequent widening against outer support
US4305269A (en) * 1979-09-27 1981-12-15 Isao Kimura Oil hydraulic bulge-forming process for the manufacture of front fork blank of single unit type for bicycles

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS517153B2 (en) * 1971-12-06 1976-03-05

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE129875C (en) *
FR477835A (en) * 1914-07-01 1915-11-03 Furan Atel Du Manufacturing process of fork heads for cycles and motorcycles
US4051704A (en) * 1975-11-19 1977-10-04 Senkichiro Kimura Method for the manufacture of an ornamental head lug of the single unit type for use in bicycles
US4305269A (en) * 1979-09-27 1981-12-15 Isao Kimura Oil hydraulic bulge-forming process for the manufacture of front fork blank of single unit type for bicycles
DE3021481A1 (en) * 1980-06-05 1981-12-10 Mannesmann AG, 4000 Düsseldorf Thickened wall section tube prodn. - involves dia. reduction against inner core with subsequent widening against outer support

Also Published As

Publication number Publication date
DE3366171D1 (en) 1986-10-23
EP0086480A2 (en) 1983-08-24
EP0086480B1 (en) 1986-09-17
JPS58138525A (en) 1983-08-17

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