Pipes and tubular conduits – Structure
Reexamination Certificate
2006-01-10
2006-01-10
Brinson, Patrick (Department: 3754)
Pipes and tubular conduits
Structure
C138S156000, C138S151000, C072S368000, C072S051000
Reexamination Certificate
active
06983770
ABSTRACT:
A method of manufacturing pipe body by which pipe body with precise quality and closely contacted seam can be made stably by pressing process, and pipe body manufactured by the method are provided. To manufacture a pipe body1made of metal with circular or polygonal cross section comprising a seam5eand a wall2or plurality of walls2, 3and4,a pipe-like intermediate product14is made by bending a metal plate6of which edges to be seam5ehave not yet contacted together. In case for prism pipe, the intermediate product comprises walls5a,5bto be contacted and be a wall including seam, and other walls, and both angles of both ends of one specified wall15of the intermediate product are larger than those of completed pipe. External forces are applied to adjoining walls16, 16of the one specified wall15so as for the one specified wall15to include convex portion32to outer side and for the seam5eto be closely contacted together, then another external force is applied to the one specified wall15so as to be flat and to be the completed pipe1.A spring back force tending the one specified wall to be back as original convex form is induced and it maintains the seam5ein dose contacted condition. In case for cylindrical pipe, the intermediate product has an oval cross section with its seam contacted together, and an external force is applied in long axis direction of the oval so as for the oval to be circular and to be a completed pipe1.A spring back force tends the pipe to be back as original oval form is induced and it maintains the seam5ein close contacted condition.
REFERENCES:
patent: 786923 (1905-04-01), Smith
patent: 1019485 (1912-03-01), Koenig
patent: 1344105 (1920-06-01), Vance
patent: 1894054 (1933-01-01), Noble
patent: 1897077 (1933-02-01), Shuttleworth
patent: 2115441 (1938-04-01), Black
patent: 3881520 (1975-05-01), Murphy
patent: 4135633 (1979-01-01), Lockwood et al.
patent: 4310740 (1982-01-01), Nakazima
patent: 5239888 (1993-08-01), Sevault et al.
patent: 6000461 (1999-12-01), Ross et al.
patent: 6745448 (2004-06-01), Kondou et al.
patent: 4420070 (1995-02-01), None
patent: 0395626 (1990-10-01), None
patent: 1378692 (1964-11-01), None
patent: 01-162522 (1989-06-01), None
patent: 1162522 (1989-06-01), None
patent: 11290940 (1999-10-01), None
patent: 9007392 (1990-07-01), None
WIPO 9007392 Jul. 1990.
European Search Report in appln. No. 01300945.1-2302-(search report dated Mar. 6, 2002).
Translation of summary of Japanese patent publn. 01-162522 (Nakao; of record).
Ishino Keiji
Kondou Takafumi
Brinson Patrick
Cooper & Dunham LLP
Ricoh & Company, Ltd.
LandOfFree
Method of manufacturing pipe body and pipe body manufactured... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of manufacturing pipe body and pipe body manufactured..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of manufacturing pipe body and pipe body manufactured... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3541647