Metal deforming – By extruding through orifice – By rotating impeller means
Reexamination Certificate
2010-04-21
2011-11-22
Ross, Dana (Department: 3725)
Metal deforming
By extruding through orifice
By rotating impeller means
C072S269000
Reexamination Certificate
active
08061173
ABSTRACT:
Extrusion mandrel assembly for continuous extrusion apparatus has a lobed, mushroom shaped, dolly formed with a central spacing stem located in the chamber adjacent a pair of discharge ports connecting respective exit apertures into an internal cavity in the chamber and a pair of shaped lobes having rear faces extending from central spacing stem, outer edge portions and front faces merging into a collar around a neck co-acting with an annular shoulder on extrusion die body to form an annular extrusion gap, with each lobe profiled so frictional surface drag on extruding material is uniform around lobed dolly. Individual paths between discharge ports and annular extrusion gap are equal in length as measured on respective surfaces of the rear faces, edge portions and front faces of profiled lobes. An extruded aluminium cylindrical tube up to 150 mm diameter and wall thickness of 1 mm to 4 mm may be formed avoiding discontinuities.
REFERENCES:
patent: 2105083 (1938-01-01), Kagi et al.
patent: 2869220 (1959-01-01), Raydt et al.
patent: 3572074 (1971-03-01), Holdup et al.
patent: 3732717 (1973-05-01), Ahlvers
patent: 3834209 (1974-09-01), Robertson
patent: 3985011 (1976-10-01), Fuchs, Jr.
patent: 4564347 (1986-01-01), Vaughan
patent: 5147085 (1992-09-01), Hawkes et al.
patent: 5152163 (1992-10-01), Hawkes et al.
patent: 5197319 (1993-03-01), Beekel et al.
patent: 5813270 (1998-09-01), Carter
patent: 5829298 (1998-11-01), Linsenbardt et al.
patent: 5836191 (1998-11-01), Wright
patent: 5887473 (1999-03-01), Hawkes
patent: 6619093 (2003-09-01), Dawson et al.
patent: 6655415 (2003-12-01), Dawson et al.
patent: 6988389 (2006-01-01), Hawkes
patent: 7194885 (2007-03-01), Hawkes
patent: 2005/0268682 (2005-12-01), Hawkes
patent: 2006/0156782 (2006-07-01), Hawkes
patent: 2008/0118595 (2008-05-01), Hawkes
patent: 0 071 490 (1982-08-01), None
patent: 0 202 953 (1986-11-01), None
patent: 0 398 747 (1990-11-01), None
patent: WO 2006/043069 (2006-04-01), None
U.S. Appl. No. 12/543,136, filed Mar. 2010, Hawkes.
Written Opinion of the International Searching Authority of PCT/GB2008/003830 dated Feb. 26, 2009, 5 pgs.
International Search Report of PCT/GB2008/003830 dated Feb. 26, 2009, 4 pgs.
Boyer Homer
BWE Limited
Ross Dana
Shlesinger & Arkwright & Garvey LLP
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