Continuous extrusion apparatus

Metal deforming – By extruding through orifice – By rotating impeller means

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

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.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Continuous extrusion apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Continuous extrusion apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous extrusion apparatus will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4259546

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.