| (19) |
 |
|
(11) |
EP 1 416 164 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
06.04.2005 Bulletin 2005/14 |
| (43) |
Date of publication A2: |
|
06.05.2004 Bulletin 2004/19 |
| (22) |
Date of filing: 22.10.2003 |
|
| (51) |
International Patent Classification (IPC)7: F04D 29/32 |
|
| (84) |
Designated Contracting States: |
|
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
Designated Extension States: |
|
AL LT LV MK |
| (30) |
Priority: |
04.11.2002 US 287209
|
| (71) |
Applicant: BorgWarner Inc. |
|
Auburn Hills, MI 48326-1782 (US) |
|
| (72) |
Inventor: |
|
- Malott, Theodore A.
Jackson Michigan 49203 (US)
|
| (74) |
Representative: Lerwill, John et al |
|
A.A. Thornton & Co. 235 High Holborn
London, WC1V 7LE
London, WC1V 7LE (GB) |
|
| |
|
| (54) |
Two-piece molded fan |
(57) A two-piece molded fan assembly is produced having overlapping fan blades using an
axial draw technique. The two halves are then removed from the mold and coupled together
to form the two-piece fan. By molding the fan as two pieces, a fan blade can be produced
that wraps around the outside of the housing and overlaps with each other in a quick
and easy manner using a simple mold design. The two pieces are formed such that the
a portion of each overlapping blade is formed on both halves of the assembly so that
the die casting tool can be removed along a central axis defining the fan assembly
without contacting the respective portion of the fan blades, therein greatly simplifying
the manufacturing techniques.