| US 7,509,737 B2 | ||
| Fan blade manufacturing methods | ||
| Jen-Lung David Tai, Glendale, Ariz. (US) | ||
| Assigned to Air Cool Industrial Co. Ltd., Taichung (Taiwan) | ||
| Filed on Mar. 10, 2005, as Appl. No. 11/76,818. | ||
| Prior Publication US 2006/0200987 A1, Sep. 14, 2006 | ||
| Int. Cl. B21K 21/16 (2006.01); B23P 17/00 (2006.01); B21D 53/78 (2006.01); B64C 9/00 (2006.01); B63H 1/26 (2006.01) | ||
| U.S. Cl. 29—889.7 [29/401.1; 29/412; 29/889.6; 416/23; 416/237] | 2 Claims |

| 1. A method of manufacturing a fan blade, comprising steps of:
providing a fan blade blank having a first air movement characteristic defined by a first overall shape of the fan blade blank
characterized by the fan blade blank including:
opposed major faces,
opposed inner and outer extremities, and
opposed first and second sides defining opposed first and second edges, respectively;
cutting the fan blade blank asunder into first and second parts along a cut line extending from the inner extremity of the
fan blade blank to the outer extremity of the fan blade blank inboard of and substantially parallel to one of the first and
second edges forming a first cut edge of one of the first and second parts and a second cut edge of the other of the first
and second parts;
chamfering one of the first and second cut edges forming a chamfered one of the first and second cut edges; and
affixing the chamfered one of the first and second cut edges to the other of the first and second cut edges forming a fan
blade having a second air movement characteristic defined by a second overall shape of the fan blade characterized by the
first part affixed to the second part, the first part being angled relative to the second part comprising an angled part of
the fan blade lacking in the fan blade blank thereby providing the fan blade with the second air movement characteristic greater
than the first air movement characteristic of the fan blade blank defined by the second overall shape of the fan blade different
from the first overall shape of the fan blade blank.
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