Pumps – Motor driven – Pump and motor interconnected by endless flexible...
Reexamination Certificate
2005-09-20
2005-09-20
Freay, Charles G. (Department: 3746)
Pumps
Motor driven
Pump and motor interconnected by endless flexible...
C417S423100, C417S423700, C417S423120, C417S423140, C417S354000, C415S220000, C415S229000
Reexamination Certificate
active
06945758
ABSTRACT:
A tubeaxial fan (10) broadly including a cylinder (12), a propeller (14) rotatably supported in the cylinder (12), and a drive assembly (16) operable to rotate the propeller (14) is disclosed. The propeller (14) includes blades (28,30,32,34,36,38) each having an inventive blade design. The inventive blade design presents a chord length (C), a stagger angle (βe), and a camber height (δc) that vary along each of the blades as shown in TABLE 1. The inventive blade design presents an external surface of each of the blades having a shape defined by the relative positioning of a plurality of coordinates contained in at least nine cross-sections (e.g., the blade (28) includes cross-sections (44,46,48,50,52,54,56,58,60)). The cross-sections (44,46,48,50,52,54,56,58,60) of the illustrated blade (28) have the corresponding plurality of coordinates listed in TABLE 2. The drive assembly (16) incorporates an inventive design that presents, among other features, a cover dimension DCof the bearing cover (72) of less than about one-sixth the propeller diameter (δ), and tapering end sections (76a,76b) on the belt cover (76). A preferred alternative embodiment is also disclosed in the fan (210) including support plates (212a,212b) having a plate width (WP) between about one-tenth and one-seventh of the axial length of the cylinder (212).
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Copy of Notice of Allowance in corresponding Application No. 10/093,869 (with copy of claims pending herein).
Copy of Office Action in pending Application No. 10/093,879 (with copy of claims pending therein).
Lievens Ronald J.
Lin Wanlai
Nguyen Tung Kim
Emerson Electric Co.
Freay Charles G.
Gray Michael K.
Hovey & Williams, LLP
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