Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Reexamination Certificate
2006-10-24
2006-10-24
Nguyen, Ninh H. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
C416S09600A, C416S224000, C416S500000
Reexamination Certificate
active
07125225
ABSTRACT:
A rotor blade for a rotor assembly is provided that includes a root, an airfoil, and a damper. The airfoil has a length, a base, a tip, a first side wall, a second side wall, and at least one cavity. The length extends the base and the tip. The at least one cavity is disposed between the side walls, and the channel is defined by a first wall portion and a second wall portion. The damper, which is selectively received within the channel, includes a first bearing surface, a second bearing surface, a forward surface, and an aft surface, all of which extend lengthwise. At least one of the surfaces is shaped to form a lengthwise extending passage within the channel. The passage has a flow direction oriented along the length of the at least one surface to permit cooling air travel along the at least one surface in a lengthwise direction. According to one aspect of the present invention, the damper has an arcuate lengthwise extending centerline.
REFERENCES:
patent: 3610778 (1971-10-01), Suter
patent: 5156528 (1992-10-01), Bobo
patent: 5558497 (1996-09-01), Kraft et al.
patent: 5820343 (1998-10-01), Kraft et al.
Gregg Shawn J.
Otero Edwin
Propheter Tracy A.
Surace Raymond C.
Nguyen Ninh H.
United Technologies Corporation
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