Metal working – Method of mechanical manufacture – Heat exchanger or boiler making
Reexamination Certificate
2005-07-05
2005-07-05
Cuda Rosenbaum, I (Department: 3726)
Metal working
Method of mechanical manufacture
Heat exchanger or boiler making
C029S890036, C029S890037
Reexamination Certificate
active
06912785
ABSTRACT:
A notebook computer has a base housing with a heat-generating microprocessor therein, and a lid housing pivotally connected to the base housing. Operating heat from the microprocessor is transferred to the lid housing, for dissipation therefrom, via a specially designed thermosyphoning heat pipe structure formed from first and second heat pipes. The first heat pipe representatively has a rectangular cross-section, an evaporating portion thermally communicated with the microprocessor, and a coiled condensing portion centered about the lid hinge line and having a circularly cross-sectioned interior side surface portion defined by flat sides of the first heat pipe. The second heat pipe has a circular cross-section, an evaporating portion pivotally received within the coiled first heat pipe portion, and a condensing portion thermally communicated with the lid housing. When the lid housing is opened and closed, the evaporating portion of the second heat pipe is rotated within the coiled first heat pipe portion and slidably engages its circularly cross-sectioned interior side portion.
REFERENCES:
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patent: 5588483 (1996-12-01), Ishida
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patent: 5781409 (1998-07-01), Mecredy, III
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Cuda Rosenbaum I
Hewlett--Packard Development Company, L.P.
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