US5329425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling system
Assignee: Alcatel Lucent NV
•
Filing: 1992-01-30
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Granted: 1994-07-12
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Expires: 2012-01-30
Abstract
Abstract A cooling system for a plurality of circuit boards, each circuit board having a substantially planar thermally conductive thermal sink having longitudinal sides and being in thermal contact with a plurality of electronic components dissipating heat, includes a heat exchanger for delivering heat to a cooling medium and a heat pipe for transferring heat from each thermal sink to the heat exchanger. The heat pipe includes at least one flat box-shaped heat pipe, at least a first part of the heat pipe being in thermal contact with the longitudinal sides of the thermal sinks of the circuit boards.
Inventors
- 👤 Francois J. C. Leyssens
- 👤 Hendrikus M. J. Rombouts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:14
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/20; H05K7/20536; H05K7/20663; H05K7/20672; F; F28; F28D; F28D15/00; F28D15/02; F28D15/0233; F28D15/0275
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
A cooling system for a plurality of circuit boards, each circuit board having a substantially planar thermally conductive thermal sink having longitudinal sides and being in thermal contact with a plurality of electronic components dissipating heat, said cooling system including: a heat exchanger for delivering heat to a cooling medium; and a flat box-shaped heat pipe for transferring heat from thermal sinks to said heat exchanger, at least a first part of said heat pipe for thermally contacting longitudinal sides of thermal sinks of circuit boards; wherein grooves are provided in thermal contact with said flat box-shaped heat pipe, for receiving longitudinal sides of thermal sinks of circuit boards; and wherein said grooves are provided in said box-shaped heat pipe.
Claim 2
Dependent Claim
120 words
A cooling system for a plurality of circuit boards, each circuit board having a substantially planar thermally conductive thermal sink having longitudinal sides and being in thermal contact with a plurality of electronic components dissipating heat, said cooling system including: a heat exchanger for delivering heat to a cooling medium; and a flat box-shaped heat pipe for transferring heat from thermal sinks to said heat exchanger, at least a first part of said heat pipe for thermally contacting longitudinal sides of thermal sinks of circuit boards; wherein grooves are provided in thermal contact with said flat box-shaped heat pipe, for receiving longitudinal sides of thermal sinks of circuit boards; and wherein said grooves are provided in said box-shaped heat pipe.
Claim 3
Dependent Claim
28 words
A cooling system according to claim 1, wherein said flat box-shaped heat pipe has another part substantially perpendicular to said first part and leading to said heat exchanger.
Claim 4
Dependent Claim
33 words
A cooling system according to claim 1, wherein said flat box-shaped heat pipe is disposed to be in thermal contact with longitudinal sides of thermal sinks of two adjacent sets of circuit boards.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-11 | 1998-01-10 | 1998-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-11 | 2002-01-10 | 2002-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-11 | 2006-01-10 | 2006-07-12 | $7700.00 | Window Closed / Lapsed |