US5441102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger for electronic equipment
Assignee: Sun Microsystems Inc
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Filing: 1994-01-26
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Granted: 1995-08-15
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Expires: 2014-01-26
Abstract
Abstract A heat transfer apparatus is disclosed. The heat transfer apparatus includes a heat pipe containing heat transfer liquid. Disposed in the heat pipe is a centrifugal rotor assembly having fixed magnets on the rotor blades. A magnetic field is generated by a magnetic coil assembly that surrounds the heat pipe. The rotor assembly rotates in response to the magnetic field, agitating the heat transfer liquid. A second embodiment is a liquid heat transfer system that includes a heat absorption chamber, a pump, and a heat exchanger where circulation and cooling of the heat transfer liquid occurs outside of the heat absorption chamber.
Inventors
- 👤 Trevor Burward-Hoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:05
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/40; H10W40/47; F; F28; F28D; F28D1/00; F28D1/02; F28D1/03; F28D1/0308; F28D1/0325; F28D15/00; F28D15/02; F28D15/0266; F28F; F28F13/00; F28F13/06; F28F13/12; F28F13/125; F28F9/00; F28F9/02; F28F9/026; F28F9/0265; F28F9/0268; H10W40/70; H10W40/73; F28D2015/0291; F28D21/00; F28D2021/0019; F28D2021/0028; F28D2021/0031; F28F2250/00; F28F2250/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
68 words
A heat transfer apparatus, comprising: a heat pipe containing a heat transfer liquid; a magnetic coil surrounding the heat pipe, the magnetic coil for producing a magnetic field when an electric current is supplied to the magnetic coil, the magnetic field passing through the heat pipe; and an agitator disposed in the heat pipe, the agitator for agitating the heat transfer liquid in response to the magnetic field.
Claim 2
Dependent Claim
68 words
A heat transfer apparatus, comprising: a heat pipe containing a heat transfer liquid; a magnetic coil surrounding the heat pipe, the magnetic coil for producing a magnetic field when an electric current is supplied to the magnetic coil, the magnetic field passing through the heat pipe; and an agitator disposed in the heat pipe, the agitator for agitating the heat transfer liquid in response to the magnetic field.
Claim 3
Dependent Claim
33 words
The heat transfer apparatus of claim 1, wherein the agitator is a rotor assembly, the rotor assembly including a plurality of rotor blades, a magnet being coupled to at least one rotor blade.
Claim 4
Dependent Claim
27 words
The heat transfer apparatus of claim 2, the heat transfer device further comprising: a circuit coupled to the magnetic coil, the circuit for providing the electric current.
Claim 5
Dependent Claim
13 words
The heat transfer apparatus of claim 3, wherein the circuit is computer controlled.
Claim 6
Dependent Claim
16 words
The heat transfer apparatus of claim 4 wherein there are from 12 to 14 rotor blades.
Claim 7
Dependent Claim
21 words
The heat transfer apparatus of claim 5 wherein the heat transfer liquid fills from 50% to 95% of the heat pipe.
Claim 8
Dependent Claim
101 words
A computer system comprising: an integrated circuit, the integrated circuit capable of generating heat during operation; a heat transfer apparatus coupled to the integrated circuit for transferring heat away from the integrated circuit, the heat transfer apparatus including: a heat pipe containing a heat transfer liquid; a magnetic coil surrounding the heat pipe, the magnetic coil for producing a magnetic field when an electric current is supplied to the magnetic coil, the magnetic field passing through the heat pipe; and an agitator disposed in the heat pipe, the agitator for agitating the heat transfer liquid in response to the magnetic field.
Claim 9
Dependent Claim
101 words
A computer system comprising: an integrated circuit, the integrated circuit capable of generating heat during operation; a heat transfer apparatus coupled to the integrated circuit for transferring heat away from the integrated circuit, the heat transfer apparatus including: a heat pipe containing a heat transfer liquid; a magnetic coil surrounding the heat pipe, the magnetic coil for producing a magnetic field when an electric current is supplied to the magnetic coil, the magnetic field passing through the heat pipe; and an agitator disposed in the heat pipe, the agitator for agitating the heat transfer liquid in response to the magnetic field.
Claim 10
Dependent Claim
33 words
The computer system of claim 7, wherein the agitator is a rotor assembly, the rotor assembly including a plurality of rotor blades, a fixed magnet being coupled to at least one rotor blade.
Claim 11
Dependent Claim
26 words
The computer system of claim 8, the heat transfer device further comprising: a circuit coupled to the magnetic coil, the circuit for providing the electric current.
Claim 12
Dependent Claim
13 words
The computer system of claim 7, wherein the integrated circuit is a processor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-08-14 | 1999-02-13 | 1999-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-14 | 2003-02-13 | 2003-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-14 | 2007-02-13 | 2007-08-15 | $7700.00 | Window Closed / Lapsed |