US5760333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-generating element cooling device
Assignee: PFU Ltd
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Filing: 1996-07-24
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Granted: 1998-06-02
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Expires: 2016-07-24
Abstract
Abstract A cooling device mounting a fan unit above a heat sink mounted on a heat-generating element or buried therein, which produces an effective air flow and achieves a uniform cooling action by having the heat sink shown in various shapes. Further, a cooling fan disposed away from the heat sink or to the side of the same is used for effective cooling through an air conduit passage formed by pipes or a cover.
Inventors
- 👤 Takashi Kitahara
- 👤 Tadayoshi Shimanuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:22
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/40; H10W40/43; F; F28; F28F; F28F13/00; F28F13/06; F28F3/00; F28F3/02; F28F3/022; H10W40/70; H10W40/73
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
172 words
A heat-generating element cooling device comprising a heat sink disposed on a top surface of a heat-generating element and having a body, a base, a top surface and a plurality of heat-radiating fins disposed on a surface of said base except at least at a fan mounting portion, a cover having an air intake and exhaust opening facing the fan mounting portion of said heat sink and attached so as to cover the top surface of said heat sink, a cooling fan unit having fan blades and being mounted so as to be positioned beneath the air intake and exhaust opening of said cover and embedded within the body of said heat sink, and circuit components for driving the fan unit separate from the fan unit and attached to at least one of an inner surface of said cover and an inner surface of said heat sink thereby reducing the thickness of the fan unit to ensure an air gap between the fan blades and the base and to improve cooling efficiency.
Claim 2
Dependent Claim
172 words
A heat-generating element cooling device comprising a heat sink disposed on a top surface of a heat-generating element and having a body, a base, a top surface and a plurality of heat-radiating fins disposed on a surface of said base except at least at a fan mounting portion, a cover having an air intake and exhaust opening facing the fan mounting portion of said heat sink and attached so as to cover the top surface of said heat sink, a cooling fan unit having fan blades and being mounted so as to be positioned beneath the air intake and exhaust opening of said cover and embedded within the body of said heat sink, and circuit components for driving the fan unit separate from the fan unit and attached to at least one of an inner surface of said cover and an inner surface of said heat sink thereby reducing the thickness of the fan unit to ensure an air gap between the fan blades and the base and to improve cooling efficiency.
Claim 3
Dependent Claim
60 words
A heat-generating element cooling device as set forth in claim 1, wherein flat wiring strips are attached to at least one of the inner surface of the cover and the inner surface of the heat sink for electrically connecting the circuit components for driving the fan unit thereby further reducing the air gap between the cover and the heat sink.
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) | 2001-06-01 | 2001-12-01 | 2002-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-01 | 2005-12-01 | 2006-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-01 | 2009-12-01 | 2010-06-02 | $7700.00 | Window Closed / Lapsed |