US5384940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking heat sinks for surface mount devices
Assignee: Aavid Thermal Products Inc
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Filing: 1994-07-27
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Granted: 1995-01-31
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Expires: 2014-07-27
Abstract
Abstract A device for attaching a heat sink to an electronic package comprises a pin having a compressible point, the point being adapted to pass through aligned holes in a heat sink and a printed circuit board so that the point compresses as it passes into two holes and flexes back to an expanded position after it exits the printed circuit board hole opposite the heat sink thereby holding the heat sink to the board with the electronic package therebetween.
Inventors
- 👤 Christopher A. Soule
- 👤 Gary F. Kuzmin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:03
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/60; H10W40/641; Y; Y10; Y10T; Y10T24/00; Y10T24/42; Y10T24/45; Y10T24/45225; Y10T24/45597
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
261 words
A device for connecting a heat sink to an electronic device mounted on a printed circuit board or other connector comprising: a shaft, said shaft being cylindrical and having an expanded top at one end, which top has a greater diameter than said shaft, said shaft having a cone disposed at an end opposite said top, said cone having a base disposed adjacent to said shaft and a tip disposed opposite said shaft, said base having a greater diameter than said shaft, said cone and at least a portion of said shaft adjacent to said cone having a slot therethrough so as to form on said cone a first prong and a second prong, biasing means comprising a cylindrical spring surrounding said shaft and having a smaller diameter than said top and said base of said cone, whereby when said device is in use, said device is connected to the heat sink or other connector by inserting said cone into a hole on the heat sink or other connector so that said first and said second prongs flex towards each other, the flexure of which serves to reduce the effective diameter of said cone, and after said cone has passed through the hole unflexing so as to hold the device to the heat sink or other connector, and said biasing means adapted to engage the heat sink or other connector when said device is in place so as to in cooperation with said expanded top of said shaft hold said base of said cone against the heat sink or other connector.
Claim 2
Independent Claim
261 words
A device for connecting a heat sink to an electronic device mounted on a printed circuit board or other connector comprising: a shaft, said shaft being cylindrical and having an expanded top at one end, which top has a greater diameter than said shaft, said shaft having a cone disposed at an end opposite said top, said cone having a base disposed adjacent to said shaft and a tip disposed opposite said shaft, said base having a greater diameter than said shaft, said cone and at least a portion of said shaft adjacent to said cone having a slot therethrough so as to form on said cone a first prong and a second prong, biasing means comprising a cylindrical spring surrounding said shaft and having a smaller diameter than said top and said base of said cone, whereby when said device is in use, said device is connected to the heat sink or other connector by inserting said cone into a hole on the heat sink or other connector so that said first and said second prongs flex towards each other, the flexure of which serves to reduce the effective diameter of said cone, and after said cone has passed through the hole unflexing so as to hold the device to the heat sink or other connector, and said biasing means adapted to engage the heat sink or other connector when said device is in place so as to in cooperation with said expanded top of said shaft hold said base of said cone against the heat sink or other connector.
Claim 3
Dependent Claim
11 words
The device of claim 1 wherein said expanded top is cylindrical.
Claim 4
Dependent Claim
21 words
The device of claim 1 wherein said slot extends entirely through said cone and at least a portion of said shaft.
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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) | 1998-01-30 | 1998-08-01 | 1999-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-30 | 2002-08-01 | 2003-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-30 | 2006-08-01 | 2007-01-31 | $7700.00 | Window Closed / Lapsed |