Patent US2706944A successfully refreshed from Google Patents.
US4721155A
Expired / Lapsed
US
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Sawtooth card retainer
Assignee: RTX Corp
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Filing: 1986-05-07
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Granted: 1988-01-26
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Expires: 2006-05-07
Abstract
Abstract A printed circuit board heat sink retainer is disclosed comprising a mating pair of sawtoothed bars with slidably engaging teeth. The bars are laterally spread apart and held by a forcing device, which may be a screw or a spring, in order to push against and hold a heat sink in a channel. The distance between successive teeth may be constant in both bars or may be constant in one bar and may decrease in a direction toward the forcing device in the second bar.
Inventors
- 👤 Christopher T. McNulty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:36
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/14; H05K7/1401; H05K7/1402; H05K7/1404
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A printed circuit board heat sink retainer, comprising: a first sawtoothed piece bonded to an internal chassis wall between a pair of ribs integral to said wall and butted up against one of the ribs, wherein the distance between successive teeth is constant; a second sawtoothed piece loosely held between the ribs for mating its sawteeth with the teeth of the first piece, wherein the distance between successive teeth decreases in the direction of a spread apart and hold force; and spread apart and hold means, for providing said spread apart and hold force for spreading and holding said first and second pieces apart such that the second piece pushes against a heat sink inserted between it and a rib.
Claim 2
Dependent Claim
120 words
A printed circuit board heat sink retainer, comprising: a first sawtoothed piece bonded to an internal chassis wall between a pair of ribs integral to said wall and butted up against one of the ribs, wherein the distance between successive teeth is constant; a second sawtoothed piece loosely held between the ribs for mating its sawteeth with the teeth of the first piece, wherein the distance between successive teeth decreases in the direction of a spread apart and hold force; and spread apart and hold means, for providing said spread apart and hold force for spreading and holding said first and second pieces apart such that the second piece pushes against a heat sink inserted between it and a rib.
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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) | 1991-01-25 | 1991-07-27 | 1992-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-25 | 1995-07-27 | 1996-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-25 | 1999-07-27 | 2000-01-26 | $7700.00 | Window Closed / Lapsed |