US5307239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanical module with small footprint and post-solder attachable/removable heat sink frame
Assignee: Unisys Corp
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Filing: 1992-10-08
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Granted: 1994-04-26
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Expires: 2012-10-08
Abstract
Abstract An electro-mechanical module comprises a packaged electrical part having a surface which dissipates heat, and a springy frame which overlies that surface. This frame includes a pair of fasteners for catching on the package at two predetermined locations, and the frame has an unstressed state in which the fasteners do not coincide with the two locations. However, the frame is springy enough to be stressed and thereby move the fasteners to the two locations, and thereafter return back towards the unstressed state and catch the fasteners on the package at the two locations. To complete the module, a heat sink rests on the surface and is removably attached to the frame.
Inventors
- 👤 Paul McCarty
- 👤 Jerry I. Tustaniwskyj
- 👤 Jon L. Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:06
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/60; H10W40/641
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
141 words
An assembled electro-mechanical module comprising: a thin flat packaged electrical part having smooth edges and a top surface which dissipates heat; a springy frame which overlies and contacts said top surface; said frame including a pair of fasteners and having an unstressed state, when said module is disassembled, in which said fasteners are separated by a distance which prohibits said fasteners from being caught on said smooth edges at two predetermined locations; said frame being springy and distorted by stress in said assembled module such that said distance is increased and said fasteners are caught on said smooth edges as said two locations; a heat sink which rests on said top surface and is removably attached to said frame; and said heat sink and said frame, except for a portion of said fasteners fitting entirely within the perimeter of said edges.
Claim 2
Dependent Claim
141 words
An assembled electro-mechanical module comprising: a thin flat packaged electrical part having smooth edges and a top surface which dissipates heat; a springy frame which overlies and contacts said top surface; said frame including a pair of fasteners and having an unstressed state, when said module is disassembled, in which said fasteners are separated by a distance which prohibits said fasteners from being caught on said smooth edges at two predetermined locations; said frame being springy and distorted by stress in said assembled module such that said distance is increased and said fasteners are caught on said smooth edges as said two locations; a heat sink which rests on said top surface and is removably attached to said frame; and said heat sink and said frame, except for a portion of said fasteners fitting entirely within the perimeter of said edges.
Claim 3
Dependent Claim
12 words
A module according to claim 1 wherein said frame is ring shaped.
Claim 4
Dependent Claim
16 words
A module according to claim 1 wherein said frame is shaped as part of a ring.
Claim 5
Dependent Claim
22 words
A module according to claim 1 wherein said frame has sides with a predetermined cross-section that gives the frame a certain flexibility.
Claim 6
Dependent Claim
13 words
A module according to claim 1 wherein said frame is made of plastic.
Claim 7
Dependent Claim
21 words
A module according to claim 1 wherein said frame includes a pair of tabs which, when squeezed, move said fasteners outward.
Claim 8
Dependent Claim
12 words
A module according to claim 2 wherein said ring-shaped frame is rectangular.
Claim 9
Dependent Claim
12 words
A module according to claim 2 wherein said ring-shaped frame is circular.
Claim 10
Dependent Claim
14 words
A module according to claim 4 wherein said cross-section is a uniform rectangular cross-section.
Claim 11
Dependent Claim
14 words
A module according to claim 4 wherein said cross-section is a uniform circular cross-section.
Claim 12
Dependent Claim
14 words
A module according to claim 4 wherein said cross-section is a non-uniform rectangular cross-section.
Claim 13
Dependent Claim
14 words
A module according to claim 4 wherein said cross-section is a non-uniform circular cross-section.
References Cited (Backward Citations)
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Cited
US4652973A
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US4745456A
Cited
US5019940A
Cited
US4978638A
Cited
US5132875A
Cited
US5208731A
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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) | 1997-04-25 | 1997-10-25 | 1998-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-25 | 2001-10-25 | 2002-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-25 | 2005-10-25 | 2006-04-26 | $7700.00 | Window Closed / Lapsed |