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US4457360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-lead heat sink
Assignee: United States Department of Energy
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Filing: 1982-08-25
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Granted: 1984-07-03
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Expires: 2002-08-25
Abstract
Abstract The disclosure relates to a heat sink used to protect integrated circuits from the heat resulting from soldering them to circuit boards. A tubular housing contains a slidable member which engages somewhat inwardly extending connecting rods, each of which is rotatably attached at one end to the bottom of the housing. The other end of each rod is fastened to an expandable coil spring loop. As the member is pushed downward in the housing, its bottom edge engages and forces outward the connecting rods, thereby expanding the spring so that it will fit over an integrated circuit. After the device is in place, the member is slid upward and the spring contracts about the leads of the integrated circuit. Soldering is now conducted and the spring absorbs excess heat therefrom to protect the integrated circuit. The placement steps are repeated in reverse order to remove the heat sink for use again.
Inventors
- 👤 Lars D. Roose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:21
CPC Classifications
B; B23; B23K; B23K3/00; B23K3/08; B23K3/085; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44017; Y10T24/44026; Y10T24/44641; Y10T24/44949; Y10T24/44957
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
A multi-lead heat sink apparatus comprising; an expandible lead encircling heat sink including a loop of coil spring having a preselected untensioned size; means for expanding said heat sink to allow it to be placed over an electronic device; and means for enabling said heat sink to contract to said preselected size after said heat sink is placed over said device to cause it to physically contact all of the leads thereof so that the leads of the device may be safely soldered.
Claim 2
Dependent Claim
83 words
A multi-lead heat sink apparatus comprising; an expandible lead encircling heat sink including a loop of coil spring having a preselected untensioned size; means for expanding said heat sink to allow it to be placed over an electronic device; and means for enabling said heat sink to contract to said preselected size after said heat sink is placed over said device to cause it to physically contact all of the leads thereof so that the leads of the device may be safely soldered.
Claim 3
Independent Claim
55 words
An apparatus comprising: expandable and contractable means for encircling and physically contacting the leads of an electronic device; said lead encircling means comprising a loop of coiled spring; housing means; means for attaching said lead encircling means to said housing means; and means extendable from said housing for expanding and contracting said lead encircling means.
Claim 4
Independent Claim
55 words
An apparatus comprising: expandable and contractable means for encircling and physically contacting the leads of an electronic device; said lead encircling means comprising a loop of coiled spring; housing means; means for attaching said lead encircling means to said housing means; and means extendable from said housing for expanding and contracting said lead encircling means.
Claim 5
Dependent Claim
38 words
The invention of claim 2 wherein said attaching means comprises a plurality of connecting rods, each rod being rotatably attached at one end to said housing means and at its other end fastened to said lead encircling means.
Claim 6
Dependent Claim
13 words
The invention of claim 2 wherein said housing comprises a generally tubular structure.
Claim 7
Dependent Claim
40 words
The invention of claim 4 wherein said connecting rods are somewhat inwardly extending and said extendable means comprises a longitudinal member, longitudinally slidably positionable within said tubular structure, which pushes outwardly said connecting rods when pushed down through said housing.
Claim 8
Dependent Claim
275 words
A heat sink apparatus for protecting an electronic device from heat during the soldering of its leads, said apparatus comprising; a generally tubular housing; an inner slightly tapered generally cylindrical member longitudinally slidably disposed within said tubular housing, the lower end of said member being just sufficiently large to fail to pass upwardly through the lower end of said tubular housing, said member being somewhat longer in length than the length of said tubular housing, the smaller upper end of said member extending somewhat above the upper end of said housing when said member is at its uppermost position in said housing and extending somewhat below the lower end of said housing when said member is at its lowermost position in said housing; a loop of coil spring having a preselected untensioned size somewhat smaller than the lower end of said housing, said preselected size being suitable to contact all the leads of the electronic device when said spring is untensioned and positioned about said leads; a plurality of connecting rods, each fastened at its lower end to the spring and at is upper end rotatably attached to the lower end of said housing, said rods acting to suspend said spring from said housing, said rods extending somewhat inwardly from the lower end of said housing to said spring when said member is at its upwards position and said spring is therefore untensioned, and said rods being forced outwardly by downward movement of the lower end of said member to cause said loop of spring to become sufficiently large to encircle the body of said electronic device when said member is in its lowest position.
Claim 9
Dependent Claim
275 words
A heat sink apparatus for protecting an electronic device from heat during the soldering of its leads, said apparatus comprising; a generally tubular housing; an inner slightly tapered generally cylindrical member longitudinally slidably disposed within said tubular housing, the lower end of said member being just sufficiently large to fail to pass upwardly through the lower end of said tubular housing, said member being somewhat longer in length than the length of said tubular housing, the smaller upper end of said member extending somewhat above the upper end of said housing when said member is at its uppermost position in said housing and extending somewhat below the lower end of said housing when said member is at its lowermost position in said housing; a loop of coil spring having a preselected untensioned size somewhat smaller than the lower end of said housing, said preselected size being suitable to contact all the leads of the electronic device when said spring is untensioned and positioned about said leads; a plurality of connecting rods, each fastened at its lower end to the spring and at is upper end rotatably attached to the lower end of said housing, said rods acting to suspend said spring from said housing, said rods extending somewhat inwardly from the lower end of said housing to said spring when said member is at its upwards position and said spring is therefore untensioned, and said rods being forced outwardly by downward movement of the lower end of said member to cause said loop of spring to become sufficiently large to encircle the body of said electronic device when said member is in its lowest position.
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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) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |