US4587377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically insulating fastener for heat sinks of different thicknesses
Assignee: Illinois Tool Works Inc
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Filing: 1984-09-21
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Granted: 1986-05-06
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Expires: 2004-09-21
Abstract
Abstract An electrically insulating fastener having three pre-assembled elements. A nut with a tubular body and an integral spring flange has a disc-shaped spacer attached to the flange. The spacer has a central opening with a cylindrical collar formed around it. A flexible and resilient rubber sleeve is fitted over the collar. The nut, spacer, and sleeve form a unitary fastener which can be used with a headed threaded fastener to make electrical connections through heat sinks of various thicknesses.
Inventors
- 👤 William G. Rodseth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:24
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/20; H05K7/2039; H05K7/20509; H05K7/02; H05K7/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
An insulator for use in electrically isolating a plurality of heat generating components attached to a heat sink of predetermined thickness, said insulator comprising a generally flat spacer having means for attaching said spacer to an associated nut, a collar integrally formed with and extending from said spacer, a movable sleeve pre-assembled to and carried by said collar, said collar and said sleeve projecting generally perpendicularly from said spacer, said collar and said sleeve being generally concentrically disposed tubular elements having a predetermined longitudinal extent , said sleeve being a resilient collapsible rubber sleeve fitted over said collar , whereby, upon assembly of said components to said heat sink, said longitudinal extent is reducible to generally equal said thickness thereby fully insulating said components from said heat sink.
Claim 2
Dependent Claim
128 words
An insulator for use in electrically isolating a plurality of heat generating components attached to a heat sink of predetermined thickness, said insulator comprising a generally flat spacer having means for attaching said spacer to an associated nut, a collar integrally formed with and extending from said spacer, a movable sleeve pre-assembled to and carried by said collar, said collar and said sleeve projecting generally perpendicularly from said spacer, said collar and said sleeve being generally concentrically disposed tubular elements having a predetermined longitudinal extent , said sleeve being a resilient collapsible rubber sleeve fitted over said collar , whereby, upon assembly of said components to said heat sink, said longitudinal extent is reducible to generally equal said thickness thereby fully insulating said components from said heat sink.
Claim 3
Dependent Claim
30 words
An insulator according to claim 1 wherein said means for attaching said spacer to a nut comprise an axially extending skirt and a portion of said skirt being sonically deformable.
Claim 4
Dependent Claim
15 words
An insulator according to claim 1 wherein said sleeve is adhesively attached to said collar.
Claim 5
Dependent Claim
29 words
An insulator according to claim 1 wherein said spacer includes a generally axially extending skirt with means disposed thereon for creating channels for flow of fluids beneath said spacer.
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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) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |