Patent US4587377A successfully refreshed from Google Patents.
US4587377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically insulating fastener for heat sinks of different thicknesses
Assignee: Illinois Tool Works Inc
•
Filing: 1984-09-21
•
Granted: 1986-05-06
•
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 06:38
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.
References Cited (Backward Citations)
CA695585A
Cited
US3122679A
Cited
US3263200A
Cited
US3272952A
Cited
US3369597A
Cited
US3619473A
Cited
US3652903A
Cited
US3801874A
Cited
US4007477A
Cited
US4041523A
Cited
US4266267A
Cited
US4446504A
Cited
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 |