Patent US4491687A successfully refreshed from Google Patents.
US4491687A
Expired / Lapsed
US
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Method of manufacturing a composite type stay insulator, and an insulator obtained by the method
Assignee: Ceraver SA
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Filing: 1982-07-22
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Granted: 1985-01-01
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Expires: 2002-07-22
Abstract
Abstract A composite type stay insulator comprises a central mandrel (4) made of insulating foam and having its ends (5) glued at (6) to two metal end pieces (1). The glue may be optionally conductive or semiconductive. A skein winding (8) of insulating resin-impregnated fibers is made around the end piece and mandrel assembly to transmit traction forces from a shoulder (7) on one of the end pieces to a corresponding shoulder on the other. The winding is then covered with a resilient insulating covering (9) which is optionally fitted with fins.
Inventors
- 👤 Alexandre Kaczerginski
- 👤 Jean-Jacques Kaminski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:36
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/32; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49227
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
69 words
A method of manufacturing a composite type stay insulator including two metal end pieces having anchoring shoulders, the method comprising: gluing the two metal end pieces to a mandrel of insulating foam; skein winding resin impregnated insulating fibers around the mandrel and said anchoring shoulders of the metal pieces; and adhering a resilient insulating covering to said winding and to portions of the end pieces adjacent to said winding.
Claim 2
Independent Claim
69 words
A method of manufacturing a composite type stay insulator including two metal end pieces having anchoring shoulders, the method comprising: gluing the two metal end pieces to a mandrel of insulating foam; skein winding resin impregnated insulating fibers around the mandrel and said anchoring shoulders of the metal pieces; and adhering a resilient insulating covering to said winding and to portions of the end pieces adjacent to said winding.
Claim 3
Dependent Claim
56 words
A method according to claim 1, wherein the step of adhering an insulating covering comprises: adhering a partial covering initially over the surface of the portion of the winding on the mandrel and then molding terminal fins over the end portions of the winding and over said portions of the end pieces adjacent to said winding.
Claim 4
Dependent Claim
86 words
A composite type stay insulator comprising: an insulating foam mandrel having two ends; two metal end pieces having anchoring shoulders, one end piece being glued to one end of the mandrel and the other end piece being glued to the other end of the mandrel; a layer of resin impregnated insulating fibers skein wound around the mandrel and said anchoring shoulders of the metal end pieces; and a resilient insulating covering adhered to said winding and to portions of the end pieces adjacent to said winding.
Claim 5
Dependent Claim
86 words
A composite type stay insulator comprising: an insulating foam mandrel having two ends; two metal end pieces having anchoring shoulders, one end piece being glued to one end of the mandrel and the other end piece being glued to the other end of the mandrel; a layer of resin impregnated insulating fibers skein wound around the mandrel and said anchoring shoulders of the metal end pieces; and a resilient insulating covering adhered to said winding and to portions of the end pieces adjacent to said winding.
Claim 6
Dependent Claim
30 words
A composite type stay insulator according to claim 3, wherein the insulating foam of the mandrel is selected from the group consisting of polyurethane foam, polyisocyanurate foam, and epoxy foam.
Claim 7
Dependent Claim
29 words
A composite type stay insulator according to claim 4, wherein the insulating foam of the mandrel is an epoxy foam, and sulfur hexafluoride is used as a foaming agent.
Claim 8
Dependent Claim
29 words
A composite type stay insulator according to claim 3, wherein said insulating fibers are selected from the group consisting of glass fibers, silica fibers, polyester fibers, and aramide fibers.
Claim 9
Dependent Claim
29 words
A composite type stay insulator according to claim 3, wherein the material of said resilient insulating covering is selected from the group consisting of EPDM, silicones, polyurethanes, and epoxies.
Claim 10
Dependent Claim
38 words
A composite type stay insulator according to claim 3, wherein the end pieces are glued to the ends of the mandrel by a glue that is initially solid, that becomes sticky on heating, and that is self hardening.
Claim 11
Dependent Claim
14 words
A composite type stay insulator according to claim 8, wherein said glue is conductive.
Claim 12
Dependent Claim
14 words
A composite type stay insulator according to claim 8, wherein said glue is semiconductive.
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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) | 1988-01-01 | 1988-07-02 | 1989-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-01 | 1992-07-02 | 1993-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-01 | 1996-07-02 | 1997-01-01 | $7700.00 | Window Closed / Lapsed |