US3672712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structure for connecting attachments to fiberglass rods
Assignee: Individual
•
Filing: 1970-07-06
•
Granted: 1972-06-27
•
Expires: 1990-07-06
Abstract
Abstract A structure for connecting an attachment to the end of a fiberglass rod, tube or other profile. The rod is separated into a plurality of segments which are held apart from each other by a spacer-spreader. A plug is disposed within the interior of the separated segments, preferably being cast in place. A cavity is formed around the exterior of the segments, also preferably being cast in place. Means forming a slip plane is provided between the exterior of the segments and the cavity so that upon the application of longitudinal tension to the rod, the segments and plug will move longitudinally within the cavity to convert such tension into lateral compression which transfers the load across the entire cross-section of the rod.
Inventors
- 👤 Elbert Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:35
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/68; B29C70/84; F; F16; F16B; F16B11/00; F16B11/006; F16B11/008; F16B7/00; F16B7/02; F16G; F16G11/00; F16G11/02; F16G11/025; F16G11/04; F16G11/042; H; H01; H01B; H01B17/00; H01B17/38; B29L; B29L2031/00; B29L2031/06; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3909; Y10T403/00; Y10T403/47; Y10T403/473
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
174 words
A structure for connecting an attachment to the end of a solid elongated member formed of a multiplicity of relatively fine filaments, said structure comprising an outwardly tapering enlargement disposed at the end of said member, means forming a cavity having an interior formed complementarily to and extending around the exterior of said enlargement, said cavity being formed of potting compoUnd disposed within a fitting surrounding said enlargement, so that the interior of said cavity is completely complementary to the exterior of said enlargement, and a relatively thin barrier film of friction reducing material disposed about the exterior of said enlargement, said barrier film forming a slip plane between the exterior of said enlargement and the interior of said cavity, whereby upon the application of longitudinal tension to said elongated member, said elongated member and tapered enlargement are adapted to move simultaneously as a unit longitudinally within said cavity to convert said tension into lateral compression which transfers the load across the entire cross-section of the portion of said member disposed within said cavity.
Claim 2
Dependent Claim
174 words
A structure for connecting an attachment to the end of a solid elongated member formed of a multiplicity of relatively fine filaments, said structure comprising an outwardly tapering enlargement disposed at the end of said member, means forming a cavity having an interior formed complementarily to and extending around the exterior of said enlargement, said cavity being formed of potting compoUnd disposed within a fitting surrounding said enlargement, so that the interior of said cavity is completely complementary to the exterior of said enlargement, and a relatively thin barrier film of friction reducing material disposed about the exterior of said enlargement, said barrier film forming a slip plane between the exterior of said enlargement and the interior of said cavity, whereby upon the application of longitudinal tension to said elongated member, said elongated member and tapered enlargement are adapted to move simultaneously as a unit longitudinally within said cavity to convert said tension into lateral compression which transfers the load across the entire cross-section of the portion of said member disposed within said cavity.
Claim 3
Dependent Claim
14 words
The structure described in claim 1, in which said barrier film comprises polytetrafluoroethylene material.
Claim 4
Dependent Claim
21 words
The structure described in claim 2, in which said barrier film comprises polytetrafluoroethylene tape wound around the outside of said enlargement.
Claim 5
Dependent Claim
27 words
The structure described in claim 1, in which said enlargement includes a plug formed of potting compound disposed between separated segments of the end of said member.
Claim 6
Dependent Claim
66 words
The structure described in claim 4, in which said cavity is formed of potting compound disposed within a fitting surrounding said enlargement, so that the interior of said cavity is completely complementary to the exterior of said enlargement, and in which both said cavity and said plug are formed of a potting compound of epoxy resin with a catalyst and powdered reinforcing filler for compressive strength.
Claim 7
Dependent Claim
20 words
The structure described in claim 5, in which said elongated member comprises fiberglass and said barrier film comprises polytetrafluoroethylene material.
References Cited (Backward Citations)
GB143004A
Cited
US1577003A
Cited
US2869214A
Cited
CH346846A
Cited
US3085305A
Cited
US3100924A
Cited
US3226805A
Cited
US3263289A
Cited
US3409951A
Cited
US3450829A
Cited
US3534989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |