US3698749A
Expired / Lapsed
US
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End fitting
Assignee: Joslyn Corp
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Filing: 1969-12-31
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Granted: 1972-10-17
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Expires: 1989-12-31
Abstract
Abstract A tapered end fitting for a glass fiber rod applies a substantially uniform stress to the portion of the rod falling within the end fitting, and thus can withstand tensile loadings up to the tensile strength of the rod itself. A uniform stress distribution is achieved by designing the end fitting so that it subjects to the rod to a uniform volume strain. This, in turn, is achieved either by properly tapering the inner surface of the end fitting outer jacket, or by properly choosing the characteristics of the collect which fills the space between the rod and the outer jacket of the end fitting.
Inventors
- 👤 Edward H Yonkers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:55
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/38; H01B17/40; E; E04; E04C; E04C5/00; E04C5/08; E04C5/12; E04C5/122; F; F16; F16G; F16G11/00; F16G11/04; F16G11/044; F16G11/048; F16B; F16B2200/00; F16B2200/10; F16B2200/30; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7047; Y10T403/7051; Y10T403/7052
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
174 words
An end fitting comprising: a solid, compressible rod having first and second ends, the first end of which rod is subjected to a tensile load; a cylindrical, non-compressible outer jacket having an inner surface which surface surrounds the second end of said rod; a material substance filling the space between the inner surface of said jacket and the second end of said rod, said material substance adhering to said rod and slidably engaging the inner surface of said jacket so that said rod and said material substance are free to slide within said jacket when said rod is subjected to a tensile load; and a nonlinear taper on the inner surface of said jacket which nonlinear taper causes said material substance to compress all portions of the second end of said rod by substantially the same amount when said rod and said material substance are shifted within said jacket by a tensile load; whereby the volume strain applied to the second end of said rod is uniformly distributed along the axis of the rod.
Claim 2
Dependent Claim
174 words
An end fitting comprising: a solid, compressible rod having first and second ends, the first end of which rod is subjected to a tensile load; a cylindrical, non-compressible outer jacket having an inner surface which surface surrounds the second end of said rod; a material substance filling the space between the inner surface of said jacket and the second end of said rod, said material substance adhering to said rod and slidably engaging the inner surface of said jacket so that said rod and said material substance are free to slide within said jacket when said rod is subjected to a tensile load; and a nonlinear taper on the inner surface of said jacket which nonlinear taper causes said material substance to compress all portions of the second end of said rod by substantially the same amount when said rod and said material substance are shifted within said jacket by a tensile load; whereby the volume strain applied to the second end of said rod is uniformly distributed along the axis of the rod.
Claim 3
Dependent Claim
72 words
An end fitting as defined in claim 1 wherein the material substance is less compressible than the rod, and wherein the inner surface of said jacket is tapered nonlinearly in such a manner that a sectional view of the end fitting, in which the end fitting is sectioned by a plane that includes the rod axis, reveals the taper of the inner surface to be generally concave with respect to the rod.
Claim 4
Dependent Claim
28 words
An end fitting as Defined in claim 2 wherein the concave taper of the inner surface of said jacket is formed from a plurality of straight line segments.
Claim 5
Dependent Claim
31 words
An end fitting as defined in claim 2 wherein the taper of the inner surface of said jacket, when viewed in section as in claim 21, is generally parabolic in shape.
Claim 6
Dependent Claim
77 words
An end fitting as defined in claim 4 wherein the inner surface of the outer jacket is tapered substantially in accordance with the equation R A(BX + 1)1/2 where X is a distance measured axially along the rod from a fixed reference point and away from the tensile loaded end of the rod, where R is the radial distance from the rod axis to a point on the inner surface, and where A and B are constants.
Claim 7
Dependent Claim
78 words
An end fitting as defined in claim 2 wherein the inner surface of the outer jacket is tapered substantially in accordance with the equation R A( B(1n(CX + 1))+1)1/2 where X is a distance measured axially along the rod from a fixed reference point and away from the tensile loaded end of the rod, where R is the distance from the rod axis to a point on the inner surface, and where A, B, and C are constants.
Claim 8
Dependent Claim
75 words
An end fitting as defined in claim 1 wherein the material substance has approximately the same compressibility as does the rod, and wherein the inner surface of said jacket is tapered nonlinearly in such a manner that a sectional view of the end fitting, in which the end fitting is sectioned by a plane that includes the rod axis, reveals the taper of the inner surface to be generally convex with respect to the rod.
Claim 9
Dependent Claim
28 words
An end fitting as defined in claim 7 wherein the convex taper of the inner surface of said jacket is formed from a plurality of straight line segments.
Claim 10
Dependent Claim
31 words
An end fitting as defined in claim 7 wherein the taper of the inner surface of said jacket, when viewed in section as in claim 21, is generally exponential in shape.
Claim 11
Dependent Claim
77 words
An end fitting as defined in claim 9 wherein the inner surface of the outer jacket is tapered substantially in accordance with the equation R A exp (BX) where X is a distance measured axially along the rod from a fixed reference point and away from the tensile loaded end of the rod, where R is the radial distance from the rod axis to a point on the inner surface, and where A and B are constants.
Claim 12
Dependent Claim
78 words
An end fitting as defined in claim 7 wherein the inner surface of the outer jacket is tapered substantially in accordance with the equation R A(BX + 1)C where X is a distance measured axially along the rod from a fixed reference point and away from the tensile loaded end of the rod, where R is the radial distance from the rod axis to a point on the inner surface, and where A, B, and C are constants.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |