US4424991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite connector
Assignee: Raychem Ltd
•
Filing: 1981-08-31
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Granted: 1984-01-10
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Expires: 2001-08-31
Abstract
Abstract The substantial change in modulus with temperature of certain materials, especially memory metals, is used to make a novel connector by forcing a band made from such a material in its low modulus state up an external tapered portion of a tubular coupling member so as to deform the band which remains in position about the coupling member. To make a connection one or more substrates is(are) positioned inside the tubular coupling member and the band is brought to its high modulus state whereupon it contracts and deforms the tubular coupling member and forces it into firm connection with the substrate.
Inventors
- 👤 Frederick W. L. Hill
- 👤 Robin J. T. Clabburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:39
CPC Classifications
B; B23; B23P; B23P11/00; B23P11/02; B23P11/025; F; F16; F16L; F16L13/00; F16L13/004; F16L47/00; F16L47/20; F16L47/22; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49945
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
174 words
A connector, having a bore therethrough, which comprises a circumferentially continuous, tubular member having a first portion of a greater external diameter and a second portion of a lesser external diameter, than said first portion at least a portion of the tubular member having an elongated tapered outer surface extending between said first and second portions, and, positioned about said tubular member away from the second portion, a band that is relatively narrow compared to the length of the elongated tapered outer surface, the band being made from a memory metal which exhibits a relatively low modulus of elasticity at a first temperature and a relatively high modulus of elasticity at a second temperature higher than the first temperature, the band having been expanded solely by being forced at the first temperature along and against the taper so as to expand the band, the relatively high modulus of elasticity of the material of the band being such that when the band is brought to said second temperature, it contracts and deforms the tubular member.
Claim 2
Dependent Claim
174 words
A connector, having a bore therethrough, which comprises a circumferentially continuous, tubular member having a first portion of a greater external diameter and a second portion of a lesser external diameter, than said first portion at least a portion of the tubular member having an elongated tapered outer surface extending between said first and second portions, and, positioned about said tubular member away from the second portion, a band that is relatively narrow compared to the length of the elongated tapered outer surface, the band being made from a memory metal which exhibits a relatively low modulus of elasticity at a first temperature and a relatively high modulus of elasticity at a second temperature higher than the first temperature, the band having been expanded solely by being forced at the first temperature along and against the taper so as to expand the band, the relatively high modulus of elasticity of the material of the band being such that when the band is brought to said second temperature, it contracts and deforms the tubular member.
Claim 3
Dependent Claim
27 words
A connector as claimed in claim 1, wherein both ends of the tubular member are externally tapered and a band is provided at each of said ends.
Claim 4
Dependent Claim
32 words
A connector as claimed in claim 2, wherein the ends of said tubular member taper from a central region having the greater external diameter to a terminal region of lesser external diameter.
Claim 5
Dependent Claim
32 words
A connector as claimed in claim 2, wherein the ends of said tubular member taper from a central region of lesser external diameter to a terminal region having the greater external diameter.
Claim 6
Dependent Claim
22 words
A connector as claimed in claim 1, wherein the tubular member is provided with means for facilitating proper positioning of the band.
Claim 7
Dependent Claim
22 words
A connector as claimed in claim 5, wherein said means comprises a shoulder formed on the external surface of the tubular member.
Claim 8
Dependent Claim
22 words
A connector as claimed in claim 5, wherein a separate positioning member is provided on the external surface of the tubular member.
Claim 9
Dependent Claim
23 words
A connector as claimed in claim 7, wherein the separate positioning member engages a groove on the external surface of the tubular member.
Claim 10
Dependent Claim
23 words
A connector as claimed in claim 7 wherein the separate positioning member engages a protuberance on the external surface of the tubular member.
Claim 11
Dependent Claim
14 words
A connector as claimed in claim 1, wherein the band is a continuous ring.
Claim 12
Dependent Claim
23 words
A connector as claimed in claim 1, wherein the inner surface of the band is contoured to facilitate its movement up the taper.
Claim 13
Dependent Claim
19 words
A connector as claimed in claim 1, wherein the angle of the tapered portion is not greater than 5°.
Claim 14
Dependent Claim
19 words
A connector as claimed in claim 12, wherein the angle of the tapered portion is from 1° to 2°.
Claim 15
Dependent Claim
18 words
A connector as claimed in claim 1, wherein the memory metal is an alloy of nickel and titanium.
Claim 16
Dependent Claim
14 words
A connector as claimed in claim 1, wherein the memory metal is a brass.
Claim 17
Dependent Claim
14 words
A connector as claimed in claim 1, wherein the memory metal has been preconditioned.
References Cited (Backward Citations)
US418752A
Cited
FR791491A
Cited
GB447094A
Cited
US2917822A
Cited
US3139468A
Cited
GB1126711A
Cited
US3262719A
Cited
GB1167779A
Cited
US3513429A
Cited
GB1232741A
Cited
US3579805A
Cited
US3498648A
Cited
US3975034A
Cited
US4035007A
Cited
US3740839A
Cited
US3888523A
Cited
US3872573A
Cited
US4070044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |