US3913444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally deformable fastening pin
Assignee: Raychem Corp
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Filing: 1972-11-08
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Granted: 1975-10-21
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Expires: 1992-11-08
Abstract
Abstract A fastening pin for use in connecting printed circuit boards or the like constructed of concentrically arranged split tubes or layers of material having different thermal properties. One tube is made from a heat recoverable metal alloy, that is, a metal alloy that can be caused to exhibit a decided reduction in strength and be deformed when it passes through a transition point in a first direction and a reverse change in dimension and increase in strength when it passes through the transition point in the opposite direction. The other tube is resilient and has spring like characteristics so that it has sufficient strength to move the first tube of material when the latter is in its low strength condition, and sufficient flexibility to be moved by the first tube of material when it changes dimension. The pins are formed by taking split cylinders of each material and force fitting the tube of heat recoverable metal inside the tube of spring metal. Also disclosed is a similar pin wherein two layers of heat recoverable metal are used to sandwich a layer of spring like material, and a sectionalized pin which permits substantially independent motion by different segments thereof.
Inventors
- 👤 Richard F Otte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:52
CPC Classifications
F; F16; F16B; F16B4/00; F16B4/006; F16B4/008; F16B19/00; F16B19/002; F16B19/004; H; H01; H01R; H01R13/00; H01R13/02; H01R13/04; H01R13/05; H01R13/052; H01R4/00; H01R4/01; F16B2200/00; F16B2200/77; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10S411/00; Y10S411/909; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T29/49208; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
95 words
A fastening pin comprising: first and second separate tubular members, telescoped together and in intimate contact, each tubular member having a longitudinal slit through the wall thereof, one of said members comprising heat recoverable metal having a transition temperature and the other of said members comprising spring metal, said member comprised of spring metal being under stress when said member comprised of heat recoverable metal is in the heat Recovered condition, said stress being capable of exerting sufficient force to cause dimensional change in said heat recoverable member when it is below its transition temperature.
Claim 2
Dependent Claim
95 words
A fastening pin comprising: first and second separate tubular members, telescoped together and in intimate contact, each tubular member having a longitudinal slit through the wall thereof, one of said members comprising heat recoverable metal having a transition temperature and the other of said members comprising spring metal, said member comprised of spring metal being under stress when said member comprised of heat recoverable metal is in the heat Recovered condition, said stress being capable of exerting sufficient force to cause dimensional change in said heat recoverable member when it is below its transition temperature.
Claim 3
Dependent Claim
15 words
The pin of claim 1 wherein said heat recoverable metal comprises a titanium nickel alloy.
Claim 4
Dependent Claim
15 words
The pin of claim 1 wherein said heat recoverable metal comprises a beta brass alloy.
Claim 5
Dependent Claim
14 words
The pin of claim 2 wherein said spring metal comprises a beryllium copper alloy.
Claim 6
Dependent Claim
18 words
The pin of claim 1 wherein the member comprising heat recoverable metal is positioned inside the other member.
Claim 7
Dependent Claim
18 words
The pin of claim 1 wherein the member comprising heat recoverable metal is positioned outside the other member.
Claim 8
Dependent Claim
28 words
The pin of claim 1 wherein a third tubular member is positioned over said first and second tubular members, said third tubular member comprising a heat recoverable metal.
Claim 9
Dependent Claim
16 words
The pin of claim 1 wherein said members are provided with one or more circumferential slots.
Claim 10
Dependent Claim
131 words
A fastening pin comprising: a first hollow cylindrical member being split along its length; a separate second hollow cylindrical member being split along its length and being positioned over and in intimate contact with the first member; the first member comprising a heat recoverable metal having a transition temperature and the second member comprising spring metal whereby the first member determines the lateral dimension of the device when it is heated to above the transition temperature of the metal of the first member, said second member being under stress when said first member is in the heat recovered condition, and the second member stresses the first member and determines the lateral dimension of the device when it is cooled to below the transition temperature of the metal of the first member.
Claim 11
Dependent Claim
131 words
A fastening pin comprising: a first hollow cylindrical member being split along its length; a separate second hollow cylindrical member being split along its length and being positioned over and in intimate contact with the first member; the first member comprising a heat recoverable metal having a transition temperature and the second member comprising spring metal whereby the first member determines the lateral dimension of the device when it is heated to above the transition temperature of the metal of the first member, said second member being under stress when said first member is in the heat recovered condition, and the second member stresses the first member and determines the lateral dimension of the device when it is cooled to below the transition temperature of the metal of the first member.
Claim 12
Dependent Claim
13 words
The pin of claim 1 wherein said slits are at least partially aligned.
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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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |