US3816902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of magnetically shrink-fitting members
Assignee: Individual
•
Filing: 1972-09-19
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Granted: 1974-06-18
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Expires: 1992-09-19
Abstract
Abstract Magnetostrictive fastener arrangement that relies upon the fractional change in length of a ferromagnetic element under the influence of a magnetic field (magnetostriction) to alter the physical cooperating relationship between the element and a second element. Each of the elements may exhibit the same or a different magnetostrictive effect in the presence of a magnetic field, and each of the elements is dimensioned so that a different physical relationship between the elements is achieved when either or both elements undergoes a fractional change in length.
Inventors
- 👤 A Beer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:21
CPC Classifications
F; F16; F16B; F16B7/00; F16B15/00; F16B2/00; F16B2/005; F16B33/00; F16B33/008; F16B39/00; F16B4/00; F16B4/004; F16B2200/00; F16B2200/77; F16B2200/83; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10T; Y10T29/00; Y10T29/49; Y10T29/49815; Y10T29/49822; Y10T29/49824; Y10T29/49826; Y10T29/49863; Y10T29/49947; Y10T29/49948; Y10T29/49954; Y10T29/49956; Y10T29/49959; Y10T29/49963; Y10T403/00; Y10T403/48
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
84 words
A method of engaging elements in cooperating physical relationship at least one of which is formed of magnetostrictive material comprising the steps of applying a magnetic field to the magnetostrictive element to change a dimension thereof and alter the physical cooperating relationship between the elements, securing the elements together in a frictional engagement, and removing the magnetic field to cause a fractional change in a dimension of the element and provide a greater frictional engagement between the elements to lock them together more securely.
Claim 2
Independent Claim
84 words
A method of engaging elements in cooperating physical relationship at least one of which is formed of magnetostrictive material comprising the steps of applying a magnetic field to the magnetostrictive element to change a dimension thereof and alter the physical cooperating relationship between the elements, securing the elements together in a frictional engagement, and removing the magnetic field to cause a fractional change in a dimension of the element and provide a greater frictional engagement between the elements to lock them together more securely.
Claim 3
Dependent Claim
77 words
The method according to claim 1, wherein the magnetostrictive element is a nail adapted to be driven into and engage the second element in the presence of the magnetic field, the diameter of the nail decreaSing when the magnetic field is applied parallel to the axis of the nail, whereby the diameter of the nail increases in the absence of the magnetic field to provide a greater frictional locking relationship between the nail and the second element.
Claim 4
Dependent Claim
77 words
The method according to claim 1, wherein the magnetostrictive element is a screw adapted to be driven into and engage the second element in the presence of the magnetic field, the diameter of the screw decreasing when the magnetic field is applied parallel to the axis of the screw, whereby the diameter of the screw increases in the absence of the magnetic field to provide a greater frictional locking relationship between the screw and the second element.
Claim 5
Dependent Claim
75 words
The method according to claim 1, wherein the magnetostrictive element is a rivet adapted to be formed into engagement with other elements in the presence of the magnetic field, the diameter of the rivet decreasing when the magnetic field is applied parallel to the axis of the rivet and whereby the diameter of the rivet increases in the absence of the magnetic field to provide a tighter engagement between the rivet and the other elements.
Claim 6
Dependent Claim
77 words
The method according to claim 1, wherein the magnetostrictive element is a stud adapted to be inserted into and engage other elements in the presence of the magnetic field, the diameter of the stud decreasing when the magnetic field is applied generally parallel to the axis of the stud, whereby the diameter of the stud increases in the absence of the magnetic field to provide a greater frictional locking relationship between the stud and the other elements.
Claim 7
Dependent Claim
67 words
The method according to claim 1, wherein the magnetostrictive element is a pipe adapted to be inserted into another pipe having a coupling section, the diameter of the pipe decreasing when the magnetic field is applied parallel to the axis of the pipe whereby the diameter of the pipe increases in the absence of the magnetic field to provide a greater frictional locking relationship between the pipes.
Claim 8
Dependent Claim
79 words
The method according to claim 1, wherein the magnestrictive element is a bolt and another element is a nut, the bolt adapted to engage the nut in the presence of the magnetic field, the diameter of the bolt decreasing when the magnetic field is applied parallel to the axis of the bolt, whereby the diameter of the bolt increases in the absence of the magnetic field to provide a greater frictional locking relationship between the bolt and the nut.
Claim 9
Dependent Claim
79 words
The method according to claim 1, wherein the magnetostrictive element is a bar and another element is a fitting, the bar adapted to engage the fitting in the presence of the magnetic field, the diameter of the bar decreasing when the magnetic field is applied parallel to the axis of the bar, whereby the diameter of the bar increases in the absence of the magnetic field to provide a greater frictional locking relationship between the fitting and the bar.
Claim 10
Dependent Claim
85 words
The method according to claim 1 wherein the magnetostrictive element comprises a clutch formed with a receiving hole and another element comprises a machine tool, the machine tool adapted to engage the receiving hole of the chuck in the presence of the magnetic field, the receiving hole increasing in size when the magnetic field is applied, whereby the size of the receiving hole decreases in the absence of the magnetic field to provide a greater frictional locking relationship between the chuck and the machine tool.
Claim 11
Dependent Claim
82 words
The method according to claim 1, wherein the magnetostrictive element comprises a machine tool and another element comprises a chuck formed with a receiving hole, the machine tool adapted to be engaged by the receiving hole in the chuck, the dimensions of the tool decreasing when the magnetic field is applied to the tool, whereby the dimensions of the tool increases in the absence of the magnetic field to provide a greater frictional locking relationship between the machine tool and the chuck.
Claim 12
Dependent Claim
81 words
The method according to claim 1, wherein tHe magnetostrictive element comprises a door having a lining made of magnetostrictive material formed around the perimter of the door and another element comprises a wall having an opening for the door, the size of the door decreasing when the magnetic field is applied to the door, whereby the size of the door increases in the absence of the magnetic field to provide a greater frictional locking relationship between the door and the wall.
Claim 13
Dependent Claim
68 words
The method according to claim 1, wherein the magnetostrictive element comprises a wall with an opening having a lining made of magnetostrictive material and another element comprises a door, the size of the opening increasing when the magnetic field is applied to the lining, whereby the opening decreases in the absence of the magnetic field to provide a greater frictional locking relationship between the door and the wall.
Claim 14
Dependent Claim
78 words
The method according to claim 1, wherein the magnetostrictive element comprises a washer, another element comprises a bolt adapted to be mounted within the washer and another element comprises a receiving member having an aperture, the size of the washer decreasing when the magnetic field is applied to the washer, whereby the size of the washer increases in the absence of the magnetic field to provide a greater frictional locking relationship between the bolt and the receiving member.
Claim 15
Dependent Claim
79 words
The method according to claim 1, wherein the magnetostrictive element comprises a normally curved cotter pin, partially formed of a magnetostrictive material, and another element comprises a receiving part having an aperture, the pin becoming straight when the magnetic field is applied to the magnetostrictive material of the cotter pin, whereby the length of the pin curves in the absence of the magnetic field to provide a greater frictional locking relationship between the cotter pin and the receiving part.
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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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |