US3968898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetostrictive closure member
Assignee: Individual
•
Filing: 1974-08-26
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Granted: 1976-07-13
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Expires: 1994-08-26
Abstract
Abstract A bimetallic closure member comprised of two materials having dissimilar magnetostrictive characteristics does not require a hinge, when subjected to a magnetic field, or alternatively, when removed from a magnetic field, the materials contract or expand at different rates causing the member to bend thereby opening or closing the closure member.
Inventors
- 👤 Andrew E. Beer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:56
CPC Classifications
B; B65; B65D; B65D51/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
101 words
A magnetostrictive closure member comprising: a. a housing having an opening adapted to receive closure means; b. closure means adapted to open or close the opening in said housing; and c. a bimetallic magnetostrictive strip adapted to operate said closure means, one metallic component of said bimetallic strip being attached to said closure means and having a magnetostrictive property different from the other metallic component of said bimetallic strip, said other metallic component being attached to said housing, such that the bimetallic strip, when subjected to a change of magnetic field, operates the closure means to open or close the opening.
Claim 2
Dependent Claim
101 words
A magnetostrictive closure member comprising: a. a housing having an opening adapted to receive closure means; b. closure means adapted to open or close the opening in said housing; and c. a bimetallic magnetostrictive strip adapted to operate said closure means, one metallic component of said bimetallic strip being attached to said closure means and having a magnetostrictive property different from the other metallic component of said bimetallic strip, said other metallic component being attached to said housing, such that the bimetallic strip, when subjected to a change of magnetic field, operates the closure means to open or close the opening.
Claim 3
Dependent Claim
47 words
The magnetostrictive closure member of claim 1, wherein said bimetallic magnetostrictive strip has a predetermined curvature when not subjected to a magnetic field and said curvature changes as it becomes subject to a magnetic field with the curvature being related to the intensity of the magnetic field.
Claim 4
Dependent Claim
85 words
A magnetostrictive closure member comprising a housing having an opening adapted to receive closure means, said closure means adapted to close said opening in said housing, and a bimetallic magnetostrictive strip adapted to operate said closure means, one end of said magnetostrictive strip being attached to said closure means and the other end of said magnetostrictive strip being attached to said housing wherein the housing comprises a container used for holding objects and the closure means comprises a door which allows access to the container.
Claim 5
Dependent Claim
85 words
A magnetostrictive closure member comprising a housing having an opening adapted to receive closure means, said closure means adapted to close said opening in said housing, and a bimetallic magnetostrictive strip adapted to operate said closure means, one end of said magnetostrictive strip being attached to said closure means and the other end of said magnetostrictive strip being attached to said housing wherein the housing comprises a container used for holding objects and the closure means comprises a door which allows access to the container.
Claim 6
Dependent Claim
16 words
The magnetostrictive closure member of claim 1, further comprising magnetic means for operating said closure member.
Claim 7
Dependent Claim
15 words
The magnetostrictive closure member of claim 4, wherein said magnetic means comprises a permanent magnet.
Claim 8
Dependent Claim
14 words
The magnetostrictive closure member of claim 4, wherein said magnetic means comprises an electromagnet.
References Cited (Backward Citations)
US3638153A
Cited
US3857543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |