US5142919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetostriction type stress detector
Assignee: Mitsubishi Electric Corp
•
Filing: 1990-05-24
•
Granted: 1992-09-01
•
Expires: 2010-05-24
Abstract
Abstract A magnetostriction type stress detector including a passive member to which an external force is applied, which passive member is formed of a magnetic material; a magnetic shielding member provided around the passive member, which magnetic shielding member is formed with a plurality of slits; and a detection coil provided around the magnetic shielding member for detecting a change in magnetic permeability due to a stress in the passive member to be generated by the external force, through the slits of the magnetic shielding member.
Inventors
- 👤 Hiroshi Satoh
- 👤 Yoshihiko Utsui
- 👤 Katsuhiko Honda
- 👤 Masahiko Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:56
CPC Classifications
G; G01; G01L; G01L3/00; G01L3/02; G01L3/04; G01L3/10; G01L3/101; G01L3/102
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
104 words
A magnetostriction type stress detector, comprising: a passive member to which an external force is applied, said passive member being formed of a magnetic material; a magnetic shielding member provided around said passive member, said magnetic shielding member being formed with a plurality of slits; and a detection coil provided around said magnetic shielding member for detecting a change in magnetic permeability due to a stress in said passive member generated by said external force, through said slits of said magnetic shielding member, wherein said magnetic shielding member is located in contact with or in proximity to said passive member under an unbonded condition.
Claim 2
Dependent Claim
104 words
A magnetostriction type stress detector, comprising: a passive member to which an external force is applied, said passive member being formed of a magnetic material; a magnetic shielding member provided around said passive member, said magnetic shielding member being formed with a plurality of slits; and a detection coil provided around said magnetic shielding member for detecting a change in magnetic permeability due to a stress in said passive member generated by said external force, through said slits of said magnetic shielding member, wherein said magnetic shielding member is located in contact with or in proximity to said passive member under an unbonded condition.
Claim 3
Dependent Claim
26 words
The magnetostriction type stress detector according to claim 1, wherein said magnetic shielding member is formed of a nonmagnetic or diamagnetic material having a high conductivity.
Claim 4
Dependent Claim
32 words
The magnetostriction type stress detector according to claim 1, wherein said passive member is formed at its outer circumference with a recess, and said magnetic shielding member is received in said recess.
Claim 5
Dependent Claim
98 words
A magnetostriction type stress detector, comprising: a passive member to which an external force is applied, said passive member being formed of a magnetic material; a magnetic shielding member provided around said passive member, said magnetic shielding member being formed with a plurality of slits; and a detection coil provided around said magnetic shielding member for detecting a change in magnetic permeability due to a stress in said passive member generated by said external force, through said slits of said magnetic shielding member, wherein said detection coil is fixed to an outer circumference of said magnetic shielding member.
Claim 6
Dependent Claim
98 words
A magnetostriction type stress detector, comprising: a passive member to which an external force is applied, said passive member being formed of a magnetic material; a magnetic shielding member provided around said passive member, said magnetic shielding member being formed with a plurality of slits; and a detection coil provided around said magnetic shielding member for detecting a change in magnetic permeability due to a stress in said passive member generated by said external force, through said slits of said magnetic shielding member, wherein said detection coil is fixed to an outer circumference of said magnetic shielding member.
Claim 7
Dependent Claim
26 words
The magnetostriction type stress detector according to claim 4, wherein said magnetic shielding member is formed of a nonmagnetic or diamagnetic material having a high conductivity.
Claim 8
Dependent Claim
115 words
A magnetostriction type stress detector, comprising: a passive member to which an external force is applied, said passive member being formed of a magnetic material; a magnetic shielding member provided around said passive member, said magnetic shielding member being formed with a plurality of slits; and a detection coil provided around said magnetic shielding member for detecting a change in magnetic permeability due to a stress in said passive member generated by said external force, through said slits of said magnetic shielding member, wherein said magnetic shielding member comprises a magnetic shielding plate coated with a solder plating, and said magnetic shielding plate is mounted on an outer circumference of said passive member by soldering.
Claim 9
Dependent Claim
115 words
A magnetostriction type stress detector, comprising: a passive member to which an external force is applied, said passive member being formed of a magnetic material; a magnetic shielding member provided around said passive member, said magnetic shielding member being formed with a plurality of slits; and a detection coil provided around said magnetic shielding member for detecting a change in magnetic permeability due to a stress in said passive member generated by said external force, through said slits of said magnetic shielding member, wherein said magnetic shielding member comprises a magnetic shielding plate coated with a solder plating, and said magnetic shielding plate is mounted on an outer circumference of said passive member by soldering.
References Cited (Backward Citations)
GB1369404A
Cited
US3861206A
Cited
US4414855A
Cited
US4784003A
Cited
US4823620A
Cited
DE3624846A1
Cited
US4823617A
Cited
US5022275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-01 | 1996-03-02 | 1996-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-01 | 2000-03-02 | 2000-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-01 | 2004-03-02 | 2004-09-01 | $7700.00 | Window Closed / Lapsed |