US5334902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostrictive effect device
Assignee: NEC Corp
•
Filing: 1993-05-07
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Granted: 1994-08-02
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Expires: 2013-05-07
Abstract
Abstract An electrostrictive effect element is enclosed by a hermetic terminal, a thin-film metallic case, and a metallic member so as to weld the terminal onto the case and the case onto the member. The obtained unit is installed in a thick-film metallic case with sliding members such as O-shaped rings disposed between the unit and the case, thereby forming an electrostrictive effect device. Moreover, to facilitate installation of the device in an apparatus, a screw groove is disposed on a side surface at least at a location near an end surface of the thick-film case. The structure removes the disadvantage that a leakage occurs in the hermetic state due to a flaw caused on the thin-film case, for example, by a blow. Moreover, when installing the device in an apparatus, the user may grasp the device on the side surface thereof, which improves operability of the device in the installation thereof.
Inventors
- 👤 Takayuki Inoi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:45
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/80; H10N30/88; H10N30/50
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
63 words
An electrostrictive effect device, comprising: a multi-layer element in which electrostrictive effect ceramic layers and inner electrode conductive layers are alternately accumulated thereonto; a thin-film case formed of a thin metallic film and a metallic member, the film and the member hermetically sealing up the multi-layer element; sliding members disposed around the thin-film case; and a thick-film case disposed around the sliding members.
Claim 2
Dependent Claim
63 words
An electrostrictive effect device, comprising: a multi-layer element in which electrostrictive effect ceramic layers and inner electrode conductive layers are alternately accumulated thereonto; a thin-film case formed of a thin metallic film and a metallic member, the film and the member hermetically sealing up the multi-layer element; sliding members disposed around the thin-film case; and a thick-film case disposed around the sliding members.
Claim 3
Dependent Claim
25 words
A device in accordance with claim 1, wherein each of the sliding members is an O-shaped ring formed of vinyl chloride, silicon, or Teflon polytetrafluroethylene.
Claim 4
Dependent Claim
22 words
A device in accordance with claim 1, wherein each of the sliding members is a grease made of silicon, or Teflon polytetrafluroethylene.
Claim 5
Dependent Claim
26 words
A device in accordance with claim 1, wherein the thick-film case has a screw groove on a side surface thereof at least at an end thereof.
Claim 6
Dependent Claim
29 words
A device in accordance with claim 1, wherein the thick-film case possesses at least two flat planar portions on a side surface thereof, the planar portions opposing each other.
Claim 7
Dependent Claim
29 words
A device in accordance with claim 1, wherein the thick-film case includes at least one screw groove on a side surface thereof formed in a direction of thickness thereof.
Claim 8
Dependent Claim
31 words
A device in accordance with claim 4, wherein the screw groove is disposed on an inner circumferential surface of the thick-film case at an upper end and a lower end thereof.
Claim 9
Dependent Claim
31 words
A device in accordance with claim 4, wherein the screw groove is disposed on an outer circumferential surface of the thick-film case at an upper end and a lower end thereof.
Claim 10
Dependent Claim
44 words
A device in accordance with claim 4, wherein a screw groove is disposed on an outer circumferential surface of the thick-film case at an upper end thereof and a screw groove is disposed on an inner circumferential surface thereof at a lower end thereof.
Claim 11
Dependent Claim
44 words
A device in accordance with claim 4, wherein a screw groove is disposed on an inner circumferential surface of the thick-film case at an upper end thereof and a screw groove is disposed on an outer circumferential surface thereof at a lower end thereof.
Claim 12
Dependent Claim
20 words
A device in accordance with claim 1, wherein the thick-film case has a bottom portion at a lower end thereof.
Claim 13
Dependent Claim
20 words
A device in accordance with claim 10, wherein the thick-film case has a bottom portion at a lower end thereof.
Claim 14
Dependent Claim
16 words
A device in accordance with claim 1, wherein the thick-film case is made of a metal.
References Cited (Backward Citations)
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US4909440A
Cited
US5113108A
Cited
US5239223A
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US5208506A
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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) | 1997-08-01 | 1998-01-31 | 1998-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-01 | 2002-01-31 | 2002-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-01 | 2006-01-31 | 2006-08-02 | $7700.00 | Window Closed / Lapsed |