US4883248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shock preventing apparatus
Assignee: Alps Alpine Co Ltd
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Filing: 1988-09-15
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Granted: 1989-11-28
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Expires: 2008-09-15
Abstract
Abstract In a vibration preventing apparatus, there are provided a supporting plate on which an object to be supported is mounted; and a member fixed on the supporting plate, for supporting the supporting plate. In this apparatus, a piezoelectric effect element, to which electrodes a resistor is connected, is attached to a surface of the supporting plate. This piezoelectric effect element is a bimorph.
Inventors
- 👤 Kenji Uchino
- 👤 Kazumasa Ohnishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:08
CPC Classifications
G; G12; G12B; G12B3/00; F; F16; F16F; F16F15/00; F16F15/005
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
86 words
A vibration preventing apparatus comprising: a supporting plate on which an object to be supported is mounted; and a member fixed on said supporting plate, for supporting said supporting plate, wherein: a piezoelectric effect element, to which electrodes a resistor having a predetermined resistance is connected, wherein the resistance of the resistor is selected such that a substantial amount of vibration energy received by the piezoelectric effect element is converted to heat energy, the piezoelectric effect element being attached to a surface of said supporting plate.
Claim 2
Dependent Claim
86 words
A vibration preventing apparatus comprising: a supporting plate on which an object to be supported is mounted; and a member fixed on said supporting plate, for supporting said supporting plate, wherein: a piezoelectric effect element, to which electrodes a resistor having a predetermined resistance is connected, wherein the resistance of the resistor is selected such that a substantial amount of vibration energy received by the piezoelectric effect element is converted to heat energy, the piezoelectric effect element being attached to a surface of said supporting plate.
Claim 3
Dependent Claim
17 words
A vibration preventing apparatus as claimed in claim 1, wherein said piezoelectric effect element is a bimorph.
Claim 4
Dependent Claim
33 words
A vibration preventing apparatus as claimed in claim 1, wherein said piezoelectric effect element is a bimorph, having a capacitance of approximately 60nF, and said resistor has a resistance of approximately 8.8 kΩ.
Claim 5
Dependent Claim
97 words
A shock attenuating apparatus comprising: a body through which vibration energy may be transferred, a piezoelectric effect element coupled to the body for receiving and converting at least a portion of the vibration energy transferred through the body to electrical energy; and a resistor having a predetermined resistance operatively coupled to the piezoelectric effect element, to convert the electrical energy generated by the piezoelectric effect element to heat energy, wherein the resistance of the resistor is selected such that a substantial amount of the vibration energy received by the piezoelectric effect element is converted into heat energy.
Claim 6
Dependent Claim
97 words
A shock attenuating apparatus comprising: a body through which vibration energy may be transferred, a piezoelectric effect element coupled to the body for receiving and converting at least a portion of the vibration energy transferred through the body to electrical energy; and a resistor having a predetermined resistance operatively coupled to the piezoelectric effect element, to convert the electrical energy generated by the piezoelectric effect element to heat energy, wherein the resistance of the resistor is selected such that a substantial amount of the vibration energy received by the piezoelectric effect element is converted into heat energy.
Claim 7
Dependent Claim
26 words
A shock attenuating apparatus according to claim 4, wherein the resistance of the resistor is selected to maximize the amount heat energy produced by the resistor.
Claim 8
Dependent Claim
54 words
A shock attenuating apparatus according to claim 4 wherein the resistance of the resistor is set at least approximately according to the formula: ##EQU4## where: R=resistance of the resistor ω=angular frequency of an alternating voltage component produced by the piezoelectric effect element C=capacitance of the piezoelectric effect element, L=inductance of the piezoelectric effect element.
Claim 9
Dependent Claim
16 words
A shock attenuating apparatus according to claim 6, wherein the piezoelectric effect element is a bimorph.
Claim 10
Dependent Claim
16 words
A shock attenuating apparatus according to claim 4, wherein the piezoelectric effect element is a bimorph.
Claim 11
Dependent Claim
30 words
A shock attenuating apparatus according to claim 4, wherein the piezoelectric effect element has a capacitance of approximately 60nF and the resistor has a resistance of between 6.6kΩ and 10kΩ.
Claim 12
Dependent Claim
26 words
A shock attenuating apparatus according to claim 4, wherein the piezoelectric effect element outputs an electrical signal component having a frequency on the order of 300Hz.
Claim 13
Dependent Claim
29 words
A shock attenuating apparatus according to claim 4, wherein the piezoelectric effect element has a capacitance of approximately 60nF and the resistor has a resistance between 1kΩ and 88kΩ.
Claim 14
Dependent Claim
70 words
A shock attenuating apparatus comprising: first energy conversion means for receiving the energy of mechanical vibrations and converting the same to electrical energy; and second energy conversion means, operatively coupled to the first means, for converting electrical energy produced by the first means into heat energy; wherein the first and second means are matched to maximize, at least approximately, the amount of mechanical energy that is converted to heat energy.
Claim 15
Dependent Claim
70 words
A shock attenuating apparatus comprising: first energy conversion means for receiving the energy of mechanical vibrations and converting the same to electrical energy; and second energy conversion means, operatively coupled to the first means, for converting electrical energy produced by the first means into heat energy; wherein the first and second means are matched to maximize, at least approximately, the amount of mechanical energy that is converted to heat energy.
Claim 16
Dependent Claim
16 words
The shock attenuating apparatus of claim 12 wherein the first means comprises a piezoelectric effect element.
Claim 17
Dependent Claim
14 words
The shock attenuating apparatus of claim 13 wherein the second means comprises a resistor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |