US3781955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a piezoelectric element
Assignee: Individual
•
Filing: 1971-12-15
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Granted: 1974-01-01
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Expires: 1991-12-15
Abstract
Abstract The present invention relates to the instrument manufacturing industry and, more particularly, the invention relates to piezoelectric elements made in the form of a spiral, to the method of their making and to apparatus that make use of said elements, for example piezoelectric relays, piezoelectric trigger devices, a clock with a piezoelectric drive, piezoelectric stepby-step motors, measuring instruments with a piezoelectric element, piezoelectric transfilters, piezoelectric bells and piezoelectric dynamic loudspeakers. The double-layer spiral piezoelectric element includes a piezoceramic material (1), electrodes on the outer surface (2) and the inner surface (3) of the spiral, terminals (4) and (5), a support (6) for mounting the piezoelectric element, a massive base (7), an electrode (8) between the two layers of the piezoelectric material and an electrode (9).
Inventors
- 👤 V Khraschevsky
- 👤 V Lavrinenko
- 👤 A Miroshnichenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:22
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/54; H03H9/545; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; G; G04; G04C; G04C3/00; G04C3/08; G04C3/12; G04D; G04D3/00; G04D3/0002; G04D3/0035; G04D3/0074; G04D3/0089; H01; H01H; H01H57/00; H02; H02N; H02N2/00; H02N2/10; H03H9/02; H03H9/05; H03H9/10; H03H9/1007; H03H9/15; H03H9/17; H03H9/176; H03H9/56; H03H9/562; H03H9/58; H03H9/581; H10; H10N; H10N30/00; H10N30/01; H10N30/08; H10N30/09; H10N30/093; H10N30/097; H10N30/20; H10N30/40; H01H2057/003; Y; Y10; Y10T; Y10T29/00; Y10T29/42; Y10T29/43; Y10T29/49; Y10T29/4981; Y10T29/49812
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A method of making a single-layer piezoelectric element in the form of a ribbon-shaped close-coiled spiral, which comprises: a. laying one unfired piezoelectric ribbon upon another unfired piezoceramic ribbon, one of said ribbons containing in the composition thereof a substance based on oxides sintered at a temperature of 900* to 1300*C and an organic substance, the other ribbon containing in the composition thereof a substance based on oxides sintered at a temperature of 1350* to 1400*C; b. coiling the ribbons into a spiral; c. firing the ribbons at a temperature of 900 to 1300*C; d. cooling the spiral structure; and e. removing the substance based on oxides sintered at a temperature of 1350* to 1400*C from the gaps between the turns of the spiral.
Claim 2
Independent Claim
124 words
A method of making a single-layer piezoelectric element in the form of a ribbon-shaped close-coiled spiral, which comprises: a. laying one unfired piezoelectric ribbon upon another unfired piezoceramic ribbon, one of said ribbons containing in the composition thereof a substance based on oxides sintered at a temperature of 900* to 1300*C and an organic substance, the other ribbon containing in the composition thereof a substance based on oxides sintered at a temperature of 1350* to 1400*C; b. coiling the ribbons into a spiral; c. firing the ribbons at a temperature of 900 to 1300*C; d. cooling the spiral structure; and e. removing the substance based on oxides sintered at a temperature of 1350* to 1400*C from the gaps between the turns of the spiral.
Claim 3
Dependent Claim
58 words
The method of claim 1 further including the steps of immersing the spiral into a liquid paste containing salts or oxides of metals, removing the spiral from the liquid, drying the spiral, firing the spiral at a reducing temperature to obtain the metals from the salts or oxides thereof, and removing the extra metallic coating from the spiral.
Claim 4
Dependent Claim
48 words
The method of claim 1 wherein sections of the ribbon containing a substance based on oxides sintered at a temperature of 900* to 1300*C are coated with a film of a paste of salts or oxides of a metal, prior to laying the ribbons one upon the other.
Claim 5
Dependent Claim
14 words
The method of claim 3 wherein the metal employed in the paste is platinum.
Claim 6
Independent Claim
157 words
A method of making a double-layer piezoelectric element in the form of a ribbon-shaped close-coiled spiral, which comprises: a. coating two unfired piezoceramic ribbons with a film of a paste of salts or oxides of a metal, each of said ribbons containing in the composition thereof a substance based on oxides sintered at a temperature of 900* to 1300*C and an organic substance; b. laying the two ribbons one upon the other; c. pressing the ribbons together; d. laying on the pressed ribbons a third unfired piezoceramic ribbon, said third ribbon containing in the composition thereof a substance based on oxides sintered at a temperature of 1350* to 1400*C; e. coiling the ribbons into a spiral; f. firing the ribbons at a temperature of 900* to 1300*C; g. cooling the spiral structure; and h. removing the substance based on oxides sintered at a temperature of 1350* to 1400*C from the gaps between the turns of the spiral.
Claim 7
Independent Claim
157 words
A method of making a double-layer piezoelectric element in the form of a ribbon-shaped close-coiled spiral, which comprises: a. coating two unfired piezoceramic ribbons with a film of a paste of salts or oxides of a metal, each of said ribbons containing in the composition thereof a substance based on oxides sintered at a temperature of 900* to 1300*C and an organic substance; b. laying the two ribbons one upon the other; c. pressing the ribbons together; d. laying on the pressed ribbons a third unfired piezoceramic ribbon, said third ribbon containing in the composition thereof a substance based on oxides sintered at a temperature of 1350* to 1400*C; e. coiling the ribbons into a spiral; f. firing the ribbons at a temperature of 900* to 1300*C; g. cooling the spiral structure; and h. removing the substance based on oxides sintered at a temperature of 1350* to 1400*C from the gaps between the turns of the spiral.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |