US3748503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezo electric motor
Assignee: Braun GmbH
•
Filing: 1971-09-10
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Granted: 1973-07-24
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Expires: 1991-09-10
Abstract
Abstract A piezo electric motor having a reciprocating mechanical output driven by a bank of piezo ceramic bending strips, one end of each bending strip being secured in a stationary bed and the other end of each bending strip being connected to a driven member which is reciprocated by the repeated flexing of the bending strips.
Inventors
- 👤 R Schofer
- 👤 C Cobarg
- 👤 H Thomann
- 👤 E Fenner
- 👤 W Heywang
- 👤 M Guntersdorfer
- 👤 F Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:40
CPC Classifications
B; B26; B26B; B26B19/00; B26B19/28; B26B19/282; A; A61; A61H; A61H23/00; A61H23/02; A61H23/0245; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0603; H; H02; H02N; H02N2/00; H02N2/02; H02N2/04; H02N2/043; H10; H10N; H10N30/00; H10N30/20; H10N30/204; H10N30/2041; H10N30/2042; H10N30/2043; H04; H04R; H04R17/00; H04R17/04; H04R17/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
174 words
A piezo electric motor for generating substantially rectilinear stroke movements of a first driven member comprising: a base member; a member to be driven; a plurality of piezo electric bending strips arranged in two packages with their respective strips substantially parallel to each other; means securing said packages of strips to said base member with one package offset longitudinally with respect to the other, whereby one package of bending strips extends out beyond the other package; an intermediate coupling bar; a transmission member connecting said intermediate coupling bar to said member to be driven; the ends of said bending strips remote from said base member of said one of said packages being secured to one end of said coupling bar; a second driven member; the ends of said remaining bending strips being connected to said second driven member; a support pin carried by said base member; and a rockable arm pivoted at its center on said pin and having its opposite ends rockably engaged by said intermediate coupling bar and said second driven member.
Claim 2
Dependent Claim
174 words
A piezo electric motor for generating substantially rectilinear stroke movements of a first driven member comprising: a base member; a member to be driven; a plurality of piezo electric bending strips arranged in two packages with their respective strips substantially parallel to each other; means securing said packages of strips to said base member with one package offset longitudinally with respect to the other, whereby one package of bending strips extends out beyond the other package; an intermediate coupling bar; a transmission member connecting said intermediate coupling bar to said member to be driven; the ends of said bending strips remote from said base member of said one of said packages being secured to one end of said coupling bar; a second driven member; the ends of said remaining bending strips being connected to said second driven member; a support pin carried by said base member; and a rockable arm pivoted at its center on said pin and having its opposite ends rockably engaged by said intermediate coupling bar and said second driven member.
Claim 3
Dependent Claim
47 words
A piezo electric motor according to claim 1, in which said piezo electric bending strips are energized by an alternating electric voltage, and in which the resonant frequency of mechanical oscillation of the moving parts is 1.5 to 2.0 times the frequency of said alternating electric voltage.
Claim 4
Dependent Claim
46 words
A piezo electric motor according to claim 1 in which said piezo electric bending strips are energized by an alternating electric voltage, and in which the resonant frequency of mechanical oscillation of the moving parts is substantially higher than the frequency of said alternating electric voltage.
Claim 5
Dependent Claim
195 words
A piezo electric motor for generating substantially rectilinear stroke movements of a first driven member comprising: a base member; a first driven member; a plurality of piezo electric bending strips arranged in two packages with their respective strips substantially parallel to each other; means securing said packages of strips to said base member with one package offset longitudinally with respect to the other, whereby one package of bending strips extend out beyond the other package; an intermediate coupling bar; the ends of said bending strips remote from said base member of said one of said packages being secured to said coupling bar; a second driven member; the ends of said remaining bending strips being connected to said second driven member; a support pin carried by said base member; a rockable arm pivoted at its center to said pin and having its opposite ends rockably engaged by said coupling bar and said second driven member; said second driven member being coupled to said first driven member through said rockable arm and said intermediate coupling bar, and whereas said first driven member is connected to the coupling bar at a side facing away from the base member.
Claim 6
Dependent Claim
195 words
A piezo electric motor for generating substantially rectilinear stroke movements of a first driven member comprising: a base member; a first driven member; a plurality of piezo electric bending strips arranged in two packages with their respective strips substantially parallel to each other; means securing said packages of strips to said base member with one package offset longitudinally with respect to the other, whereby one package of bending strips extend out beyond the other package; an intermediate coupling bar; the ends of said bending strips remote from said base member of said one of said packages being secured to said coupling bar; a second driven member; the ends of said remaining bending strips being connected to said second driven member; a support pin carried by said base member; a rockable arm pivoted at its center to said pin and having its opposite ends rockably engaged by said coupling bar and said second driven member; said second driven member being coupled to said first driven member through said rockable arm and said intermediate coupling bar, and whereas said first driven member is connected to the coupling bar at a side facing away from the base member.
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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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |