US4882500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for converting standing wave vibrations into motion and standing wave motor therefor
Assignee: Nippon Seimitsu Kogyo KK
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Filing: 1988-09-19
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Granted: 1989-11-21
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Expires: 2008-09-19
Abstract
Abstract Standing wave vibrations which are generated in an elastic vibration member by a vibrator can be effectively converted into a linear or rotary motion by transmitting the standing wave vibrations to a moving member through motion extracting means which are arranged on the vibration member at intervals of half wavelength of the standing wave and each located on a portion substantially exclusive of the node and loop of the standing wave. According to this method, a linear or rotary motor of high performance can be accomplished.
Inventors
- 👤 Tamotsu Iijima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:47
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/10; H02N2/103; H02N2/0005; H02N2/001; H02N2/0015; H02N2/02; H02N2/026
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
228 words
A standing wave motor which is driven by converting standing wave vibrations into motion, comprising an elastic vibration member; at least one vibrator disposed on said vibration member and adapted to generate a standing wave having a fixed wavelength in said vibration member by applying a periodic voltage of fixed frequency thereto, said vibration member having a length substantially equal to integral multiples of the half wavelength of the standing wave generated in said vibration member; at least one row of motion extracting means integrally formed on at least one surface of said vibration member in the shape of protrusions and located within at least one of the odd or even numbered sections of quarter wavelength sections defined by equally dividing each wavelength of the standing wave into four and at a portion substantially exclusive of a loop and a node of the standing wave, said motion extracting means each having a width less than quarter the wavelength of the standing wave generated in said vibration member in longitudinal direction relative to said vibration member; and at least one moving member being in contact with said motion extracting means on the vibration member thereby to cause relative motion of the vibration member and the moving member by transmitting amplitude motion of the standing wave generated in the vibration member to the moving member through the motion extracting means.
Claim 2
Dependent Claim
228 words
A standing wave motor which is driven by converting standing wave vibrations into motion, comprising an elastic vibration member; at least one vibrator disposed on said vibration member and adapted to generate a standing wave having a fixed wavelength in said vibration member by applying a periodic voltage of fixed frequency thereto, said vibration member having a length substantially equal to integral multiples of the half wavelength of the standing wave generated in said vibration member; at least one row of motion extracting means integrally formed on at least one surface of said vibration member in the shape of protrusions and located within at least one of the odd or even numbered sections of quarter wavelength sections defined by equally dividing each wavelength of the standing wave into four and at a portion substantially exclusive of a loop and a node of the standing wave, said motion extracting means each having a width less than quarter the wavelength of the standing wave generated in said vibration member in longitudinal direction relative to said vibration member; and at least one moving member being in contact with said motion extracting means on the vibration member thereby to cause relative motion of the vibration member and the moving member by transmitting amplitude motion of the standing wave generated in the vibration member to the moving member through the motion extracting means.
Claim 3
Dependent Claim
128 words
A standing wave motor according to claim 1, wherein said vibration member is formed in an annular shape whose circumferential length is substantially equal to integral multiples of the wavelength of the standing wave generated in said vibration member, said vibration is composed of a first series of piezoelectric elements having opposite polarities arranged alternately by half the wavelength of the standing wave generated in the vibration member, and a second series of piezoelectric elements having opposite polarities arranged by half the wavelength of the standing wave, said first and second series being shifted by quarter the wavelength of the standing wave, thereby to allow the moving member to selectively move in one of opposite directions by exciting one of the first and second series of piezoelectric elements.
Claim 4
Dependent Claim
132 words
A standing wave motor according to claim 1, wherein said vibrator serves as a first vibrator which is adapted to generate a first standing wave in the vibration member, and a second vibrator which is adapted to generate a second standing wave having wavelength twice that of the first standing wave is located on the vibrations member in such a state that the nodes formed every half wavelength of the second standing wave are coincident with the nodes formed every one wavelength of the first standing wave; and said motion extracting means are located as separated by integral multiples of substantially one wavelength of the first standing wave, thereby to cause the moving member to move in one of opposite directions by selectively applying a periodic voltage to one of the vibrators.
Claim 5
Dependent Claim
25 words
A standing wave motor according to claim 3, wherein said first and second vibrators are respectively attached to the opposite surfaces of the vibration member.
Claim 6
Dependent Claim
133 words
A standing wave motor according to claim 1, wherein first and second rows of said motion extracting means are arranged in parallel on said vibration member, said motion extracting means of the first row being located within the odd numbered sections of said four quarter sections and those of the second row being located within the even numbered sections of said four quarter sections; and said moving member which serves as a first moving member is brought into contact with the motion extracting means of the first row and a second moving member is brought into contact with the motion extracting means of the second row, thereby to cause the first and second moving members to move in opposite directions by exciting the vibrator to generate the standing wave in the vibration member.
Claim 7
Dependent Claim
29 words
A standing wave motor according to claim 5, wherein said first and second rows of motion extracting means are arranged in parallel on one surface of the vibration member.
Claim 8
Dependent Claim
37 words
A standing wave motor according to claim 5, wherein said vibration member assumes an annular shape and has a circumferential length substantially equal to integral multiples of the wavelength of the standing wave generated by the vibrator.
Claim 9
Dependent Claim
39 words
A standing wave motor according to claim 1, wherein a plurality of rows of the motion extracting means are arranged on the vibration member with the same phase at the same interval and have different widths in each row.
Claim 10
Dependent Claim
35 words
A standing wave motor according to claim 1, wherein said vibration member is made of an elastic rectangular bar and terminated to either end thereof at quarter the wavelength of the standing wave generated therein.
Claim 11
Dependent Claim
38 words
A standing wave motor according to claim 1, wherein said motion extracting means are located at distances of half the wavelength of the standing wave and located in all the odd numbered sections of the quarter wavelength sections.
Claim 12
Dependent Claim
38 words
A standing wave motor according to claim 1, wherein said motion extracting means are located at intervals of half the wavelength of the standing wave and located in all the even numbered sections of the quarter wavelength sections.
Claim 13
Dependent Claim
20 words
A standing wave motor according to claim 1, wherein said vibration member is fixed and said moving member is movable.
Claim 14
Dependent Claim
40 words
A standing wave motor according to claim 1, wherein one of said vibration member and moving member is fixedly disposed and the other is movably disposed so as to allow relative motion of the vibration member and the moving member.
Claim 15
Dependent Claim
202 words
A standing wave motor which is driven by converting standing wave vibrations into motion, comprising an elastic vibration member; at least one vibrator disposed on said vibration member and adapted to generate a standing wave having a fixed wavelength in said vibration member by applying a periodic voltage of fixed frequency thereto, said vibration member having a length substantially equal to integral multiples of the half wavelength of the standing wave generated in said vibration member; motion extracting means separately formed on at least one surface of said vibration member; a retainer for retaining said motion extracting means so as to locate said motion extracting means within at least one of the odd or even numbered sections of quarter wavelength sections defined by equally dividing each wavelength of the standing wave into four and at a portion substantially exclusive of a loop and a node of the standing wave; and at least one moving member being in contact with said motion extracting means on the vibration member, thereby to cause relative motion of the vibration member and the moving member by transmitting amplitude motion of the standing wave generated in the vibration member to the moving member through the motion extracting means.
Claim 16
Dependent Claim
202 words
A standing wave motor which is driven by converting standing wave vibrations into motion, comprising an elastic vibration member; at least one vibrator disposed on said vibration member and adapted to generate a standing wave having a fixed wavelength in said vibration member by applying a periodic voltage of fixed frequency thereto, said vibration member having a length substantially equal to integral multiples of the half wavelength of the standing wave generated in said vibration member; motion extracting means separately formed on at least one surface of said vibration member; a retainer for retaining said motion extracting means so as to locate said motion extracting means within at least one of the odd or even numbered sections of quarter wavelength sections defined by equally dividing each wavelength of the standing wave into four and at a portion substantially exclusive of a loop and a node of the standing wave; and at least one moving member being in contact with said motion extracting means on the vibration member, thereby to cause relative motion of the vibration member and the moving member by transmitting amplitude motion of the standing wave generated in the vibration member to the moving member through the motion extracting means.
Claim 17
Dependent Claim
50 words
A standing wave motor according to claim 14, wherein said motion extracting means are movably by quarter the wavelength of the standing wave relative to said vibration member in the longitudinal direction of the vibration member, thereby to allow the moving member to move selectively in one of opposite directions.
Claim 18
Dependent Claim
15 words
A standing wave motor according to claim 14, wherein said motion extracting means are rollers.
Claim 19
Dependent Claim
35 words
A standing wave motor according to claim 14, wherein said vibration member is made of an elastic rectangular bar and terminated to either end thereof at quarter the wavelength of the standing wave generated therein.
Claim 20
Dependent Claim
38 words
A standing wave motor according to claim 14, wherein said motion extracting means are located at distances of half the wavelength of the standing wave and located in all the odd numbered sections of the quarter wavelength sections.
Claim 21
Dependent Claim
38 words
A standing wave motor according to claim 14, wherein said motion extending means are located at intervals of half the wavelength of the standing wave and located in all the even numbered sections of the quarter wavelength sections.
Claim 22
Dependent Claim
20 words
A standing wave motor according to claim 14, wherein said vibration member is fixed and said moving member is movable.
Claim 23
Dependent Claim
21 words
A standing wave motor according to claim 14, wherein said vibration member is disposed movably and said moving member is fixed.
Claim 24
Dependent Claim
204 words
A standing wave motor which is driven by converting standing wave vibrations into motion, comprising, an elastic vibration member; at least one vibrator disposed on said vibration member and adapted to generate a standing wave having a fixed wavelength in said vibration member by applying a periodic voltage of fixed frequency thereto, said vibration member having a length substantially equal to integral multiples of the half wavelength of the standing wave generated in said vibration member; at least one row of motion extracting means separately formed on at least one surface of said vibration member and each of said motion extracting means being located within at least one of the odd or even numbered sections of quarter wavelength sections defined by equally dividing each wavelength of the standing wave into four and at a portion substantially exclusive of a loop and a node of the standing wave; and a retainer for retaining said motion extracting means in the state contacting with said vibration member, whereby said motion extracting means is driven by applying amplitude motion of the standing wave generated in the vibration member to said motion extracting means so as to extract as an output a motion imparted to said motion extracting means.
Claim 25
Dependent Claim
204 words
A standing wave motor which is driven by converting standing wave vibrations into motion, comprising, an elastic vibration member; at least one vibrator disposed on said vibration member and adapted to generate a standing wave having a fixed wavelength in said vibration member by applying a periodic voltage of fixed frequency thereto, said vibration member having a length substantially equal to integral multiples of the half wavelength of the standing wave generated in said vibration member; at least one row of motion extracting means separately formed on at least one surface of said vibration member and each of said motion extracting means being located within at least one of the odd or even numbered sections of quarter wavelength sections defined by equally dividing each wavelength of the standing wave into four and at a portion substantially exclusive of a loop and a node of the standing wave; and a retainer for retaining said motion extracting means in the state contacting with said vibration member, whereby said motion extracting means is driven by applying amplitude motion of the standing wave generated in the vibration member to said motion extracting means so as to extract as an output a motion imparted to said motion extracting means.
Claim 26
Dependent Claim
41 words
A standing wave motor according to claim 22, wherein said motion extracting means each have a width less than a quarter of the wavelength of the standing wave generated in said vibration member in longitudinal direction relative to said vibration member.
Claim 27
Dependent Claim
36 words
A standing wave motor according to claim 22, wherein said motion extracting means are movable by quarter the wavelength of the standing wave relative to said vibration member in the longitudinal direction of the vibration member.
Claim 28
Dependent Claim
38 words
A standing wave motor according to claim 22, wherein said motion extracting means are located at distances of half the wavelength of the standing wave and located in all the odd numbered sections of the quarter wavelength sections.
Claim 29
Dependent Claim
38 words
A standing wave motor according to claim 22, wherein said motion extracting means are located at intervals of half the wavelength of the standing wave and located in all the even numbered sections of the quarter wavelength sections.
Claim 30
Dependent Claim
71 words
A standing wave motor according to claim 22, wherein said motion extracting means are rollers which are retained by said retainer movable in the longitudinal direction of the vibration member, whereby said motion extracting means is rotated by applying amplitude motion of the standing wave generated in the vibration member to said motion extracting means so as to extract as an output a rotational motion produced by said motion extracting means.
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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) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |