Patent US3753304A successfully refreshed from Google Patents.
US3753304A
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US
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Pressure wave generator
Assignee: Energy Sciences Inc
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Filing: 1971-02-02
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Granted: 1973-08-21
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Expires: 1991-02-02
Abstract
Abstract First and second shock wave generating cells are separated by a first resonant cavity. Third and fourth shock wave generating cells are arranged transverse to the first and second cells at opposite sides of and in communication with the first cavity. The shock waves from the cells collide in the first cavity. A second resonant cavity, which is terminated by a reflective strip of material, communicates with the outlet of the second cell. A plurality of cubicle auxiliary resonant cavities are formed around the side of the second cavity to intersect the plane in which the strip lies. A fifth shock wave generating cell is arranged transverse to the second cell in communication with the second cavity. Preferably, the shock waves generated by all the cells and the dimensions of the cavities are multiply related.
Inventors
- 👤 N Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:23
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/023; F15; F15C; F15C1/00; F15C1/14; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2164; Y10T137/2169; Y10T137/218; Y10T137/2191
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
232 words
A pressure wave generator comprising: a first boundary layer formed shock wave generating cell having an outlet disposed about a longitudinal axis, the first cell producing at its outlet shock waves having a predetermined wavelength and a vertex that propagates along the longitudinal axis; a second boundary layer formed shock wave generating cell having an outlet disposed about an axis transverse to and intersecting the longitudinal axis, the second cell producing at its outlet shock waves having a predetermined wavelength and a vertex that propagates along the transverse axis; an enclosure forming a passage along the longitudinal axis, the outlets of the first and second cells being coupled to the passage so the shock waves produced by the first and second cells collide in the longitudinal passage at the point of intersection of the axes; the distance along the longitudinal axis between the outlet of the first cell and the point of intersection of the axes, along the transverse axis between the outlet of the second cell and the point of intersection of the axes, and the predetermined wavelengths of the shock wqves produced by the first and second cells all being multiples of a common divisor; and a reflective strip of material extending diametrically across the passage in the path of the shock waves produced by the first cell, exits being formed by the spaces between the strip and the passage.
Claim 2
Dependent Claim
232 words
A pressure wave generator comprising: a first boundary layer formed shock wave generating cell having an outlet disposed about a longitudinal axis, the first cell producing at its outlet shock waves having a predetermined wavelength and a vertex that propagates along the longitudinal axis; a second boundary layer formed shock wave generating cell having an outlet disposed about an axis transverse to and intersecting the longitudinal axis, the second cell producing at its outlet shock waves having a predetermined wavelength and a vertex that propagates along the transverse axis; an enclosure forming a passage along the longitudinal axis, the outlets of the first and second cells being coupled to the passage so the shock waves produced by the first and second cells collide in the longitudinal passage at the point of intersection of the axes; the distance along the longitudinal axis between the outlet of the first cell and the point of intersection of the axes, along the transverse axis between the outlet of the second cell and the point of intersection of the axes, and the predetermined wavelengths of the shock wqves produced by the first and second cells all being multiples of a common divisor; and a reflective strip of material extending diametrically across the passage in the path of the shock waves produced by the first cell, exits being formed by the spaces between the strip and the passage.
Claim 3
Dependent Claim
44 words
The pressure wave generator of claim 1, in which at least one hexahedral resonant cavity is formed in the enclosure in communication with the passage intersecting the plane defined by the reflective strip, the sides of the cavity being multiples of the common divisor.
Claim 4
Dependent Claim
48 words
The pressure wave generator of claim 1, in which four cubicle resonant cavities are formed at 90* intervals around the enclsoure in communication with the longitudinal passage substantially in the plane defined by the reflective strip, the sides of the cavities being a multiple of the common divisor.
Claim 5
Dependent Claim
43 words
The pressure wave generator of claim 1, in which the longitudinal passage is cylindrical, the exit is a pair of semi-circular openings on either side of the strip, and the length and radius of the cylindrical passage are multiples of the common divisor.
Claim 6
Dependent Claim
31 words
The pressure wave generator of claim 4, in which the intensity of the shock waves produced by the first cell is higher than the shock waves produced by the second cell.
Claim 7
Dependent Claim
38 words
The pressure wave generator of claim 5, in which the predetermined wavelength of the shock waves produced by the first cell is a larger multiple than the predetermined wavelength of the shock waves produced by the second cell.
Claim 8
Dependent Claim
72 words
The pressure wave generator of claim 1, in which the enclosure comprises a housing that surrounds the first cell and a spacer in the housing between the first cell and the reflective strip, the passage comprises a hole through the spacer, the second cell is fixed to the side of the hoUsing, and the housing and the spacer have through them aligned radial holes that form the outlet of the second cell.
Claim 9
Dependent Claim
29 words
The pressure wave generator of claim 7, in which the mass flow rate through the second cell is more limited than the mass flow rate through the first cell.
Claim 10
Dependent Claim
178 words
A pressure wave generator comprising: a resonant cavity having a pair of spaced ends, a cylindrical side wall interconnecting the ends, and a longitudinal axis extending between the ends; first means for introducing into the cavity at one of the ends shock waves having a vertex that propagates along the longitudinal axis and having a predetermined wavelength; second means for introducing into the cavity at the side wall shock waves having a vertex that propagates along an axis transverse to and intersecting the longitudinal axis and having a predetermined wavelength, the distance between the point of introduction at the side wall and the longitudinal axis, the distance between the transverse axis and the other end of the cavity, and the predetermined wavelengths being multiples of the common divisor; a reflective strip diametrically disposed at the other end of the cavity; and an exit from the cavity at the other end for shock waves that collide at the point of intersection of the axes, the exit being formed between the strip and the adjacent portions of the side wall.
Claim 11
Dependent Claim
178 words
A pressure wave generator comprising: a resonant cavity having a pair of spaced ends, a cylindrical side wall interconnecting the ends, and a longitudinal axis extending between the ends; first means for introducing into the cavity at one of the ends shock waves having a vertex that propagates along the longitudinal axis and having a predetermined wavelength; second means for introducing into the cavity at the side wall shock waves having a vertex that propagates along an axis transverse to and intersecting the longitudinal axis and having a predetermined wavelength, the distance between the point of introduction at the side wall and the longitudinal axis, the distance between the transverse axis and the other end of the cavity, and the predetermined wavelengths being multiples of the common divisor; a reflective strip diametrically disposed at the other end of the cavity; and an exit from the cavity at the other end for shock waves that collide at the point of intersection of the axes, the exit being formed between the strip and the adjacent portions of the side wall.
Claim 12
Dependent Claim
21 words
The pressure wave generator of claim 9, in which the distance between the ends is a multiple of the common divisor.
Claim 13
Dependent Claim
30 words
The pressure wave generator of claim 9, in which the shock waves introduced at the one end have a higher momentum than the shock waves introduced at the side wall.
Claim 14
Dependent Claim
21 words
The pressure wave generator of claim 9, in which the width of the strip is a multiple of the common divisor.
Claim 15
Dependent Claim
37 words
The pressure wave generator of claim 9, in which a plurality of hexahedral auxiliary cavities are formed in the side wall at the other end, the sides of the auxiliary cavities being multiples of the common divisor.
Claim 16
Dependent Claim
118 words
The pressure wave generator of claim 13, in which the resonant cavity comprises a plurality of adjacent annular spacers and a housing surrounding the spacers, the spacers defining the side wall of the cavity; the second means for introducing shock waves into the cavity comprises a boundary layer formed shock wave generating cell fixed to the side of the housing, the housing and the spacer adjacent to the cell having through them aligned radial holes to couple the cell to the cavity, the reflective strip is fixed to one of the spacers at one end, and the auxiliary cavities are formed in another spacer at one end adjacent to the strip to intercept energy reflected from the strip.
Claim 17
Dependent Claim
114 words
A pressure wave generator comprising: an enclosure having spaced ends and a longitudinal cylindrical side wall extending between the ends about an axis; means for introducing into the enclosure at one end pressure waves having a vertex that propagates along the longitudinal axis and having a predetermined wavelength, the predetermined wavelength and the distance between the ends being multiples of a common divisor to promote resonant action in the enclosure; a reflective strip diametrically disposed at the other end; and arcuate exits from the enclosure formed at the other end by the strip and the adjacent portions of the side wall to permit pressure wave energy to leave the enclosure at the other end.
Claim 18
Dependent Claim
114 words
A pressure wave generator comprising: an enclosure having spaced ends and a longitudinal cylindrical side wall extending between the ends about an axis; means for introducing into the enclosure at one end pressure waves having a vertex that propagates along the longitudinal axis and having a predetermined wavelength, the predetermined wavelength and the distance between the ends being multiples of a common divisor to promote resonant action in the enclosure; a reflective strip diametrically disposed at the other end; and arcuate exits from the enclosure formed at the other end by the strip and the adjacent portions of the side wall to permit pressure wave energy to leave the enclosure at the other end.
Claim 19
Dependent Claim
21 words
The pressure wave generator of claim 15, in which the width of the strip is a multiple of the common divisor.
Claim 20
Dependent Claim
40 words
The pressure wave generator of claim 16, in which a plurality of hexahedral cavities are formed at the other end in communication with the energy reflected from the strip, the sides of the cavities being multiples of the common divisor.
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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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |