Patent US5087247A successfully refreshed from Google Patents.
Patent US3790079A successfully refreshed from Google Patents.
US3790079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for generating monodisperse aerosol
Assignee: RNB ASS Inc
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Filing: 1972-06-05
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Granted: 1974-02-05
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Expires: 1992-06-05
Abstract
Abstract A vibrating orifice monodisperse aerosol generator usable as a basic aerosol standard having a liquid feed system, a droplet generator, a droplet dispersion system and an aerosol flow system. The liquid feed system is a syringe pump operable to feed liquid into the droplet generator. The liquid is discharged from the droplet generator through a small orifice as a liquid jet. The jet disturbed at a constant frequency with an oscillating piezoelectric ceramic breaks up into uniform droplets. The droplets are dispersed by a turbulent air jet and diluted into a monodispersed aerosol.
Inventors
- 👤 R Berglund
- 👤 B Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:05
CPC Classifications
B; B05; B05B; B05B17/00; B05B17/04; B05B17/06; B05B17/0607
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
106 words
An aerosol generator comprising: housing means having at least one outlet hole, an apparatUs for generating liquid droplets mounted on said housing means, said apparatus having a discharge orifice generally axially aligned with said hole and spaced from said hole, said housing means including means providing a chamber between the apparatus and the outlet hole, means for supplying the apparatus with liquid under pressure whereby the apparatus generates droplets, and means operable to provide air under pressure into the chamber whereby droplets emanating from the apparatus into the chamber are dispersed into the air and discharged with the air from the chamber through the outlet hole.
Claim 2
Dependent Claim
106 words
An aerosol generator comprising: housing means having at least one outlet hole, an apparatUs for generating liquid droplets mounted on said housing means, said apparatus having a discharge orifice generally axially aligned with said hole and spaced from said hole, said housing means including means providing a chamber between the apparatus and the outlet hole, means for supplying the apparatus with liquid under pressure whereby the apparatus generates droplets, and means operable to provide air under pressure into the chamber whereby droplets emanating from the apparatus into the chamber are dispersed into the air and discharged with the air from the chamber through the outlet hole.
Claim 3
Dependent Claim
29 words
The generator of claim 1 wherein: the apparatus for genereating liquid droplets includes means operable to vibrate the apparatus at a frequency whereby substantially equal size droplets are produced.
Claim 4
Dependent Claim
19 words
The generator of claim 2 wherein: said means to vibrate the apparatus is an annular means of piezoelectric material.
Claim 5
Dependent Claim
44 words
The generator of claim 1 including: means to apply a constant frequency AC voltage to said apparatus to vibrate the apparatus whereby the jet of liquid moving from the orifice breaks into substantially equal size droplets related to the frequency of the AC voltage.
Claim 6
Dependent Claim
50 words
The generator of claim 1 wherein: said apparatus for generating liquid droplets includes housing means having a first member with a first passage and a second member having an outlet opening attached to the first member, and means having an orifice located between the first member and the second member.
Claim 7
Dependent Claim
31 words
The generator of claim 5 including: an annular member engageable with said first member and said means having an orifice to position said means having an orifice on said housing means.
Claim 8
Dependent Claim
13 words
The generator of claim 6 wherein: the annular member is a resilient O-ring.
Claim 9
Dependent Claim
80 words
The generator of claim 1 in combination with: a porous support means, tube means having a chamber extended from said support means for receiving aerosol from the generator, said generator being mounted on said porous support means within said tube means with the outlet hole positioned to direct aerosol into the chamber of the tube means, and means to supply air to said porous support means whereby said air transports the dispersed droplets in the chamber of the tube means.
Claim 10
Dependent Claim
41 words
The aerosol generator of claim 8 wherein: said generator is located generally along the longitudinal axis of the tube means and on the support means so that a substantially uniform cylindrical core of air surrounds the generator and aerosol discharged therefrom.
Claim 11
Dependent Claim
37 words
The generator of claim 1 wherein: the housing means has a side wall surrounding a chamber, said apparatus for generating liquid droplets being located in said chamber, and resilient means mounting said apparatus on said side wall.
Claim 12
Dependent Claim
21 words
The generator of claim 10 wherein: the resilient means is an annular O-ring surrounding and engaging the apparatus and side wall.
Claim 13
Independent Claim
91 words
An apparatus usable with a source of liquid under pressure to generate droplets comprising: housing means having a passageway, an inlet opening, and an outlet opening in communication with the passageway, disc means having an orifice mounted on said housing means, said orifice being open to liquid from said passageway whereby a jet of liquid is discharged from the orifice, means secured to the housing means operable to vibrate the disc means at a frequency that breaks up the jet of liquid moving from the orifice into substantially equal size droplets.
Claim 14
Independent Claim
91 words
An apparatus usable with a source of liquid under pressure to generate droplets comprising: housing means having a passageway, an inlet opening, and an outlet opening in communication with the passageway, disc means having an orifice mounted on said housing means, said orifice being open to liquid from said passageway whereby a jet of liquid is discharged from the orifice, means secured to the housing means operable to vibrate the disc means at a frequency that breaks up the jet of liquid moving from the orifice into substantially equal size droplets.
Claim 15
Dependent Claim
20 words
The apparatus of claim 12 wherein: said means secured to the housing means is an annular member of piezoelectric material.
Claim 16
Dependent Claim
16 words
The apparatus of claim 13 wherein: said material of the annular member is a piezoelectric ceramic.
Claim 17
Dependent Claim
49 words
The apparatus of claim 13 including: means to apply a constant frequency AC voltage to said annular member to cause said housing means to vibrate whereby the jet of liquid moving from the orifice breaks up into substantially equal size droplets related to the frequency of the AC voltage.
Claim 18
Dependent Claim
47 words
The apparatus of claim 12 wherein: said housing means includes a first member having a first passageway and said inlet opening, and a second member having said outlet opening attached to the first member, said disc means being located between said first member and said second member.
Claim 19
Dependent Claim
26 words
The apparatus of claim 16 wherein: said second member has a cylindrical wall and the first member has a cylindrical portion attached to said cylindrical wall.
Claim 20
Independent Claim
128 words
An apparatus usable with a source of liquid under pressure to generate droplets comprising: housing means having a passageway, an inlet opening, and an outlet opening in communication with the passageway, means having an orifice mounted on said housing means, said orifice being generally axially aligned with said outlet opening to direct a jet of liquid through the outlet opening, said housing means including a first member having a first passageway and said inlet opening and a second member having said outlet opening attached to the first member, said means having an orifice being located between said first member and said second member, and annular means engageable with said first member and said means having an orifice to position said means having an orifice on the housing means.
Claim 21
Independent Claim
128 words
An apparatus usable with a source of liquid under pressure to generate droplets comprising: housing means having a passageway, an inlet opening, and an outlet opening in communication with the passageway, means having an orifice mounted on said housing means, said orifice being generally axially aligned with said outlet opening to direct a jet of liquid through the outlet opening, said housing means including a first member having a first passageway and said inlet opening and a second member having said outlet opening attached to the first member, said means having an orifice being located between said first member and said second member, and annular means engageable with said first member and said means having an orifice to position said means having an orifice on the housing means.
Claim 22
Dependent Claim
13 words
The apparatus of claim 18 wherein: the annular means is a resilient O-ring.
Claim 23
Dependent Claim
24 words
The apparatus of claim 18 wherein: said second member has a recess surrounding the inlet opening, a disc means being located in said recess.
Claim 24
Dependent Claim
24 words
The apparatus of claim 12 wherein: said orifice in the disc means is a hole generally in the center portion of said disc means.
Claim 25
Dependent Claim
74 words
The apparatus of claim 12 wherein: the housing means comprises a first member having a generally flat portion, cylindrical side wall portion and an outwardly directed flange portion, said outlet opening being in said generally flat portion, and a second member attached to the side wall portion, said disc means being located between the first member and second member, and said means operable to vibrate the housing means being secured to the flange portion.
Claim 26
Dependent Claim
47 words
The apparatus of claim 22 wherein: the flat portion has an inwardly open recess, said disc means having an orifice is located in said recess, and resilient means engageable with the disc means and second member whereby the second member holds the disc means in said recess.
Claim 27
Dependent Claim
12 words
The apparatus of claim 23 wherein: the resilient means is an O-ring.
Claim 28
Dependent Claim
30 words
The apparatus of claim 22 wherein: the said means operable to vibrate the housing is a piezoelectric ceramic ring surrounding the side wall portion and secured to the flange portion.
Claim 29
Independent Claim
59 words
A method of generating a monodispersed aerosol comprising: discharging a liquid jet through an orifice in a member, vibrating the member to break up the liquid jet passing through the orifice into substantially uniform droplets, subjecting the droplets to a flow of turbulent air to disperse the droplets in the air, and discharging the droplets to a selected location.
Claim 30
Independent Claim
59 words
A method of generating a monodispersed aerosol comprising: discharging a liquid jet through an orifice in a member, vibrating the member to break up the liquid jet passing through the orifice into substantially uniform droplets, subjecting the droplets to a flow of turbulent air to disperse the droplets in the air, and discharging the droplets to a selected location.
Claim 31
Dependent Claim
22 words
The method of claim 26 wherein: the droplets are discharged into a stream of moving air which dilutes and transports the aerosol.
Claim 32
Dependent Claim
18 words
The method of claim 26 wherein: the member is vibrated at a frequency established by an AC voltage.
Claim 33
Dependent Claim
38 words
The method of claim 26 wherein: the liquid jet is discharged into a chamber having an outlet opening, said turbulent air being introduced into said chamber, and said droplets and turbulent air being discharged through said outlet opening.
Claim 34
Dependent Claim
24 words
The method of claim 26 wherein: the liquid jet is discharged in a direction in general alignment with the outlet opening for the chamber.
Claim 35
Dependent Claim
23 words
The method of claim 26 wherein: the droplets are subjected to a DC voltage to induce a unipolar electrical charge on the aerosol.
Claim 36
Independent Claim
129 words
An apparatus usable with a source of liquid under pressure to generate substantially equalized droplets comprising: housing means having a passageway, an inlet opening and an outlet opening in communication with the passageway whereby the liquid can flow through said housing means, mEans having an orifice mounted on said housing means between said inlet opening and said outlet opening, said orifice being open to liquid from said passageway whereby a jet of liquid is discharged fom the orifice, means secured to the housing means operable to vibrate the means having an orifice at a frequency that breaks up the jet of liquid moving from the orifice into substantially equal size droplets, said means secured to the housing means being an annular member of piezoelectric material surrounding said housing means.
Claim 37
Independent Claim
129 words
An apparatus usable with a source of liquid under pressure to generate substantially equalized droplets comprising: housing means having a passageway, an inlet opening and an outlet opening in communication with the passageway whereby the liquid can flow through said housing means, mEans having an orifice mounted on said housing means between said inlet opening and said outlet opening, said orifice being open to liquid from said passageway whereby a jet of liquid is discharged fom the orifice, means secured to the housing means operable to vibrate the means having an orifice at a frequency that breaks up the jet of liquid moving from the orifice into substantially equal size droplets, said means secured to the housing means being an annular member of piezoelectric material surrounding said housing means.
Claim 38
Dependent Claim
17 words
The apparatus of claim 32 wherein: said means having an orifice is a disc having a hole.
Claim 39
Dependent Claim
44 words
The apparatus of claim 32 wherein: the housing means comprises a first member having said outlet opening and a second member secured to the first member having the inlet opening, said means having an orifice being located between said first member and second member.
Claim 40
Dependent Claim
31 words
The apparatus of claim 34 including: resilient means engageable with one of said members and the means having an orifice to position the means having the orifice on the other member.
Claim 41
Dependent Claim
46 words
The apparatus of claim 34 wherein: one member has an inwardly open recess, said means having an orifice being located in said recess, and means engageable with said means having an orifice and the other member to hold the means having an orifice in said recess.
Claim 42
Dependent Claim
12 words
The apparatus of claim 36 wherein: said means is a resilient O-ring.
Claim 43
Dependent Claim
25 words
The apparatus of claim 34 wherein: said one member has an outwardly directed flange, said annular member of piezoelectric material being secured to said flange.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |