Patent US3797809A successfully refreshed from Google Patents.
US3797809A
Expired / Lapsed
US
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Aerator apparatus
Assignee: Sydnor Hydrodynamics Inc
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Filing: 1972-04-20
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Granted: 1974-03-19
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Expires: 1992-04-20
Abstract
Abstract An aerator apparatus utilizing a top-mounted motor which provides a substantially streamlined flow of liquids from its input to its output. A hollow central frame member or volute is provided with a discontinuity in the form of an outwardly extending circumferential shoulder portion located substantially at the flotation line whereby liquids pumped with the central frame member are separated from contact therewith and exposed to atmospheric pressure. A principal deflector means is so formed vis-a-vis the inner shell for the flotation means that a diverging throat area is provided. The fluids leave the aerator apparatus substantially horizontally over the top of the flotation means. The latter is provided with a contour which corresponds substantially with the trajectory of the liquids expelled thereover. An auxiliary deflector means returns a small amount of the expelled liquids in order to provide lubrication for the bearings of a propeller driven by the motor.
Inventors
- 👤 G Sydnor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:15
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/14; C02F3/16; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/234; B01F23/2342; B01F23/23421; B01F23/237; B01F23/2376; B01F23/23761; B01F27/00; B01F27/05; B01F27/11; B01F27/113; B01F27/15; B01F27/80; B01F33/00; B01F33/50; B01F33/503; B01F35/00; B01F35/30; B01F35/32; B01F35/321; B01F35/3214; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
213 words
In an aerator apparatus having a top mounted motor and a propeller submerged in a body of liquid and driven by said motor, the combination comprising: a. a hollow central frame member having an interior wall portion surrounding and spaced from said propeller, 1. said central frame member having an outwardly flaring bottom portion which partially defines an inlet for liquids to said propeller, 2. said interior wall portion of said hollow frame member being provided with a pressure relief discontinuity in the form of an outwardly extending circumferential shoulder portion located in such a position on said wall portion that liquids being pumped within said central frame member are separated from contact with said interior wall portion and exposed to atmospheric pressuRe at said discontinuity, b. an anti-erosion disk supported from said outwardly flaring bottom portion of said central frame member, 1. said anti-erosion disk having a substantially cone-shaped member terminating immediately below said propeller, 2. said cone-shaped member cooperating with said outwardly flaring bottom portion to define therewith a substantially streamlined inlet for liquids to said propeller, c. a principal deflector means extending partially into an upper portion of said central frame member to define therewith an exit for liquid, d. and flotation means attached exteriorly of said central frame member.
Claim 2
Dependent Claim
213 words
In an aerator apparatus having a top mounted motor and a propeller submerged in a body of liquid and driven by said motor, the combination comprising: a. a hollow central frame member having an interior wall portion surrounding and spaced from said propeller, 1. said central frame member having an outwardly flaring bottom portion which partially defines an inlet for liquids to said propeller, 2. said interior wall portion of said hollow frame member being provided with a pressure relief discontinuity in the form of an outwardly extending circumferential shoulder portion located in such a position on said wall portion that liquids being pumped within said central frame member are separated from contact with said interior wall portion and exposed to atmospheric pressuRe at said discontinuity, b. an anti-erosion disk supported from said outwardly flaring bottom portion of said central frame member, 1. said anti-erosion disk having a substantially cone-shaped member terminating immediately below said propeller, 2. said cone-shaped member cooperating with said outwardly flaring bottom portion to define therewith a substantially streamlined inlet for liquids to said propeller, c. a principal deflector means extending partially into an upper portion of said central frame member to define therewith an exit for liquid, d. and flotation means attached exteriorly of said central frame member.
Claim 3
Dependent Claim
43 words
said auxiliary deflector means being so arranged so as to deflect some of said exit liquids into said conduit means of said principal deflector means to lubricate and cool said bearing support, e. and flotation means attached exteriorly of said central frame member.
Claim 4
Dependent Claim
43 words
said auxiliary deflector means being so arranged so as to deflect some of said exit liquids into said conduit means of said principal deflector means to lubricate and cool said bearing support, e. and flotation means attached exteriorly of said central frame member.
Claim 5
Dependent Claim
9 words
said motor being mounted atop said principal deflector means,
Claim 6
Dependent Claim
9 words
said motor being mounted atop said principal deflector means,
Claim 7
Dependent Claim
45 words
said cone-shaped member cooperating with said outwardly flaring bottom portion to define therewith a substantially streamlined inlet for liquids to said propeller, c. a principal deflector means extending partially into an upper portion of said central frame member to define therewith an exit for liquids,
Claim 8
Dependent Claim
45 words
said cone-shaped member cooperating with said outwardly flaring bottom portion to define therewith a substantially streamlined inlet for liquids to said propeller, c. a principal deflector means extending partially into an upper portion of said central frame member to define therewith an exit for liquids,
Claim 9
Dependent Claim
66 words
An aerator apparatus as defined in claim 1 wherein said flotation means is mounted exteriorly but immediately adjacent said central frame member and its cross-section is such as to provide a greater area of buoyant material immediately above its normal flotation line whereby the depression of any portion of the aerator apparatus into said body of fluids is counteracted by an increasingly larger buoyant restoring force.
Claim 10
Dependent Claim
56 words
said cone-shaped member cooperating with said outwardly flaring bottom portion to define therewith a substantially streamlined inlet for liquids to said propeller, c. a principal deflector means extending partially into an upper portion of said central frame member to define therewith an exit for liquid, d. and flotation means attached exteriorly of said central frame member.
Claim 11
Dependent Claim
56 words
said cone-shaped member cooperating with said outwardly flaring bottom portion to define therewith a substantially streamlined inlet for liquids to said propeller, c. a principal deflector means extending partially into an upper portion of said central frame member to define therewith an exit for liquid, d. and flotation means attached exteriorly of said central frame member.
Claim 12
Dependent Claim
77 words
said interior wall portion of said hollow frame member being provided with a pressure relief discontinuity in the form of an outwardly extending circumferential shoulder portion located in such a position on said wall portion that liquids being pumped within said central frame member are separated from contact with said interior wall portion and exposed to atmospheric pressuRe at said discontinuity, b. an anti-erosion disk supported from said outwardly flaring bottom portion of said central frame member,
Claim 13
Dependent Claim
77 words
said interior wall portion of said hollow frame member being provided with a pressure relief discontinuity in the form of an outwardly extending circumferential shoulder portion located in such a position on said wall portion that liquids being pumped within said central frame member are separated from contact with said interior wall portion and exposed to atmospheric pressuRe at said discontinuity, b. an anti-erosion disk supported from said outwardly flaring bottom portion of said central frame member,
Claim 14
Dependent Claim
23 words
An aerator apparatus as defined in claim 2 wherein said central frame member provides at least a partial enclosure for said flotation means.
Claim 15
Dependent Claim
36 words
said principal deflector means carrying a bearing support for a main shaft of said motor which drives said propeller, d. an auxiliary deflector means extending partially into said liquid at the exit of said aerator apparatus,
Claim 16
Dependent Claim
36 words
said principal deflector means carrying a bearing support for a main shaft of said motor which drives said propeller, d. an auxiliary deflector means extending partially into said liquid at the exit of said aerator apparatus,
Claim 17
Dependent Claim
47 words
An aerator apparatus as defined in claim 2 including means for providing variable spacing between the outermost edge of said principal deflector means and said enclosure for said flotation means and thereby varying the degree of divergence from said propeller to the exit of said aerator apparatus.
Claim 18
Dependent Claim
32 words
An aerator apparatus as defined in claim 2 wherein said flotation means comprises a foamed plastic material within an enclosure and includes means for supporting said enclosure from said main deflector means.
Claim 19
Dependent Claim
37 words
An aerator apparatus as defined in claim 5 including means to spread the load of said aerator apparatus itself from said principal deflector means to said foamed plastic material within said enclosure over a relatively wide area.
Claim 20
Dependent Claim
45 words
An aerator apparatus as defined in claim 1 wherein said principal deflector means extends into said central frame member to said propeller and thereby extending a substantially streamlined flow which is essentially toroidal in cross-section from the inlet to the outlet of said aerator apparatus.
Claim 21
Dependent Claim
36 words
An aerator apparatus as defined in claim 1 wherein said principal deflector means and said upper portion of said central frame area define a diverging throat area continuous in extent from said propeller to said exit.
Claim 22
Dependent Claim
38 words
An aerator apparatus as defined in claim 1 wherein said motor is mounted atop said principal deflector means and said principal deflector means carries a bearing support for a main shaft of said motor which drives said propeller.
Claim 23
Dependent Claim
66 words
An aerator apparatus as defined in claim 1 wherein liquids are projected substantially horizontally from the exit defined by said principal deflector means and said upper portion of said central frame member, and said flotation means has an upper surface over which said liquids pass with said upper surface of said flotation means being formed so as to conform to the anticipated trajectory of said liquids.
Claim 24
Dependent Claim
33 words
An aerator apparatus as defined in claim 1 wherein said propeller is normally positioned below the surface of the water a linear distance approximately equal to its diameter in order to minimize cavitation.
Claim 25
Dependent Claim
34 words
An aerator apparatus as defined in claim 1 wherein said central frame member is made from Fiberglas and is provided with a cylindrical inner sleeve of stainless steel in the region surrounding said propeller.
Claim 26
Dependent Claim
47 words
An aerator apparatus as defined in claim 1 including means for providing variable spacing between the outermost edge of said principal deflector means and said enclosures for said flotation means and thereby varying the degree of divergence from said propeller to the exit of said aerator apparatus.
Claim 27
Dependent Claim
43 words
In an aerator apparatus having a top mounted motor and a propeller submerged in a body of liquids and driven by said moTor, the combination comprising: a. a hollow central frame member having an interior wall portion surrounding and spaced from said propeller,
Claim 28
Dependent Claim
43 words
In an aerator apparatus having a top mounted motor and a propeller submerged in a body of liquids and driven by said moTor, the combination comprising: a. a hollow central frame member having an interior wall portion surrounding and spaced from said propeller,
Claim 29
Dependent Claim
47 words
An aerator apparatus as defined in claim 14 wherein said principal deflector means is substantially conical in cross-section and is provided with a plurality of grooves leading toward said bearing support whereby liquids deflected by said auxiliary deflector means are returned by gravity to said bearing support.
Claim 30
Dependent Claim
24 words
An aerator apparatus as defined in claim 15 wherein said auxiliary deflector means are mounted around the outer periphery of said principal deflector means.
Claim 31
Dependent Claim
42 words
In an aerator apparatus having a top-mounted motor and a propeller submerged in a body of liquids and driven by said motor, the combination comprising: a. a hollow central frame member having an interior wall portion surrounding and spaced from said propeller,
Claim 32
Dependent Claim
42 words
In an aerator apparatus having a top-mounted motor and a propeller submerged in a body of liquids and driven by said motor, the combination comprising: a. a hollow central frame member having an interior wall portion surrounding and spaced from said propeller,
Claim 33
Dependent Claim
36 words
An aerator apparatus as defined in claim 17 wherein said principal deflector means and said upper portion of said central frame area define a diverging throat area continuous in extent from said propeller to said exit.
Claim 34
Dependent Claim
38 words
An aerator apparatus as defined in claim 17 wherein said motor is mounted atop said principal deflector means and said principal deflector means carries a bearing support for a main shaft of said motor which drives said propeller.
Claim 35
Dependent Claim
66 words
An aerator apparatus as defined in claim 17 wherein liquids are projected substantially horizontally from the exit defined by said principal deflector means and said upper portion of said central frame member, and said flotation means has an upper surfacE over which said liquids pass with said upper surface of said flotation means being formed so as to conform to the anticipated trajectory of said liquids.
Claim 36
Dependent Claim
33 words
An aerator apparatus as defined in claim 17 wherein said propeller is normally positioned below the surface of the water a linear distance approximately equal to its diameter in order to minimize cavitation.
Claim 37
Dependent Claim
37 words
An aerator apparatus as defined in claim 17 including means to spread the load of said aerator apparatus itself from said principal deflector means to said foamed plastic material within said enclosure over a relatively wide area.
Claim 38
Dependent Claim
47 words
An aerator apparatus as defined in claim 17 including means for providing variable spacing between the outermost edge of said principal deflector means and said enclosure for said flotation means and thereby varying the degree of divergence from said propeller to the exit of said aerator apparatus.
Claim 39
Dependent Claim
34 words
An aerator apparatus as defined in claim 17 wherein said central frame member is made from Fiberglas and is provided with a cylindrical inner sleeve of stainless steel in the region surrounding said propeller.
Claim 40
Dependent Claim
75 words
An aerator apparatus as defined in claim 17 including an auxiliary deflector means which extends partially into said liquids at the exit of said aerator apparatus, said principal deflector means having conduit means which extend downwardly toward said bearing support for said main shaft, said auxiliary deflector means being so arranged so as to deflect some of said liquids into said conduit means of said principal deflector means to lubricate and cool said bearing support.
Claim 41
Dependent Claim
51 words
An aerator apparatus as defined in claim 25 wherein said principal deflector means is substantially conical in cross section and wherein said conduit means consists of a plurality of grooves leading toward said bearing support whereby liquid deflected by said auxiliary deflector means are returned by gravity to said bearing support.
Claim 42
Dependent Claim
24 words
An aerator apparatus as defined in claim 26 wherein said auxiliary deflector means are mounted around the outer periphery of said principal deflector means.
Claim 43
Dependent Claim
67 words
An aerator apparatus as defined in claim 17 wherein said flotation means is mounted exteriorly but immediately adjacent said central frame member and its cross section is such as to provide a greater area of buoyant material immediately above its normal flotation line whereby the depression of any portion of the aerator apparatus into said body of fluids is counteracted by an increasingly larger buoyant restoring force.
Claim 44
Dependent Claim
23 words
An aerator apparatus as defined in claim 28 wherein said central frame member provides at least a partial enclosure for said flotation means.
Claim 45
Dependent Claim
32 words
An aerator apparatus as defined in claim 29 wherein said flotation means comprises a foamed plastic material within an enclosure and includes means for supporting said enclosure from said main deflector means.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |