Patent US3759495A successfully refreshed from Google Patents.
US3759495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid aerating rotor assembly
Assignee: Cherne Industries Inc
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Filing: 1971-05-03
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Granted: 1973-09-18
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Expires: 1991-05-03
Abstract
Abstract A liquid aerating and mixing rotor assembly suitable for sewage treatment in an aerobic bacterial activated sludge process includes a supporting frame mounted on floats or rigid supports. A rotor member is supported on the frame for rotation around a horizontal axis. It includes rotor surfaces for engaging the liquid, urging the liquid in a downstream direction along a path extending perpendicularly away from the rotor axis, and lifting and projecting substantial portions of the liquid upwardly in both upstream and downstream directions from the rotor, for aeration and mixing of the liquid. The assembly includes a deflecting member supported on the frame close to and upstream from the rotor member in a position to intercept the upstream projected portions of the liquid and guide them laterally to at least one side of the desired path, thereby preventing the projected liquid portions from passing under the rotor a second time for further aeration. Preferably, the deflecting member is selectively movable from its lateral-deflecting position to a second position in which the liquid portions projected in an upstream direction can be passed beneath or into the rotor a second time for selective additional aeration. In a third position of the deflecting member, it may provide a lifting frame for engagement by a suitable lifting device to move the assembly from one position to another. The rotor member for the assembly preferably includes a plurality of paddle-like surfaces extending radially from the rotor axis, with the outer edges of the surfaces inclined forwardly in the direction of rotation of the rotor to assist in retaining liquid on the rotor surface for projection of substantial quantities of liquid both upwardly and in an upstream direction for better aeration. Suitable openings in the paddle surfaces, with the locations of such openings in staggered relation in successive rotor surfaces, provide increased turbulence and greater aeration.
Inventors
- 👤 L Boler
- 👤 N Hanssen
- 👤 B Beaulieu
- 👤 L Cherne
- 👤 H Halvorson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:52
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/14; C02F3/18; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/234; B01F23/2342; B01F27/00; B01F27/60; B01F33/00; B01F33/50; B01F33/503; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
226 words
A liquid aerating rOtor assembly for aeration of liquid during relative movement of the liquid and the rotor assembly along a desired path, said rotor assembly comprising a supporting frame, a rotor member rotatably supported on said frame for rotation on a horizontal axis extending transversely above the liquid path, power means for rotating the rotor around its axis, the rotor member having rotor surfaces for engaging the liquid and urging the liquid in a relative downstream direction along said path in response to rotation of the rotor, said rotor surfaces also lifting and projecting substantial portions of the liquid upwardly and forwardly from said rotor member in a relative upstream direction for aeration of the liquid as it is projected forwardly and falls downwardly toward the surface of the liquid in said path at a forward position relatively upstream from the rotor member, and a deflecting member supported on said frame in a forward position close to and upstream from the rotor member, said deflecting member having a deflecting surface intercepting at least some of the upwardly and forwardly projected liquid portions and guiding said portions laterally to at least one side of the liquid path, thereby preventing some of the projected liquid portions from returning to the liquid surface at a location where they will again be engaged and projected by said rotor member.
Claim 2
Dependent Claim
226 words
A liquid aerating rOtor assembly for aeration of liquid during relative movement of the liquid and the rotor assembly along a desired path, said rotor assembly comprising a supporting frame, a rotor member rotatably supported on said frame for rotation on a horizontal axis extending transversely above the liquid path, power means for rotating the rotor around its axis, the rotor member having rotor surfaces for engaging the liquid and urging the liquid in a relative downstream direction along said path in response to rotation of the rotor, said rotor surfaces also lifting and projecting substantial portions of the liquid upwardly and forwardly from said rotor member in a relative upstream direction for aeration of the liquid as it is projected forwardly and falls downwardly toward the surface of the liquid in said path at a forward position relatively upstream from the rotor member, and a deflecting member supported on said frame in a forward position close to and upstream from the rotor member, said deflecting member having a deflecting surface intercepting at least some of the upwardly and forwardly projected liquid portions and guiding said portions laterally to at least one side of the liquid path, thereby preventing some of the projected liquid portions from returning to the liquid surface at a location where they will again be engaged and projected by said rotor member.
Claim 3
Dependent Claim
79 words
A liquid aerating rotor assembly according to claim 1 in which said rotor member includes a plurality of paddle wheel blades extending generally parallel to and spaced around said axis, said blades providing rotor surfaces extending radially outwardly from said axis and transversely of said path, each of said blades having a plurality of openings through its rotor surface for delivery of some liquid portions from the rotor surface through said openings and into engagement with a following blade.
Claim 4
Dependent Claim
60 words
A liquid aerating rotor assembly according to claim 2 in which the openings in the rotor surfaces of immediately successive blades are at different relative locations in the respective blade surfaces for turbulent delivery of liquid portions through the openings of one blade surface into engagement with liquid portions carried by an imperforate portion of an immediately following blade surface.
Claim 5
Dependent Claim
48 words
A liquid aerating rotor assembly according to claim 2 in which an outer edge of each blade surface projects forwardly in the direction of rotor rotation, thereby delaying radial movement of liquid from the blade surface and increasing the effective upstream projection of liquid from the blade surface.
Claim 6
Dependent Claim
100 words
A liquid aerating rotor assembly according to claim 2 in which an outer edge of each blade surface projects forwardly in the direction of rotor rotation, thereby delaying radial movement of liquid from the blade surface and increasing the effective upstream projection of liquid from the blade surface, and in which the openings in the rotor surfaces of immediately successive blades are at different relative locations in the respective blade surfaces for turbulent delivery of liquid portions through the openings of one blade surface into engagement with liquid portions carried by an imperforate portion of an immediately following blade surface.
Claim 7
Dependent Claim
86 words
A liquid aerating rotor assembly according to claim 1 in which said rotor member includes a plurality of paddle wheel blades extending generally parallel to and spaced around said axis, said blades providing rotor surfaces extending radially outwardly from said axis and transversely of said path, and in which an outer edge of each blade surface projects forwardly in the direction of rotor rotation, thereby delaying radial movement of liquid from the blade surface and increasing the effective upstream projection of liquid from the blade surface.
Claim 8
Dependent Claim
54 words
A liquid aerating rotor assembly according to claim 1 in which said deflecting member is movable from said forward position to a second position at which the projected liquid portions are returned to said liquid path directly upstream fRom said rotor member for possible further engagement and projection of said portions by said rotor.
Claim 9
Dependent Claim
35 words
A liquid aerating rotor assembly according to claim 7 in which said deflecting member is pivotally supported for swinging movement between said forward and second positions around a pivotal axis parallel to said rotor axis.
Claim 10
Dependent Claim
88 words
A liquid aerating rotor assembly according to claim 8 in which said pivotal axis is located at a level near said rotor axis and spaced longitudinally between said deflecting member and rotor axis when the deflecting member is in forward position, said deflecting surface having a generally hoirzontal main area bridging the liquid path upstream of the rotor when the deflecting member is in its forward position, and said main area extending upwardly and forwardly from the pivotal axis when the deflecting member is in its second position.
Claim 11
Dependent Claim
74 words
A liquid aerating rotor assembly according to claim 9 in which said deflecting surface has an upwardly projecting upstream barrier edge portion blocking upstream discharge of liquid from the main area of said surface into said liquid path when the deflecting member is in forward position, said barrier edge portion guiding the forwardly projected liquid portions laterally to the sides of the liquid path for downstream passage around the ends of said rotor member.
Claim 12
Dependent Claim
58 words
A liquid aerating rotor assembly according to claim 8 in which deflecting member is selectively movable to a third position, said deflecting member having connecting means for engagement by a lifting device for lifting and moving the deflecting member and remaining portions of the rotor assembly as a unit, when the deflecting member is in said third position.
Claim 13
Dependent Claim
31 words
A liquid aerating rotor assembly according to claim 11 including manually releasable retaining means for selectively and rigidly securing said deflecting means in each of its three positions on said frame.
Claim 14
Dependent Claim
90 words
A liquid aerating rotor assembly according to claim 12 in which said releasable retaining means includes a pair of retaining arms each having one end pivoted to an outer corner of said deflecting member for swinging movement on a common axis parallel to said pivotal support axis and rotor axis, the other end of each retaining arm having releasable first connecting means, and said frame having three corresponding pairs of cooperating second connecting means spaced longitudinally on said frame for selective engagement and retention of said releasable first connecting means.
Claim 15
Dependent Claim
79 words
A liquid aerating rotor assembly according to claim 7 in which said deflecting member is supported for movement between said forward position on said frame upstream from the rotor member and a second position on said frame downstream from the rotor member, said frame providing a relatively clear path for movement of said projected liquid portions directly back into the liquid path at a location upstream from the rotor member, when the deflecting member is in its second position.
Claim 16
Dependent Claim
94 words
A liquid aerating rotor assembly according to claim 14 in which the deflecting member, in its second position intercepts some of such upwardly projected liquid portions as are falling back toward the liquid downstream from the rotor and deflects such portions into the liquid in a direction reducing the liquid propulsion effect otherwise caused by impact of such portions with the liquid at an angle having a downstream component of thrust, selective movement of the deflecting member between its first and second positions thereby modifying the rate of relative liquid movement along said path.
Claim 17
Dependent Claim
104 words
A liquid aerating rotor assembly according to claim 1 in which the deflecting surface of the deflecting member includes a generally horizontal main surface area substantially bridging the liquid path directly upstream from the rotor and an upwardly projecting upstream barrier surface area blocking direct upstream discharge of liquid from the main surface area into said liquid path ahead of the rotor member, and said barrier surfacE area guiding the forwardly projected liquid portions laterally to at least one side of the liquid path for relative downstream passage around an end of the rotor member without substantial further aeration by the same rotor member.
Claim 18
Dependent Claim
157 words
A liquid aerating rotor assembly according to claim 16 in which the deflecting member is pivotally supported on said frame for swinging movement around a pivotal support axis parallel to the rotor axis and spaced longitudinally of the liquid path between the main surface area and the rotor axis, said deflecting member having manually releasable retaining means for selectively and rigidly securing the member in its forward position, the retaining means including a retaining arm having one end secured to the deflecting member near an upper edge of the upwardly projecting upstream barrier surface area, the retaining arm having its opposite end secured to said supporting frame at a location thereon spaced in an upstream direction from said upper edge of the barrier surface area and thereby providing a reinforcing connection between said upper edge and frame for holding the barrier surface area firmly in position against the upstream forces applied by the forwardly projected liquid portions.
Claim 19
Dependent Claim
54 words
A liquid aerating rotor assembly according to claim 1 in which said supporting frame has a plurality of supporting floats spaced laterally from each other at opposite sides of said liquid path and providing a relatively clear passage for relative fluid movement directly along the path and into the engagement with the rotor member.
Claim 20
Dependent Claim
180 words
A liquid aerating rotor assembly for aeration of liquid during relative movement of the liquid and the rotor assembly along a desired path, said rotor assembly in unobstructed and direct communication with the atmosphere and comprising a supporting frame, a rotor member rotatably supported on said frame for rotation on a horizontal axis extending transversely above the liquid path for projection of the liquid both upwardly above the rotor and forwardly in an upstream direction along said path, and power means for rotating the rotor around its axis, the rotor member having a plurality of paddle wheel blades extending generally parallel to and spaced around said axis, said blades providing rotor surfaces extending radially outwardly from said axis and transversely of said path for engaging the liquid and urging the liquid in a relative downstream direction along said path in response to rotation of the rotor, each of said blades having a plurality of openings through its rotor surface for delivery of some liquid portions from the rotor surface backwardly through said openings and into engagement with a following blade.
Claim 21
Dependent Claim
180 words
A liquid aerating rotor assembly for aeration of liquid during relative movement of the liquid and the rotor assembly along a desired path, said rotor assembly in unobstructed and direct communication with the atmosphere and comprising a supporting frame, a rotor member rotatably supported on said frame for rotation on a horizontal axis extending transversely above the liquid path for projection of the liquid both upwardly above the rotor and forwardly in an upstream direction along said path, and power means for rotating the rotor around its axis, the rotor member having a plurality of paddle wheel blades extending generally parallel to and spaced around said axis, said blades providing rotor surfaces extending radially outwardly from said axis and transversely of said path for engaging the liquid and urging the liquid in a relative downstream direction along said path in response to rotation of the rotor, each of said blades having a plurality of openings through its rotor surface for delivery of some liquid portions from the rotor surface backwardly through said openings and into engagement with a following blade.
Claim 22
Dependent Claim
60 words
A liquid aerating rotor assembly according to claim 19 in which the openings in the rotor surfaces of immediately successive blades are at different relative locations in the respective blade surface for turbulent delivery of liquid portions through the openings of one blade surface into engagement with liquid portions carried by an imperforate portion of an immediately following blade surface.
Claim 23
Dependent Claim
71 words
A liquid aerating rotor assembly according to claim 19 in which an outer edge of each blade surface projects forwardly in the direction of rotor rotation at a slight angle from the radially extending rotor surface, thereby delaying radial movement of liquid from the blade surface and increasing the effective projection of liquid from the blade surface both upwardly above the rotor and forwardly in an upstream direction along said path.
Claim 24
Dependent Claim
60 words
A liquid aerating rotor assembly according to claim 21 in which the openings in the rotor surfaces of immediately successive blades are at different relative locations in the respective blade surfaces for turbulent delivery of liquid portions through the openings of one blade surface into engagement with liquid portions carried by an imperforate portion of an immediately following blade surface.
Claim 25
Dependent Claim
51 words
A liquid aerating rotor assembly according to claim 19 in which at least some of said openings are completely surrounded by imperforate portions of the rotor surface in which said openings are provided, the imperforate portions of the rotor surface urging the liquid in its relative downstream direction along said path.
Claim 26
Dependent Claim
31 words
A liquid aerating rotor assembly according to claim 23 in which all of said openings are completely surrounded by imperforate portions of the rotor surface in which said openings are provided.
Claim 27
Dependent Claim
157 words
A liquid aerating rotor member for aeration of liquid during relative movement of the liquid and the rotor member along a desired path; the rotor member being in unobstructed and direct communication with the atmosphere and constructed for rotation around a horizontal axis extending transversely above the liquid path, said rotor member having a plurality of paddle-like blades extending generally parallel to and spaced around said axis, said blades having main rotor surfaces extending radially outwardly from said axis and transversely of said path for engaging the liquid and urging the liquid in a relative downstream direction along said path in response to rotation of the rotor, and said blades also having outer edge surfaces projecting forwardly, in the direction of rotor rotation, from said main rotor surfaces, said outer edge surfaces increasing the effective lifting and projection of liquid by the rotor both upwardly above the rotor and forwardly in an upstream direction along said path.
Claim 28
Dependent Claim
157 words
A liquid aerating rotor member for aeration of liquid during relative movement of the liquid and the rotor member along a desired path; the rotor member being in unobstructed and direct communication with the atmosphere and constructed for rotation around a horizontal axis extending transversely above the liquid path, said rotor member having a plurality of paddle-like blades extending generally parallel to and spaced around said axis, said blades having main rotor surfaces extending radially outwardly from said axis and transversely of said path for engaging the liquid and urging the liquid in a relative downstream direction along said path in response to rotation of the rotor, and said blades also having outer edge surfaces projecting forwardly, in the direction of rotor rotation, from said main rotor surfaces, said outer edge surfaces increasing the effective lifting and projection of liquid by the rotor both upwardly above the rotor and forwardly in an upstream direction along said path.
Claim 29
Dependent Claim
54 words
A liquid aerating rotor member according to claim 25 in which at least some of the main rotor surfaces have a plurality of openings therethrough surrounded by imperforate surface portions for delivery of some liquid portions from the main rotor surfaces of one blade through said openings and into engagement with a following blade.
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |