US3863903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agitator assembly for mixing paint
Assignee: Stewart Warner Alemite Corp
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Filing: 1974-01-11
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Granted: 1975-02-04
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Expires: 1994-01-11
Abstract
Abstract A paint agitator assembly comprising an impeller carried by a magnet in the cup for mixing the paint, with the pain discharge tube located between the impeller end and the cup wall for preventing a vortex. The magnet is rotated by a second magnet external to the cup, and the second magnet is in turn rotated by a high speed air turbine through a series of plastic gears arranged to provide speed reduction and high torque for rotating the first magnet. The air for driving the turbine is provided through a throttling valve and metering orifice to the air turbine and follows a tortuous path extending in sequence through circumferentially offset holes to reduce noise.
Inventors
- 👤 John Brehmer
- 👤 Russell C Brewer
- 👤 John W Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:08
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/06; B01; B01F; B01F33/00; B01F33/45; B01F33/453; B01F33/4535; B05; B05B; B05B15/00; B05B15/20; B05B15/25; B05B7/00; B05B7/24; B05B7/2402; B05B7/2405; B05B7/2408
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
143 words
An agitator assembly for a paint cup having a back wall and a peripheral wall, comprising a first magnet, an impeller, means securing said impeller to said first magnet, means on the back wall of said paint cup for rotatably supporting said first magnet and impeller in said paint cup, a second magnet, means supporting said second magnet for coaxial rotation with said first magnet and external to said cup in a position adjacent to said cup back wall for rotating said first magnet in response to rotation of said second magnet, an air turbine, a plurality of speed reduction gears, and means rotatably supporting said gears and turbine with said gears interconnected between said turbine and said second magnet for rotating said second magnet at a speed substantially below the speed of said turbine in response to the rotation of said turbine.
Claim 2
Dependent Claim
143 words
An agitator assembly for a paint cup having a back wall and a peripheral wall, comprising a first magnet, an impeller, means securing said impeller to said first magnet, means on the back wall of said paint cup for rotatably supporting said first magnet and impeller in said paint cup, a second magnet, means supporting said second magnet for coaxial rotation with said first magnet and external to said cup in a position adjacent to said cup back wall for rotating said first magnet in response to rotation of said second magnet, an air turbine, a plurality of speed reduction gears, and means rotatably supporting said gears and turbine with said gears interconnected between said turbine and said second magnet for rotating said second magnet at a speed substantially below the speed of said turbine in response to the rotation of said turbine.
Claim 3
Dependent Claim
14 words
The assembly claimed in claim 1 in which said gears are formed of plastic.
Claim 4
Dependent Claim
44 words
The assembly claimed in claim 2 in which said means for securing said impeller to said magnet comprises a cup member formed of plastic having a peripheral wall in encircling engagement with said magnet, and said impeller is integrally formed on said cup member.
Claim 5
Dependent Claim
60 words
The assembly claimed in claim 3 in which said means on said paint cup comprises a capstan formed of plastic having one end for rotatably supporting said plastic cup member and first magnet, an axially extending wall passing axially through said first magnet, and a projection at the other end of said capstan extending through said paint cup back wall.
Claim 6
Dependent Claim
136 words
The assembly claimed in claim 4 in which said means supporting said gears comprises a shaft secured at one end to said capstan projection, a pair of axially spaced radially extending walls encircling said shaft, a cup-shaped plastic housing, means securing the back wall of said cup-shaped plastic housing to the other end of said shaft with said turbine and a first small diameter gear rotatably supported on said shaft and located axially intermediate the back wall of said plastic housing and one of said radially extending walls, sAid second magnet and a large diameter gear rotatably supported on said shaft intermediate said radially extending walls, and an integrally formed large and small diameter gear rotatably supported between said radially extending walls for engaging said turbine small diameter gear and second magnet large diameter gear respectively.
Claim 7
Dependent Claim
24 words
In the assembly claimed in claim 1, a metering orifice for supplying air under pressure at a limited rate and tangentially to said turbine.
Claim 8
Dependent Claim
26 words
In the assembly claimed in claim 6, valve means for selectively supplying pressurized air at a controlled rate to said metering orifice to drive said turbine.
Claim 9
Dependent Claim
44 words
In the assembly claimed in claim 1, a paint discharge tube for said paint cup with said discharge tube having a terminating portion located between said impeller and the peripheral wall of said paint cup and adjacent the back wall of said paint cup.
Claim 10
Dependent Claim
19 words
The agitator assembly claimed in claim 1 in which said turbine includes vanes spaced at circumferentially unequally spaced positions.
Claim 11
Dependent Claim
178 words
An agitator assembly for a paint cup having a back wall and a peripheral wall, comprising a magnet, an impeller carried by said magnet, means extending through the back wall of said cup for rotatably supporting said magnet and impeller in said cup, a second magnet, a shaft secured to said extending means, means including a large diameter gear secured to said second magnet and supporting said second magnet for rotation about the axis of said shaft in a position axially aligned with said first magnet and adjacent to said back wall for rotating said first magnet in response to rotation of said second magnet, an air turbine including an integrally formed small diameter gear supported for rotation about the axis of said shaft at a position axially spaced from said paint cup back wall, and a pair of integrally formed gears rotatably supported for engaging said turbine gear and said second magnet gear respectively for rotating said second magnet at a speed substantially below the speed of said turbine in response to the rotation of said turbine.
Claim 12
Dependent Claim
178 words
An agitator assembly for a paint cup having a back wall and a peripheral wall, comprising a magnet, an impeller carried by said magnet, means extending through the back wall of said cup for rotatably supporting said magnet and impeller in said cup, a second magnet, a shaft secured to said extending means, means including a large diameter gear secured to said second magnet and supporting said second magnet for rotation about the axis of said shaft in a position axially aligned with said first magnet and adjacent to said back wall for rotating said first magnet in response to rotation of said second magnet, an air turbine including an integrally formed small diameter gear supported for rotation about the axis of said shaft at a position axially spaced from said paint cup back wall, and a pair of integrally formed gears rotatably supported for engaging said turbine gear and said second magnet gear respectively for rotating said second magnet at a speed substantially below the speed of said turbine in response to the rotation of said turbine.
Claim 13
Dependent Claim
34 words
In the assembly claimed in claim 10, a cup-shaped housing secured to said shaft with a metering orifice therein for passing air under pressure in a direction tangential to the vanes of said turbine.
Claim 14
Dependent Claim
30 words
In the assembly claimed in claim 11, a throttling valve interconnected between said orifice and a source of pressurized air for controlling the application of air to said metering orifice.
Claim 15
Dependent Claim
34 words
In the assembly claimed in claim 12, circumferentially offset air passageways for sequentially passing air to atmosphere after passage tangential to said vanes to thereby limit the noise and vibration created by said air.
Claim 16
Dependent Claim
45 words
In the assembly claimed in claim 10, a lid for said paint cup, and a paint discharge tube secured to said lid at a position coaxial with said shaft and extending to a position adjacent the path described by a radial end of said impeller.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |