US4004786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stirring device
Assignee: SPENCER HARRIS MACHINE & TOOL Co
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Filing: 1975-05-16
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Granted: 1977-01-25
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Expires: 1995-05-16
Abstract
Abstract A stirring device is disclosed for mixing liquid and dry ingredients in a tank. The stirring device employs an agitator prop having claws or fingers formed thereon to break up balls of dry ingredients, a shear plate to strain and shear ingredients forced therethrough by operation of the agitator prop and a pump prop. The agitator and pump props have reverse pitches with respect to each other such that both props push the ingredients toward the shear plate.
Inventors
- 👤 Will R. Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:26
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/05; B01F27/11; B01F27/19; B01F27/192
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
194 words
A stirring device for mixing ingredients in a tank comprising: (a 1 ) a tank, a. a motor, b. a shaft extending into said tank and mounted for rotational movement about a vertical axis, c. a horizontally disposed circular shear plate mounted for rotation with said shaft, said plate having a plurality of openings for shearing ingredients forced therethrough, d. a first prop mounted for rotation with said shaft above and spaced from said shear plate having at least two blades pitched from the horizontal to mix and propel said ingredients downwardly toward said shear plate and having a plurality of fingers extending outwardly from the ends of the blades in a direction toward the shear plate, e. a second prop mounted for rotation with said shaft below and spaced from said shear plate having at least two pump blades pitched from the horizontal in the direction opposite to the pitch of the blades of the first prop to mix and propel said ingredients upwardly toward said shear plate, whereby the combined actions of the first and second props produce a vortex condition in the vicinity of the rotating shear plate for thorough mixing.
Claim 2
Dependent Claim
194 words
A stirring device for mixing ingredients in a tank comprising: (a 1 ) a tank, a. a motor, b. a shaft extending into said tank and mounted for rotational movement about a vertical axis, c. a horizontally disposed circular shear plate mounted for rotation with said shaft, said plate having a plurality of openings for shearing ingredients forced therethrough, d. a first prop mounted for rotation with said shaft above and spaced from said shear plate having at least two blades pitched from the horizontal to mix and propel said ingredients downwardly toward said shear plate and having a plurality of fingers extending outwardly from the ends of the blades in a direction toward the shear plate, e. a second prop mounted for rotation with said shaft below and spaced from said shear plate having at least two pump blades pitched from the horizontal in the direction opposite to the pitch of the blades of the first prop to mix and propel said ingredients upwardly toward said shear plate, whereby the combined actions of the first and second props produce a vortex condition in the vicinity of the rotating shear plate for thorough mixing.
Claim 3
Dependent Claim
17 words
The device of claim 1 wherein said openings in said plate are circular openings of different diameters.
Claim 4
Dependent Claim
19 words
The device according to claim 1 wherein said openings are spaced equidistant from the center of said circular plate.
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) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |