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US3090607A Expired / Lapsed US ⏱️ 0.0 years remaining

Cement mixer

Assignee: Individual
•
Filing: 1961-08-01
•
Granted: 1963-05-21
•
Expires: 1981-08-01
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Abstract

No abstract record available.

Inventors

  • 👤 Milton W Johnson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 11:18
CPC Classifications
B; B28; B28C; B28C5/00; B28C5/08; B28C5/18; B28C5/26; B28C5/32; B28C5/325

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 269 words
A CONSTANT FLOW CEMENT MIXER COMPRISING A ROTATING PAN HAVING A PLANAR BOTTOM, A CIRCUMFERTIAL UPSTANDING SIDE WALL, AND A CENTER OPENING, A STATIONARY WALL POSITIONED SO AS TO BE UPSTANDING FROM SAID PAN BOTTOM AND CURVING IN A HORIZONTAL PLANE, SAID STATIONARY WALLS BEGINNING ADJACENT SAID PAN WALL AND CURVING IN A GENERALLY SPIRAL-LIKE FASHION AND TERMINATING AT THE CENTER PORTION OF SAID PAN, SAID STATIONARY WALL COOPERATING WITH SAID PAN TO FORM A CURVING PASSAGEWAY, SAID PASSAGEWAY BEGINNING ADJACENT SAID PAN WALL AND BENDING IN A PROGRESSIVELY SHARPER CURVE TO TERMINATE AT THE CENTER PORTION OF THE PAN, MEANS TO CONTINUOUSLY FEED MATERIAL TO BE MIXED TO THE BEGINNING PORTION OF SAID PASSAGEWAY, A PLURALITY OF MIXING UNIT DISPOSED IN SAID PASSAGEWAY, ROTATIONAL MOVEMENT OF SAID PAN CAUSING A CONVEYOR-LIKE MOVEMENT OF THE BOTTOM PORTION OF SAID PASSAGEWAY SO AS TO MOVE THE MATERIAL CONTINUOUSLY THROUGH THE PASSAGEWAY AND THUS THROUGH THE MIXING UNITS AND TO THE CENTER OPENING TO EFFECT A CONTINUOUS DISCHARGE OF MIXED MATERIAL OUT THE CENTER OPENING, THE BEGINNING OF SAID PASSAGEWAY HAVING ITS INSIDE WALL DIVERGING FROM THE OUTER SIDE WALL AND TOWARD THE CENTER OF SAID PAN, MEANS TO FEED A PORTION OF SAID MATERIAL TO SAID PASSAGEWAY AT THE NARROWER PART OF SAID DIVERGENT PORTION, AND MEANS TO FEED ANOTHER PORTION OF SAID MATERIAL TO SAID PASSAGEWAY ADJACENT SAID INNER WALLS NEAR THE END OF SAID DIVERGENT PORTION SO THAT SAID OTHER PORTION OF MATERIAL IS POSITIONED TO ONE SIDE OF SAID FIRST NAMED PORTION OF SAID MATERIAL, THUS ENABLING MORE UNIFORM MIXING OF SAID TWO PORTION OF THE MATERIAL.

References Cited (Backward Citations)

US612584A Cited
US1398238A Cited
US2814399A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1966-05-20 1966-11-19 1967-05-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1970-05-20 1970-11-19 1971-05-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1974-05-20 1974-11-19 1975-05-21 $7700.00 Window Closed / Lapsed

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