US3305222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for preparing batches of concrete
Assignee: Individual
•
Filing: 1965-06-11
•
Granted: 1967-02-21
•
Expires: 1985-06-11
Abstract
No abstract record available.
Inventors
- 👤 William T J Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:55
CPC Classifications
B; B28; B28C; B28C9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
APPARATUS FOR PREPARING BATCHES OF CONCRETE, COMPRISING (A) A RECEIVING CHAMBER, (B) A CEMENT HOPPER, (C) A SAND HOPPER, (D) A GRAVEL HOPPER, (E) DISCHARGE MEANS COMMUNICATING EACH OF THE SAID HOPPERS WITH THE RECEIVING CHAMBER, (F) CONTROL MEANS ASSOCIATED WITH EACH DISCHARGE MEANS FOR REGULATING THE AMOUNT OF MATERIAL DISCHARGED FROM THE ASSOCIATED HOPPER TO THE RECEIVING CHAMBER, (G) ELEVATING CONVEYOR MEANS COMMUNICATING AT ITS LOWER END WITH THE RECEIVING CHAMBER, (H) A MIXING CHAMBER INCLUDING A MIXING MEANS THEREIN, (I) OUTFEED MEANS COMMUNICATING THE UPPER END OF THE CONVEYOR MEANS WITH THE MIXING CHAMBER, (J) MEANS COMMUNICATING WITH THE RECEIVING CHAMBER FOR FEEDING SAND AND GRAVEL SELECTIVELY THERETO, AND (K) DELIVERY MEANS COMMUNICATING THE UPPER END OF THE CONVEYOR MEANS SELECTIVELY WITH THE SAND AND GRAVEL HOPPERS FOR DELIVERING SAND AND GRAVEL TO SAID RESPECTIVE HOPPERS FROM THE RECEIVING CHAMBERS BY SAID ELEVATING CONVEYOR MEANS.
Claim 2
Dependent Claim
147 words
APPARATUS FOR PREPARING BATCHES OF CONCRETE, COMPRISING (A) A RECEIVING CHAMBER, (B) A CEMENT HOPPER, (C) A SAND HOPPER, (D) A GRAVEL HOPPER, (E) DISCHARGE MEANS COMMUNICATING EACH OF THE SAID HOPPERS WITH THE RECEIVING CHAMBER, (F) CONTROL MEANS ASSOCIATED WITH EACH DISCHARGE MEANS FOR REGULATING THE AMOUNT OF MATERIAL DISCHARGED FROM THE ASSOCIATED HOPPER TO THE RECEIVING CHAMBER, (G) ELEVATING CONVEYOR MEANS COMMUNICATING AT ITS LOWER END WITH THE RECEIVING CHAMBER, (H) A MIXING CHAMBER INCLUDING A MIXING MEANS THEREIN, (I) OUTFEED MEANS COMMUNICATING THE UPPER END OF THE CONVEYOR MEANS WITH THE MIXING CHAMBER, (J) MEANS COMMUNICATING WITH THE RECEIVING CHAMBER FOR FEEDING SAND AND GRAVEL SELECTIVELY THERETO, AND (K) DELIVERY MEANS COMMUNICATING THE UPPER END OF THE CONVEYOR MEANS SELECTIVELY WITH THE SAND AND GRAVEL HOPPERS FOR DELIVERING SAND AND GRAVEL TO SAID RESPECTIVE HOPPERS FROM THE RECEIVING CHAMBERS BY SAID ELEVATING CONVEYOR MEANS.
References Cited (Backward Citations)
US750949A
Cited
US1611297A
Cited
US2285765A
Cited
US2800312A
Cited
US2976025A
Cited
US3139271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |