US3266433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete pump
Assignee: Individual
•
Filing: 1965-01-21
•
Granted: 1966-08-16
•
Expires: 1985-01-21
Abstract
No abstract record available.
Inventors
- 👤 Merritt M Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:35
CPC Classifications
F; F04; F04B; F04B19/00; F04B19/02; F04B19/022; F01; F01L; F01L25/00; F01L25/08; F04B15/00; F04B15/02; F04B15/023; F04B49/00; F04B49/06; F04B7/00; F04B7/02; F04B7/0291; F04B9/00; F04B9/08; F04B9/10; F04B9/103; F04B9/105; F04B9/1056; Y; Y10; Y10S; Y10S417/00; Y10S417/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A CONCRETE PUMPING DEVICE, INCLUDING IN COMBINATION: A HOPPER FOR CONCRETE HAVING AN OPENING IN ITS LOWER END, A SUPPLY TUBE HAVING AN INLET OPENING IN ITS UPPER END ALIGNED WITH SAID HOPPER OPENING AND HAVING A CYLINDRICAL REAR END AND A CYLINDRICAL FORWARD END, A CYLINDER MOUNTED FOR RECIPROCATION IN SAID SUPPLY TUBE AND LONGER THAN SAID INLET OPENING, FOR MOVEMENT BETWEEN A REAR POSITION WHERE SAID CYLINDER IS WITHDRAWN FROM SAID INLET OPENING AND A FORWARD POSITION WHERE IT FULLY CLOSES SAID INLET OPENING AND CONFINES WITHIN ITSELF CONCRETE WHICH DROPPED BY GRAVITY FROM SAID HOPPER INTO SAID SUPPLY TUBE, A PISTON RECIPROCATABLE IN SAID CYLINDER FROM SAID REAR END TOWARD SAID FORWARD END, A GATE VALVE NORMALLY CLOSING THE FORWARD END OF SAID SUPPLY TUBE, FIRST HYDRAULIC MEANS FOR MOVING SAID CYLINDER BETWEEN ITS REAR POSITION AND ITS FORWARD POSITION, SECOND HYDRAULIC MEANS FOR OPENING AND CLOSING SAID GATE VALVE, AND THIRD HYDRAULIC MEANS FOR MOVING SAID PISTON BETWEEN ITS REAR POSITION AND ITS FORWARD POSITION.
Claim 2
Dependent Claim
169 words
A CONCRETE PUMPING DEVICE, INCLUDING IN COMBINATION: A HOPPER FOR CONCRETE HAVING AN OPENING IN ITS LOWER END, A SUPPLY TUBE HAVING AN INLET OPENING IN ITS UPPER END ALIGNED WITH SAID HOPPER OPENING AND HAVING A CYLINDRICAL REAR END AND A CYLINDRICAL FORWARD END, A CYLINDER MOUNTED FOR RECIPROCATION IN SAID SUPPLY TUBE AND LONGER THAN SAID INLET OPENING, FOR MOVEMENT BETWEEN A REAR POSITION WHERE SAID CYLINDER IS WITHDRAWN FROM SAID INLET OPENING AND A FORWARD POSITION WHERE IT FULLY CLOSES SAID INLET OPENING AND CONFINES WITHIN ITSELF CONCRETE WHICH DROPPED BY GRAVITY FROM SAID HOPPER INTO SAID SUPPLY TUBE, A PISTON RECIPROCATABLE IN SAID CYLINDER FROM SAID REAR END TOWARD SAID FORWARD END, A GATE VALVE NORMALLY CLOSING THE FORWARD END OF SAID SUPPLY TUBE, FIRST HYDRAULIC MEANS FOR MOVING SAID CYLINDER BETWEEN ITS REAR POSITION AND ITS FORWARD POSITION, SECOND HYDRAULIC MEANS FOR OPENING AND CLOSING SAID GATE VALVE, AND THIRD HYDRAULIC MEANS FOR MOVING SAID PISTON BETWEEN ITS REAR POSITION AND ITS FORWARD POSITION.
References Cited (Backward Citations)
CA529588A
Cited
US2854170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |