Patent US3366632A successfully refreshed from Google Patents.
Patent US3327641A successfully refreshed from Google Patents.
US3327641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete pump
Assignee: AIR PLACEMENT EQUIPMENT CO Inc
•
Filing: 1965-03-08
•
Granted: 1967-06-27
•
Expires: 1985-03-08
Abstract
No abstract record available.
Inventors
- 👤 Richard L Klosterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:52
CPC Classifications
F; F04; F04B; F04B7/00; F04B7/0019; F04B7/003; F01; F01L; F01L25/00; F01L25/02; F01L25/04; F01L25/06; F04B15/00; F04B15/02; F04B15/023; F04B53/00; F04B53/14; F04B7/02; F04B7/0266; F04B9/00; F04B9/08; F04B9/10; F04B9/109; F04B9/117; F04B9/1176; F04B9/1178; Y; Y10; Y10S; Y10S417/00; Y10S417/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN A CONCRETE PUMP: A CYLINDER; A PISTON RECIPROCABLE IN THE CYLINDER TOWARD AND AWAY FROM ONE END OF THE LATTER; A CONDUIT COMMUNICATING WITH THE CYLINDER AT SAID END OF THE LATTER, SAID CONDUIT HAVING A CONCRETE INLET, BEING TAPERED, PRORESSIVELY INCREASING IN DIAMETER AS THE CYLINDER IS APPROACHED, PREVENTING A SWAGE, AND HAVING AN OUTLET REMOTE FROM THE INLET AND FROM THE CYLINDER, THE RECIPROCATION OF THE PISTON IN ONE DIRECTION TERMINATING WITHIN A PLANE TRANSVERSELY OF THE CYLINDER AND CONDUIT BETWEEN SAID END AND SAID CONDUIT, AND SAID TAPER BEGINNING AT SAID PLANE, WHEREBY INHERENT SCOURING ACTION OF CONCRETE IN THE CONDUIT BEGINS IMMEDIATELY AT SAID PLANE DURING MOVEMENT OF THE CONCRETE TOWARD SAID OUTLET BY THE PISTON MOVING IN SAID ONE DIRECTION, THEREBY PRECLUDING UNDESIRED ACCUMULATION OF CONCRETE COMPONENTS AT A ZONE IN THE CONDUIT ADJACENT THE CYLINDER.
Claim 2
Dependent Claim
142 words
IN A CONCRETE PUMP: A CYLINDER; A PISTON RECIPROCABLE IN THE CYLINDER TOWARD AND AWAY FROM ONE END OF THE LATTER; A CONDUIT COMMUNICATING WITH THE CYLINDER AT SAID END OF THE LATTER, SAID CONDUIT HAVING A CONCRETE INLET, BEING TAPERED, PRORESSIVELY INCREASING IN DIAMETER AS THE CYLINDER IS APPROACHED, PREVENTING A SWAGE, AND HAVING AN OUTLET REMOTE FROM THE INLET AND FROM THE CYLINDER, THE RECIPROCATION OF THE PISTON IN ONE DIRECTION TERMINATING WITHIN A PLANE TRANSVERSELY OF THE CYLINDER AND CONDUIT BETWEEN SAID END AND SAID CONDUIT, AND SAID TAPER BEGINNING AT SAID PLANE, WHEREBY INHERENT SCOURING ACTION OF CONCRETE IN THE CONDUIT BEGINS IMMEDIATELY AT SAID PLANE DURING MOVEMENT OF THE CONCRETE TOWARD SAID OUTLET BY THE PISTON MOVING IN SAID ONE DIRECTION, THEREBY PRECLUDING UNDESIRED ACCUMULATION OF CONCRETE COMPONENTS AT A ZONE IN THE CONDUIT ADJACENT THE CYLINDER.
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) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |