US3253357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater excavating device
Assignee: Individual
•
Filing: 1963-05-27
•
Granted: 1966-05-31
•
Expires: 1983-05-27
Abstract
No abstract record available.
Inventors
- 👤 Allard Pierre Jean-Ma Theodore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:36
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/90; E02F3/92; E02F3/9212; E02F3/9225; E02F3/9231
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
AN UNDERWATER EARTH EXCAVATING DEVICE COMPRISING: A PUMP CASING; A PUMP ROTOR WITHIN SAID CASING, SAID CASING HAVING AN OUTLET FORMED THEREIN; A HOLLOW FRUSTOCONICAL INLET MEMBER COAXIAL WITH SAID ROTOR, THE SMALLER BASE PORTION OF SAID INLET MEMBER BEING CONNECTED TO THE INLET PORTION OF SAID ROTOR FOR ROTATION THEREWITH; MEANS DEFINING AN ANNULAR APERTURE IN SAID CASING COAXIALLY SURROUNDING SAID INLET MEMBER INTERMEDIATE ITS ENS; SEPARATE BLADES INCLUDED IN SAID ROTOR AND SURROUNDING SAID APERTURE WITHIN SAID CASING FOR DELIVERING MATERIAL EXTERIORLY OF SAID INLET MEMBER FROM SAID ANNULAR APERTURE TO SAID OUTLET; AN ANNULAR SERIES OF CUTTER BLADES CARRIED BY THE LARGER BASE PORTION OF SAID INLET MEMBER EXTERIORLY OF SAID HOUSING, SAID CUTTER BLADES EXTENDING GENERALLY RADIALLY OUTWARDLY BEYOND SAID INLET MEMBER FOR CUTTING ENGAGEMENT WITH THE EARTH TO BE EXCAVATED; AND MOROT MEANS FOR DRIVING SAID ROTOR.
Claim 2
Dependent Claim
142 words
AN UNDERWATER EARTH EXCAVATING DEVICE COMPRISING: A PUMP CASING; A PUMP ROTOR WITHIN SAID CASING, SAID CASING HAVING AN OUTLET FORMED THEREIN; A HOLLOW FRUSTOCONICAL INLET MEMBER COAXIAL WITH SAID ROTOR, THE SMALLER BASE PORTION OF SAID INLET MEMBER BEING CONNECTED TO THE INLET PORTION OF SAID ROTOR FOR ROTATION THEREWITH; MEANS DEFINING AN ANNULAR APERTURE IN SAID CASING COAXIALLY SURROUNDING SAID INLET MEMBER INTERMEDIATE ITS ENS; SEPARATE BLADES INCLUDED IN SAID ROTOR AND SURROUNDING SAID APERTURE WITHIN SAID CASING FOR DELIVERING MATERIAL EXTERIORLY OF SAID INLET MEMBER FROM SAID ANNULAR APERTURE TO SAID OUTLET; AN ANNULAR SERIES OF CUTTER BLADES CARRIED BY THE LARGER BASE PORTION OF SAID INLET MEMBER EXTERIORLY OF SAID HOUSING, SAID CUTTER BLADES EXTENDING GENERALLY RADIALLY OUTWARDLY BEYOND SAID INLET MEMBER FOR CUTTING ENGAGEMENT WITH THE EARTH TO BE EXCAVATED; AND MOROT MEANS FOR DRIVING SAID ROTOR.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |