US3310892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submarine dredge
Assignee: John J Mcmullen Associates Inc
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Filing: 1963-12-31
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Granted: 1967-03-28
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Expires: 1983-12-31
Abstract
No abstract record available.
Inventors
- 👤 Ernest W Spannhake
- 👤 Prehn Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:47
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/8858
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN COMBINATION, A HOLLOW BODY WHICH IS ADAPTED TO BE SUBMERGED IN WATER; A HOLLOW SNORKEL TUBE WHICH HAS ONE END THAT IS ADAPTED TO FLOAT FREELY ABOVE WATER; A HOLLOW UNIVERSAL JOINT FOR PERMANENTLY CONNECTING THE OTHER END OF SAID SNORKEL TUBE TO SAID HOLLOW BODY, SAID UPPER END BEING UPWARDLY ELONGATED AND BEING NORMALLY FREE OF CONNECTION WITH A VESSEL SO AS TO RESPOND TO WAVE ACTION IN HEAVE ONLY IN COOPERATION WITH THE OTHER PARTS OF SAID SNORKEL TUBE AND THE UNIVERSAL JOINT; AND NONBUOYANT STREAMLINED BOW-SHAPED PLATES ATTACHED AT THE WATERLINE TO SAID SNORKEL TUBE AT THE FREE-FLOATING END OF SAID TUBE FOR MINIMIZING WAVE SLAP.
Claim 2
Dependent Claim
214 words
A SUBMARING DREDGE COMPRISING A HOLLOW SUBMERSIBLE BODY, SAID BODY BEING DIVIDED INTO COMPARTMENTS FOR HOUSING PERSONNEL, MACHINERY AND A SOURCE OF POWER FOR DRIVING THE BODY ALONG THE BOTTOM OF A BODY OF WATER TO DIG A TRENCH; A HOLLOW SNORKEL TUBE EXTENDING FROM SAID BODY ON AN INCLINE RELATIVE TO THE SURFACE OF SAID BODY OF WATER, THE UPPER END OF SAID SNORKEL TUBE BEING FREE-FLOATING UPON THE WATER; A HOLLOW UNIVERSAL JOINT FOR PERMANENTLY CONNECTING THE LOWER END OF SAID SNORKEL TUBE TO SAID BODY FOR TRANSFERRING PERSONNEL FROM SAID SNORKEL TUBE TO SAID SUBMERSIBLE BODY, SAID UPPER END BEING UPWARDLY ELONGATED AND BEING NORMALLY FREE OF CONNECTION WITH A VESSEL SO AS TO RESPOND TO WAVE ACTION IN HEAVE ONLY IN COOPERATION WITH THE OTHER PARTS OF SAID SNORKEL TUBE AND THE UNIVERSAL JOINT, THE UPPER PORTION OF SAID SNORKEL TUBE BEING BENT AT A POINT SLIGHTLY BELOW THE SURFACE OF SAID WATER SO THAT SAID UPPER PORTION EXTENDS NEARLY VERTICALLY FROM SAID WATER AT A MOMENT WHEN THE REMAINING PORTION OF SAID SNORKEL TUBE IS INCLINED BY AN ANGLE OF FORTY-FIVE DEGREES RELATIVE TO THE SURFACE OF SAID WATER; A LANDING CAGE; AND MEANS FOR SUPPORTING SAID CAGE IN HINGED RELATIONSHIP UPON SAID UPPER PORTION OF SAID SNORKEL TUBE.
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) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |