Patent US3302347A successfully refreshed from Google Patents.
US3302347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive anchors with retaining flukes
Assignee: VAN ZELM ASSOCIATES Inc
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Filing: 1964-11-27
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Granted: 1967-02-07
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Expires: 1984-11-27
Abstract
No abstract record available.
Inventors
- 👤 Martin A Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:37
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/74; E02D5/80; E02D5/805
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
AN ANCHORING DEVICE COMPRISING A CENTRAL SHAFT HAVING AFFIXED THERETO A PLURALITY OF FLUKES, EACH SAID FLUKE CONSISTING OF A SINGLE PIECE OF MATERIAL HAVING A LOWER PORTION WHOSE INNER EDGE IS AFFIXED TO SAID SHAFT AND WHOSE OUTER EDGE IS TAPERED IN A DIRECTION DIVERGENT FROM THE SHARPENED POINT OF SAID SHAFT, SAID FLUKE HAVING AN UPPER PORTION SPACED FROM SAID SHAFT, THE EDGES OF WHICH ARE GENERALLY PARALLEL THERETO, SAID UPPER AND LOWER PORTIONS OF SAID FLUKE HAVING THEREBETWEEN A CROSS-SECTION SUBSTANTIALLY LESS THAN THE GENERAL THICKNESS OF SAID FLUKE, ALONG WHICH SAID CROSS-SECTION, SAID FLUKE WILL BEND WHEN A FORCE IS APPLIED TO SAID ANCHORING DEVICE.
Claim 2
Dependent Claim
109 words
AN ANCHORING DEVICE COMPRISING A CENTRAL SHAFT HAVING AFFIXED THERETO A PLURALITY OF FLUKES, EACH SAID FLUKE CONSISTING OF A SINGLE PIECE OF MATERIAL HAVING A LOWER PORTION WHOSE INNER EDGE IS AFFIXED TO SAID SHAFT AND WHOSE OUTER EDGE IS TAPERED IN A DIRECTION DIVERGENT FROM THE SHARPENED POINT OF SAID SHAFT, SAID FLUKE HAVING AN UPPER PORTION SPACED FROM SAID SHAFT, THE EDGES OF WHICH ARE GENERALLY PARALLEL THERETO, SAID UPPER AND LOWER PORTIONS OF SAID FLUKE HAVING THEREBETWEEN A CROSS-SECTION SUBSTANTIALLY LESS THAN THE GENERAL THICKNESS OF SAID FLUKE, ALONG WHICH SAID CROSS-SECTION, SAID FLUKE WILL BEND WHEN A FORCE IS APPLIED TO SAID ANCHORING DEVICE.
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |