Patent US3397928A successfully refreshed from Google Patents.
US3397928A
Expired / Lapsed
US
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Seal means for drill bit bearings
Assignee: Individual
•
Filing: 1965-11-08
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Granted: 1968-08-20
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Expires: 1985-11-08
Abstract
No abstract record available.
Inventors
- 👤 Edward M Galle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:23
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; E21B10/25; F; F16; F16C; F16C33/00; F16C33/72; F16C33/76; F16C2352/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
SEAL MEANS FOR DRILL BIT BERAINGS, SAID SEAL MEANS COMPRISING: A SHAFT RIGIDLY SECURED TO A DRILL BIT BODY AND HAVING A BEARING SURFACE FORMED THEREON; A CUTTER ELEMENT ROTATABLY MOUNTED TO SAID SHAFT AND HAVING A BEARING SURFACE THEREON THAT OPPOSES AND ENGAGES THE BEARING SURFACE ON SAID SHAFT, ONE OF SAID SURFACES HAVING A CIRCUMFERENTIAL GROOVE THEREIN; AND A RESILIENT PACKING RING POSITIONED WITHIN SAID GROOVE, WITH SAID PACKING RING, SAID GROOVE AND AN OPPOSING SURFACE BEING SIZED SUCH THAT UPON ASSEMBLY OF THE CUTTER ELEMENT UPON THE SHAFT THE CROSS SECTIONAL THICKNESS OF SAID RING IS COMPRESSED BY NOT LESS THAN SUBSTANTIALLY TEN PERCENT OF ITS THICKNESS PRIOR TO ASSEMBLY OF THE CUTTER ELEMENT UPON THE SHAFT.
Claim 2
Dependent Claim
120 words
SEAL MEANS FOR DRILL BIT BERAINGS, SAID SEAL MEANS COMPRISING: A SHAFT RIGIDLY SECURED TO A DRILL BIT BODY AND HAVING A BEARING SURFACE FORMED THEREON; A CUTTER ELEMENT ROTATABLY MOUNTED TO SAID SHAFT AND HAVING A BEARING SURFACE THEREON THAT OPPOSES AND ENGAGES THE BEARING SURFACE ON SAID SHAFT, ONE OF SAID SURFACES HAVING A CIRCUMFERENTIAL GROOVE THEREIN; AND A RESILIENT PACKING RING POSITIONED WITHIN SAID GROOVE, WITH SAID PACKING RING, SAID GROOVE AND AN OPPOSING SURFACE BEING SIZED SUCH THAT UPON ASSEMBLY OF THE CUTTER ELEMENT UPON THE SHAFT THE CROSS SECTIONAL THICKNESS OF SAID RING IS COMPRESSED BY NOT LESS THAN SUBSTANTIALLY TEN PERCENT OF ITS THICKNESS PRIOR TO ASSEMBLY OF THE CUTTER ELEMENT UPON THE SHAFT.
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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) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |