Patent US3398802A successfully refreshed from Google Patents.
US3398802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid operated drill
Assignee: Aro Corp
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Filing: 1966-10-31
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Granted: 1968-08-27
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Expires: 1986-10-31
Abstract
No abstract record available.
Inventors
- 👤 Melvin D Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:38
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/02; A61C1/05
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
137 words
IN A DRILL INCLUDING AN ELONGATED TUBULAR HOUSING AND A MOTOR IN THE HOUSING, AND A COLLET IN THE HOUSING ADJACENT TO ONE END THEREOF AND DRIVABLY CONNECTED TO THE MOTOR, THE IMPROVEMENT IN THE COLLET WHICH COMPRISES A TUBULAR CASING DRIVABLY CONNECTED TO THE MOTOR AND TERMINATING AT ITS OUTER END IN AN INTERIOR CONICALLY TAPERED SURFACE, A CAM SLIDABLE IN THE CASING AND FORMED IN ITS END WITH A CONICALLY TAPERED RECESS FACING SAID SURFACE, A SLEEVE IN THE CASING WITH CONICALLY TAPERED ENDS TO ENGAGE THE SURFACE AND RECESS RESPECTIVELY AND HAVING OVERLAPPING SLOTS IN ITS SIDES EXTENDING ALTERNATELY FROM ITS OPPOSITE ENDS, A SPRING URGING THE CAM TOWARD THE SURFACE, AND A MANUALLY OPERABLE LEVER ON THE OUTSIDE OF THE HOUSING OPERABLY CONNECTED TO THE CAM TO MOVE IT AWAY FROM SAID SURFACE.
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) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |