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US3121983A Expired / Lapsed US ⏱️ 0.0 years remaining

Drill grinding attachment

Assignee: Individual
•
Filing: 1959-02-05
•
Granted: 1964-02-25
•
Expires: 1979-02-05
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Abstract

No abstract record available.

Inventors

  • 👤 Harvey W English

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 08:02
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/24; B24B3/247

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 215 words
A DRILL SHARPENING ASSEMBLY COMPRISING A GRINDING WHEEL WITH A GRINDING SURFACE, AN ELONGATE HORIZONTAL TOOL REST HAVING SIDE WALLS DISPOSED PARALLEL TO SAID GRINDING SURFACE AND IN SPACED RELATIONSHIP THEREWITH, AN ELONGATE CLAMP SUPPORT MEMBER OF INVERTED CHANNEL CROSS SECTION DISPOSED ON THE TOP OF SAID REST WITH THE SIDE WALLS OF SAID INVERTED CHANNEL SECTION ENGAGING THE SIDE WALLS OF SAID REST, A PAIR OF DRILL CLAMPING PLATE MEMBERS FOR HOLDING A DRILL THEREBETWEEN, COOPERATING ELONGATE GUIDE MEANS CARRIED BY SAID SUPPORT MEMBER AND SAID PLATES FOR FREE SLIDING GUIDED MOVEMENT OF SAID PLATES ON SAID SUPPORT MEMBER IN A FIXED STRAIGHT LINE OF MOVEMENT GENERALLY TOWARDS AND AWAY FROM THE GRINDING SURFACE, SAID COOPERATING GUIDE MEANS HOLDING SAID PLATES AGAINST LATERAL SHIFTING MOVEMENT OF SAID PLATES RELATIVE TO SAID SUPPORT MEMBER AND THEREBY PREVENTING SAID PLATES FROM DEVIATING FROM SAID FIXED LINE OF MOVEMENT, SAID PLATES AND GUIDE MEANS ALL COOPERATING TOGETHER TO MAINTAIN THE DRILL IN A HORIZONTAL PLANE AND AT AN ANGLE WITH THE TRANSVERSE AXIS OF SAID CLAMP SUPPORT MEMBER CORRESPONDING TO THE DESIRED PITCH ANGLE OF THE DRILL POINT, AND STOP MEANS MOUNTED ON ONE OF SAID MEMBERS FOR ENGAGING THE OTHER OF SAID MEMBERS AND THEREBY LIMITING THE FORWARD MOVEMENT OF SAID PLATES TOWARDS SAID GRINDING WHEEL.

References Cited (Backward Citations)

US1576311A Cited
US2455562A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1967-02-24 1967-08-26 1968-02-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1971-02-24 1971-08-26 1972-02-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1975-02-24 1975-08-26 1976-02-25 $7700.00 Window Closed / Lapsed

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