US3284960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lapping machines
Assignee: Spitfire Tool and Machine Co Inc
•
Filing: 1964-01-06
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Granted: 1966-11-15
•
Expires: 1984-01-06
Abstract
No abstract record available.
Inventors
- 👤 Lawrence O Day
- 👤 Dobrick Joseph
- 👤 Kay Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:01
CPC Classifications
B; B24; B24B; B24B37/00; B24B37/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A LAPPING MACHINE FOR LAPPING THE RECESSED SURFACE OF A WORKPIECE, COMPRISING (A) A TABLE ROTATABLE ABOUT A VERTICAL AXIS, (B) A RING SUPPORTED ON THE SURFACE OF THE TABLE FOR ROTATION RELATIVE TO THE TABLE ABOUT A VERTICAL AXIS SPACED FROM THE VERTICAL AXIS OF SAID TABLE, (C) MEANS FOR RETAINING SAID RING AGAINST ROTATION ABOUT SAID TABLE AXIS BUT NOT ABOUT SAID RING AXIS, (D) A DISC ARRANGED IN SAID RING FOR ROTATION THEREWITH, (E) MEANS PROVIDED BY SAID DISC FOR HOLDING THE WORKPIECE THEREON, (F) A PLURALITY OF CONCENTRICALLY ARRANGED LAPPING HEADS ENGAGING SAID RECESSED SURFACE FOR LAPPING THE SAME, (G) AND MEANS FOR ROTATING THE LAPPING HEADS CONCENTRICALLY OVER AND IN CONTACT WITH SAID RECESSED SURFACE.
Claim 2
Dependent Claim
120 words
A LAPPING MACHINE FOR LAPPING THE RECESSED SURFACE OF A WORKPIECE, COMPRISING (A) A TABLE ROTATABLE ABOUT A VERTICAL AXIS, (B) A RING SUPPORTED ON THE SURFACE OF THE TABLE FOR ROTATION RELATIVE TO THE TABLE ABOUT A VERTICAL AXIS SPACED FROM THE VERTICAL AXIS OF SAID TABLE, (C) MEANS FOR RETAINING SAID RING AGAINST ROTATION ABOUT SAID TABLE AXIS BUT NOT ABOUT SAID RING AXIS, (D) A DISC ARRANGED IN SAID RING FOR ROTATION THEREWITH, (E) MEANS PROVIDED BY SAID DISC FOR HOLDING THE WORKPIECE THEREON, (F) A PLURALITY OF CONCENTRICALLY ARRANGED LAPPING HEADS ENGAGING SAID RECESSED SURFACE FOR LAPPING THE SAME, (G) AND MEANS FOR ROTATING THE LAPPING HEADS CONCENTRICALLY OVER AND IN CONTACT WITH SAID RECESSED SURFACE.
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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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |