Patent US4166695A successfully refreshed from Google Patents.
US3286406A
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Method and apparatus for abrading
Assignee: Abrasive Developments Ltd
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Filing: 1964-02-26
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Granted: 1966-11-22
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Expires: 1984-02-26
Abstract
No abstract record available.
Inventors
- 👤 Ashworth Stewart Ives
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:31
CPC Classifications
B; B24; B24C; B24C3/00; B24C3/02; B24C3/06; B24C3/065; B24C5/00; B24C5/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
130 words
APPARATUS FOR ABRADING A SURFACE ON A WORKPIECE COMPRISING A BLASTING CHAMBER, A PRIMARY AIR INLET CONDUIT CONNECTED AT ONE END TO THE BLASTING CHAMBER, MEANS FOR ENTRAINING ABRASIVE IN THE PRIMARY AIR FLOWING THROUGH THE CONDUIT UP-STREAM OF ITS ENTRY INTO THE BLASTING CHAMBER, APERTURE MEANS IN THE WALL OF THE CHAMBER TO BE CLOSED BY SAID WORKPIECE, MEANS FOR APPLYING SUCTION TO SAID CHAMBER TO DRAW PRIMARY AIR AND ABRASIVE INTO THE CHAMBER AND REMOVE AIR AND SPENT ABRASIVE FROM THE CHAMBER WHEN SAID APERTURE MEANS IS CLOSED BY THE WORKPIECE, MEANS FOR DIRECTING ABRASIVE ENTERING THE CHAMBER AGAINST SAID SURFACE AND MEANS FOR RESTRICTING THE ENTRY OF SECONDARY AIR INTO THE CHAMBER AROUND THE PERIPHERY OF THE APERTURE MEANS WHEN THE LATTER IS CLOSED BY THE WORKPIECE.
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |