US3611639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrading machines
Assignee: Abrasive Developments Ltd
•
Filing: 1969-08-19
•
Granted: 1971-10-12
•
Expires: 1989-08-19
Abstract
Abstract THE SPECIFICATION DISCLOSES AN ABRADING MACHINE AND METHOD IN WHICH AIR AND ABRASIVE ARE DIRECTED AT A WORKPIECE IN A BLASTING CHAMBER WHICH IS SEALED DURING OPERATION BY THE WORKPIECE. THE ABRASIVE IS ENTRAINED IN PRIMARY AIR, SECONDARY AIR ENTERS THE CHAMBER AROUND THE WORKPIECE AND TERTIARY AIR IS ALLOWED TO MIX WITH PRIMARY AIR CARRYING THE ABRASIVE BEFORE THGE LATTER ENTERS THE CHAMBER. THE CHAMBE MAY BE TUBULAR AND FRO TREATING WIRE OR BAR MAY BE IN TWO CHANNEL-SHAPED PARTS HINGED TOGETHER SO THAT THE CHAMBER MAY BE OPENED TO LEAD THE WIRE OR BAR THROUGH. WHERE STRIP IS BEING TREATED THE STRIP MAY PASS THROUGH THE TUBULAR CHAMBER TRANSVERSE TO THE AXIS THEREOF.
Inventors
- 👤 Stewart Ives Ashworth
- 👤 Anthony Gerard Field
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:02
CPC Classifications
B; B24; B24C; B24C3/00; B24C3/08; B24C3/10; B24C3/12; B24C9/00; B24C9/003
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |