Patent US3158381A successfully refreshed from Google Patents.
US3158381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum chuck
Assignee: AMAGASAKI KOSAKUSHO KK
•
Filing: 1962-10-11
•
Granted: 1964-11-24
•
Expires: 1982-10-11
Abstract
No abstract record available.
Inventors
- 👤 Yamamura Shinjiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:06
CPC Classifications
B; B25; B25B; B25B11/00; B25B11/005; Y; Y10; Y10T; Y10T279/00; Y10T279/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN A VACUUM CHUCK, THE COMBINATION COMPRISING A CHUCK BOARD HAVING A WORK HOLDING SURFACE AND A PLURALITY OF SURFACE OPENINGS, AN ANNULAR GROOVE IN SAID WORK HOLDING SURFACE FOR EACH SURFACE OPENING SURROUNDING THE SAME IN CONCENTRIC RELATIONSHIP, AN ANNULAR SUCKER BODY OF ELASTIC MATERIAL FOR EACH SURFACE OPENING, SAID SUCKER BODY HAVING AN ANNULAR PORTION MOUNTED IN ITS CORRESPONDING ANNULAR GROOVE AND HAVING A CENTRAL FLEXIBLE PORTION COVERING ITS CORRESPONDING OPENING, SAID FLEXIBLE PORTION HAVING ONE SIDE FACING A WORKPIECE AND HAVING AN OPPOSITE SIDE FACING ITS CORRESPONDING OPENING, PASSAGE MEAN IN SAID CHUCK BOARD COMMUNICATING WITH SAID SURFACE OPENINGS, AND EVACUATION MEANS INCLUDING PUMP MEANS COMMUNICATING WITH SAID PASSAGE MEANS AND BEING OPERATIVE TO FLEX SAID FLEXIBLE PORTION INWARDLY INTO ITS CORRESPONDING OPENING TO CREATE A VACUUM BETWEEN THE ONE SIDE OF SAID FLEXIBLE PORTION AND THE WORKPIECE.
Claim 2
Dependent Claim
141 words
IN A VACUUM CHUCK, THE COMBINATION COMPRISING A CHUCK BOARD HAVING A WORK HOLDING SURFACE AND A PLURALITY OF SURFACE OPENINGS, AN ANNULAR GROOVE IN SAID WORK HOLDING SURFACE FOR EACH SURFACE OPENING SURROUNDING THE SAME IN CONCENTRIC RELATIONSHIP, AN ANNULAR SUCKER BODY OF ELASTIC MATERIAL FOR EACH SURFACE OPENING, SAID SUCKER BODY HAVING AN ANNULAR PORTION MOUNTED IN ITS CORRESPONDING ANNULAR GROOVE AND HAVING A CENTRAL FLEXIBLE PORTION COVERING ITS CORRESPONDING OPENING, SAID FLEXIBLE PORTION HAVING ONE SIDE FACING A WORKPIECE AND HAVING AN OPPOSITE SIDE FACING ITS CORRESPONDING OPENING, PASSAGE MEAN IN SAID CHUCK BOARD COMMUNICATING WITH SAID SURFACE OPENINGS, AND EVACUATION MEANS INCLUDING PUMP MEANS COMMUNICATING WITH SAID PASSAGE MEANS AND BEING OPERATIVE TO FLEX SAID FLEXIBLE PORTION INWARDLY INTO ITS CORRESPONDING OPENING TO CREATE A VACUUM BETWEEN THE ONE SIDE OF SAID FLEXIBLE PORTION AND 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) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |