Patent US3219792A successfully refreshed from Google Patents.
US3219792A
Expired / Lapsed
US
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Electron beam vacuum welding system with walking seal
Assignee: Rohr Inc
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Filing: 1963-07-23
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Granted: 1965-11-23
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Expires: 1983-07-23
Abstract
No abstract record available.
Inventors
- 👤 Donald E Pederson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:34
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/18; B; B23; B23K; B23K15/00; B23K15/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A WALKING SEAL COMPRISING INNER AND OUTER VACUUM CUPS, MEANS FOR DRAWING A VACUUM ON SAID CUPS WHILE POSITIONED IN RELEASABLY SEALED ENGAGEMENT WITH THE SURFACE OF A WORKPIECE, AND MEANS FOR ALTERNATELY REDUCING THE VAUUM OF THE OUTER CUP TO NEAR ATMOSPHERIC PRESSURE SURROUNDING SAID CUP AND RESTORING THE VACUUM THEREIN TO NEAR EQUALITY WITH THE VACUUM WITHIN THE INNER CUP RESPCTIVELY, THEREBY ALTERNATELY TO BREAK THE VACUUM SEALS OF SAID CUPS WITH SAID SURFACE AND PERMIT SLIDING MOVEMENT THEREOVER IN RESPONSE TO UNITARY MOVEMENT OF SAID CUPS RELATIVE TO THE WORKPIECE.
Claim 2
Dependent Claim
93 words
A WALKING SEAL COMPRISING INNER AND OUTER VACUUM CUPS, MEANS FOR DRAWING A VACUUM ON SAID CUPS WHILE POSITIONED IN RELEASABLY SEALED ENGAGEMENT WITH THE SURFACE OF A WORKPIECE, AND MEANS FOR ALTERNATELY REDUCING THE VAUUM OF THE OUTER CUP TO NEAR ATMOSPHERIC PRESSURE SURROUNDING SAID CUP AND RESTORING THE VACUUM THEREIN TO NEAR EQUALITY WITH THE VACUUM WITHIN THE INNER CUP RESPCTIVELY, THEREBY ALTERNATELY TO BREAK THE VACUUM SEALS OF SAID CUPS WITH SAID SURFACE AND PERMIT SLIDING MOVEMENT THEREOVER IN RESPONSE TO UNITARY MOVEMENT OF SAID CUPS RELATIVE TO THE WORKPIECE.
References Cited (Backward Citations)
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Cited
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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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |