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US3307869A
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Vacuum lifting pad
Assignee: BANBURY Manufacturing CORP
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Filing: 1965-03-15
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Granted: 1967-03-07
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Expires: 1985-03-15
Abstract
No abstract record available.
Inventors
- 👤 Richard M Warfel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:55
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/02; B66C1/0231; B66C1/0212; B66C1/0293
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A VACUUM LIFTING PAD, COMPRISING A SUBSTANTIALLY HORIZONTAL SUPPORTING MEMBER ADAPTED TO BE RAISED AND LOWERED, A FLEXIBLE SHEET-LIKE SEALING RING BENEATH SAID MEMBER SECURED THERETO IN AN AREA SPACED INWARDLY FROM THE OUTER EDGE OF THE RING, THE RING EXTENDING DOWNWARD FROM THE SUPPORTING MEMBER AND OUTWARD, AND SEPARATE SPRING MEANS CARRIED BY SAID MEMBER FOR ENGAGING THE UPPER SURFACE OF SAID RING TO RESIST UPWARD FLEXING OF THE RING, SAID SUPPORTING MEMBER BEING PROVIDED WITH AN EVACUATING OPENING SURROUNDED BY SAID RING.
Claim 2
Dependent Claim
84 words
A VACUUM LIFTING PAD, COMPRISING A SUBSTANTIALLY HORIZONTAL SUPPORTING MEMBER ADAPTED TO BE RAISED AND LOWERED, A FLEXIBLE SHEET-LIKE SEALING RING BENEATH SAID MEMBER SECURED THERETO IN AN AREA SPACED INWARDLY FROM THE OUTER EDGE OF THE RING, THE RING EXTENDING DOWNWARD FROM THE SUPPORTING MEMBER AND OUTWARD, AND SEPARATE SPRING MEANS CARRIED BY SAID MEMBER FOR ENGAGING THE UPPER SURFACE OF SAID RING TO RESIST UPWARD FLEXING OF THE RING, SAID SUPPORTING MEMBER BEING PROVIDED WITH AN EVACUATING OPENING SURROUNDED BY SAID RING.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |