US3347327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic lifting device and weighing means for flat goods
Assignee: Maschinenfabrik Hasenclever AG
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Filing: 1964-10-21
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Granted: 1967-10-17
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Expires: 1984-10-21
Abstract
No abstract record available.
Inventors
- 👤 Engelen Heinz
- 👤 Dischler Helmut
- 👤 Albert Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:29
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/02; B66C1/0212; B25; B25B; B25B11/00; B25B11/005; B65; B65G; B65G47/00; B65G47/74; B65G47/90; B65G47/91; B66C1/0231; B66C1/0237; B66C1/0243; G; G01; G01G; G01G5/00; G01G5/006
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
172 words
A LIFTING DEVICE FOR FLAT GOODS, COMPRISING A CYLINDER WITH A SUBSTANTIALLY VERTICAL AXIS, A PISTON HEAD AXIALLY MOVABLE IN SAID CYLINDER, SUSPENSION MEANS FOR SAID CYLINDER INCLUDING A ROD SLIDABLY EXTENDING AXIALLY INTO SAID CYLINDER FROM ABOVE AND ENGAGING SAID PISTON HEAD, SAID CYLINDER HAVING A BOTTOM PROVIDED WITH AN OPENING, AND AT LEAST ONE SUCTION HEAD SUPPORTED BY SAID CYLINDER, SAID SUCTION HEAD COMMUNICATING WITH SAID OPENING FOR DEVELOPING A PARTIAL VACUUM UPON SEPARATION OF SAID PISTON HEAD FROM SAID BOTTOM IN RESPONSE TO A LIFTING FORCE EXERTED UPON SAID ROD, SAID BOTTOM BEING PROVIDED WITH A DEPRESSION IN LINE WITH SAID ROD, SAID OPENING TERMINATING IN SAID DEPRESSION, SAID ROD SLIDABLY TRAVERSING SAID PISTON HEAD AND TERMINATING IN AN ENLARGED LOWER EXTREMITY ENGAGEABLE WITH THE UNDERSIDE OF SAID PISTON HEAD, SAID EXTREMITY BEING RECEIVABLE IN SAID DEPRESSION, SAID PISTON HEAD BEING PROVIDED WITH AT LEAST ONE VENTING CJANNEL BLOCKED BY SAID EXTREMITY UPON CONTACT THEREOF WITH SAID UNDERSIDE AND UNBLOCKED UPON A LOWERING OF SAID EXTREMITY INTO SAID DEPRESSION.
Claim 2
Dependent Claim
172 words
A LIFTING DEVICE FOR FLAT GOODS, COMPRISING A CYLINDER WITH A SUBSTANTIALLY VERTICAL AXIS, A PISTON HEAD AXIALLY MOVABLE IN SAID CYLINDER, SUSPENSION MEANS FOR SAID CYLINDER INCLUDING A ROD SLIDABLY EXTENDING AXIALLY INTO SAID CYLINDER FROM ABOVE AND ENGAGING SAID PISTON HEAD, SAID CYLINDER HAVING A BOTTOM PROVIDED WITH AN OPENING, AND AT LEAST ONE SUCTION HEAD SUPPORTED BY SAID CYLINDER, SAID SUCTION HEAD COMMUNICATING WITH SAID OPENING FOR DEVELOPING A PARTIAL VACUUM UPON SEPARATION OF SAID PISTON HEAD FROM SAID BOTTOM IN RESPONSE TO A LIFTING FORCE EXERTED UPON SAID ROD, SAID BOTTOM BEING PROVIDED WITH A DEPRESSION IN LINE WITH SAID ROD, SAID OPENING TERMINATING IN SAID DEPRESSION, SAID ROD SLIDABLY TRAVERSING SAID PISTON HEAD AND TERMINATING IN AN ENLARGED LOWER EXTREMITY ENGAGEABLE WITH THE UNDERSIDE OF SAID PISTON HEAD, SAID EXTREMITY BEING RECEIVABLE IN SAID DEPRESSION, SAID PISTON HEAD BEING PROVIDED WITH AT LEAST ONE VENTING CJANNEL BLOCKED BY SAID EXTREMITY UPON CONTACT THEREOF WITH SAID UNDERSIDE AND UNBLOCKED UPON A LOWERING OF SAID EXTREMITY INTO SAID DEPRESSION.
Claim 3
Dependent Claim
39 words
A LIFTING DEVICE AS DEFINED IN CLAIM 1 WHEREIN SAID CYLINDER IS PROVIDED WITH MANOMETER MEANS COMMUNICATING WITH THE INTERIOR OF SAID CYLINDER AT A LEVEL CLOSE TO SAID BOTTOM, SAID MANOMETER MEANS BEING CALIBRATED IN UNITS OF WEIGHT.
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) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |