Patent US4257637A successfully refreshed from Google Patents.
US4257637A
Expired / Lapsed
US
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Contactless air film lifting device
Assignee: International Business Machines Corp
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Filing: 1979-09-28
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Granted: 1981-03-24
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Expires: 1999-09-28
Abstract
Abstract A contactless air film lift-up device constructed to utilize the pressure-velocity relationship expressed in the Bernoulli principle to provide a desired pick-up action, while at the same time generating a lateral restraining force through a further utilization of the Bernoulli principle.
Inventors
- 👤 Javathu K. Hassan
- 👤 John A. Paivanas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:06
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/02; B66C1/0218; B66C1/0256; B66C1/0268
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A pick-up device for objects comprising a head having a gas flow boundary surface, a first opening in said surface, a gas supply duct connected to said first opening for conveying a gas to said opening, means radially spaced from said first opening for directing a flow of said gas to a second opening adjacent said first opening whereby an object to be picked up is restrained from lateral movement by gas flow forces without the need to provide radially spaced restraining means as the axi-radial forces of the gas flow create sufficient suction to pick up the object.
Claim 2
Dependent Claim
99 words
A pick-up device for objects comprising a head having a gas flow boundary surface, a first opening in said surface, a gas supply duct connected to said first opening for conveying a gas to said opening, means radially spaced from said first opening for directing a flow of said gas to a second opening adjacent said first opening whereby an object to be picked up is restrained from lateral movement by gas flow forces without the need to provide radially spaced restraining means as the axi-radial forces of the gas flow create sufficient suction to pick up the object.
Claim 3
Dependent Claim
31 words
A pick-up device in accordance with claim 1 wherein said radially spaced means comprises a plurality of radially spaced ports, said ports being in fluid communication with said second annular opening.
Claim 4
Dependent Claim
23 words
A pick-up device in accordance with claim 2 wherein said ports are radially spaced equidistant from the center line of said first opening.
Claim 5
Dependent Claim
15 words
A pick-up device in accordance with claim 3 wherein said ports have equidistant angular spacing.
Claim 6
Dependent Claim
27 words
A pick-up device in accordance with claims 2, 3 or 4 wherein the horizontal plane of said ports is below the horizontal plane of said first opening.
Claim 7
Dependent Claim
27 words
A pick-up device in accordance with claims 2, 3 or 4 wherein the horizontal plane of said ports is above the horizontal plane of said first opening.
Claim 8
Dependent Claim
28 words
A pick-up device in accordance with claims 2, 3 or 4 wherein the horizontal plane of said ports is coextensive with the horizontal plane of said first opening.
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) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |