US3692192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cushion lift pad arrangement
Assignee: SALA MACHINE WORKS Ltd A CORP OF CANADA
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Filing: 1971-06-18
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Granted: 1972-09-19
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Expires: 1991-06-18
Abstract
Abstract An air cushion lift pad arrangement comprises a flat supporting plate having a flat flexible diaphragm sheet adjacent to it and a flat clamping plate with at least one opening therein adjacent to the diaphragm and fixed to the supporting plate. The diaphragm is also fixed centrally of the opening to the supporting plate and means are provided to introduce pressurized air into the interface between the supporting plate and the diaphragm in the uncovered area. There are perforations in the diaphragm to permit the passage of air so as to transmit a force between the inflated diaphragm and a flat surface adjacent to it.
Inventors
- 👤 Roman Baldur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:44
CPC Classifications
B; B60; B60V; B60V3/00; B60V3/02; B60V3/025
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
An air cushion lifting pad arrangement comprising a supporting member; a flat flexible diaphragm; a flat clamping plate having at least one opening therein and overlying said diaphragm so as to leave an uncovered area and being connected to said supporting member; means for attaching said diaphragm centrally of said opening to said supporting member; means to introduce pressurized air between said supporting member and said uncovered area of said diaphragm, and perforations in said uncovered area of said diaphragm to permit the passage of air therethrough whereby to support a force on an air cushion produced thereby.
Claim 2
Dependent Claim
98 words
An air cushion lifting pad arrangement comprising a supporting member; a flat flexible diaphragm; a flat clamping plate having at least one opening therein and overlying said diaphragm so as to leave an uncovered area and being connected to said supporting member; means for attaching said diaphragm centrally of said opening to said supporting member; means to introduce pressurized air between said supporting member and said uncovered area of said diaphragm, and perforations in said uncovered area of said diaphragm to permit the passage of air therethrough whereby to support a force on an air cushion produced thereby.
Claim 3
Dependent Claim
23 words
An air cushion lifting pad arrangement as recited in claim 1 wherein said perforations are displaced in close proximity to said attaching means.
Claim 4
Dependent Claim
22 words
An air cushion lifting pad arrangement as recited in claim 1, wherein there are a plurality of openings in said clamping plate.
Claim 5
Dependent Claim
16 words
An air cushion lifting pad arrangement as recited in claim 3 wherein said openings are circular.
Claim 6
Dependent Claim
16 words
An air cushion lifting pad arrangement as recited in claim 3 wherein said openings are oval.
Claim 7
Dependent Claim
17 words
An air cushion lifting pad arrangement as recited in claim 3 wherein said openings are various shapes.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |