US3598198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material handling device with inflatable air pads
Assignee: Doosan Bobcat North America Inc
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Filing: 1970-01-12
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Granted: 1971-08-10
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Expires: 1990-01-12
Abstract
Abstract An air film pallet with a plurality of inflatable air pads connectable to a source of pressurized air through separate sonic flow restrictors. Each pad is connected to a separate air chamber through a separate flow restrictor located downstream of the associated sonic flow restrictor so that vertical oscillation is prevented.
Inventors
- 👤 Elgin S Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:03
CPC Classifications
B; B60; B60V; B60V3/00; B60V3/02; B60V3/025
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
63 words
A material-handling device comprising a load supporting member, an inflatable fluid pad mounted on said member, a fluidic capacitor mounted on said member, conduit means connected to said pad and connectable to a source of pressurized fluid, said conduit means including sonic flow restriction means and second flow restriction means connecting said capacitor to said pad downstream of said sonic flow restriction means.
Claim 2
Dependent Claim
63 words
A material-handling device comprising a load supporting member, an inflatable fluid pad mounted on said member, a fluidic capacitor mounted on said member, conduit means connected to said pad and connectable to a source of pressurized fluid, said conduit means including sonic flow restriction means and second flow restriction means connecting said capacitor to said pad downstream of said sonic flow restriction means.
Claim 3
Dependent Claim
109 words
For use with a source of pressurized fluid, a material-handling device comprising a frame, said frame being divided into a plurality of fluid chambers, a plurality of inflatable fluid pads connected to said frame, conduit means connected to each pad, said conduit means including an inlet connectable to the source of pressurized fluid and a plurality of sonic flow restrictors, each sonic flow restrictor being disposed between a different one of said pads and said inlet, and a plurality of second flow restrictors, each one of said second flow restrictors being connected between one of said chambers and one of said pads downstream of the associated sonic flow restrictor.
Claim 4
Dependent Claim
109 words
For use with a source of pressurized fluid, a material-handling device comprising a frame, said frame being divided into a plurality of fluid chambers, a plurality of inflatable fluid pads connected to said frame, conduit means connected to each pad, said conduit means including an inlet connectable to the source of pressurized fluid and a plurality of sonic flow restrictors, each sonic flow restrictor being disposed between a different one of said pads and said inlet, and a plurality of second flow restrictors, each one of said second flow restrictors being connected between one of said chambers and one of said pads downstream of the associated sonic flow restrictor.
Claim 5
Dependent Claim
122 words
For use with a source of pressurized air, a material-handling device comprising a load-supporting member, said member including a frame, said frame being divided into a plurality of air chambers, a plurality of inflatable air pads mounted on said member, conduit means connected to each one of said pads, said conduit means including an inlet connectable to the source of pressurized fluid, a plurality of sonic flow restrictors disposed in said conduit means, each sonic flow restrictor being located between a different one of said pads and said inlet, and a plurality of second flow restrictors, each one of said second flow restrictors being connected between one of said chambers and one of said pads downstream of the associated sonic flow restrictor.
Claim 6
Dependent Claim
122 words
For use with a source of pressurized air, a material-handling device comprising a load-supporting member, said member including a frame, said frame being divided into a plurality of air chambers, a plurality of inflatable air pads mounted on said member, conduit means connected to each one of said pads, said conduit means including an inlet connectable to the source of pressurized fluid, a plurality of sonic flow restrictors disposed in said conduit means, each sonic flow restrictor being located between a different one of said pads and said inlet, and a plurality of second flow restrictors, each one of said second flow restrictors being connected between one of said chambers and one of said pads downstream of the associated sonic flow restrictor.
Claim 7
Dependent Claim
14 words
The device as set forth in claim 3 wherein said chambers have fixed volumes.
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |