US3326311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material handling machine
Assignee: Doosan Bobcat North America Inc
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Filing: 1965-12-03
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Granted: 1967-06-20
•
Expires: 1985-12-03
Abstract
No abstract record available.
Inventors
- 👤 Richard R Jung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:39
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
137 words
A PNEUMATIC DOLLY COMPRISING AN UPRIGHT STANDARD, A CASTER WHEEL SUPPORTING SAID STANDARD AT EACH SIDE THEREOF, A GENERALLY L-SHAPED LOAD SUPPORT ASSEMBLY MOUNTED FORWARDLY OF SAID STANDARD, PIVOTABLE LINKAGE MEANS CONNECTING THE LOAD SUPPORT ASSEMBLY TO SAID STANDARD, THE HORIZONTAL LEG OF SAID LOAD SUPPORT ASSEMBLY INCLUDING AN UPPER LOAD PLATFORM CONNECTED TO THE VERTICAL LEG OF THE LOAD SUPPORT ASSEMBLY, A FLEXIBLE AIR PAD SECURED BENEATH SAID PLATFORM AND FORMING THEREWITH AN ANNULAR AIR PRESSURE CHAMBER AND FORMING WITH A DOLLY SUPPORTING SURFACE A PLENUM CHAMBER AND APERTURES IN SAID AIR PAD COMMUNICATING SAID AIR CHAMBER WITH SAID PLENUM CHAMBER, AND A SOURCE OF AIR PRESSURE SUPPLY CONNECTED TO SAID AIR CHAMBER FOR CAUSING AIR FLOW THROUGH SAID PLENUM CHAMBER TO THE ATMOSPHERE TO ELEVATE SLIGHTLY SAID L-SHAPED LOAD SUPPORT ASSEMBLY ON SAID LINKAGE MEANS
References Cited (Backward Citations)
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Cited
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Cited
US2973878A
Cited
US3260322A
Cited
US3202232A
Cited
US3237708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |