Patent US4458000A successfully refreshed from Google Patents.
US3605136A
Expired / Lapsed
US
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Powered litter rack
Assignee: United States Department of the Army
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Filing: 1969-10-27
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Granted: 1971-09-20
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Expires: 1989-10-27
Abstract
Abstract A POWERED LITTER RACK FOR QUICKLY LOADING WOUNDED COMBAT PERSONNEL IN A HELICOPTER WITH A MINIMUM OF EFFORT. A PAIR OF UPRIGHT AND SACED FRAMES ARE PROVIDED EACH WITH A PAIR OF POWERED, UPRIGHT, ENDLESS CHAINS TO LIFT LITTERS BEARING THE WOUNDED INTO STACKED ARRANGEMENT IN AN AIRCRAFT. ELECTRIC MOTORS DRIVE THE CHAINS WHICH HAVE CLAMPS TO ENGAGE THE LITTERS FOR LIFTING. A PAIR OF RAILS FIXED TO THE RACKS RECEIVE THE LEGS OF A LITTER IN POSITION FOR ENGAGEMENT WITH THE CLAMPS.
Inventors
- 👤 Jules A Vichness
- 👤 Richard E Lane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:20
CPC Classifications
A; A47; A47C; A47C17/00; A47C17/64; A47C17/80; A61; A61G; A61G3/00; A61G3/02; A61G3/0218; A61G3/029; A61G3/08; A61G3/0816; A61G3/0825; A61G3/0858; A61G2220/00; A61G2220/10
Claims Analysis
Total Claims: 0
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |