US3642250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bomblift trailer lifting mechanism
Assignee: United States Department of the Air Force
•
Filing: 1969-12-16
•
Granted: 1972-02-15
•
Expires: 1989-12-16
Abstract
Abstract A four-wheel bomblift trailer chassis having a platform which is elevated by a scissors-type toggle linkage actuated by hydraulic piston-cylinder couples pivotally mounted on the linkage. Gear sectors and parallel tie rods are provided to constrain the toggles and stabilize the load platform to prevent lateral tilting as it is raised and lowered.
Inventors
- 👤 John H Klopp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:11
CPC Classifications
B; B66; B66F; B66F7/00; B66F7/06; B66F7/0633; B66F7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
In a bomblift trailer lifting mechanism, the improvement comprising a cradle for holding a store, an upper arm assembly pivotally attached to each end of said cradle, a lower arm assembly having one end pivotally attached to said upper arm assembly, the other end of said lower arm assembly being pivotally attached to one longitudinal frame member of the bomblift trailer, a hydraulic cylinder positioned between the lower end of said lower arm assembly and said upper arm assembly for raising and lowering said cradle by causing said upper and lower arm assemblies to rotate about their respective pivotal connections, the extension of the piston rod from said hydraulic cylinder causing said cradle to lift upward, and stabilizing means for maintaining said cradle in substantially horizontal position during the raising and lowering operation, said stabilizing means including a pair of tie rods positioned between the lower ends of said lower arm assembly and spur gear means operatively positioned at the lower end of oNe of said lower arm assemblies, thereby causing the lower arm assemblies to rotate in opposite directions and through equal angles during the lift cycle.
Claim 2
Dependent Claim
188 words
In a bomblift trailer lifting mechanism, the improvement comprising a cradle for holding a store, an upper arm assembly pivotally attached to each end of said cradle, a lower arm assembly having one end pivotally attached to said upper arm assembly, the other end of said lower arm assembly being pivotally attached to one longitudinal frame member of the bomblift trailer, a hydraulic cylinder positioned between the lower end of said lower arm assembly and said upper arm assembly for raising and lowering said cradle by causing said upper and lower arm assemblies to rotate about their respective pivotal connections, the extension of the piston rod from said hydraulic cylinder causing said cradle to lift upward, and stabilizing means for maintaining said cradle in substantially horizontal position during the raising and lowering operation, said stabilizing means including a pair of tie rods positioned between the lower ends of said lower arm assembly and spur gear means operatively positioned at the lower end of oNe of said lower arm assemblies, thereby causing the lower arm assemblies to rotate in opposite directions and through equal angles during the lift cycle.
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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |