US3722875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable suspension unit
Assignee: United States Department of the Air Force
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Filing: 1971-04-29
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Granted: 1973-03-27
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Expires: 1991-04-29
Abstract
Abstract An adjustable suspension unit having an outer housing encompassing a pair of counteracting bellows which are surrounded by a pair of damping bellows, respectively. Separating one set of counteracting and damping bellows from the other set of counteracting and damping bellows, is a middle plate utilized for supporting the equipment to be suspended. By regulating the volume and pressure within the counteracting bellows, the load carrying capacity and spring stiffness of the unit can be easily adjusted. Adjustment of the damping bellows can also be performed if necessary.
Inventors
- 👤 H Hasse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:54
CPC Classifications
F; F16; F16F; F16F13/00; F16F13/002
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
An adjustable suspension unit comprising an outer housing, a first set of bellows mounted within said housing, a second set of bellows mounted in said housing juxtaposed said first set of bellows and a plate mounted within said housing in such a position as to separate said first set of bellows from said second set of bellows whereby regulating the pressure and volume of said first and second set of bellows adjusts the load carrying capacity and spring stiffness of said suspension unit.
Claim 2
Dependent Claim
83 words
An adjustable suspension unit comprising an outer housing, a first set of bellows mounted within said housing, a second set of bellows mounted in said housing juxtaposed said first set of bellows and a plate mounted within said housing in such a position as to separate said first set of bellows from said second set of bellows whereby regulating the pressure and volume of said first and second set of bellows adjusts the load carrying capacity and spring stiffness of said suspension unit.
Claim 3
Dependent Claim
55 words
An adjustable suspension unit as defined in claim 1 wherein said first and second set of bellows are each made up of a counteracting bellows surrounded by a damping bellows, and at least one adjustable orifice is located in said plate between said pair of damping bellows thereby regulating the damping of said suspension unit.
Claim 4
Dependent Claim
36 words
An adjustable suspension unit as defined in claim 2 further comprising a bladder mounted within at least one of said counteracting bellows whereby inflating or deflating said bladder adjusts the spring stiffness of said suspension unit.
Claim 5
Dependent Claim
20 words
An adjustable suspension unit as defined in claim 3 wherein said pair of damping bellows are filled in a liquid.
Claim 6
Dependent Claim
29 words
An adjustable suspension unit as defined in claim 4 further comprising at least one air reservoir operably connected to said counteracting bellows for increasing or decreasing the volume thereof.
Claim 7
Dependent Claim
47 words
An adjustable suspension unit as defined in claim 5 further comprising a control needle fixedly secured to said housing and reaching from one of said damping bellows to the other, said control needle further protruding through said orifice thereby producing a damping characteristic which is amplitude dependent.
Claim 8
Dependent Claim
27 words
An adjustable suspension unit as defined in claim 6 wherein said housing has an opening therein and said plate protrudes therethrough whereby equipment can be mounted thereon.
Claim 9
Dependent Claim
47 words
An adjustable suspension unit as defined in claim 2 further comprising a control needle fixedly secured to said housing and reaching from one of said damping bellows to the other, said control needle further protruding through said orifice thereby producing a damping characteristic which is amplitude dependent.
Claim 10
Dependent Claim
29 words
An adjustable suspension unit as defined in claim 8 further comprising at least one air reservoir operably connected to said counteracting bellows for increasing or decreasing the volume thereof.
Claim 11
Dependent Claim
36 words
An adjustable suspension unit as defined in claim 9 further comprising a bladder mounted within at least one of said counteracting bellows whereby inflating or deflating said bladder adjusts the spring stiffness of said suspension unit.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |