US3780723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure control system for g-suit
Assignee: United States Department of the Air Force
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Filing: 1972-07-18
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Granted: 1973-12-25
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Expires: 1992-07-18
Abstract
Abstract A control system for a G-suit having an acceleration signal and a time rate of change of the acceleration signal supplied to a summing circuit with the output of the summing circuit being supplied to a comparator through a function generator circuit. The function generator output is compared with a reference level in the comparator circuit with the output of the comparator being used to energize a relay that controls a solenoid between the air supply and the G-suit. The function generator programs pressure to the G-suit according to a particular function of the output signal of the summing circuit. A pressure signal from the pressure suit and rate of change in suit pressure signal are summed in a second summing circuit with the output of the second summing circuit being used as a third input to the comparator circuit.
Inventors
- 👤 Patten R Van
- 👤 D Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:51
CPC Classifications
B; B64; B64D; B64D10/00; Y; Y10; Y10T; Y10T137/00; Y10T137/0753
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
232 words
A pressure control system for pressure suit comprising; a pressure suit, means for providing a supply of air under pressure to said pressure suit; means for controlling the flow of air from the air supply to the pressure suit; said controlling means including a solenoid valve connected between the air supply and the pressure suit; a first summing circuit; means for supplying an acceleration responsive signal to a first input of said summing circuit; means for supplying a signal proportional to the time rate of change of the acceleration responsive signal to a second input of said first summing circuit; a comparator circuit; means for applying a signal, proportional to a certain predetermined function of the output of said first summing circuit, to a first input of the comparator circuit; means for supplying a reference level signal to a second input of said comparator circuit; a second summing circuit; means for supplying a signal proportional to pressure in said pressure suit to a first input to said second summing circuit; means for supplying a signal proportional to the time rate of change of pressure in the pressure suit to a second input of said second summing circuit; means for supplying the output of said second summing circuit to a third input of said comparator circuit; means reSponsive to the output of said comparator circuit for controlling the operation of said solenoid valve.
Claim 2
Dependent Claim
232 words
A pressure control system for pressure suit comprising; a pressure suit, means for providing a supply of air under pressure to said pressure suit; means for controlling the flow of air from the air supply to the pressure suit; said controlling means including a solenoid valve connected between the air supply and the pressure suit; a first summing circuit; means for supplying an acceleration responsive signal to a first input of said summing circuit; means for supplying a signal proportional to the time rate of change of the acceleration responsive signal to a second input of said first summing circuit; a comparator circuit; means for applying a signal, proportional to a certain predetermined function of the output of said first summing circuit, to a first input of the comparator circuit; means for supplying a reference level signal to a second input of said comparator circuit; a second summing circuit; means for supplying a signal proportional to pressure in said pressure suit to a first input to said second summing circuit; means for supplying a signal proportional to the time rate of change of pressure in the pressure suit to a second input of said second summing circuit; means for supplying the output of said second summing circuit to a third input of said comparator circuit; means reSponsive to the output of said comparator circuit for controlling the operation of said solenoid valve.
Claim 3
Dependent Claim
48 words
The device as recited in claim 1 wherein said function generator includes means for changing the rate of increase of suit pressure with an increase in the level of the output signal from the first summing circuit at predetermined voltage levels of the first summing circuit output signal.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |