US3746850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diver decompression apparatus
Assignee: Edgewell Personal Care Brands LLC
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Filing: 1971-09-09
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Granted: 1973-07-17
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Expires: 1991-09-09
Abstract
Abstract A diver decompression apparatus for indicating the safe ascent criterion for returning from the ocean depths to the surface, comprising a body tissue simulator, means for sampling exposure to inert gas at various body tissue depths and indication means to determine safe ascent criteria.
Inventors
- 👤 J Moore
- 👤 A Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:15
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
162 words
An apparatus for determining a safe ascent rate for a diver to prevent decompression sickness, comprising: a. a pressure transducer capable of producing an output voltage which is a linear function of water depth; b. a body tissue simulator capable of simulating the amount of inert gas distributed in the body tissue at various water depths, said simulator comprising a resistance-capacitance network connected in series with said pressure transducer whereby the capacitor included in each section of said network is charged by said output voltage from said pressure transducer; c. means for sampling the voltage across each section of said resistance-capacitance network of said simulator; d. means for summing the sample voltages across each section of said resistance-capacitance network, including a resistor and an amplifier; and e. at least one detector circuit connected in series with said summing means which is capable of producing an output signal proportional to the voltage across said resistor, indicating the safe ascent rate to the diver.
Claim 2
Independent Claim
162 words
An apparatus for determining a safe ascent rate for a diver to prevent decompression sickness, comprising: a. a pressure transducer capable of producing an output voltage which is a linear function of water depth; b. a body tissue simulator capable of simulating the amount of inert gas distributed in the body tissue at various water depths, said simulator comprising a resistance-capacitance network connected in series with said pressure transducer whereby the capacitor included in each section of said network is charged by said output voltage from said pressure transducer; c. means for sampling the voltage across each section of said resistance-capacitance network of said simulator; d. means for summing the sample voltages across each section of said resistance-capacitance network, including a resistor and an amplifier; and e. at least one detector circuit connected in series with said summing means which is capable of producing an output signal proportional to the voltage across said resistor, indicating the safe ascent rate to the diver.
Claim 3
Dependent Claim
19 words
The apparatus defined by claim 1 wherein said sampling means comprises a monostable multivibrator and a polarity detecting amplifier.
Claim 4
Dependent Claim
26 words
The apparatus as defined by claim 1 wherein said body tissue simulator comprises a 14 section resistance-capacitance network wherein each sectiOn has the identical time constant.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |