US3759101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined depth gauge and pneumatic analogue decompression instrument
Assignee: General Electric Co
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Filing: 1971-09-16
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Granted: 1973-09-18
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Expires: 1991-09-16
Abstract
Abstract In this computer for calculating and indicating safe minimumduration decompression schedules, a porous body serves the double purpose of supporting the gas diffusion membrane and providing a substantially constant gas chamber. Additionally, the immersible housing of the instrument has an integrally-formed depth gauge in the form of an arcuate rib portion having a tapered axial bore open only at its larger end. A single instrument dial serves both the computer gauge and the depth gauge in this coordinated assembly.
Inventors
- 👤 M Borom
- 👤 L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:30
CPC Classifications
G; G01; G01L; G01L11/00; B; B63; B63C; B63C11/00; B63C11/02; B63C11/32; G01F; G01F23/00; G01F23/14; G01F23/16
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
96 words
A decompression instrument which comprises, a. ambient pressure-sensing means including an ambient-pressure gas chamber; b. computing means for measuring continuously uptake and release of gas by human tissues under fluctuating hyperbaric ambient pressures including 1. a porous body providing a substantially constant volume gas chamber, 2. a gas-diffusion membrane supported by the porous body and disposed between and separating the ambient-pressure gas chamber and the constant volume gas chamber; and, c. indicator means including a gauge operatively associated with the computing means for indicating the appropriate decompression schedule in terms of hyperbaric pressures and time intervals.
Claim 2
Dependent Claim
96 words
A decompression instrument which comprises, a. ambient pressure-sensing means including an ambient-pressure gas chamber; b. computing means for measuring continuously uptake and release of gas by human tissues under fluctuating hyperbaric ambient pressures including 1. a porous body providing a substantially constant volume gas chamber, 2. a gas-diffusion membrane supported by the porous body and disposed between and separating the ambient-pressure gas chamber and the constant volume gas chamber; and, c. indicator means including a gauge operatively associated with the computing means for indicating the appropriate decompression schedule in terms of hyperbaric pressures and time intervals.
Claim 3
Dependent Claim
50 words
a gas-diffusion membrane supported by the porous body and disposed between and separating the ambient-pressure gas chamber and the constant volume gas chamber; and, c. indicator means including a gauge operatively associated with the computing means for indicating the appropriate decompression schedule in terms of hyperbaric pressures and time intervals.
Claim 4
Dependent Claim
50 words
a gas-diffusion membrane supported by the porous body and disposed between and separating the ambient-pressure gas chamber and the constant volume gas chamber; and, c. indicator means including a gauge operatively associated with the computing means for indicating the appropriate decompression schedule in terms of hyperbaric pressures and time intervals.
Claim 5
Dependent Claim
28 words
The instrument of claim 1 including a second porous body disposed on the ambient-pressure gas chamber side of the gas-duffusion membrane and providing support for said gas-diffusion membrane.
Claim 6
Dependent Claim
39 words
a guage operatively associated with the computing means having an indicator for registry with the dial to show the appropriate decompression schedule of stop depths and times and the inert gas debt in body tissues influencing repetitive dives, and
Claim 7
Dependent Claim
39 words
a guage operatively associated with the computing means having an indicator for registry with the dial to show the appropriate decompression schedule of stop depths and times and the inert gas debt in body tissues influencing repetitive dives, and
Claim 8
Dependent Claim
11 words
a capillary tube depth gauge coordinated with the dial for read-out.
Claim 9
Dependent Claim
11 words
a capillary tube depth gauge coordinated with the dial for read-out.
Claim 10
Dependent Claim
14 words
The instrument of claim 1 in which the porous body is of ceramic material.
Claim 11
Dependent Claim
14 words
The instrument of claim 2 in which both porous bodies are of ceramic material.
Claim 12
Dependent Claim
38 words
In a decompression instrument, in combination, a. ambient pressure-sensing means including an ambient-pressure gas chamber; b. computing means for measuring continuously uptake and release of gas by human tissues under fluctuating hyperbaric ambient pressures; c. indicator means including
Claim 13
Dependent Claim
38 words
In a decompression instrument, in combination, a. ambient pressure-sensing means including an ambient-pressure gas chamber; b. computing means for measuring continuously uptake and release of gas by human tissues under fluctuating hyperbaric ambient pressures; c. indicator means including
Claim 14
Dependent Claim
42 words
The instrument of claim 5 including a housing having a transparent portion and a rib portion formed in the housing and containing the capillary tube depth gauge with its open end opposite the zero point of the linear scale of water depth.
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |