Patent US4586136A successfully refreshed from Google Patents.
US4586136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital computer for determining scuba diving parameters for a particular diver
Assignee: Ho Underwater Acquisition LLC
•
Filing: 1983-10-31
•
Granted: 1986-04-29
•
Expires: 2003-10-31
Abstract
Abstract A device incorporates pressure transducers to measure the ambient water pressure and the pressure of the air in the tank and uses a microprocessor to combine those measurements with a time measurement. The microprocessor provides a digital readout of the tank pressure, the water depth, and the amount of air remaining in the tank calibrated in minutes of air remaining for the particular diver using the tank under the particular circumstances.
Inventors
- 👤 John E. Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:59
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
149 words
A device for use by a scuba diver comprising: means for measuring the pressure of the breathing gas within the diver's tank; means for measuring the ambient pressure; means for measuring time; means for utilizing the measurement of ambient pressure to determine the depth of a diver; means for determining the change in pressure of the breathing gas within the diver's tank; means for determining the length of a breathing period for a diver using the diver's tank; means for utilizing the ambient pressure, the length of a breathing period of a diver, and the change of pressure of the breathing gas to determine a breathing gas consumption factor for a particular diver; and means for utilizing the pressure of the breathing gas in the diver's tank, the breathing gas consumption factor, and the depth to determine the breathing time remaining to a particular diver at the particular depth.
Claim 2
Independent Claim
149 words
A device for use by a scuba diver comprising: means for measuring the pressure of the breathing gas within the diver's tank; means for measuring the ambient pressure; means for measuring time; means for utilizing the measurement of ambient pressure to determine the depth of a diver; means for determining the change in pressure of the breathing gas within the diver's tank; means for determining the length of a breathing period for a diver using the diver's tank; means for utilizing the ambient pressure, the length of a breathing period of a diver, and the change of pressure of the breathing gas to determine a breathing gas consumption factor for a particular diver; and means for utilizing the pressure of the breathing gas in the diver's tank, the breathing gas consumption factor, and the depth to determine the breathing time remaining to a particular diver at the particular depth.
Claim 3
Dependent Claim
64 words
A device as claimed in claim 1 in which the means for utilizing the pressure of the breathing gas in the diver's tank, the breathing gas consumption factor, and the depth to determine the breathing time remaining to a particular diver at the particular depth further includes means for adding a time to allow the safe assent by a diver at the particular depth.
Claim 4
Dependent Claim
25 words
A device as claimed in claim 1 further including means for displaying to a diver the present depth and the time remaining at the depth.
References Cited (Backward Citations)
US3681585A
Cited
US3992948A
Cited
US4005282A
Cited
US4054783A
Cited
US4107995A
Cited
US4109140A
Cited
US4192001A
Cited
US4307449A
Cited
US4188825A
Cited
US4336591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |