Patents
US 10274973 B2: Semi-closed circuit underwater breathing apparatus ratio regulator
- Granted
- 2019-04-30
- Filed
- 2017-04-13 application 15486736
- Type
- Utility · 5 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
An apparatus for adjusting the partial pressure of gaseous mixtures comprises a housing and piston. The housing defines a chamber coupled to an oxygen metering orifice, diluent metering orifice, vent port and gas outlet. The oxygen metering orifice provides oxygen to the chamber and the diluent metering orifice provides diluent gas to the chamber. The piston is movably positioned in the chamber and includes first and second sealing devices. The chamber is sectioned into a mixing chamber, a diluent chamber and a reference chamber located between the mixing chamber and diluent chamber. The diluent chamber receives a diluent gas referenced at ambient pressure and the reference chamber is charged with a gas having a reference pressure. The piston changes positions within the chamber depending on a force balance created by a pressure differential between the reference pressure and ambient pressure.
Source: PVGPATDIS, file of 2026-04-10 (ipg190430.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Carleton Life Support Systems Inc. 30 patents | US company or organization | Davenport, IA | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Gary Byrd | Donahue, IA | 2 | PVGPATDIS, file of 2026-04-10 | |
| Chris Fellner | Blue Grass, IA | 2 | PVGPATDIS, file of 2026-04-10 | |
| Misty Dowdal | Colona, IL | 1 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G05D | Systems for controlling or regulating non-electric variables | G05D11/035 | PVGPATDIS, file of 2026-04-10 |
| B63C | Launching, hauling-out, or dry-docking of vessels; life-saving in water; equipment for dwelling or working under water; means for salvaging or searching for underwater objects | B63C11/2209 | PVGPATDIS, file of 2026-04-10 |
| Y10T | Technical subjects covered by former us classification | Y10T137/2564 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2021-06-02 | Release of security interest Partial release of security interest in intellectual property | WILMINGTON TRUST, NATIONAL ASSOCIATION, AS SECURITY AGENT signed 2021-06-01 | COBHAM MISSION SYSTEMS DAVENPORT AAR INC. DAVENPORT, IA COBHAM MISSION SYSTEMS DAVENPORT LSS INC. DAVENPORT, IA COBHAM MISSION SYSTEMS ORCHARD PARK INC. DAVENPORT, IA | 56461/689 | ECORSEXC, file of 2026-09-25 |
| 2021-06-02 | Release of security interest Partial release of security interest in intellectual property | WILMINGTON TRUST, NATIONAL ASSOCIATION, AS SECURITY AGENT signed 2021-06-01 | COBHAM MISSION SYSTEMS DAVENPORT AAR INC. DAVENPORT, IA COBHAM MISSION SYSTEMS DAVENPORT LSS INC. DAVENPORT, IA COBHAM MISSION SYSTEMS ORCHARD PARK INC. DAVENPORT, IA | 56461/677 | ECORSEXC, file of 2026-09-25 |
| 2020-06-15 | Security interest Security interest Second lien us intellectual property security agreement | CHELTON AVIONICS, INC. signed 2020-06-12 COBHAM ADVANCED ELECTRONIC SOLUTIONS INC. signed 2020-06-12 COBHAM MISSION SYSTEMS DAVENPORT AAR INC. signed 2020-06-12 COBHAM MISSION SYSTEMS DAVENPORT LSS INC. signed 2020-06-12 COBHAM MISSION SYSTEMS ORCHARD PARK INC. signed 2020-06-12 | WILMINGTON TRUST, NATIONAL ASSOCIATION MINNEAPOLIS, MN | 52945/653 | ECORSEXC, file of 2026-09-25 |
| 2020-06-15 | Security interest Security interest First lien us intellectual property security agreement | CHELTON AVIONICS, INC. signed 2020-06-12 COBHAM ADVANCED ELECTRONIC SOLUTIONS INC. signed 2020-06-12 COBHAM MISSION SYSTEMS DAVENPORT AAR INC. signed 2020-06-12 COBHAM MISSION SYSTEMS DAVENPORT LSS INC. signed 2020-06-12 COBHAM MISSION SYSTEMS ORCHARD PARK INC. signed 2020-06-12 | WILMINGTON TRUST, NATIONAL ASSOCIATION MINNEAPOLIS, MN | 52945/547 | ECORSEXC, file of 2026-09-25 |
| 2019-08-22 | Name change Change of name | CARLETON LIFE SUPPORT SYSTEMS INC. signed 2019-04-02 | COBHAM MISSION SYSTEMS DAVENPORT LSS INC. DAVENPORT, IA | 50139/423 | ECORSEXC, file of 2026-09-25 |
| 2017-06-20 | Assignment Assignment of assignor's interest | BYRD, GARY signed 2017-05-26 DOWDAL, MISTY signed 2017-05-26 FELLNER, CHRIS signed 2017-05-26 | CARLETON LIFE SUPPORT SYSTEMS INC. DAVENPORT, IA | 42754/554 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.