US3577988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual canister recirculator
Assignee: AGONIC ENGINEERING Inc
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Filing: 1969-02-03
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Granted: 1971-05-11
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Expires: 1989-02-03
Abstract
Abstract The gas mixture breathed by a diver is circulated through a carbon dioxide removing chemical to eliminate the build up of carbon dioxide in the life support atmosphere. The chemical is contained in two separate tanks or canisters carried by the diver, and a gas propulsion mechanism is disposed between the two canisters. This results in sucking atmosphere through one canister and pushing it through the other, which reduces the channelling of gas in the carbon dioxide absorber chemical. Also it isolates the sound of the gas moving mechanism so that very little noise reaches the diver''s helmet, making it easier to use the diver''s microphone and earphones. The carbon dioxide absorber is prepackaged in removable cartridges to improve the quality of the packing of the absorbing chemical and to make removal and replacement of the chemical quicker and easier.
Inventors
- 👤 Richard F Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:29
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/22; B63C11/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
In a diving system including a diver''s enclosure having a pair of spaced recirculating openings, the combination with said enclosure of a recirculator for the removal of undesired constituents in the breathing atmosphere inside the enclosure comprising: a. a pair of canisters for the retention of absorbing material for a selected gas; b. an inlet on one canister connected to one enclosure opening; c. an outlet on the other canister connected to the other enclosure opening; d. a rigid connection between the canisters to place them in series; e. and pump means disposed in the connection for moving gas in one direction, whereby the atmosphere inside the enclosure may be drawn through one canister, and the drawn gas blown through the other canister to thereby remove unwanted gas constituents.
Claim 2
Dependent Claim
129 words
In a diving system including a diver''s enclosure having a pair of spaced recirculating openings, the combination with said enclosure of a recirculator for the removal of undesired constituents in the breathing atmosphere inside the enclosure comprising: a. a pair of canisters for the retention of absorbing material for a selected gas; b. an inlet on one canister connected to one enclosure opening; c. an outlet on the other canister connected to the other enclosure opening; d. a rigid connection between the canisters to place them in series; e. and pump means disposed in the connection for moving gas in one direction, whereby the atmosphere inside the enclosure may be drawn through one canister, and the drawn gas blown through the other canister to thereby remove unwanted gas constituents.
Claim 3
Dependent Claim
16 words
The combination of claim 1 wherein the pump means for moving the gas is an aspirator.
Claim 4
Dependent Claim
34 words
The device of claim 1 wherein the canisters hold a removable cartridge of gas absorbing material and the cartridges have an airtight fit in the canisters, and the sidewalls are formed of insulating material.
Claim 5
Dependent Claim
183 words
The combination of: a. a diver''s helmet having two recirculating openings, a direct line inlet, and a valve to control direct line flow; b. a body pack comprising a pair of canisters each having an opening, a connection placing them in series with respect to the canister openings, an aspirator in the connection to move gas in one direction through the canisters; and a valve assembly mechanically connected to the canisters having an inlet for fresh gas, a branch having free flow for the helmet and a branch having controlled flow to the body pack aspirator; c. conduits connected one to each helmet recirculator opening and to the respective canister openings to complete a recirculation circuit, and one connected to the valve free flow branch to the helmet direct line inlet; d. and a mechanically strong connection from the pack to the helmet whereby the body pack may be mechanically lifted by the strong connection so that the helmet may at all times remain connected to the pack for quick removal of the helmet or replacement of the helmet on the diver''s head.
Claim 6
Dependent Claim
183 words
The combination of: a. a diver''s helmet having two recirculating openings, a direct line inlet, and a valve to control direct line flow; b. a body pack comprising a pair of canisters each having an opening, a connection placing them in series with respect to the canister openings, an aspirator in the connection to move gas in one direction through the canisters; and a valve assembly mechanically connected to the canisters having an inlet for fresh gas, a branch having free flow for the helmet and a branch having controlled flow to the body pack aspirator; c. conduits connected one to each helmet recirculator opening and to the respective canister openings to complete a recirculation circuit, and one connected to the valve free flow branch to the helmet direct line inlet; d. and a mechanically strong connection from the pack to the helmet whereby the body pack may be mechanically lifted by the strong connection so that the helmet may at all times remain connected to the pack for quick removal of the helmet or replacement of the helmet on the diver''s head.
Claim 7
Dependent Claim
22 words
The combination of claim 4 wherein the mechanically strong connection is the conduit connecting the free flow valve branch to the helmet.
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |