Patent US3565068A successfully refreshed from Google Patents.
US3565068A
Expired / Lapsed
US
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Breathing apparatus
Assignee: Automatic Sprinkler Corp
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Filing: 1969-02-07
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Granted: 1971-02-23
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Expires: 1989-02-07
Abstract
Abstract A self-contained emergency breathing apparatus comprising a chemical oxygen generator having an expandable casing, a delivery tube, a filter in the tube, a carbon dioxide absorber having a mouthbit, and a hood for covering the head of the user and enclosing the carbon dioxide absorber to form a closed circuit rebreathing system. The components of the system are encased in a compact package form in a container which can be carried by the user and readily opened in an emergency situation.
Inventors
- 👤 Allan Morris Bickford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:32
CPC Classifications
A; A62; A62B; A62B17/00; A62B17/08; A62B7/00; A62B7/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
34 words
A breathing apparatus according to claim 1 wherein said source of oxygen comprises an oxygen generator having a canister and an oxygen evolving body, said canister having a chamber connected to said delivery tube.
Claim 2
Dependent Claim
41 words
A breathing apparatus according to claim 2 together with a casing formed of a springy material connected to said canister wrapped tightly thereabout when enclosed in said container, said casing being adapted to expand radially outwardly when said container is opened.
Claim 3
Dependent Claim
29 words
A breathing apparatus according to claim 1 wherein said container is formed of two sections, one of said sections mounting said oxygen generator, and means securing said sections together.
Claim 4
Dependent Claim
48 words
A breathing apparatus according to claim 4 wherein said securing means includes a wire encircling said sections, staples overlying said wire and holding said sections together, and a strip of material adhesively secured to said staples and said wire and having a pull tab at one end thereof.
Claim 5
Dependent Claim
36 words
A breathing apparatus according to claim 1 wherein said assembly comprises a canister, a chamber in said canister communicating with said tube, and carbon dioxide absorbent material in said canister on opposite sides of said chamber.
Claim 6
Dependent Claim
41 words
A breathing apparatus according to claim 6 together with at least one port in said chamber, and valve means for opening said port upon inhalation and closing said port upon exhalation to direct exhaled air into the carbon dioxide absorbent material.
Claim 7
Dependent Claim
32 words
A breathing apparatus according to claim 7 together with spacer means provided at the opposite ends of said canister for preventing collapse of said hood against said opposite ends of said canister.
Claim 8
Dependent Claim
20 words
A breathing apparatus according to claim 1 together with an obstructor adapted to close the nose passages of the wearer.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |