Patent US4336799A successfully refreshed from Google Patents.
US4336799A
Expired / Lapsed
US
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Apparatus for supplying oxygen to a user
Assignee: BANYASZATI AKNAMELYITO VALLALAT
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Filing: 1980-09-03
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Granted: 1982-06-29
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Expires: 2000-09-03
Abstract
Abstract An apparatus for supplying oxygen to a person at a mine site upon the depletion of atmospheric oxygen or the filling of the air with smoke or dust particles or poisonous fumes comprising a helmet having a visor shiftably mounted thereon for normally assuming an out-of-use position and for assuming an in-use position over the face of a user upon manipulation thereby. An oxygen-containing vessel is attached to a belt worn by the user, with a conduit connected at one end to the vessel and at the other end to the visor for forming a gas-guiding channel between the vessel and a space formed between the face of the user and the visor upon a shifting thereof into the in-use position. A gas-flow control on the vessel for enabling communication between the vessel and the conduit includes a narrow gas-conducting duct and a broad gas-conducting duct, the gas-flow control further including an initialization valve normally blocking the broad duct and an actuator operatively connectable to the valve for temporarily unblocking the broad duct upon a shifting of the visor into the in-use position, a tension member extending through the conduit along the length thereof from the visor to the gas-flow control for actuating same.
Inventors
- 👤 Istvan Almasi
- 👤 Ferenc Kassai
- 👤 Attila Erdelyi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:42
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
217 words
An apparatus for supplying oxygen to a user, said apparatus comprising: a helmet; a visor shiftably mounted on said helmet for normally assuming an out-of-use position and for assuming an in-use position over the face of said user upon manipulation thereby; an oxygen-containing vessel attachable to a belt worn by said user; conduit means connected at one end to said vessel and at another end to said visor for forming a gas-guiding channel between said vessel and a space formed between the face of said user and said visor upon a shifting thereof into said in-use position; gas-flow control means on said vessel for enabling communication between said vessel and said conduit means, said gas-flow control means including first means for conveying oxygen-containing gas from said vessel to said enclosed space at a relatively slow rate during a substantially steady-state operation of said apparatus and second means for conveying gas from said vessel to said enclosed space at a relatively high rate during a transient state involving an initial charging of said enclosed space upon a shifting of said visor into said in-use position; and force-transmitting means extending from said visor to said gas-flow control means for actuating same to connect said vessel to said conduit means upon a shifting of said visor into said in-use position.
Claim 2
Independent Claim
217 words
An apparatus for supplying oxygen to a user, said apparatus comprising: a helmet; a visor shiftably mounted on said helmet for normally assuming an out-of-use position and for assuming an in-use position over the face of said user upon manipulation thereby; an oxygen-containing vessel attachable to a belt worn by said user; conduit means connected at one end to said vessel and at another end to said visor for forming a gas-guiding channel between said vessel and a space formed between the face of said user and said visor upon a shifting thereof into said in-use position; gas-flow control means on said vessel for enabling communication between said vessel and said conduit means, said gas-flow control means including first means for conveying oxygen-containing gas from said vessel to said enclosed space at a relatively slow rate during a substantially steady-state operation of said apparatus and second means for conveying gas from said vessel to said enclosed space at a relatively high rate during a transient state involving an initial charging of said enclosed space upon a shifting of said visor into said in-use position; and force-transmitting means extending from said visor to said gas-flow control means for actuating same to connect said vessel to said conduit means upon a shifting of said visor into said in-use position.
Claim 3
Independent Claim
213 words
An apparatus for supplying oxygen to a user, said apparatus comprising: a helment; a visor shiftably mounted on said helment for normally assuming an out-of-use position and for assuming an in-use position over the face of said user upon manipulation thereby; an oxygen-containing vessel attachable to a belt worn by said user; conduit means connected at one end to said vessel and at another end to said visor for forming a gas-guiding channel between said vessel and a space formed between the face of said user and said visor upon a shifting thereof into said in-use position; a gas-flow control means on said vessel for enabling communication between said vessel and said conduit means; force-transmitting means extending from said visor to said gas-flow control means for actuating same to connect said vessel to said conduit means upon a shifting of said visor into said in-use position; closure means including a seal on said visor for engaging in a substantially air-tight fit the face of said user upon a shifting of said visor into said in-use position, whereby an enclosed space is formed at the face of said user; and pressure regulating means on said visor for controlling the pressure of gas admitted into said enclosed space from said vessel via said conduit means.
Claim 4
Independent Claim
213 words
An apparatus for supplying oxygen to a user, said apparatus comprising: a helment; a visor shiftably mounted on said helment for normally assuming an out-of-use position and for assuming an in-use position over the face of said user upon manipulation thereby; an oxygen-containing vessel attachable to a belt worn by said user; conduit means connected at one end to said vessel and at another end to said visor for forming a gas-guiding channel between said vessel and a space formed between the face of said user and said visor upon a shifting thereof into said in-use position; a gas-flow control means on said vessel for enabling communication between said vessel and said conduit means; force-transmitting means extending from said visor to said gas-flow control means for actuating same to connect said vessel to said conduit means upon a shifting of said visor into said in-use position; closure means including a seal on said visor for engaging in a substantially air-tight fit the face of said user upon a shifting of said visor into said in-use position, whereby an enclosed space is formed at the face of said user; and pressure regulating means on said visor for controlling the pressure of gas admitted into said enclosed space from said vessel via said conduit means.
Claim 5
Dependent Claim
76 words
The apparatus defined in claim 2 wherein said pressure-regulating means includes a first pressure-relief valve connected to said conduit means for admitting oxygen-containing gas into said enclosed space upon the exceeding of a predetermined limit by the pressure difference between gas in said conduit means and gas in said enclosed space, said pressure-regulating means further comprising a second pressure-relief valve disposed on said visor between the atmosphere and said enclosed space for venting excess gas therefrom.
Claim 6
Independent Claim
314 words
An apparatus for supplying oxygen to a user, said apparatus comprising: a helmet; a visor shiftably mounted on said helmet for normally assuming an out-of-use position and for assuming an in-use position over the face of said user upon manipulation thereby; an oxygen-containing vessel attachable to a belt worn by said user; conduit means connected at one end to said vessel and at another end to said visor for forming a gas-guiding channel between said vessel and a space formed between the face of said user and said visor upon a shifting thereof into said in-use position; gas-flow control means on said vessel for enabling communication between said vessel and said conduit means; force-transmitting means extending from said visor to said gas-flow control means for actuating same to connect said vessel to said conduit means upon a shifting of said visor into said in-use position; closure means including a seal on said visor for engaging in a substantially air-tight fit the face of said user upon a shifting of said visor into said in-use position, whereby an enclosed space is formed at the face of said user; pressure regulating means on said visor for controlling the pressure of gas admitted into said enclosed space from said vessel via said conduit means, said pressure-regulating means including a first pressure-relief valve connected to said conduit means for admitting oxygen-containing gas into said enclosed space upon the exceeding of a predetermined limit by the pressure difference between gas in said conduit means and gas in said enclosed space, and a second pressure-relief valve disposed on said visor between the atmosphere and said enclosed space for venting excess gas therefrom; and a sack linked to said visor for communicating with said enclosed space to receive and temporarily store gas therefrom, said sack being connected to a device for eliminating noxious components from the gases in said enclosed space.
Claim 7
Independent Claim
314 words
An apparatus for supplying oxygen to a user, said apparatus comprising: a helmet; a visor shiftably mounted on said helmet for normally assuming an out-of-use position and for assuming an in-use position over the face of said user upon manipulation thereby; an oxygen-containing vessel attachable to a belt worn by said user; conduit means connected at one end to said vessel and at another end to said visor for forming a gas-guiding channel between said vessel and a space formed between the face of said user and said visor upon a shifting thereof into said in-use position; gas-flow control means on said vessel for enabling communication between said vessel and said conduit means; force-transmitting means extending from said visor to said gas-flow control means for actuating same to connect said vessel to said conduit means upon a shifting of said visor into said in-use position; closure means including a seal on said visor for engaging in a substantially air-tight fit the face of said user upon a shifting of said visor into said in-use position, whereby an enclosed space is formed at the face of said user; pressure regulating means on said visor for controlling the pressure of gas admitted into said enclosed space from said vessel via said conduit means, said pressure-regulating means including a first pressure-relief valve connected to said conduit means for admitting oxygen-containing gas into said enclosed space upon the exceeding of a predetermined limit by the pressure difference between gas in said conduit means and gas in said enclosed space, and a second pressure-relief valve disposed on said visor between the atmosphere and said enclosed space for venting excess gas therefrom; and a sack linked to said visor for communicating with said enclosed space to receive and temporarily store gas therefrom, said sack being connected to a device for eliminating noxious components from the gases in said enclosed space.
Claim 8
Dependent Claim
51 words
The apparatus defined in claim 4, wherein said conduit means includes a flexible hose attached to said vessel via said gas-flow control means, further comprising mounting means on said helmet for securing said hose thereto, said conduit means further including a telescoping tube extending from said mounting means to said visor.
Claim 9
Dependent Claim
22 words
The apparatus defined in claim 5 wherein said force-transmitting means includes a tension member extending through said hose along the length thereof.
Claim 10
Dependent Claim
21 words
The apparatus defined in claim 6 wherein said force-transmitting means includes means for adjusting the effective length of said tension member.
Claim 11
Dependent Claim
36 words
The apparatus defined in claim 1, 2, 3, 4, 5, 6 or 7, further comprising a protective shell mounted on said helmet, said visor being inserted between said shell and said helment in said out-of-use position.
Claim 12
Dependent Claim
63 words
The apparatus defined in claim 1 wherein said first means includes a narrow gas-conducting duct and said second means includes a broad gas-conducting duct, said gas-flow control means further including an initialization valve normally blocking said broad duct and actuator means operatively connectable to said initialization valve for temporarily unblocking said broad duct upon a shifting of said visor into said in-use position.
Claim 13
Dependent Claim
48 words
The apparatus defined in claim 9 wherein said gas-flow control means includes a shaft connected to said tension member and said actuator means includes a pivotably mounted lever linked to said shaft for swinging into an engagement with said initialization valve upon a loading of said tension member.
Claim 14
Dependent Claim
95 words
The apparatus defined in claim 10 wherein said gas-flow control means includes a valve member rigid with said shaft and seated in a valve housing in an out-of-use state of said apparatus corresponding to said out-of-use position, said gas-flow control means further including a spring-loaded latch mounted in said housing, said shaft being biased by a spring in a direction tending to seat said valve member in said housing, said shaft being provided with means for forming a locked engagement with said latch in an in-use state of said apparatus corresponding to said in-use position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |