Patent US3821950A successfully refreshed from Google Patents.
US3821950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respirometer
Assignee: Individual
•
Filing: 1972-11-15
•
Granted: 1974-07-02
•
Expires: 1992-11-15
Abstract
Abstract Elongated, air tight, flexible bag for measuring respiratory volume is attached at one end to a roller having a passageway therethrough which communicates with the interior of the bag and with a means for receiving expiratory gas from a test subject, and which further includes an easily closable opening, requiring deliberate closure during use, to prevent suffocation of an incapacitated test subject. In its preferred form, the bag includes a relatively inflexible corrugated structure opposite that part of the bag in communication with the interior of the roller passageway to prevent excessive back pressure. Preferably, the calibration markings are devised so that measurement is taken by progressively collapsing the bag beginning at one end thereof while holding the bag against a flat surface and proceeding toward the opposite end of the bag until the internal pressure in the uncollapsed portion of the bag causes a distention of the bag away from the flat surface. This specific method of measuring respiratory volume is also within the scope of the present invention.
Inventors
- 👤 J Boehringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:17
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/08; A61B5/091; A61B5/093
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
82 words
A device for measuring respiratory volume comprising an elongated, air tight, flexible bag, one end of which is permanently sealed, the other end of which is attached to a roller having a passageway means therethrough, said passageway means communicating with the interior of said bag and including a means for receiving expiratory gas from a test subject, said passageway means further including a second means selectively defining a closable opening to the atmosphere, and constituting, when open, an inhalation and exhalation means.
Claim 2
Independent Claim
82 words
A device for measuring respiratory volume comprising an elongated, air tight, flexible bag, one end of which is permanently sealed, the other end of which is attached to a roller having a passageway means therethrough, said passageway means communicating with the interior of said bag and including a means for receiving expiratory gas from a test subject, said passageway means further including a second means selectively defining a closable opening to the atmosphere, and constituting, when open, an inhalation and exhalation means.
Claim 3
Dependent Claim
22 words
A device, as recited in claim 1, wherein said closable opening consists of a hole about 0.6 inches or less in diameter.
Claim 4
Dependent Claim
34 words
A bag and roller, as recited in claim 1, wherein said roller is a cylinder, one end of which is open to the atmosphere through an opening about 0.6 inches or less in diameter.
Claim 5
Dependent Claim
40 words
A device, as recited in claim 1, wherein said passageway communicates with the interior of said bag through an opening in one side of said bag, the side of said bag opposite said opening including a relatively inflexible corrugated structure.
Claim 6
Dependent Claim
17 words
A device, as recited in claim 1, wherein said bag includes calibration markings along the length thereof.
Claim 7
Dependent Claim
110 words
A device, as recited in claim 5, wherein said flexible bag is also relatively non-yieldable and each of said calibration markings indicate the volume of gas entrapped in said bag in a first portion thereof between said marking and said sealed end of said bag when the remaining portion of said bag is collapsed and the pressure within said first portion of said bag is sufficiently great to cause inflation thereof and a preselected amount of distention of said inflated portion of said bag away from a flat surface when said bag is held at said calibration marking against said flat surface and across the width of said elOngated bag.
Claim 8
Dependent Claim
21 words
A device, as recited in claim 6, wherein said closable opening comprises a hole about 0.6 inches or less in diameter.
Claim 9
Dependent Claim
40 words
A device, as recited in claim 6, wherein said passageway communicates with the interior of said bag through an opening in one side of said bag, the side of said bag opposite said opening including a relatively inflexible corrugated structure.
Claim 10
Dependent Claim
21 words
A device, as recited in claim 8, wherein said closable opening comprises a hole about 0.6 inches or less in diameter.
Claim 11
Independent Claim
101 words
A device for mesuring respiratory volume consisting of an elongated, air tight, flexible bag, one end of which is permanently sealed, the other end of which is attached to a roller having a passageway therethrough, said passageway communicating with the interior of said bag and with a means for receiving expiratory gas from a test subject, said passageway further including a first closable opening to the atmosphere, said passageway communicating with the interior of said bag through a second opening in one side of said bag, the side of said bag opposite said second opening including a relatively inflexible corrugated structure.
Claim 12
Independent Claim
101 words
A device for mesuring respiratory volume consisting of an elongated, air tight, flexible bag, one end of which is permanently sealed, the other end of which is attached to a roller having a passageway therethrough, said passageway communicating with the interior of said bag and with a means for receiving expiratory gas from a test subject, said passageway further including a first closable opening to the atmosphere, said passageway communicating with the interior of said bag through a second opening in one side of said bag, the side of said bag opposite said second opening including a relatively inflexible corrugated structure.
Claim 13
Dependent Claim
22 words
A device, as recited in claim 10, wherein said closable opening consists of a hole about 0.6 inches or less in diameter.
Claim 14
Independent Claim
216 words
A device for measuring respiratory volume consisting of an elongated, air tight, flexible bag, one end of which is permanently sealed, the other end of which is attached to a roller having a passageway therethrough, said passageway communicating with the interior of said bag and with a means for receiving expiratory gas from a test subject, said passageway further including a closable opening to the atmosphere, said bag including calibration markings along the length thereof, and wherein said flexible bag is also relatively non-yielding and each of said calibration markings indicate the volume of gas entrapped in said bag in a first portion thereof between said marking and said sealed end of said bag when the remaining portion of said bag is collapsed and the pressure within said first portion of said bag is sufficiently great to cause inflation thereof and a preselected amount of distention of said inflated portion of said bag away from a flat surface when said bag is held at said calibration marking against said flat surface and across the width of said elongated bag, and further wherein said passageway communicates with the interior of said bag through a second opening in one side of said bag, the side of said bag opposite said second opening including a relatively inflexible corrugated structure.
Claim 15
Independent Claim
216 words
A device for measuring respiratory volume consisting of an elongated, air tight, flexible bag, one end of which is permanently sealed, the other end of which is attached to a roller having a passageway therethrough, said passageway communicating with the interior of said bag and with a means for receiving expiratory gas from a test subject, said passageway further including a closable opening to the atmosphere, said bag including calibration markings along the length thereof, and wherein said flexible bag is also relatively non-yielding and each of said calibration markings indicate the volume of gas entrapped in said bag in a first portion thereof between said marking and said sealed end of said bag when the remaining portion of said bag is collapsed and the pressure within said first portion of said bag is sufficiently great to cause inflation thereof and a preselected amount of distention of said inflated portion of said bag away from a flat surface when said bag is held at said calibration marking against said flat surface and across the width of said elongated bag, and further wherein said passageway communicates with the interior of said bag through a second opening in one side of said bag, the side of said bag opposite said second opening including a relatively inflexible corrugated structure.
Claim 16
Dependent Claim
21 words
A device, as recited in claim 12, wherein said closable opening comprises a hole about 0.6 inches or less in diameter.
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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |