US3589190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respiration testing apparatus
Assignee: Individual
•
Filing: 1968-06-21
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Granted: 1971-06-29
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Expires: 1988-06-21
Abstract
Abstract A respiration testing apparatus suitable for use in pulmonary function analysis. The apparatus includes an outer casing and a horizontal bellows which has a fixed end plate secured to the casing and a movable end plate supported by an elongated, horizontally extending rod which passes through the center of the movable end plate and is secured thereto. A breathing tube extends through the casing and the stationary end plate into the bellows. The support rod is slidably supported for horizontal movement by a pair of rollers, one of which is rotatably mounted on the casing adjacent one end of the rod and the other end of the rod. The first end of the rod carries a stylus which describes a recording chart to record movement of the rod and the bellows as air is drawn into and removed from the bellows through the breathing tube.
Inventors
- 👤 William C Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:47
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/08; A61B5/091; A61B5/093; A61B5/0935
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
136 words
In a respiration testing device, an outer casing, a horizontal bellows in said casing, said bellows having a stationary end plate secured to said casing and a movable end plate, a breathing tube extending through said casing and said stationary end plate, an elongated horizontally extending support rod passing through the approximate center of said movable end plate and secured thereto for movement therewith, first support means fixed to said stationary end plate at approximately the center thereof for slidably supporting one end of said rod, and second support means attached to said casing on substantially the same horizontal axis as the first support means for slidably supporting the other end of said rod whereby said bellows may expand and contract evenly as air is drawn into and removed from the bellows through the breathing tube.
Claim 2
Dependent Claim
136 words
In a respiration testing device, an outer casing, a horizontal bellows in said casing, said bellows having a stationary end plate secured to said casing and a movable end plate, a breathing tube extending through said casing and said stationary end plate, an elongated horizontally extending support rod passing through the approximate center of said movable end plate and secured thereto for movement therewith, first support means fixed to said stationary end plate at approximately the center thereof for slidably supporting one end of said rod, and second support means attached to said casing on substantially the same horizontal axis as the first support means for slidably supporting the other end of said rod whereby said bellows may expand and contract evenly as air is drawn into and removed from the bellows through the breathing tube.
Claim 3
Dependent Claim
44 words
The structure of claim 1 in which said breathing tube extends through the approximate center of said stationary end plate, said first support means including a roller rotatably secured to the breathing tube, said rod passing over the roller and into the breathing tube.
Claim 4
Dependent Claim
37 words
The structure of claim 1 including recording means carried by said casing and stylus means carried by said other end of said support rod, said stylus means scribing said recording means as said bellows contracts and expands.
Claim 5
Dependent Claim
202 words
In a respiration testing device, an outer casing, a horizontal bellows in said casing, said bellows being generally rectangular in vertical cross section and having a stationary end plate secured to said casing and a generally rectangular movable end plate, a breathing tube extending through said casing and said stationary end plate, said breathing tube extending generally through the center of the stationary end plate, an elongated generally horizontally extending support rod passing through the center of said movable end plate and secured thereto, a first stroller rotatably mounted on said casing and supporting said support rod adjacent one end thereof, a second roller rotatably secured to said breathing tube on substantially the same horizontal axis as the first roller and supporting said support rod adjacent the other end thereof, said rod passing over the second roller and into the breathing tube, recording means operatively connected to said one rod end for recording the movement thereof as air is drawn into and removed from said bellows, the other end of the rod moving axially within the breathing tube as the bellows expands and contracts and the movable end plate being maintained in a generally perpendicular plane as the bellows expands and contracts.
Claim 6
Dependent Claim
202 words
In a respiration testing device, an outer casing, a horizontal bellows in said casing, said bellows being generally rectangular in vertical cross section and having a stationary end plate secured to said casing and a generally rectangular movable end plate, a breathing tube extending through said casing and said stationary end plate, said breathing tube extending generally through the center of the stationary end plate, an elongated generally horizontally extending support rod passing through the center of said movable end plate and secured thereto, a first stroller rotatably mounted on said casing and supporting said support rod adjacent one end thereof, a second roller rotatably secured to said breathing tube on substantially the same horizontal axis as the first roller and supporting said support rod adjacent the other end thereof, said rod passing over the second roller and into the breathing tube, recording means operatively connected to said one rod end for recording the movement thereof as air is drawn into and removed from said bellows, the other end of the rod moving axially within the breathing tube as the bellows expands and contracts and the movable end plate being maintained in a generally perpendicular plane as the bellows expands and contracts.
Claim 7
Dependent Claim
26 words
The structure of claim 4 wherein said recording means includes a stylus carried by said one rod end and a recording chart mounted on said casing.
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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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |