US3848585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peak flow indicator for fluids
Assignee: MEEDA SCIENT INSTRUMENTATION L
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Filing: 1973-04-05
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Granted: 1974-11-19
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Expires: 1993-04-05
Abstract
Abstract A peak flow and/or velocity indicator for testing fluids comprising a body having a cylindrical bore one end of which constitutes the inlet, the other a cylinder in which a piston is slideable. At least one passage leads off from said bore making an acute angle with said cylinder. The outlet of said passage is controlled. An indicator means is lodged in said cylinder is adapted to be moved by said piston. Further means are provided to return said piston and said indicator means to starting position. When fluid flows through said inlet into said body, part of its volume leaves by way of said passage, while part pushes the piston forward in the cylinder, whereby if the latter is suitably calibrated, the peak flow in volume per minute can easily be read.
Inventors
- 👤 B Otsap
- 👤 E Neuman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:29
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/08; A61B5/087; A61B5/0871; G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/28; G01F1/72; G01P; G01P5/00; G01P5/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
242 words
An improved peak flow and/or velocity indicator adapted for testing the human breath in order to measure the pulmonary activity of a patient comprising: a body including a cylindrical bore having a first end and a second end; a mouthpiece means for use by a patient formed adjacent to the first end of the cylindrical bore and communicating therewith; a piston disposed in the cylindrical bore and slidable in the cylindrical bore between a first position adjacent to the first end of the cylindrical bore and a second position adjacent to the second end of the cylindrical bore; a spring disposed in the cylindrical bore so as to bias the piston toward its first position; at least one passage leading off from said cylindrical bore between the first position and the mouthpiece means and having an outlet therein; control means for permitting a predetermined flow of air through the outlet of the passage; indicator means disposed in the cylindrical bore between the second end of the cylindrical bore and the piston and slidable in the cylindrical bore, with the indicator means being normally positioned adjacent to and in contact with the piston and being moved by the piston as the piston moves from its first position towards its second position; and means for returning the indicator means to its normal position after the indicator means has been moved by the piston, said return means being separate and distinct of said indicator means.
Claim 2
Dependent Claim
242 words
An improved peak flow and/or velocity indicator adapted for testing the human breath in order to measure the pulmonary activity of a patient comprising: a body including a cylindrical bore having a first end and a second end; a mouthpiece means for use by a patient formed adjacent to the first end of the cylindrical bore and communicating therewith; a piston disposed in the cylindrical bore and slidable in the cylindrical bore between a first position adjacent to the first end of the cylindrical bore and a second position adjacent to the second end of the cylindrical bore; a spring disposed in the cylindrical bore so as to bias the piston toward its first position; at least one passage leading off from said cylindrical bore between the first position and the mouthpiece means and having an outlet therein; control means for permitting a predetermined flow of air through the outlet of the passage; indicator means disposed in the cylindrical bore between the second end of the cylindrical bore and the piston and slidable in the cylindrical bore, with the indicator means being normally positioned adjacent to and in contact with the piston and being moved by the piston as the piston moves from its first position towards its second position; and means for returning the indicator means to its normal position after the indicator means has been moved by the piston, said return means being separate and distinct of said indicator means.
Claim 3
Dependent Claim
71 words
The peak flow and/or velocity indicator as claimed in claim 1, wherein a cylindrical member, separable from but normally attached to the body, defines the portion of cylindrical bore between the second end of the cylindrical bore and the first position of the piston; and wherein the mouthpiece means is a mouthpiece that is separable from but normally attached to the body adjacent to the first end of the cylindrical bore.
Claim 4
Dependent Claim
29 words
The peak flow and/or velocity indicator as claimed in claim 2, wherein the cylindrical member is of transparent or translucent material and is provided with calibrations on its exterior.
Claim 5
Dependent Claim
52 words
The peak flow and/or velocity indicator as claimed in claim 1, wherein the passage is provided in an integral part of the body, which part is designed to be used as a handle for holding the device; and wherein the control means includes a cover, having an aperture of predetermined size therein.
Claim 6
Dependent Claim
59 words
The peak flow and/or velocity indicator as claimed in claim 1, wherein the passage comprises a plurality inclined apertures provided in the wall of the body; and wherein the outlet from said apertures is adapted to be covered by a sleeve mounted on the body, with the position of said sleeve relative said apertures controlling flow through the apertures.
Claim 7
Dependent Claim
58 words
The peak flow and/or velocity indicator as claimed in claim 1, wherein a cover closes the second end of the cylindrical bore; wherein exhaust port means is disposed in the cover and permits restricted escape of air from the cylindrical bore; and wherein the return means comprising a reset piston having an operating rod extending through the cover.
Claim 8
Dependent Claim
56 words
The peak flow and/or velocity indicator as claimed in claim 1, wherein a cover closes the second end of the cylindrical bore; wherein exhaust port means is disposed in the cover and permits restricted escape of air from the cylindrical bore; and wherein the return means comprising a reset plunger whose handle extends through the cover.
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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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |