EP0133326A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Disposable breath analyzer
Assignee: Diversified Medical Technologies Inc
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Filing: 1984-02-22
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Granted: —
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Expires: 2004-02-22
Abstract
Abstract A portable, pocket-size, disposable breath analyzer device (10) is disclosed characterized by a tubular housing (12) having an end portion (14) formed to be placed in the mouth of a user and a central portion carrying a canister (24) filled with a quantity of potassium di-chromate impregnated silica gel (30) adapted to provide a visual color indication of the amount of alcohol contained in a user's breath sample blown through the housing. A pair of valve members (40) are positioned on opposite sides of the canister within the housing to prevent any back aspiration of air to the user from the canister (24). Three embodiments of the invention are disciosed, each adapted to yield a visual indication of the approximate blood alcohol level of an individual user.
Inventors
- 👤 Robert E. Schmitz Ii
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 18:02
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/98
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
129 words
A low cost breath analyzer device (10) characterized by: a tubular housing (12) having a first portion (14) adapted to be placed in the mouth of a user and a second portion (18) defining a chamber in fluid communication with the first portion; a quantity of colorimetric material (30) disposed within the chamber (30) adapted to change color in response to the presence of alcohol carried by a breath sample blown through the housing (12) into the chamber; valve means (40) positioned within the chamber (18) to prevent fluid flow through the chamber (18) into the housing (12); and indicia (50) positioned relative said colorimetric material (30) to indicate the percent ratio of blood alcohol content in the breath sample blown through the housing (12) into the chamber (18).
Claim 2
Dependent Claim
129 words
A low cost breath analyzer device (10) characterized by: a tubular housing (12) having a first portion (14) adapted to be placed in the mouth of a user and a second portion (18) defining a chamber in fluid communication with the first portion; a quantity of colorimetric material (30) disposed within the chamber (30) adapted to change color in response to the presence of alcohol carried by a breath sample blown through the housing (12) into the chamber; valve means (40) positioned within the chamber (18) to prevent fluid flow through the chamber (18) into the housing (12); and indicia (50) positioned relative said colorimetric material (30) to indicate the percent ratio of blood alcohol content in the breath sample blown through the housing (12) into the chamber (18).
Claim 3
Dependent Claim
28 words
The device of claim 1 further comprising a cannister (24) positioned within the chamber (18) sized to store the quantity of colorimetric material (30) within the chamber (18).
Claim 4
Dependent Claim
27 words
The device of claim 2 further comprising means (52) mounted to an end (20) for indicating the volume of the breath sample blown through the housing (12).
Claim 5
Dependent Claim
34 words
The device of claim 2 further comprising a piston (70) disposed within the chamber (18) and reciprocally mounted upon the cannister (24) to monitor the volume of air passing through the the housing (12).
Claim 6
Independent Claim
20 words
The device according to any preceding claim wherein the valve means (40) comprises a check valve positioned within said chamber.
Claim 7
Independent Claim
32 words
The device according to any preceding claim wherein the valve means (40) comprises a pair of check valves (40) each positioned on opposite ends of the cannister (24) within the chamber (18).
Claim 8
Dependent Claim
18 words
The device of claim 6 wherein said pair of check valves (40) each comprise a flapper diaphragm valve.
Claim 9
Independent Claim
19 words
A device according to any preceding claim wherein the colorimetric material (30) comprises a potassium dichromate impregnated silica gel.
Claim 10
Dependent Claim
16 words
The device of claim 9 wherein said colorimetric material (30) additionally includes a sodium bisulfate buffer.
Claim 11
Dependent Claim
51 words
The device of claim 1 wherein the chamber (18) contains plurality of cannisters (60), each containing a quantity of potassium dichromate impregnated silica gel buffered with differing quantities of sodium bisulfate to change color in response to differing quantities of alcohol carried by the breath sample blown through the housing (12).
Claim 12
Independent Claim
22 words
A device according to any preceding claim further comprising a removable seal (42, 46) formed on opposite ends of the housing (12).
Claim 13
Independent Claim
17 words
The device according to any preceding claim wherein said housing is formed of a generally transparent material.
References Cited (Backward Citations)
No citation records indexed.
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