Breath gas analysis module
First Claim
1. A breath gas analysis module for supplying a sample gas to a gas detector, said module comprising:
- a) a manifold having a body defining a chamber therein, the chamber including a main passage extending through the manifold body, an outlet passage extending into the manifold body from an outlet end at a base of the manifold body and toward said main passage, and a metering orifice extending between and in fluid communication with the main passage and an interior end of the outlet passage;
b) an inlet tube attached to the manifold body at one end of the main passage and defining an internal passage in fluid communication with the main passage;
c) a collection tube attached to the manifold body at another end of the main passage and defining an internal passage in fluid communication with the main passage;
tube internal passage and oriented to permit fluid flow into, butd) a resilient gas reservoir attached to a free end of the collection tube opposite an end thereof attached to the manifold body, the resilient gas reservoir defining a storage chamber therein which is in fluid communication with the collection tube internal passage; and
e) a check valve in said module between the metering orifice and a free end of the inlet tube opposite the main passage body and oriented to permit fluid flow into, but no back flow from, the main passage and the resilient gas reservoir when the outlet end of the outlet passage is closed.
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Accused Products
Abstract
A breath gas analysis module for supplying a sample gas to a gas detector includes a manifold having a body defining a chamber therein. The chamber includes a main passage extending through the manifold body, an outlet passage extending into the manifold body from an outlet end at a base of the manifold body and toward the main passage and a metering orifice extending between and in fluid communication with the main passage and an interior end of the outlet passage. An inlet tube is attached to the manifold body at one end of the main passage and defines an internal passage in fluid communication with the main passage. A collection tube is attached to the manifold body at another end of the main passage and defines an internal passage in fluid communication with the main passage. A check valve is positioned within the inlet tube internal passage and is oriented to permit fluid flow into, but not back from, the main passage. A resilient gas reservoir is attached to a free end of the collection tube opposite an end thereof attached to the manifold body. The resilient gas reservoir defines a storage chamber therein which is in fluid communication with the collection tube internal passage.
70 Citations
23 Claims
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1. A breath gas analysis module for supplying a sample gas to a gas detector, said module comprising:
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a) a manifold having a body defining a chamber therein, the chamber including a main passage extending through the manifold body, an outlet passage extending into the manifold body from an outlet end at a base of the manifold body and toward said main passage, and a metering orifice extending between and in fluid communication with the main passage and an interior end of the outlet passage; b) an inlet tube attached to the manifold body at one end of the main passage and defining an internal passage in fluid communication with the main passage; c) a collection tube attached to the manifold body at another end of the main passage and defining an internal passage in fluid communication with the main passage;
tube internal passage and oriented to permit fluid flow into, butd) a resilient gas reservoir attached to a free end of the collection tube opposite an end thereof attached to the manifold body, the resilient gas reservoir defining a storage chamber therein which is in fluid communication with the collection tube internal passage; and e) a check valve in said module between the metering orifice and a free end of the inlet tube opposite the main passage body and oriented to permit fluid flow into, but no back flow from, the main passage and the resilient gas reservoir when the outlet end of the outlet passage is closed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for analyzing a breath gas for a sample gas, said apparatus comprising:
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a) a gas detector having an inlet port; b) a manifold having a body defining a chamber therein, the chamber including a main passage extending through the manifold body, an outlet passage in fluid communication with the gas detector inlet port and extending into the manifold body from a base thereof and toward said main passage, and a metering orifice extending between and in fluid communication with the main passage and an interior end of the outlet passage; c) an inlet tube attached to the manifold body at one end of the main passage and defining an internal passage in fluid communication with the main passage; d) a collection tube attached to the manifold body at another end of the main passage and defining an internal passage in fluid communication with the main passage; e) a resilient gas reservoir attached to a free end of the collection tube opposite an end thereof attached to the manifold body, with the resilient gas reservoir defining a storage chamber therein which is in fluid communication with the collection tube internal passage; and f) a check valve in said module between the metering orifice and a free end of the inlet tube opposite the main passage body and oriented to permit fluid flow into, but no back flow from, the main passage and the resilient gas reservoir. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A breath gas analysis module for supplying a sample gas to a gas detector, said module comprising:
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a) a manifold having a body defining a chamber therein, the chamber including a main passage in the manifold body, an outlet passage extending into the manifold body and toward said main passage, and a metering orifice extending between and in fluid communication with the main passage and an interior end of the outlet passage; b) an inlet passage in the manifold body in fluid communication with the main passage; c) a collection passage in the manifold body and in fluid communication with the main passage; d) a check valve in the inlet passage and oriented to permit fluid flow into, but no back flow from, the main passage; and e) a resilient gas reservoir attached to the manifold at the collection passage, with the resilient gas reservoir defining a storage chamber therein which is in fluid communication with the collection passage.
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22. An apparatus for analyzing a breath gas for a substance, said apparatus comprising:
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a) a gas detector having an inlet port; b) a manifold having a body defining a chamber therein, the chamber including a main passage in the manifold body, an outlet passage in fluid communication with the gas detector inlet port and extending into the manifold body toward said main passage, and a metering orifice extending between and in fluid communication with the main passage and an interior end of the outlet passage; c) an inlet passage in the manifold body in fluid communication with the main passage; d) a collection passage in the manifold body and in fluid communication with the main passage; e) a resilient gas reservoir attached to the manifold at the collection passage, with the resilient gas reservoir defining a storage chamber therein which is in fluid communication with the collection passage; and f) a check valve in said module between the metering orifice and a free end of the inlet passage opposite the main passage and oriented to permit fluid flow into, but no back flow from, the main passage and the resilient gas reservoir. - View Dependent Claims (23)
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Specification