Rotary valve assemblies and methods of use for breath sample cartridge systems
An example breath collection and sampling device disclosed herein comprises a cartridge housing having a breath capture module, and a rotary valve operatively coupling a mouthpiece with the breath capture module. The rotary valve can have an open position where breath of a user can pass through the rotary valve, across capture sites of the breath capture module, and into a vacuum port, and a closed position for sealing the breath capture module from fluid passing through the rotary valve, while allowing the breath capture module to be exposed to a reagent for subsequent analysis of contents within the captured breath.
1. A device, comprising:
a cartridge housing comprising a breath capture module; and
a rotary valve operatively coupling a mouthpiece with the breath capture module, the rotary valve having a valve body with a central aperture, the valve body coupled to the cartridge housing via a spring, the rotary valve having:
an open position where breath of a user can pass through the rotary valve, across capture sites of the breath capture module, and into a vacuum port; and
a closed position for sealing the breath capture module from fluid passing through the rotary valve, while allowing the breath capture module to be exposed to a reagent.
2. The device according to claim 1 , wherein the central aperture of the rotary valve is configured to receive a stem of the mouthpiece.
3. The device according to claim 1 , wherein rotation of the rotary valve from the open position to the closed position causes protrusions of the valve body to rotate, allowing exhaust port seals and an annular upper valve seal to move downwardly to cover inputs and outputs of the breath capture module.
4. The device according to claim 3 , wherein the protrusions are configured to rest on ledges of the cartridge housing when the rotary valve is in the open position.
5. The device according to claim 4 , wherein the protrusions do not rest on the ledges when the rotary valve is in the closed position.
6. The device according to claim 5 , wherein the exhaust port seals and the annular upper valve seal comprise gaskets that seal the inputs and outputs of the breath capture module.
7. The device according to claim 1 , further comprising a gasket that provides a seal between the valve body of the rotary valve and a rotary valve receiver in the cartridge housing.
8. A rotary valve, comprising:
a valve body comprising:
a central aperture providing a path for the communication of breath into a breath capture module when the rotary valve is in an open position; and
a sealing surface that is configured to create a seal against at least a portion of an upper surface of the breath capture module to prevent the breath from flowing into the breath capture module when the rotary valve is in a closed position; and
a spring coupling the valve body to a cartridge housing, the valve body being configured to translate along an axis about which the valve body is configured to rotate within the cartridge housing.
9. The rotary valve according to claim 8 , wherein when the rotary valve is in the open position the breath of a user passes across capture sites of the breath capture module, and into a vacuum port.
10. The rotary valve according to claim 8 , wherein a reagent is flowable through the breath capture module without the reagent exiting the breath capture module via the inputs or outputs of the breath capture module when the rotary valve is in the closed position.
11. The rotary valve according to claim 8 , wherein the sealing surface comprises exhaust port seals and an annular upper valve seal comprising a closed-cell foam that engages with inputs or outputs of the breath capture module.
12. The rotary valve according to claim 8 , wherein the sealing surface prevents the breath from moving across capture sites of the breath capture module.
13. The rotary valve according to claim 8 , wherein the central aperture of the valve body is configured to receive a stem of a mouthpiece.