Patent ID: 11899032
Assignee: LECO CORPORATION
Field: Measurement (Instruments)
Classification: CPC F  G | IPC F  G

Claim 3:
4. The molar transfer device of claim 1, wherein the valve of the valve device is a rotary valve, wherein the valve body includes a cylindrical bore in communication with the upstream gas port, the midstream gas port, and the downstream gas port, and wherein the rotary valve comprises:
a rotating cylindrical chamber positioned in the cylindrical bore so as to rotate therein, the rotating cylindrical chamber having a first axial port, a second axial port, a third axial port, a first radial port in communication with the first axial port, a second radial port in communication with the second axial port, and a third radial port in communication with the third axial port, an outer cylindrical wall of the rotating chamber being spaced from the inner wall of the cylindrical bore to allow the first radial port, the second radial port, and the third radial port to be in communication with the upstream gas port, the midstream gas port, and the downstream gas port, respectively, regardless of the rotated position of the rotating cylindrical chamber;
a first valve end cap including a first cap port connected to the first ballast port and extending internally to align with one of the first axial port, the second axial port, and the third axial port depending on the rotational position of the rotating cylindrical chamber, and a second cap port connected to the second ballast port and extending internally to align with another one of the first axial port, the second axial port, and the third axial port depending on the rotational position of the rotating cylindrical chamber; and
a motor for rotating the rotating cylindrical chamber to different rotational positions in order to alter which of the first axial port, the second axial port, and the third axial port is aligned with the first cap port and the second cap port such that each of the first and second ballast chambers is sequentially filled with gas from the upstream gas stream, equilibrated with the midstream gas stream, and emptied into the downstream gas stream, wherein as the first ballast chamber is filled, the second ballast chamber is emptied and as the second ballast chamber is filled, the first ballast chamber is emptied.