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US 5,313,846 AGranted
Sample introduction valve for spectrometers with shuttle valve
AssigneeLeeman Labs Inc.
InventorsDavid A. March, Peter G. Brown, David A. Hotham
Life of this patent
Estimating the term…
Abstract
A sample introduction valve for spectrometers for selectively directing sample flow from two or more sources in which a slideably mounted shuttle provides in one position a pass through for one source and a by-pass for the other source and in a second position the opposite result.
Claims2
A sample introduction valve for spectrometers comprising in combination:
- a. a valve body;
- b. a shuttle slideably mounted in said body said shuttle having a by-pass chamber and a pair of spaced apart transverse passageways disposed therein;
- c. a first sample chamber for receiving an aerosol spray;
- d. a second sample chamber for receiving an aerosol spray, each of said chambers having a first outlet port aligned with one of said transverse passageways and a second outlet port aligned with said by-pass chamber;
- e. a drain pipe disposed in said valve body aligned with said by-pass chamber;
- and
- f. a sample outlet pipe connected to said spectrometer disposed in said valve body aligned with said transverse passageways when said shuttle is in a first position a fluid connection from said first sample chamber to said outlet is created and a fluid connection from said second sample chamber to said by-pass chamber to said drain is also created;
- and when said shuttle is in a second position, a fluid connection from said second sample chamber to said outlet is created and a fluid connection from said first sample chamber to said by-pass chamber to said drain is also created.
5 more elements
Dependencies are inferred from the claim text.