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US 10,834,807 B1Granted
ICP torch assembly with retractable injector
AssigneeElemental Scientific, Inc.
InventorsDaniel R. Wiederin, Gary J. Barrett
Life of this patent
Estimating the term…
Abstract
A plasma torch assembly (e.g., for an ICP-MS or ICP-AES instrument) with a retractable injector is disclosed. In implementations, the torch assembly includes an injector that can be extended or retracted relative to an auxiliary gas tube of the torch assembly. The injector can be slidably coupled to a torch body that supports the auxiliary gas tube, such that the injector can be moved forward and backward through a passage of the torch body, causing it to extend/retract relative to the auxiliary gas tube.
Claims17
A torch assembly, comprising:
- a torch body;
- an auxiliary tube supported by the torch body;
- an injector adjustable to extend or retract relative to the auxiliary tube, the injector including an injector body and an injector tube, the injector body defining a threaded body portion;
- an outermost tube coaxially surrounding the injector and extending beyond an end of the auxiliary tube;
- and
- a threaded coupling received by the threaded body portion, the threaded coupling connecting the injector body with the torch body, the injector tube adjustable with respect to the auxiliary tube by rotating the injector body relative to the threaded coupling to select a given use position of the injector tube relative to the auxiliary tube.
3 more elements
A torch assembly, comprising:
- a torch body;
- an auxiliary tube supported by the torch body;
- an injector adjustable to extend or retract relative to the auxiliary tube, the injector including an injector body and an injector tube, the injector body defining a threaded body portion;
- an outermost tube coaxially surrounding the injector and extending beyond an end of the auxiliary tube;
- and
- a threaded coupling received by the threaded body portion, the threaded coupling connecting the injector body with the torch body, the injector tube actuatable with respect to the auxiliary tube by rotating the injector body relative to the threaded coupling;
- and
- a scale printed or etched in proximity of an interface between the injector body and the threaded coupling, the scale having indicia corresponding to a position or level of extension/retraction of the injector tube.
5 more elements
A torch assembly, comprising:
- a torch body supporting one or more tubes;
- an injector adjustable to extend or retract relative to a first one of the one or more tubes, the injector including an injector body and an injector tube, the injector body defining a threaded body portion;
- a second one of the one or more tubes coaxially surrounding the injector and extending beyond an end of the first one of the one or more tubes;
- a substantially flat disc shaped shielding element, the shielding element including a central aperture and being disposed around the second one of the one or more tubes that is supported by the torch body;
- and
- a threaded coupling received by the threaded body portion, the threaded coupling connecting the injector body with the torch body, the injector tube adjustable with respect to the one or more tubes by rotating the injector body relative to the threaded coupling to select a given use position of the injector tube relative to the one or more tubes.
3 more elements
A torch assembly, comprising:
- a torch body;
- an auxiliary tube supported by the torch body;
- an injector adjustable to extend or retract relative to the auxiliary tube, the injector including an injector body and an injector tube, the injector body defining a threaded body portion;
- an outermost tube coaxially surrounding the injector and extending beyond an end of the auxiliary tube;
- a substantially flat disc shaped shielding element, the shielding element including a central aperture and being disposed around the outermost tube that is supported by the torch body;
- and
- a threaded coupling received by the threaded body portion, the threaded coupling connecting the injector body with the torch body, the injector tube adjustable with respect to the auxiliary tube by rotating the injector body relative to the threaded coupling to select a given use position of the injector tube relative to the auxiliary tube.
4 more elements
Dependencies are inferred from the claim text.