Variable output liquid chromatography pump drive
AssigneeWaters Technologies Corporation
InventorsJeffrey Musacchio, Joseph Michienzi
Life of this patent
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Abstract
Disclosed is a liquid chromatography solvent pump including a motor, a first piston, a second piston, and a variable output drive system coupling the motor to at least one of the first piston and the second piston. The variable output drive system includes a gearbox configured to provide a non-equal ratio between an input from the motor and an output delivered to at least one of the first piston and the second piston. The first piston and the second piston are configured to deliver a flow of solvent in a liquid chromatography system.
Claims20
A liquid chromatography solvent pump comprising:
- a motor;
- a first piston;
- a second piston;
- a variable output drive system coupling the motor to at least one of the first piston and the second piston, the variable output drive system comprising a gearbox configured to provide a non-equal ratio between an input from the motor and an output delivered to at least one of the first piston and the second piston, wherein the gearbox comprises a planetary gear system,
- wherein the first piston and the second piston are configured to deliver a flow of solvent in a liquid chromatography system.
A method of pumping solvent in a liquid chromatography system, the method comprising:
- providing a liquid chromatography solvent pump comprising a variable output drive system coupling a motor and at least one piston, the variable output drive system comprising a gearbox configured to provide a non-equal ratio between an input from the motor and an output delivered to the at least one piston, wherein the gearbox comprises a planetary gear system;
- and
- varying the output from an equal ratio to the non-equal ratio between the input from the motor and the output delivered to the at least one piston.
A liquid chromatography system comprising:
- a solvent delivery system, including a pump, the pump including a motor, a first piston, and a second piston;
- and
- a variable output drive system coupling the motor to at least one of the first piston and the second piston, the variable output drive system comprising a gearbox configured to provide a non-equal ratio between an input from the motor and an output delivered to at least one of the first piston and the second piston, wherein the gearbox comprises a planetary gear system,
- wherein the first piston and the second piston are configured to deliver a flow of solvent in the liquid chromatography system;
- a sample delivery system in fluidic communication with solvent delivery system;
- a liquid chromatography column located downstream from the solvent delivery system and the sample delivery system;
- and
- a detector located downstream from the liquid chromatography column.
Dependencies are inferred from the claim text.