US 11,982,474 B2
Cooling of pump heads in carbon dioxide chromatography systems
Michael R. Jackson, Woonsocket, RI (US); Christopher Seith, Franklin, MA (US); Nathan Barrett, Milford, MA (US); Kara O'donnell, Watertown, MA (US); Neal B. Almeida, Cumberland, RI (US); Wen Lu, Westborough, MA (US); James E. Usowicz, Webster, MA (US); Maruth Sok, Providence, RI (US); Kurt D. Joudrey, Chelmsford, MA (US); and Joshua A. Shreve, Acton, MA (US)
Assigned to Waters Technologies Corporation, Milford, MA (US)
Filed by Michael R. Jackson, Woonsocket, RI (US); Christopher Seith, Franklin, MA (US); Nathan Barrett, Milford, MA (US); Kara O'donnell, Watertown, MA (US); Neal B. Almeida, Cumberland, RI (US); Wen Lu, Westborough, MA (US); James E. Usowicz, Webster, MA (US); Maruth Sok, Providence, RI (US); Kurt D. Joudrey, Chelmsford, MA (US); and Joshua A. Shreve, Acton, MA (US)
Filed on Apr. 1, 2020, as Appl. No. 16/837,260.
Application 16/837,260 is a division of application No. 15/565,324, granted, now 10,641,528, previously published as PCT/US2016/026386, filed on Apr. 7, 2016.
Claims priority of provisional application 62/145,837, filed on Apr. 10, 2015.
Prior Publication US 2020/0224938 A1, Jul. 16, 2020
Int. Cl. F25B 25/00 (2006.01); B01D 15/18 (2006.01); B01D 15/40 (2006.01); G01N 30/30 (2006.01)
CPC F25B 25/005 (2013.01) [B01D 15/18 (2013.01); B01D 15/40 (2013.01); G01N 30/30 (2013.01); F04B 2205/09 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A pump head cooling system, comprising:
a first pump head defining a first coolant passageway passing within the first pump head and a second coolant passageway passing within the first pump head, each passageway having an inlet into the first pump head and an outlet out of the first pump head, and wherein the outlet of the first coolant passageway is fluidly coupled to the inlet of the second coolant passageway;
a third pump head defining a third coolant passageway passing within the third pump head and a fourth coolant passageway passing within the third pump head, each passageway having an inlet into the third pump head and an outlet out of the third pump head, and wherein the outlet of the third coolant passageway is fluidly coupled to the inlet of the fourth coolant passageway;
a second pump head defining a fifth coolant passageway passing within the second pump head and a sixth coolant passageway passing within the second pump head, each passageway having an inlet into the second pump head and an outlet out of the second pump head, and wherein the outlet of the fifth coolant passageway is fluidly coupled to the inlet of the sixth coolant passageway, the outlet of the first coolant passageway is fluidly coupled to the inlet of the fifth fluid passageway, and the outlet of the fifth fluid passageway is fluidly coupled to the inlet of the sixth fluid passageway; and the outlet of the sixth fluid passageway is couped to the inlet of the second fluid passageway;
a fourth pump head defining a seventh coolant passageway passing within the fourth pump head and an eighth coolant passageway passing within the fourth pump head, each passageway having an inlet into the fourth pump head and an outlet out of the fourth pump head, and wherein the outlet of the third coolant passageway is fluidly coupled to the inlet of the seventh coolant passageway, the outlet of the seventh coolant passageway is fluidly coupled to the inlet of the eighth fluid passageway, and the outlet of the eighth fluid passageway is fluidly coupled to the inlet of the fourth fluid passageway; and
at least one coolant pump adapted to pump in parallel a first stream of coolant fluid through the first pump head and pump a second stream of coolant fluid through the second pump head.