公开(公告)号：US20170074403A1

公开(公告)日：2017-03-16

申请号：US15263577

申请日：2016-09-13

Applicant: Waters Technologies Corporation

Inventor： Neal B. Almeida ,  Nathan Barrett

IPC: F16J15/3232 ,  F04B53/16 ,  F04B53/14 ,  F16J15/3212 ,  F04B19/22

CPC classification number: F16J15/3232 ,  F04B15/08 ,  F04B19/22 ,  F04B53/02 ,  F04B53/14 ,  F04B53/143 ,  F04B53/16 ,  F04B2015/0818 ,  F05C2225/12 ,  F16J15/3212 ,  F16J15/3236

Abstract: A seal assembly for pressurized fluid applications, including supercritical fluid chromatography applications, includes an annular body and a helical wound flat spring. A bore extends through the annular body. The annular body has an outer lip and an inner lip opposed to and spaced apart from each other. The inner lip, outer lip and an overhanging lip portion of the outer lip define a pocket in which the helical wound flat spring is disposed. A load line of the helical wound flat spring is directed substantially along a direction of separation between the inner and outer lips to bias apart the lips. Embodiments of the seal assembly have an improved distribution of contact pressure between the inside diameter of the seal assembly and the plunger with which the inside diameter seals, and between the outside diameter of the seal assembly and a gland surface with which the outside diameter seals.

Abstract translation: 用于加压流体应用的密封组件，包括超临界流体色谱应用，包括环形体和螺旋缠绕平板弹簧。 孔延伸穿过环形体。 环形体具有与彼此相对并间隔开的外唇缘和内唇缘。 外唇缘的内唇缘，外唇缘和突出的唇部限定了一个口袋，螺旋缠绕的平板弹簧设置在其中。 螺旋缠绕平板弹簧的负载线基本上沿着内唇和外唇之间的分离方向被引导以偏压嘴唇。 密封组件的实施例具有改善的密封组件的内径和内径密封的柱塞之间以及密封组件的外径与外径密封的密封表面之间的接触压力分布。

公开(公告)号：US20180313585A1

公开(公告)日：2018-11-01

申请号：US15565324

申请日：2016-04-07

Applicant: Waters Technologies Corporation

Inventor： Michael R. Jackson ,  Christopher Seith ,  Nathan Barrett ,  Kara O'Donnell ,  Neal B. Almeida ,  Wen Lu ,  James E. Usowicz ,  Maruth Sok ,  Kurt D. Joudrey ,  Joshua A. Shreve

IPC: F25B25/00 ,  B01D15/40 ,  B01D15/18 ,  G01N30/30

CPC classification number: F25B25/005 ,  B01D15/40 ,  G01N30/30

Abstract: The present disclosure relates to methodologies, systems and apparatus for cooling pump heads and providing balanced cooling and heat transfer between multiple pump heads. Multi-pump systems that are used to pump fluids that vary greatly in density with minor changes in temperature, such as the mobile phase of a C02-based chromatography system, require highly stable temperature conditions. In order to achieve a substantially equal average heat transfer between multiple pump heads and a coolant fluid, coolant fluid may be flowed through coolant passageways within the pump heads in a recursive and/or parallel coolant flow patterns. Such recursive and/or parallel coolant fluid flow patterns provide increased stability in temperature, compressibility, and density of the fluids passing through a multi-pump system.