公开(公告)号：US11448623B2

公开(公告)日：2022-09-20

申请号：US16914292

申请日：2020-06-27

Applicant: LDETEK INC.

Inventor： Xavier Simard-Lecours ,  Dany Gagne ,  Louis Paradis

IPC: G01N30/32 ,  F16K1/36 ,  F16K1/46 ,  F16K11/22 ,  F16K31/122 ,  F16K11/02 ,  G01N30/02

Abstract: The valve assembly includes a main valve body defining a first inner cylindrical cavity, a support plate positioned above the main valve body, and an upper valve head positioned above the support plate. The upper valve head includes a bottom planar bottom surface and a plurality of discrete conduits, each conduit extending between an outer end and an inner end. The valve assembly further includes a sealing diaphragm interposed between the support plate and the upper valve head. The diaphragm can be engaged by plungers to selectively open or close corresponding gas circuits.

公开(公告)号：US10126278B2

公开(公告)日：2018-11-13

申请号：US15446781

申请日：2017-03-01

Applicant: LDETEK INC.

Inventor： Dany Gagne ,  Louis Paradis ,  Xavier Simard-Lecours

IPC: G01J3/28 ,  G01N30/74 ,  G01N21/67

Abstract: The micro-plasma emission detector unit is for use with a gas chromatograph. It includes an airtight housing having an internal ionization chamber, a pair of spaced-apart ionization electrodes positioned on opposite sides of the housing, and a set of opposite first and second holding members between which the housing is maintained inside the detector unit. Each electrode is maintained against an outer surface of the housing using a corresponding force-generating mechanism. With the proposed design, the risks of damaging the housing due to the thermal stresses are mitigated and the operating temperature of the detector unit can be increased.