Apparatus and method for providing leak proof sealing between a

Details Apparatus and method for providing leak proof sealing between a Apparatus and method for providing leak proof sealing between a

1995-02-10

1998-03-17

Cuchlinski, Jr., William A.

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

738665, 200190, 340620, 439913, 439271, G01F 2300, H01H 2900, H01R 448, H01R 1352

Patent

active

057274215

ABSTRACT:
An apparatus and method for providing liquid and gas proof sealing between a metal rod and a plastic housing molded there around. The rod includes a plurality of annular intrusions or protrusions along a length thereof. The plastic material is formed around the rod and the annular intrusions or protrusions. After the plastic material has cooled the rod is translated linearly with respect thereto whereby the annular intrusions or protrusions cause a cold flow movement or disruption of the plastic material. This movement results in a liquid and gas tight sealing between the rod and the plastic housing. The invention herein has particular application for liquid level sensing probes located within gas pressurized vessels. In such examples the rod or rods are used for sensing liquid level by means of electrical conductivity with the sensed liquid. The sealing between the rod and plastic housing prevents the contained pressurized liquid and gas from escaping the vessel by flowing between the sensing rod or rods and their respective plastic housing.

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patent: 4879902 (1989-11-01), Loniello
patent: 5104253 (1992-04-01), Zielinski et al.
patent: 5272921 (1993-12-01), Foller et al.

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