Patent · US Expired

Filter cartridge assembly for a gas purging system

US6187182A · kind A · utility

38Cited by

7References

9Claims

0Family size

Assignee

Semifab Incorporated · US

Inventors

Gerald D. Reynolds · Hollister, US
Gary M. Gallagher · Austin, US
John Burns · Colorado Springs, US
Mark V. Smith · Colorado Springs, US

Key dates

Filing date	Jul 31, 1998
Grant date	Feb 13, 2001
Priority date	—
Expiry date	Jul 31, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/7936
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The filter cartridge assembly has a valve body having an interior flow passage, a filter across the interior flow passage, and a check valve assembly in the valve body. The filter removes particulates as small as 0.003 microns. A check valve element adjacent to a valve seat in the interior flow passage has a check valve poppet and a stem. The check valve poppet has a relatively narrow neck, and the check valve poppet is tapered inwardly from the outlet end toward the neck at an oblique angle relative to the longitudinal axis of the valve body that is substantially equal to the oblique angle of the annular valve seat.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.