Patent ID: 9744491
Date: 2017-08-29
CPC Classifications: A01G,B01D,Y02A

Claim:
1. An in-line modular air filtering system for ductwork, comprising: at least a first housing formed as a tubular body defined by at least one sidewall, the at least a first housing having an open first end and an opposite open second end and a bore defined by the at least one sidewall, wherein the sidewall of the body has a groove formed therein around the open first end, with the sidewalls of the groove parallel to an axis of the housing defined by the first open end and second open end, a first filter assembly disposed within the at least a first housing between the open first end and the open second end; at least a first cap for closing the first open end of the at least a first housing, the at least a first cap including a surrounding sidewall defining a housing attachment end, which has a first groove formed around a circumference thereof, sized to receive the sidewall of the open first end of the housing therein, and a second smaller groove formed in the first groove and parallel thereto, the at least a first cap further including a smaller opening for attaching to ductwork, the smaller opening positioned to align with the bore of the tubular body upon connection thereto; and at least a first seal having a stepped cross-sectional configuration which includes a generally L-shaped portion and a generally T-shaped portion, such that when placed in position with the open first end of the at least first housing and the at least a first cap, the seal lies within the groove around the first open end of the at least first housing, and the first and second grooves of at least a first cap.