Simpson Dura-vent Company, Inc.

Simpson-duravent

John R Jacklich

Eric Adair

Donald M Townsend

Direct vent cap

Vent cap

A chimney liner system for insertion into a masonry chimney from the top of the chimney down to a stove or fireplace insert. If an offset or a chimney shelf exists in the chimney, a flexible metal pipe member is connected to the bottom end of the chimney liner system. A ceramic heat resistant cloth formed as a sleeve encloses the flexible metal pipe member in selected systems, and in some systems, the sleeve encloses the entire chimney liner system. In some applications, the sleeve may be made from a fiberglass cloth sewn or connected to an inner blanket insulation.

Chimney liner system

A triple wall factory built thermally balanced on demand air flow metal chimney system in which the chimney sections are formed with an insulation chamber filled with insulation material which surrounds the chimney flue and an air passage chamber surrounding the insulation chamber. A negligible amount of cooling air flows upwardly through the air passage chamber during normal operation of the chimney. The air flow is separated from the inner flue by the insulating blanket. This allows the flue to maintain the proper elevated temperatures to resist creosote deposits. During periods of sustained high temperature operation or creosote fire episodes, substantial on demand cooling air flows upwardly through the air passage chamber drawing off heat from the inner flue and the outer wall.

Thermally balanced air flow chimney

An improved flue pipe for placement in the flue associated with an interior fireplace having a stove mounted therein. The flue pipe extends through the flue and has a spark arrestor mounted on its upper end. The lower end of the flue pipe has means for connecting it to the combustion gas outlet of the stove mounted in the fireplace. The flue pipe has a number of interconnected sections and several of the sections are of shapes permitting the flue pipe to extend through the damper region of the flue notwithstanding the reduced cross-sectional area of the damper region.

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Palo Alto, CA, United States of America

John R Jacklich