Robert Broyles

US Patent:

53582845, Oct 25, 1994

Filed:

Jan 7, 1993

Appl. No.:

8/001762

Inventors:

Robert K. Broyles - Knoxville TN

Assignee:

Pathway Bellows, Inc. - Oak Ridge TN

International Classification:

F16L 1112

US Classification:

285 47

Abstract:

An expansion joint for connecting sections of a duct carrying high temperature gases includes upstream and downstream frame portions connected to the ducts, a peripheral fabric belt connecting the frame portions, and thermal insulation positioned between the belt and a primary internal liner mounted on a frame portion and projecting toward the opposite frame portion. A thermal insulation pillow is positioned between the primary internal liner and the flowpath, and a thermal panel made up of floating segments is positioned between the insulation pillow and the flowpath. At least the upstream frame portion includes a conical member extending at an oblique angle to inner and outer sides of the frame portion. In the illustrated embodiments, a secondary liner is mounted on the opposite frame portion and projects toward the frame portion carrying the primary liner, the primary internal liner being positioned between the secondary internal liner and the gas flowpath. An insulation pillow and thermal panel is also provided on the secondary internal liner.

US Patent:

47491680, Jun 7, 1988

Filed:

Jan 10, 1986

Appl. No.:

6/817815

Inventors:

Ronald K. Maxwell - Irving TX
Robert K. Broyles - Knoxville TN

Assignee:

Pathway Bellows, Inc. - El Cajon CA

International Classification:

F16K 320
F16K 2500

US Classification:

251174

Abstract:

In a sealing mechanism for a damper plate for a duct, seal members are made in the form of multi-convoluted sheet metal bellows, which engage each side of the damper plate around the periphery of the duct. When the duct is moved from an open position to a closed position, it slides between the seal elements forcing them apart. When the plate is slid from a closed position to an open position, the spring bias in the bellows members will cause them to expand to engage each other.