Compliant high temperature seals for dissimilar materials

Patent · Mon Jan 01 00:00:00 EST 2001

OSTI ID:874051

Rynders, Steven Walton ^[1]; Minford, Eric ^[2]; Tressler, Richard Ernest ^[3]; Taylor, Dale M ^[4]

---

1. Fogelsville, PA
2. Laurys Station, PA
3. Boalsburg, PA
4. Salt Lake City, UT

A high temperature, gas-tight seal is formed by utilizing one or more compliant metallic toroidal ring sealing elements, where the applied pressure serves to activate the seal, thus improving the quality of the seal. The compliant nature of the sealing element compensates for differences in thermal expansion between the materials to be sealed, and is particularly useful in sealing a metallic member and a ceramic tube art elevated temperatures. The performance of the seal may be improved by coating the sealing element with a soft or flowable coating such as silver or gold and/or by backing the sealing element with a bed of fine powder. The material of the sealing element is chosen such that the element responds to stress elastically, even at elevated temperatures, permitting the seal to operate through multiple thermal cycles.

• Research Organization: Air Products and Chemicals, Inc. (Allentown, PA)
• DOE Contract Number: FC26-98FT40343
• Assignee: Air Products and Chemicals, Inc. (Allentown, PA)
• Patent Number(s): US 6302402
• OSTI ID: 874051
• Country of Publication: United States
• Language: English

Related Subjects

compliant
temperature
seals
dissimilar
materials
gas-tight
seal
formed
utilizing
metallic
toroidal
sealing
elements
applied
pressure
serves
activate
improving
quality
nature
element
compensates
differences
thermal
expansion
sealed
useful
ceramic
tube
elevated
temperatures
performance
improved
coating
soft
flowable
silver
gold
andor
bed
fine
powder
material
chosen
responds
stress
elastically
permitting
operate
multiple
cycles
thermal expansion
elevated temperature
fine powder
dissimilar materials
sealing element
gas-tight seal
/277/