Seal for a joint or juncture – Seal between relatively movable parts – Circumferential contact seal for other than piston
Reexamination Certificate
2001-07-31
2003-07-01
Knight, Anthony (Department: 3676)
Seal for a joint or juncture
Seal between relatively movable parts
Circumferential contact seal for other than piston
C277S547000, C277S603000, C277S616000, C277S903000
Reexamination Certificate
active
06585271
ABSTRACT:
BACKGROUND
This disclosure relates generally to a seal member, an assembly of seal members, and a sealing method, all for the purpose of sealing against the ingress of air through a joint between two components.
Seals are often employed with drying equipment in which air and moisture-laden materials are passed through the length of a dryer tube to dry the materials. The discharge end of the dryer tube usually extends through an opening in an enclosure that contains a screw conveyor, or the like, for receiving the dried material from the dryer tube and passing the material to other equipment. Seals are often provided at the joint between the discharge end of the dryer tube and the enclosure to prevent the ingress of “tramp” air into the enclosure via the opening.
However, existing seals of this type are often very complicated and expensive and often are fabricated from stainless steel which further increases the cost.
Therefore, what is needed is an air seal of the above type which is simple in design, easy to install, and relatively inexpensive.
SUMMARY
According to an embodiment of the present invention a plurality of seal members are provided, each of which is formed by a strip of material having two interlocking portions. One of the interlocking portions of each seal member interlocks with an interlocking portion of another seal member, and the other interlocking portion of each seal member interlocks with an interlocking portion of still another seal member.
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IGS Sealing Technology Group brochure entitled “Rotary Sealing Systems for Calciners, Coolers, Dryers and Kilns”;—undated but admitted to be prior art.
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Halliburton Energy Service,s Inc.
Kice Warren B.
Knight Anthony
Pickard Alison K.
Roddy Craig W.
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