Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Patent
1993-05-13
1994-08-23
Withers, James D.
Metal working
Method of mechanical manufacture
Prime mover or fluid pump making
87 1, 87 6, 87 9, 264103, 264171, 264505, 264546, 277 1, 277227, 156148, H01R 4300, B29D 2800, E21B 3300
Patent
active
053395204
ABSTRACT:
A high temperature, high pressure resistant packing (e.g., for the packing gland of a valve stem) has a core of density 1.3-1.6 gm/cc that includes a plurality of strands, each strand including a flexible graphite tape, longitudinally corrugated and folded into at least two longitudinally extending partially superimposed layers. Preferable, each strand is overknitted with a reinforcing wire, the strands in the core are braided, and a jacket, which includes a carbide fiber, an inorganic fiber, and a phenolic fiber, is disposed about the core.
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