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US 11,982,355 B2Granted
Yarn and gland packing
AssigneeNippon Pillar Packing Co., Ltd.
InventorsMasaru Fujiwara, Misato Izuka, Ryoji Hamaguchi, Naoyuki Sawamoto
Life of this patent
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Abstract
A yarn includes elongated pieces of expanded graphite sheet and a tubular member made of knitted or braided fibers. In the tubular member, the pieces of expanded graphite sheet are twisted and packed. The yarns are knitted, or bundles of the yarns are twisted to form a gland packing.
Claims6
A yarn comprising elongated pieces of expanded graphite sheet that are packed in a tubular member made of knitted or braided fibers,
- each of the elongated pieces of expanded graphite sheet having an elongated, thin-plate-like shape twisted around its own longitudinal center line at one or more turns, wherein a longitudinal end of the elongated, thin-plate-like shape is rotated by 180 degrees per turn around the longitudinal center line while another longitudinal end thereof is fixed.
A yarn comprising a flattened shape and elongated pieces of expanded graphite sheet that are packed in a tubular member made of knitted or braided fibers,
- each of the elongated pieces of expanded graphite sheet having an elongated, thin-plate-like shape twisted around its own longitudinal center line and including flexed portions and a longitudinal intermediate portion that is bent at each of the flexed portions.
Dependencies are inferred from the claim text.