The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 2016
Filed:
Aug. 14, 2014
Nippon Pillar Packing Co., Ltd., Osaka-shi, Osaka, JP;
NIPPON PILLAR PACKING CO., LTD., Osaka-Shi, JP;
Abstract
A gland packing having required characteristics is obtained by finding relationships between required characteristics and the value of the limiting oxygen index, and adequately defining the level of the required characteristics. The gland packing is configured by twisting or braiding a single or plurality of yarns that are formed by twisting fibers having a limiting oxygen index (LOI) of 21 to 30, preferably 22 to 26. The fibers contain fibers in which a flat ratio is defined as 1.1 to 2, the flat ratio being a value obtained by dividing the maximum value of an interval between two parallel straight line in a state where a section of each of the fibers is interposed between the straight lines, by the minimum value. The fibers contain fibers in each of which a sectional shape has one or more recesseshaving a depth h of 0.4 μm or more.