US Patent 7900934 Carbon dioxide gas sealing enclosed device

Patent 7900934 was granted and assigned to nok (retail company) on March, 2011 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

nok (retail company)

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

79009340

Patent Inventor Names

Hidekazu Kanagae0

Date of Patent

March 8, 2011

Patent Application Number

120848890

Date Filed

November 10, 2006

Patent Primary Examiner

‌

Vishal Patel

Patent abstract

To reduce a shaft insertion load and ensure a sealing function, a carbon dioxide gas sealing device has a seal ring provided in a mounting groove having a tapered groove bottom, a backup ring having a tapered portion corresponding to the tapered groove bottom, and a gap provided between the side wall surface at the low pressure side of the mounting groove and a side end surface at the lower pressure side of the backup ring, a tapered surface that approaches the peripheral surface of a housing from the side end surface on the high pressure side toward the lower pressure side is provided on the peripheral surface on the side opposite to the tapered portion and the tapered portion has two-stage tapers.