Mechanical seal

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9581248
SERIAL NO

15159049

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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To provide a mechanical seal in which degradation or tearing of a bellows does not occur, the spring constant of the bellows is reduced, and the fluctuation in the load due to stretching and contracting of the bellows is reduced. An inside-type mechanical seal includes a sleeve fixed to a rotating shaft, and a cartridge fixed to a housing. A rotation-side sealing ring is provided to the sleeve. A fixed-side sealing ring, which slides against the rotation-side sealing ring, and a bellows for axially urging the fixed-side sealing ring is provided to the cartridge. The bellows is made from a metal; and the metal bellows has one end fixed to a case for holding the fixed-side sealing ring and another end fixed to the cartridge. The plate thickness of the metal bellows is set so as to be smaller than the plate thickness of the case or the cartridge.

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Patent Owner(s)

Patent OwnerAddress
EAGLE INDUSTRY CO LTD1-12-15 SHIBA-DAIMON MINATO-KU TOKYO 1058587

International Classification(s)

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  • 2016 Application Filing Year
  • F16J Class
  • 765 Applications Filed
  • 567 Patents Issued To-Date
  • 74.12 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances201620172018201920202021202220230255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Itadani, Masatoshi Tokyo, JP 55 988
Ogawa, Yoshihiro Tokyo, JP 208 2536
Shinomiya, Takashi Tokyo, JP 8 59

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Patent Citation Ranking

  • 9 Citation Count
  • F16J Class
  • 33.33 % this patent is cited more than
  • 8 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges1292498101 - 1011 - 2031 - 40020406080100120140160180200220240260280

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