Mechanical seal
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 28, 2017
Issued Date -
N/A
app pub date -
May 19, 2016
filing date -
Oct 4, 2012
priority date (Note) -
In Force
status (Latency Note)
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Abstract
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.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
EAGLE INDUSTRY CO LTD | 1-12-15 SHIBA-DAIMON MINATO-KU TOKYO 1058587 |
International Classification(s)

- 2016 Application Filing Year
- F16J Class
- 765 Applications Filed
- 567 Patents Issued To-Date
- 74.12 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Itadani, Masatoshi | Tokyo, JP | 55 | 988 |
# of filed Patents : 55 Total Citations : 988 | |||
Ogawa, Yoshihiro | Tokyo, JP | 208 | 2536 |
# of filed Patents : 208 Total Citations : 2536 | |||
Shinomiya, Takashi | Tokyo, JP | 8 | 59 |
# of filed Patents : 8 Total Citations : 59 |
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Patent Citation Ranking
- 9 Citation Count
- F16J Class
- 33.33 % this patent is cited more than
- 8 Age
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
---|---|---|---|---|
11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Aug 28, 2028 |
Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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