SCREW VACUUM PUMP

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20130058823A1
SERIAL NO

13698691

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A screw vacuum pump includes a male rotor, a female rotor, a stator, and a drive motor/motors. A screw gear portion of the male rotor, a screw gear portion of the female rotor, and the stator cooperatively form a gas working chamber. The stator has an inlet port and an outlet port. At least one of the male rotor and the female rotor has a rotor hollow portion which is opened on at least one end face side in a rotation-axis longitudinal direction of the male rotor and/or the female rotor. The drive motor is at least partially received in the rotor hollow portion.

First Claim

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Patent Owner(s)

Patent OwnerAddress
NATIONAL UNIVERSITY CORPORATION TOHOKU UNIVERSITYSENDAI-SHI MIYAGI 980-8577

International Classification(s)

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  • 2010 Application Filing Year
  • F01C Class
  • 159 Applications Filed
  • 103 Patents Issued To-Date
  • 64.78 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances2010201120122013201420152016201720180255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akutsu, Isao Miyagi, JP 13 43
Ohmi, Tadahiro Miyagi, JP 798 14083

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Patent Citation Ranking

  • 2 Citation Count
  • F01C Class
  • 16.76 % this patent is cited more than
  • 12 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges2913110301 - 1011 - 2021 - 300102030405060708090100110120130140

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