Motor-driven roots pump with smooth activation in low-temperature environment

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11401936
APP PUB NO 20210025388A1
SERIAL NO

16930920

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Abstract

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A motor-driven Roots pump includes a housing, a drive shaft and a driven shaft that have axial lines parallel with each other, and a gear chamber. The housing includes a first partition that has a first defining surface, a second partition having a second defining surface, and a relief recess. An addendum circle of the drive gear and an addendum circle of the driven gear intersect with each other at a first intersection point. A plane that includes both the axial lines is defined as an imaginary plane. The first intersection point is located on a side of the imaginary plane on which the drive gear and the driven gear start meshing with each other. An opening of the relief recess is opposed to the first intersection point and is arranged in a region on a side of the imaginary plane on which the first intersection point is located.

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Patent Owner(s)

Patent OwnerAddress
KABUSHIKI KAISHA TOYOTA JIDOSHOKKIAICHI PREFECTURE JAPAN AICHI

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hirano, Takayuki Kariya, JP 86 565
Kashiwa, Shintaro Kariya, JP 7 6
Masaki, Daisuke Kariya, JP 17 55
Shinoda, Fumiya Kariya, JP 14 2
Takani, Naoki Kariya, JP 5 6

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