Roots pump having a seal member with first and second projections

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11353021
APP PUB NO 20210340979A1
SERIAL NO

17241730

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A housing unit of a Roots pump includes a rotor housing, which includes a peripheral wall, and a cover member, which closes an opening of the rotor housing. At least one of a mating surface of the peripheral wall or a mating surface of the cover member includes an annular first groove accommodating a seal member. The rotor housing includes a bulging portion including a second groove. The seal member incudes first projections, which project from an annular seal body, and a second projection, which projects further radially inward from the seal body than the first projections. Each first projection includes a distal end that contacts a side surface on a radially inner side or on a radially outer side of the first groove. The second projection is arranged in the second groove to determine the position of the seal body in the first groove.

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Patent Owner(s)

Patent OwnerAddress
KABUSHIKI KAISHA TOYOTA JIDOSHOKKIKARIYA-SHI AICHI 448-8671
NOK CORPORATIONMINATO-KU TOKYO 105-8585

International Classification(s)

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
Miki, Yohei Aso, JP 20 185
Shinoda, Fumiya Kariya, JP 14 2
Takani, Naoki Kariya, JP 5 6

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