Gap seal device

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 12000490
APP PUB NO 20230287980A1
SERIAL NO

18019880

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A gap seal device includes a housing with a fluid-filled guiding chamber and a multi-part piston that is translationally and/or rotationally moveable in the guiding chamber. The piston separates a high-pressure region from a low-pressure region of the guiding chamber. The piston forms an annular gap having a nominal gap width with an inner wall delimiting the guiding chamber. The piston has a stepped rod, a sleeve, which is slipped over a stepped-down region of the rod and which has a blind hole, and a coupling. The stepped-down region of the rod or in a tube portion of the sleeve includes a stiffness change. A gap width of the annular gap that is reduced compared with the nominal gap width can be set in a region radial to the stiffness change by stress-caused expansion of an outside diameter of the tube portion of the sleeve in accordance with the set stressing force.

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Patent Owner(s)

Patent OwnerAddress
HAMMELMANN GMBH59302 OELDE

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hartmann, Felix Oelde, DE 4 30

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