Reciprocating seal
OwnerHidenori Arai, Kazuki Takeno +3inventors
InventorsHidenori Arai, Kazuki Takeno, Ichiro Yamane, Shinobu Munekata, Katsumi Yamashina
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Abstract
The present invention relates to a reciprocating seal used, for example, for a shock absorber. A main seal lip 32 has a two-step lip structure including a first lip 32a and a second lip 32b and a plurality of protrusions 34 extending in the direction of the shaft are formed on sliding contact surface of the second lip 32b, thereby improving frictional force characteristics and, at the same time, improving sealing performance.
Claims1
A reciprocating seal that is provided in an annular space formed between a shaft and a housing, which move relatively to each other in a direction of the shaft, and has a seal lip brought into sliding contact with a surface of the shaft,
- wherein the seal lip has a two-step lip structure in which a plurality of protrusions extending in the direction in which a main seal lip relatively moves with respect to the surface of the shaft are formed on a surface of the lip of a second step.
Dependencies are inferred from the claim text.