Rod or piston seal

Details Rod or piston seal Rod or piston seal

F - Mech Eng,Light,Heat,Weapons

16

J

F16J 9/20 (2006.01) F16J 15/32 (2006.01)

Patent

CA 2131071

A rod or piston seal with a seal body of polymeric material has a seal surface for engagement with a relatively movable surface to be sealed which seal surface is interrupted in the direction of movement by at last two circumferentially extending grooves that are positioned at a selected distance from each other. The distance between adjacent grooves is respectively covered by an intermediate web. The ratio A of the width of the webs to the width of the grooves measured in direction of movement is 1:2 to 200:1, the ratio B of the width to the depth of the grooves is 10:1 to 1:5 and the depth of the grooves is about 1 to 200 micrometer. The seal is more economically manufactured, provides for a lower friction between the seal surface and the surface to be sealed, and maintains good operating characteristics over a long service period.

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