72284804
Nov 14, 1967
Sep 10, 1968
Active Trademark
COMBINATION SEALS, PRIMARILY FOR DYNAMIC SEALING OF CYLINDER BORES AND PISTON RODS, WITH AN ELASTOMERIC O-RING SQUEEZED BEHIND A SECOND ELASTOMERIC RING OF NON-CIRCULAR CROSS SECTION AND WITH GENERALLY PARALLEL SEALING FACES ON ITS OPPOSITE SIDES
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