Piston or rod seal

Details Piston or rod seal Piston or rod seal

F - Mech Eng,Light,Heat,Weapons

16

J

277/47

F16J 15/32 (2006.01)

Patent

CA 2031345

ABSTRACT A piston or rod seal includes a first groove in a seal housing, which groove is radially inwardly open towards a relatively movable machine part and receives a rubbing seal ring made of PTFE material and an elastic O-ring of rubber material. The O-ring is sealed against a groove base of the first groove and forces the rubbing seal ring against the relatively movable machine part. The rubbing seal ring has, on its side adjacent the relatively movable machine part, at least two sealing ridges which are separated by a second groove and, on its side adjacent the O-ring, a conical. surface. The second groove has a rounded groove base with a radius, which is substantially equal a radial depth of the second groove. The conical surface extends across the radial planes of all of the sealing ridges without an appreciable change in direction. The piston or rod seal has a substantially improved sealing effect for a longer period of use.

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