F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent
F - Mech Eng,Light,Heat,Weapons
16
J
F16J 15/16 (2006.01) F16J 15/32 (2006.01) F16J 15/56 (2006.01)
Patent
CA 2380795
A rod or primary piston seal with a primary seal facing the space to be sealed and a secondary seal directed away therefrom has the primary seal fitted into a groove of a mounting element, which groove is open towards the relatively movable machine part and is defined at a side distal from the space to be sealed by a first lateral surface extending substantially perpendicularly to the seal axis, and the primary seal includes a sealing lip ring of tenacious plastic having a sealing lip engaging the machine part and being forced against the machine part by a profiled ring of elastomeric material, which profiled ring is supported on the base of the groove and engages the sealing lip ring with its inner surface, whereby the sealing lip ring has an essentially rectangular profile between the sealing lip and the end surface facing the distal side surface, the surface defining the sealing lip on the side facing away from the pressure encloses a maximum angle of 8° with the sealing axis in the relaxed condition of the seal, and the sealing lip ring is penetrated by at least one relief opening which is positioned between the high pressure side sealing lip and the outer surface of the sealing lip ring and opens in the low pressure side end surface. Such a seal has a wide field of use, can be used independent of the construction of the secondary seal, can be easily manufactured and is effective at the lowest pressure differentials. If a reversal of the pressure condition occurs, the mouth of the relief opening is uncovered and the liquid can flow back in opposite direction for equalization of the pressure.
Reichow Gunter
Timmermann Hans-Jurgen
von Borstel Dieter
Borden Ladner Gervais Llp
Carl Freudenberg Kg
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