Seal

Details Seal Seal

1998-10-20

2000-10-31

Knight, Anthony

Seal for a joint or juncture

Seal between relatively movable parts

Piston ring or piston ring expander or seat therefor

277910, B60T 11236

Patent

active

061390216

ABSTRACT:
A seal for hydraulically sealing a piston rod (1) that travels axially into and out of a holder, preferably a hydraulic shock absorber. A sealing component (11) of elastic plastic has one edge (12) resting against the piston rod, tensioned over an elastomeric component, and accommodated along with that component in a sealing chamber (10). The object is to simplify the seal, reduce friction, and ensure that it will work even at very low temperatures. The tension is accordingly generated by two rings (13 & 14) of packing cord positioned diagonally opposite each other in the cross-section of the chamber. The rings, as long as they are not tensioned against each other, against the inner surface of the chamber, and against the back (15) of the sealing component, occupy most of the space inside the chamber.

REFERENCES:
patent: 4252331 (1981-02-01), Siegel
patent: 4991857 (1991-02-01), Pippert
patent: 5145340 (1992-09-01), Allard
patent: 5156410 (1992-10-01), Hom et al.
patent: 5743535 (1998-04-01), Hodgins

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