Back-up ring with slitted, folded portion for packing of hydraul

Details Back-up ring with slitted, folded portion for packing of hydraul Back-up ring with slitted, folded portion for packing of hydraul

1983-05-16

1984-02-14

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277200, 277220, F16J 900

Patent

active

044312008

ABSTRACT:
A back-up ring to prevent damage to a packing ring disposed in a groove on an internal piston within a cylinder. The back-up ring has a folded portion with concave and a convex surfaces to prevent damage to the ring when it is unfolded to enlarge the ring for placement in the groove and re-folds to seat in the groove. In another embodiment, holes are disposed in the folded portion to relieve stress concentrations accompanying folding and unfolding of the back-up ring.

REFERENCES:
patent: 3897072 (1975-07-01), Inka et al.

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