Piston rings

Details Piston rings Piston rings

1993-10-25

1998-05-19

DePumpo, Daniel G.

Seal for a joint or juncture

Seal between relatively movable parts

Piston ring or piston ring expander or seat therefor

277434, 2988807, 29888073, 72 65, 72168, F16J 900

Patent

active

057527059

ABSTRACT:
A piston ring being planar, having a dished section and a planform giving desired radial pressure distribution on a co-operating cylinder wall and which ring is made form a steel resistant to stress relieving at the piston ring operating temperature. The dishing may be either positive or negative and may lie in the range from 0.025 to 0.75 mm. A method and apparatus are also described for the manufacture of such rings.

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