Piston rings with a gap seal

Details Piston rings with a gap seal Piston rings with a gap seal

1987-06-19

1988-07-19

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277221, 277 1, 291566, F16J 914, B32P 1506

Patent

active

047580054

ABSTRACT:
A process for manufacturing a piston ring includes the step of forming a gap seal from an elongated member on one side and an "L-shape" on the other side; compressing the ring to close the gap seal and move the two ends into a nesting position; welding a wire across the outside surface of the ring to hold it in that compressed condition; placing a plurality of such compressed rings onto a mandrel; and tightly clamping them in axially aligned positions. The surfaces of the clamped rings are then ground into a cylindrical surface which simultaneously removes the wire and the weld. The nested ends including the elongated member and the "L-shaped" member nest together when compressed into a cylinder.

REFERENCES:
patent: 1488695 (1924-04-01), Miller
patent: 2140710 (1938-12-01), Meisel
patent: 2591176 (1952-04-01), Mason
patent: 2768865 (1956-10-01), Baker
patent: 3390889 (1968-07-01), Grover
patent: 4025079 (1977-05-01), Renk et al.
patent: 4713867 (1987-12-01), Fox

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