Method for the manufacture of piston rings

Details Method for the manufacture of piston rings Method for the manufacture of piston rings

1989-06-27

1990-07-03

Goldberg, Howard N.

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

2988807, 29412, 72138, B23B 526

Patent

active

049379372

ABSTRACT:
A method for the manufacture of piston rings from a metal strip, at least includes providing rings having a predetermined non-circular profile, by the metal strip being first bent to a uniform radius of curvature at least 2 percent less than the minimum radius of curvature in the predetermined profile, then the curved strip being bent back to increase the radii of curvature of all the constituent portions of the strip forming the ring to the desired values of the predetermined profile.

REFERENCES:
patent: 3778877 (1973-12-01), Walkar
patent: 4497102 (1985-02-01), Ikutake
patent: 4499643 (1985-02-01), Ikutake
patent: 4856105 (1989-08-01), Brocksieper et al.

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