Composite piston of positive displacement hydraulic machine and

Details Composite piston of positive displacement hydraulic machine and Composite piston of positive displacement hydraulic machine and

1982-02-23

1985-01-22

Garrett, Robert E.

Expansible chamber devices

Piston

291565R, 29510, 29517, 72258, F16J 100, B23P 1510

Patent

active

044944489

ABSTRACT:
A core blank made of a material lighter than that of the piston is placed into a blind hollow of a barrel-shaped piston blank. The composite blank of the piston, thus formed, is subjected to a direct cold straight-through extrusion through a die. A piston is produced wherein the entire surface of the core is congruent with the internal surface of the piston and is in a clearanceless preloaded contact therewith.

REFERENCES:
patent: 2945293 (1960-07-01), Last
patent: 3577850 (1971-05-01), Harris
patent: 3605475 (1969-06-01), Eakin et al.
patent: 3633467 (1972-01-01), Watanabe et al.
patent: 3813909 (1974-06-01), Roger
patent: 3915074 (1975-10-01), Bristow et al.
patent: 3984904 (1976-10-01), Schlecht

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