Expander spring for piston rings

Details Expander spring for piston rings Expander spring for piston rings

1977-03-31

1978-05-23

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

267 15, F16J 900

Patent

active

040907201

ABSTRACT:
An expander spring for supporting an oil scraper ring in a groove of a piston is constituted by a sheet metal ring having an axis and forming an annular channel of generally U-shaped cross section. The channel has two side walls, forming, respectively, a radially inner and a radially outer, axially oriented side of the expander spring. The channel further has a base interconnecting the side walls and an open side opposite the base. A plurality of circumferentially distributed slots are provided in the side walls for increasing the resiliency of the expander spring in the circumferential direction, and a plurality of axially projecting support feet are carried by the free end of the radially inner side of the expander spring for supporting at least one oil scraper ring.

REFERENCES:
patent: 2785030 (1957-03-01), Olson
patent: 2789022 (1957-04-01), Olson
patent: 2837386 (1958-06-01), Mayfield
patent: 2859079 (1958-11-01), Olson

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