Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1982-12-13
1984-08-28
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
F16J 906
Patent
active
044680406
ABSTRACT:
An annular spacer-expander spaces and positions two rails in a piston ring groove of a piston for an internal combustion engine. The spacer-expander comprises a plurality of U-shaped members which lie in respective angularly spaced planes including the spacer-expander axis and whose arms open inwardly of the spacer-expander for urging radially inner ends of respective rails into contact with respective radial walls of the piston ring groove. The U-shaped members are interlinked in serpentine fashion to give the spacer-expander circumferential resilience. The ends of the U-shaped members are bent outwardly for urging the rails into contact with an associated cylinder or liner. A plurality of rail spacer lugs are provided for controlling axial movement of the radially outer ends of the rails. Each ring spacer lug is located between a pair of adjacent U-shaped members and is connected to that portion of one of the pair which forms the base of the U.
REFERENCES:
patent: 3580589 (1971-05-01), Prasse
patent: 4053165 (1977-10-01), Hartley
AE PLC
Smith Robert I.
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