Device for forcing piston ring radially outwardly

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member

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277151, F16J 906

Patent

active

046376178

ABSTRACT:
A device for forcing a piston ring, which is a sealing member between the bore wall of a cylinder and the cylindrical outer surface of a piston, radially outwardly. The head of a plunger which forces the piston ring radially outwardly is semispherical and a sustantially conical hole for receiving therein the semispherical head of the plunger is formed in the inner peripheral surface of the piston ring in opposed relationship with the piston. Even when the axis of the plunger is misaligned when the center line or axis of the substantially conical hole, it can force the piston ring radially outwardly without producing any excessive force leading to the failure of the plunger and/or piston ring.

REFERENCES:
patent: 350004 (1886-09-01), Lang
patent: 1565859 (1925-12-01), Litter
patent: 2036632 (1936-04-01), Hepfinger
patent: 2076310 (1937-04-01), White
patent: 3180564 (1965-04-01), Fuhrmann et al.
patent: 3203705 (1965-08-01), Doperalski

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