Piston ring

Details Piston ring Piston ring

1989-01-06

1989-10-31

Griffin, Donald A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

123193P, F16J 1532, F02F 7506

Patent

active

048772577

ABSTRACT:
A piston ring which consists of a sealing member supported by a flexible support structrue that deflects under applied loads to cause improved sealing and reduced wear. The support structure is constructed to react the applied loads such that the sealing member moves toward the cylinder wall to improve sealing and lower frictional drag and wear. Under operating loads, the sealing surface moves relative to the cylinder wall to form a coverging wedge shape that seals along its trailing edge while maintaining a fluid film to minimize wear and frictional drag. In the case of an oil control ring, the support structure may be arranged to provide better contact and oil flow control.

REFERENCES:
patent: 2657961 (1953-11-01), Lassberg
patent: 3612551 (1971-10-01), Grabill
patent: 4582330 (1986-04-01), Lew et al.
patent: 4672931 (1987-06-01), Biagini
patent: 4676668 (1987-06-01), Ide

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