Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1985-03-05
1986-04-01
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277141, 277216, F16J 906
Patent
active
045793514
ABSTRACT:
A spring expander for oil control piston rings incorporates two spring mechanisms. One spring mechanism produces circumferentially directed hoop stress in the expander body when the expander body itself is contracted. A second radially acting spring mechanism is provided by circumferentially spaced spring fingers which radially deflect. Because the two spring mechanisms act together, the expander has a combined spring rate which is lower than the spring rate of either the circumferential spring mechanism or the spring rate of the radial spring mechanism. The expander also has expansion stops which limit the radial expansion of the spring fingers, and thereby limit the expansion of the associated rail ring to reduce pop-out during assembly. Contraction stops limit radial contraction of the rail ring with respect to the expander and maintain a clearance between the expander and the cylinder wall.
REFERENCES:
patent: 2833604 (1958-06-01), Hunt
patent: 3172672 (1965-03-01), Marien
patent: 3355180 (1965-10-01), Hamm
patent: 3477732 (1969-11-01), Warrick
patent: 3628800 (1971-12-01), Prasse
patent: 3741569 (1973-06-01), Mayhew
patent: 3762728 (1973-10-01), Prasse
patent: 4408770 (1983-10-01), Nemets
patent: 4429885 (1984-02-01), Chiba
patent: 4468040 (1984-08-01), Plant
Smith Robert I.
TRW Automotive Products Inc.
LandOfFree
Dual spring expander for oil control piston rings does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dual spring expander for oil control piston rings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual spring expander for oil control piston rings will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1081200