Class 277/446 - Between rings

Subclass of Class 277 - Seal for a joint or juncture
Definition: Piston ring or piston ring expander wherein the feature
No. of patents: 20
Last issue date: 01/31/2012

Number	Title	Issue Date
8104771	Oil-control ring for an internal combustion engine An oil-control ring for an internal combustion engine, to be mounted between the sidewalls of a respective groove of a piston has two ring segments and an annular expander disposed between the two ring segments and presenting a support body defining a seating plane ...	01/31/2012
7370866	Sleeve element having a biasable end region, apparatus including same, and method of use A sleeve element having at least one end region configured to be biased into a laterally adjacent recess formed in one of a piston element surface and a bore surface is disclosed. A seal assembly is disclosed including two sleeve elements, each sleeve element having...	05/13/2008
7178451	Piston for metering equipment used in the food and/or chemical and pharmaceutical industries in particular, with improved seal systems A piston designed for use in metering machines employed in the food, chemical and pharmaceutical industries. The piston preferably has a cylindrical body with an annular bead in an intermediate position, a cap made of material designed to form a seal against the cyl...	02/20/2007
6450295	Feed screw device A ring-like lubricant supply device 6 is fitted into a recess 4 of a nut member 2. The lubricant supply device 6 contains a lubricant and is formed in an outer peripheral surface with notches 7. Tubular members 8 each having an outer diameter larger than ...	09/17/2002
6428014	Piston sealing ring assembly A piston sealing ring assembly (70) for sealing the piston/cylinder interface of a double-acting gas compressor including a first and second cut piston sealing ring (54,72) each bounded by first and second planar surfaces (6,8), the first piston sealing r...	08/06/2002
6378872	Seal assembly In an annular groove carried by one of a pair of reciprocally movable members, a pin extending into the annular groove and a sidewall of the other one of the pair of reciprocally movable members, a seal assembly comprising a ring carried by an annular bod...	04/30/2002
6260770	Sprinkler and sealing assembly therefor A rotary sprinkler comprising a stationary housing, a distribution member rotatable with respect to said housing, a stationary fluid supply member being in flow communication with an inlet port of the housing and with the distribution member, and a sealin...	07/17/2001
6193236	Packing seal having at least two axially adjacent segment rings A packing seal is provided which is intended in particular for reciprocating piston engines and which can be placed into a circumferential groove of a piston of such a reciprocating piston engine. The packing seal includes a first segment ring (1), which ...	02/27/2001
5603512	Side and gap sealed oil ring An oil control ring assembly having a sealing ring and a scraping is disposed within a groove in a piston. The scraping ring assembly has a scraping end portion and spaced apart ends defining a gap. The sealing ring has a sealing end portion and mated spa...	02/18/1997
5238255	Oil ring assembly An oil ring assembly comprising a pair of split rails and a piston ring spacer/expander on which said rails are mounted. Each rail is provided with a radially inwardly extending protrusion that lies substantially entirely within the thickness of the rail....	08/24/1993
5133564	Piston ring assembly for stirling engine A piston ring assembly for use in a stirling engine, which includes main rings each having a slit and a slanted surface for preventing ring rotations against one another wherein the main rings are engaged in a ring groove disposed at the exterior of a pis...	07/28/1992
4615531	Double ring piston sealing arrangement An improved dual ring sealing arrangement (10) for a piston head (17) having at least one circumferential groove (15) formed therein, wherein the arrangement comprises a first sealing ring (13) having a recess (23) adapted to receive a protrusion (22) for...	10/07/1986
4572520	Multi-component steel piston ring with rotation preventing rivet A piston ring for control of the oil on a cylinder wall that is comprised of thin upper and lower ring members disposed to contact the cylinder wall and an intermediate corrugated expander-spacer. The upper ring member has a headed rivet with the upper he...	02/25/1986
4516481	Piston and piston rings set New assembly of cylinder, lightweight piston and piston rings for engines and compressors comprising in a cylinder a reduced weight piston provided with a new simpler piston rings set of a high efficiency producing a very small tension against the cylinde...	05/14/1985
4384729	Interlocking dual plane gapped compression rings A dual planar compression ring arrangement where first and second compression rings for fitting into a single groove of a piston coaxial with and abutting one another. The first ring has a flat surface provided with an axial projection for fitting into th...	05/24/1983
4240644	Piston seal A piston seal having two spring tensioned rings which are biased radially toward the cylinder wall and seated in the uppermost one of the ring groove in the piston head. The upper ring has a relatively small and constant thickness of between 0.005 and 0.0...	12/23/1980
4111438	Sealing ring assemblies for pistons A sealing ring assembly for a piston has an outwardly springing carrier ring and an inwardly springing sealing ring which is located in an outer peripheral recess in the carrier ring. The gaps in the two rings of the assembly are displaced one from the ot...	09/05/1978
3999767	Piston ring system A multiple element seal ring system comprising a pair of pressure non-deformable split rings and a deformable expander ring adapted to be received in a groove. The split rings are provided with relatively narrow inner surfaces spaced from the groove botto...	12/28/1976
3991455	Coupled piston ring method of manufacture A ring assembly includes two side-by-side flat ring members of uniform rectangular cross-section each being split, with the confronting split ends having radially overlapping fingers to define a circumferentially sealing joint. The ring members are dimens...	11/16/1976
3942808	Piston ring assembly A piston ring assembly having a pair of resilient split rings of identical cross section in a single piston groove in which the rings contact each other over a large surface to maintain the gap of one ring diametrically opposed relative to the gap of the ...	03/09/1976

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Class 277/446 - Between rings