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Class 277/460 - Circumferential groove, channel, recess, or bevel


Subclass of Class 277 - Seal for a joint or juncture
Definition: Piston ring wherein the groove, channel, recess, or bevel
No. of patents: 43
Last issue date: 08/16/2011


1    
NumberTitleIssue Date
7997584Piston ring for the piston of an internal combustion engine
A piston ring for the piston of an internal combustion engine, comprising, on a lower side of the piston ring, a circular, radially inner bezel, the width thereof reducing, on both sides of the ring stop, up to the side of the piston ring that is opposite the ring s...
08/16/2011
7722051Seal ring
A seal ring for sealing an annular clearance between two members, which are made rotatable relative to each other. The seal ring is provided with a relief 5 throughout the circumference of a sliding face side to confront the side wall face 72 of an ann...
05/25/2010
7654536Seal ring
A seal ring for sealing an annular clearance between two members, which are made rotatable relative to each other. The seal ring is provided with a relief 5 throughout the circumference of a sliding face side to confront the side wall face 72 of an ann...
02/02/2010
7523944Seal ring
A plurality of first inclined faces (51) are provided on a side face of a seal ring (5) to be distanced away from each other. The first inclined face (51) opens to an inner circumferential face (23) and the side face of the seal ring (...
04/28/2009
7429048Piston ring with projection
A piston ring is positioned in a groove of a piston and has an outer peripheral face. The outer peripheral face is generally tapered to an edge and includes a projection. The projection extends radially outwardly from the outer peripheral face along an upper surface...
09/30/2008
7341258Cammed seal assembly with sealing ring having an angled leg portion and foot portion with elastomeric energizer element
A seal assembly seals first and second operational surfaces spaced apart by a gap. The first surface includes a seal groove having a base surface and first and second side surfaces. A sealing element in the seal groove has a foot portion extending parallel to the ba...
03/11/2008
7306234Oil control ring for pistons of internal combustion engines
The invention relates to an oil control ring for pistons of internal combustion engines. The aim of the invention is to provide an improved shape-adaptation capacity in comparison to prior art, with a tangential force that enables the ring to guarantee low friction ...
12/11/2007
7306233Combined oil control ring
In mounting a combined oil control ring in a ring groove formed in a piston, the combined oil control ring is mounted in a form that an opening between but ends of an oil ring body is widened. In such an operation, it is likely that a coil expander falls off the oil...
12/11/2007
7207571Steel piston ring
In a corner portion (2) defined between an outer peripheral surface (4) and a lower-side surface (3) of a steel piston ring (1), a groove (5, 6) having either an approximately quadrangular shape with a length of one side of 0.05 to...
04/24/2007
7044473Piston and piston ring assembly
Two seal rings are provided comprising an upper ring and a lower ring, the rings having a common axis, a common outer cylindrical surface, a common inner cylindrical surface, and a couple of facing surfaces. The facing surfaces form an engaging length in a radial se...
05/16/2006
7032882Valve assembly having novel flow characteristics
A valve assembly including a housing having a flow channel and an annular surface surrounding the flow channel, a slide plate movable to a closed position, and a seal ring positioned between the annular surface and the slide plate. The seal ring includes a first and...
04/25/2006
6997460Piston ring for piston engines
The invention relates to a slot piston ring (1) for the pistons of internal combustion engines or compressors, having a peripheral recess (9) (a so-called scraper ring) that extends close to the slot (2) on the external periphery (3) of t...
02/14/2006
6962343Seal ring
A seal ring is provided, which is capable of maintaining a stable sealing performance for a long period, in which a cut portion is provided at one position in a circumferential direction of a seal ring, a convex portion is provided at a first cut end portion, a rece...
11/08/2005
6959930Combination oil scrapper ring/gas seal assembly
A ring assembly, including a first oil scraper ring, a center oil scraper ring and a gas seal ring, adapted for disposition in a single groove of a packing cup which can be stationarily mounted over and around a reciprocally movable piston rod of a gas compressor. T...
11/01/2005
6938879Valve seal with pressure relief channels and expansion voids
A flexible, resilient incompressible seal for a butterfly valve is disclosed formed from a loop having a perimeter mounting surface and a perimeter sealing surface with first and second oppositely disposed axial surfaces extend between the perimeter sealing and moun...
09/06/2005
6896270Sealing device for a bearing arrangement
There is provided a sealing device (10) for a unitised grease-or oil-lubricated package bearing assembly comprising a twin outer race (14) and two inner races (15, 16) arranged next to each other on a shaft (12), with their faces abutting...
05/24/2005
6726217Piston ring for the piston of an internal combustion engine
The aim of the invention is to prevent deposition of material on the piston ring flank (6) of a piston ring (3) for the piston (1) of an internal combustion engine. To this end, said piston ring is provided with channels (7) which are dis...
04/27/2004
6712362Primary seals for master-slave cylinder systems
In a master/slave cylinder system for clutches or brakes, primary seals have bevels which interact with similar bevels of formations on housings of the respective cylinders. Along with the lowest possible friction in the region of the sealing lips, this permits carr...
03/30/2004
6543784Wear compensating plunger-and-barrel seal for hydraulic fuel injectors
In a fuel injector having a plunger-and-barrel pumping assembly, a sealing member is mounted within an annulus of a plunger to prevent the dilution of pressurized fuel within the barrel of the tool. The sealing member includes a hollowed cavity which trap...
04/08/2003
6454271Combined oil ring
A combined oil ring is comprised of an oil ring and an expander. The cross section of the oil ring is a generally I-shape, and the outer circumferential surfaces of outer rail portions form sliding surfaces to make contact with the cylinder wall surface. ...
09/24/2002
6439578Sealing ring combination
Two axially abutting individual rings (4, 5) arranged in a shared casing recess (3) at the passage (6) of a component (2) to be sealed, which each is formed of several ring segments (4', 5') pressed against the component (2) to be sealed by a common perip...
08/27/2002
6378872Seal 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
6283478Piston ring structural body and method of mounting the piston ring structural body
The present invention provides a piston ring structural body composed of an outer ring continuously formed of a resinous material, an inner ring continuously formed of a resinous material and a ring tensile force applying member for pressing the outer rin...
09/04/2001
6257590Sealing structure and method of mounting piston ring structural body for use in the sealing stucture
The present invention provides a sealing structure employing a piston ring structural body of a type wherein an outer ring continuously formed of a resinous material is pressed radially outwards by a metal coil expander via a metal inner ring provided wit...
07/10/2001
6254103Seal
A seal comprises a support member having an outer periphery of substantially circular form, and a resilient seal member mounted upon the support member, the seal member, when occupying a relaxed condition, having an outer periphery of generally circular f...
07/03/2001
6113107Self-lubricated and-adjusted piston ring
This invention relates to piston compression ring assemblies, each of which consists of a main ring element and an auxiliary ring element. The assemblies can by themselves adjust the radial gaps between the assemblies and the liner, and the gaps between t...
09/05/2000
5901963Gas nitrided taper faced keystone piston ring incorporating a sealing land and orientation groove
A piston ring having a keystone shape and an orientation feature on one of its surfaces for ensuring proper orientation of the ring during installation. The piston ring preferably has an outer peripheral surface that includes a sealing land with a nitride...
05/11/1999
5730263Vibration damper
A vibration damper includes a pressure tube in which a piston on a piston rod which can move axially is guided by means of a piston rod guide which closes the pressure tube. The piston divides the pressure tube which is filled with damping medium into two...
03/24/1998
5450783Low emission piston ring
A piston assembly such as that used with an internal combustion engine includes an annular cylinder having an inner cylinder wall defining a bore. An annular piston is reciprocal along a longitudinally extending axis within the bore of the cylinder. The p...
09/19/1995
5398945Piston ring of "Y" cross-section
A piston ring having a "Y" cross section is received within an annular groove of a piston which is reciprocable within a cylinder. The piston ring is formed from a single strip of material with an integral inner end. Two flanges extend laterally outwardly...
03/21/1995
5395219Hydraulic pump having cam driven, spring biased piston
A hydraulic pump including a housing having a housing bore with a piston sliding in an axial direction in the bore and a pump chamber being defined in cavity adjacent one end of the piston. A piston drive mechanism is provided in a housing chamber defined...
03/07/1995
4909520Seal
A shaft or piston seal for preventing unidirection fluid flow between two concentric mating members has an annular body in the form of a ring-like member with a polygonal profile in right cross section having innermost and outermost radial portions. One o...
03/20/1990
4889351Hydraulic seal
A seal for a hydraulic cylinder is disclosed and includes a static seal element and a dynamic seal element, the dynamic seal element having a continuous, annular form, the form being inscribable in an annular section of a truncated cone and having an anti...
12/26/1989
4877257Piston ring
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 ...
10/31/1989
4867294Accumulator piston for automotive transmission
In an automotive transmission, an improved accumulator of the piston-cylinder type. The piston and cylinder are formed of the same material, e.g., aluminum, whereby the two components thermally expand at the same rate, thereby providing leak-free operatio...
09/19/1989
4629200Non-metallic piston rings with controlled expansion pressure
A piston ring formed from a plastics material and having a maximum pressure against the associated cylinder of between 0.10 and 1.50 MN/m2 and preferably 0.50 MN/m2. One possible material for such piston rings is polyetheretherketone...
12/16/1986
4421328Half-keystone compression ring
An improved half-keystone compression ring for use in an internal combustion engine. The improved ring's bottom side is essentially flat, radially and circumferentially, in the closed operating position....
12/20/1983
4331065Engine piston assembly with improved oil control
An engine piston and ring assembly providing improved oil control and where applicable sealing of scavenging air. In a preferred embodiment applicable to two-cycle port scavenged diesel engines and similar applications, the piston is provided with dual oi...
05/25/1982
4289264Uniform load piston ring
A piston ring which provides uniform circumferential pressure loading on the ring. The ring has two protrusions, and an optional third protrusion, which give full and uniform sealing contact between the ring, and a complementary peripheral groove in an as...
09/15/1981
4040637Low friction balanced piston ring
A low friction piston ring of split annular construction has a circumferentially extending recess formed at its upper outer portion to define an outer radial ledge which divides the outer axial surface of the ring into a recessed outer face and a reduced ...
08/09/1977
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