Class / Patent application number | Description | Number of patent applications / Date published |
277436000 | Piston ring having peripheral radially sealing flexible projection (e.g., piston cup, etc.) | 16 |
20080246225 | Piston Pump - A piston pump for the hydraulic energy supply in a motor vehicle, comprising a piston that is movably arranged in a stepped bore of an accommodating member that is provided with a closure, the piston carries a seat for an elastic sealing element which accommodates the sealing element with axial play, and with radial elastic preload for the purpose of sealing between piston and cylinder. The seat for the sealing element has a structure which generates forces pointing radially towards a piston axis and expanding the sealing element in a radial direction, and that the structure produces an elastic deformation of the sealing element for an increased and dosed sealing contact pressure between piston and cylinder. | 10-09-2008 |
20090026711 | COMPRESSION PISTON RING - A generally circular compression piston ring having an outer peripheral surface, an inner peripheral surface, and a pair of end faces splitting the circular shape in a radial direction thereof for defining a gap portion. The ring has a first portion including a notched portion formed at the inner peripheral surface and extending over a predetermined circumferential length portion starting from the end face, and a second portion other than the first portion. The second portion has a radial thickness ranging from 2.0 mm to 6.0 mm. The notched portion is a plane shape gradually reaching the outer peripheral surface toward the end face. The end face has a radial thickness ranging from 0.2 times to less than 0.5 times as large as the radial thickness of the second portion. The outer peripheral surface defines a center serving as a center of a center angle, and the predetermined circumferential length portion is defined by the center angle ranging from 26.5 degrees to 14 degrees. | 01-29-2009 |
20100133757 | SEALING DEVICE - A sealing device in which a good lubricating oil film is formed along the entire circumference of a sliding surface. The sealing device ( | 06-03-2010 |
20100270751 | ANTI-ROLL RIBBED SEAL - The present invention provides a resilient, fluid-tight seal for shafts, pistons and the like having a plurality of radially oriented, spaced-apart ribs or webs extending between adjacent oblique circular flanges or features of a seal. The radially oriented ribs or webs provide added stiffness to the flanges or features to prevent them from rolling under during assembly procedures but do not increase the radial spring constant and thus do not appreciably increase the drag created by the seal on a shaft or piston. | 10-28-2010 |
20110074114 | GASKET, COVER WITH GASKET, AND PNEUMATIC CYLINDER WITH COVER AND GASKET - A gasket includes a damping buffer for a piston that can be charged with a pressure medium and that can be moved back and forth axially in a cylinder pipe and includes at least one static seal for sealing the cylinder pipe vis-à-vis a cover connected to the face of the cylinder pipe and a dynamic seal having at least one dynamically loaded sealing lip that, during the proper use of the gasket, can be laid against the surface to be sealed of a damping journal that is connected to and axially movable back and forth with the piston and that has at least one flow-guiding connection opening that connects the axial faces of the gasket. | 03-31-2011 |
20160091033 | PISTON-INTEGRATED SEAL - A piston-integrated seal has a seal lip integrally provided in a clutch piston of a hydraulic clutch and directed to a hydraulic chamber side. In the seal lip, a main seal edge portion in a hydraulic chamber side and a sub seal edge portion in an anti-hydraulic chamber side are formed in a sliding portion in relation to the other sliding surface. In the main seal edge portion and the sub seal edge portion, an angle of an inclined surface in the hydraulic chamber side is smaller than an angle of an inclined surface in the anti-hydraulic chamber side in a un-installed state, and the angle of the inclined surface in the hydraulic chamber side in relation to the other sliding surface is approximately equal to the angle of the inclined surface in the anti-hydraulic chamber side in an installed state, thereby reducing friction difference in a sliding direction. | 03-31-2016 |
20160131132 | Piston Seal and Pump Including Same - A seal for a piston of a positive displacement pump includes an annular seal element, a radially outer surface of the annular seal element defining a longitudinal axis, and an annular energizer disposed between the annular seal element and the longitudinal axis along a radial direction. The annular energizer has a resilience along the radial direction to bias the annular seal element away from the longitudinal axis along the radial direction, the radial direction being perpendicular to the longitudinal axis. The radially outer surface of the annular seal element defines at least one circumferential groove about the annular seal element, and a concavity of the at least one circumferential groove faces away from the longitudinal axis along the radial direction | 05-12-2016 |
20160146346 | GASKET INSERTION METHOD FOR MOUNTING GASKET INSIDE OUTER CYLINDER OF SYRINGE, AND GASKET FOR MOUNTING - A gasket insertion method for inserting a gasket into an outer cylinder includes providing an outer cylinder having a base end opening section; providing a gasket having a recessed section that is open at a base end of the gasket and that includes a flat bottom surface; pushing the gasket into a sleeve configured to be inserted into the outer cylinder, by relatively moving an inserter in a tip end direction with respect to the sleeve while a flat tip end surface of a tip end section of the inserter abuts the bottom surface of the recessed section; inserting the sleeve into the outer cylinder through the base end opening section; and arranging the gasket inside the outer cylinder by relatively moving the sleeve in a base end direction with respect to the outer cylinder while maintaining relative axial positions of the outer cylinder, the gasket, and the inserter. | 05-26-2016 |
277437000 | Having particular mounting, retaining, or supporting feature | 5 |
20090166978 | Cylinder/piston unit with at least three sealing elements - A cylinder/piston unit is disclosed for pre-fill, storage and release when desired of an active substance, such as a medicament. The cylinder/piston unit is provided with a cylinder and with a piston which is guided therein and which is sealed off in a sterile manner by a rubber seal, the cylinder and the piston enclosing a chamber that can be filled at least temporarily with active substance, and the cylinder having at least one discharge element at its front end. For this purpose, the piston resting in a rear position is sealed off relative to the cylinder in a sterile manner by a static front sealing element and by a static rear sealing element. Arranged spatially behind each static sealing element, there is a parking area for receiving the respective sealing element. When the piston is actuated, the individual static sealing elements are transferred from their respective sealing position into a parked position located in the parking area, and each sealing element in the parked position touches only the cylinder wall or only the piston wall. With the present invention, a cylinder/piston unit is developed which can be pre-filled and in which, despite a sterile sealing of the piston, only a slight force has to be applied in order to accelerate and/or move the piston. | 07-02-2009 |
20140361492 | SYSTEM, METHOD AND APPARATUS FOR SPRING-ENERGIZED DYNAMIC SEALING ASSEMBLY - A seal assembly is disclosed. The seal comprises a metal spring bonded to an elastomer body that is coupled to a polymer ring. The spring may comprise a cantilevered, overlapped metal strip. The elastomer and polymer mechanically interlock with radial members. The elastomer has contacting surfaces configured in outward extending radii to enhance forward edge loading and oil removal from the dynamic surface. In hydraulic service, the seal prevents the egress of hydraulic fluid and ingress of foreign particles. | 12-11-2014 |
20150021861 | ENGINE HAVING PISTON WITH L-SHAPED TIMING RING - An internal combustion engine is disclosed. The engine may have an engine block at least partially defining a cylinder, a liner disposed within the cylinder, and at least a first gas exchange port passing through an annular surface of the liner. The engine may also have a cylinder head connected to the engine block and together with the liner forming a combustion chamber, and at least a second gas exchange port disposed within the cylinder head in fluid communication with the combustion chamber. The engine may additionally have a piston slidably disposed within the liner and having an annular groove formed within an outer surface, and a plurality of piston rings selectively connectable with the annular groove. Each of the plurality of piston rings may be generally L-shaped and have a different axial length. Each of the plurality of piston rings is selected to vary an opening and closing timing of the at least a first gas exchange port. | 01-22-2015 |
20160076649 | OIL RING - An oil ring to be attached to a ring groove of a piston for an engine is provided. The oil ring includes two annular ring bodies having a common axis and arranged in tandem, and an expander for biasing the ring bodies radially outward. A sliding surface is formed at an outer circumference of each ring body to bulge radially outward and slides on a cylinder inner circumferential surface. The sliding surface of one of the ring bodies has a tip portion and first and second curved surfaces. In cross sections of the first and second curved surfaces, the first and second curved surfaces are connected while tangent lines to the cross sections at the tip portion align with each other, and when positional change rates are compared between points on the first and second curved surfaces, a change rate of the first curved surface is lower. | 03-17-2016 |
20160146347 | SEAL SET AND SEALING ARRANGEMENT COMPRISING AT LEAST ONE SEAL SET - The disclosure relates to a seal set, and to a sealing arrangement comprising a seal set. The seal set is arranged for sealing a primary side against a secondary side and comprises a main body which is arranged to be received at a support part, and a slide ring for contacting a slide surface of a slide partner part, wherein the main body is arranged in an annular fashion and comprises a radial circumferential receiving groove for the slide ring, wherein further a radial circumferential sealing lip is provided at the main body, which is formed between the receiving groove for the slide ring and a secondary-side end of the main body, wherein the sealing lip comprises a tip region and a conical ring surface adjoining the tip region, and wherein the slide ring, in a mounted state, at least sectionally covers the receiving groove, a primary-side adjoining surface adjoining the receiving groove, and the conical ring surface. | 05-26-2016 |
277438000 | Having C, U, or V cross-sectional profile | 3 |
20150292621 | SINGLE-PIECE OIL CONTROL RING - A single-piece oil control ring for a piston may include a body having at least one upper portion and at least one lower portion each facing towards a cylinder wall of an internal combustion engine. At least one of the upper portion and the lower portion may respectively define a first surface extending substantially perpendicular to the body and a receding second surface extending from the first surface substantially at an incline. The first surface may protrude towards the cylinder wall in relation to the second surface. The first surface may have a first area of contact with the cylinder wall, and at least 95% of the first area may contact the cylinder wall. | 10-15-2015 |
20160138714 | LOW TENSION PISTON RINGS AND METHOD FOR MANUFACTURING THE SAME - The invention provides a low tension piston ring having a finished outer diameter and negligible tangential tension. The method includes the steps of machining a stock bar to an initial outer diameter slightly greater than the finished outer diameter of the piston ring, finishing the initial outer diameter of the stock bar to a rounded profile having a nominal diameter equal to the finished outer diameter, and machining the stock bar to the preferred cross-section. Dykes-type piston rings can have keystone or semi-keystone shaped cross-sections. The method continues by detaching the piston ring from the stock bar using a parting tool in response to completing all tension inducing operations including the steps recited above. The method continues with the steps of lapping the piston ring to a final longitudinal thickness and cutting the piston ring longitudinally to form a final gap. | 05-19-2016 |
277439000 | Axially facing cup | 1 |
20150069716 | SEALING MEMBER FOR MASTER CYLINDER - Disclosed is a sealing member for a master cylinder. The sealing member for a master cylinder, which is formed in a ring shape and is installed between an inner surface of a cylinder body and an outer surface of a piston, includes an inner wing part configured to contact the outer surface of the piston, an outer wing part configured to contact the inner surface of the cylinder body, and a sealing rear wall part configured to connect the inner wing part and the outer wing part. The sealing rear wall part is provided with an oil passage to connect an oil entrance formed at the inner wing part and an oil entrance formed at the outer wing part, and the oil passage includes a retardation passage which is longer than a shortest straight-line distance which directly connects the oil entrances. | 03-12-2015 |