A gasket and a sealing structure that are capable of stabilizing posture of the gasket installed in a narrow space. A gasket main body has: an annular lip portion pressed by a facing surface of a second member facing a first member so that the lip portion is in close contact with the facing surface while being bent inward; a first annular protrusion in close contact with an end surface of the mount portion facing the second member; and a second annular protrusion provided inward with respect to the first annular protrusion and in close contact with the end surface.

A functional element is provided which comprises a functional layer with at least one filter portion, a covering part on each side of the functional layer, at least one fluid passage in the functional element which passes through a passage area of the at least one filter portion, and a sealing segment which surrounds the passage area in a circumferentially closed manner with sealing material of the sealing segment permeating the filter portion to provide a seal in the filter portion and between the covering parts and the filter portion.

A piston ring for an internal-combustion engine may include a body having a substantially annular external surface and a physical vapor deposition coating layer disposed on the external surface. The body may include a gap defined between a first end and a second end. The piston ring may also include a first half in a region of the gap and a second half opposite the first half. The coating layer of the first half may have a thickness gradient, and the coating layer may define a greater thickness in a vicinity of the first end and the second end and a reduced thickness in regions further away from the vicinity of the first end and the second end. The coating layer of the second half may have a uniform thickness.

A piston ring for an internal-combustion engine may include a body having a substantially annular external surface and a physical vapor deposition coating layer disposed on the external surface. The body may include a gap defined between a first end and a second end. The piston ring may also include a first half in a region of the gap and a second half opposite the first half. The coating layer of the first half may have a thickness gradient, and the coating layer may define a greater thickness in a vicinity of the first end and the second end and a reduced thickness in regions further away from the vicinity of the first end and the second end. The coating layer of the second half may have a uniform thickness.

A gasket includes a reinforcing body made of a resin film, a one-side gasket body on one surface of the reinforcing body, and another-side gasket body on another surface of the reinforcing body. The reinforcing body has, between both gasket bodies, a three-dimensional shape in which the resin film is bent. The one-side gasket body includes an inversely-tapered engaging convex portion protruding toward the other-side gasket body, the reinforcing body includes a deformation portion as the three-dimensional shape deforming along a shape of the engaging convex portion, and the other-side gasket body includes an inversely-tapered engaging concave portion embedding therein the engaging convex portion and the deformation portion. At least one of the one-side gasket body and the other-side gasket body includes a flat surface-shaped seal surface, and the reinforcing body has a convex shape as the three-dimensional shape protruding toward the flat surface-shaped seal surface.

A sealing ring assembly for connection of an exhaust gas cooler to a coolant line may include a carrier ring composed of a plastic, a sealing ring composed of a sealing material connected to the carrier ring; and a heat protection element connected to the carrier ring and surrounding the carrier ring on a radial outer side defining an air gap therebetween.

A gasket for a combustion chamber is provided. The gasket comprises an upper assembly including an upper combustion sealing section with a raised bead positioned between a first component and a second component adjacent to a combustion chamber and an upper fluid sealing section positioned between the first component and the second component at a location spaced away from the combustion chamber. The upper combustion sealing section includes an anti-fret coating on a metal layer, the upper fluid sealing section includes a synthetic rubber coating on a metal layer, and the upper combustion sealing section is greater in thickness than the upper fluid sealing section.

A seal structure has one metal gasket arranged between a pair of casings. The metal gasket is provided with a planate outer peripheral portion and a bead portion which is formed by rising up from an inner peripheral end portion of the outer peripheral portion, and is arranged so that the bead portion comes into contact with the one casing, and the outer peripheral portion comes into contact with the other casing. The bead portion elastically deforms so as to reduce its height and the outer peripheral portion elastically deforms on the basis of the elastic deformation of the bead portion, when the metal gasket is pinched by the pair of casings, and a leading end of the outer peripheral portion comes into contact with one casing at this time, whereby any gap in which salt water stays is not formed between one casing and the metal gasket.

A sealing assembly includes a first component having a first sealing surface, a second component having a second sealing surface and a flat gasket arranged in the space between the first sealing surface and the second sealing surface, wherein the gasket has a through-opening for a third component arranged at least partially in the first component and/or the second component and at least engaging in the through-opening. The flat gasket has retaining means for securing the third component, the retaining means releasing the third component in a release position of said flat gasket and fixing said third component in at least one direction with respect to the first component and/or the second component in a retaining position of the gasket.

A flat gasket has a functional layer with at least one media through-opening and at least one combustion chamber through-opening. A second layer, which is separate from the functional layer. The second layer has a media through-opening that corresponds to the media through-opening in the functional layer and a combustion chamber through-opening that corresponds to the combustion chamber through-opening in the functional layer. The functional layer has at least one combustion chamber sealing bead, which is preferably a full bead, for each combustion chamber through-opening. The second layer has an outer boundary sealing bead and an elastomer sealing profile for each media through-opening.