Abstract: A positioning pin of the invention is attached to an engine part for installing a gasket thereon. The positioning pin includes a body having a projection extending outwardly from the engine part. The projection includes at least one large diameter portion, and a small diameter portion about the body. When the gasket is accidentally moved on the engine part to slip out of the positioning pin, the gasket engages the small diameter portion or is blocked by the large diameter portion to prevent accidental disengagement of the gasket from the engine part.

Abstract: A gasket of the present invention is formed of at least one main plate having at least one opening to be sealed. At least one hard coating is formed around the opening of the main plate to have a predetermined lateral width. On an surface of the main plate with the hard coating, a soft coating is formed. The hard coating provides surface pressure when the gasket is tightened, and the soft coating tightly seals around the opening.

Abstract: A steel laminate gasket of the invention is installed in an internal combustion engine having at least one hole to be sealed. The gasket comprises first and second plates, at least one middle plate situated between the first and second plates, and a cover member situated outside the hole of the engine to surround the same. A ring member is situated adjacent to the cover member. At least one protecting plate is placed over the ring member and at least a part of the middle plate. The protecting plate is made of a material harder than the ring member. Therefore, when the gasket is tightened, the gasket and the engine blocks do not deform, and wide and strong sealing pressure is obtained.

Abstract: A positioning pin of the invention is attached to an engine part for installing a gasket thereon. The positioning pin includes a body, and at least one groove around an upper portion of the body. When the gasket is accidentally moved on the engine part or slips out of the positioning pin, the gasket engages the groove to prevent accidental disengagement of the gasket from the engine part.

Abstract: A steel laminate gasket of the invention is designed to be installed in an internal combustion engine having at least one hole to be sealed. The gasket comprises first and third plates having beads around the hole, and a second plate situated between the first and third plates. The second plate does not extend adjacent to the hole. When the gasket is assembled, edge portions of the first and third plates directly face against each other, but the second plate terminates at a portion between or outside the beads. The gasket may provide moderate surface pressure at a portion slightly away from the hole to be sealed to prevent deformation of the engine parts. High surface pressure may be formed near the hole to be sealed.

Abstract: A steel laminate gasket of the invention is installed in an internal combustion engine having at least one cylinder hole and at least one through hole. The gasket comprises a first plate, a second plate situated under the first plate and a third plate situated between the first and second plates. A first sealing device is formed on at least one of the first and second plates to seal around the cylinder hole of the engine. Also, a second sealing device is formed on at least one of the first, second and third plates to seal around the through hole. The third plate includes sealing layers on both sides thereof, and a hole so that the first sealing device is located therein when the gasket is assembled. Leakage around the cylinder hole and through hole is effectively prevented.

Abstract: A steel laminate gasket of the invention is installed in an internal combustion engine. The gasket basically comprises a first plate, a third plate, and a second plate situated between the first and third plates. The first plate includes a base portion extending substantially the entire area of the gasket and located adjacent to the second plate. The first plate further includes a curved portion to define a hole of the engine, and a flange at the side of the base portion. A side wall is formed on the base portion or the flange spaced from the curved portion, so that an embossed portion is defined by the side wall and the curved portion. The third plate includes a flat solid portion situated under the embossed portion. When the gasket is tightened, the solid portion receives and supports tightening pressure to seal around the hole, and the side wall forms a secondary seal therearound.

Abstract: A steel laminate gasket of the invention is used for an internal combustion engine having at least one cylinder hole and at least one through hole therein. The gasket comprises a first plate, a second plate situated under the first plate, and a third plate situated between the first and second plates. In order to seal around the cylinder hole, the gasket is provided with a first device, a second device for covering at least the first device, and a third device formed on at least one of the first, second and third plates and situated outside the second device. The first and second devices form solid portion around the cylinder hole, and the third device resiliently seal around the cylinder hole. A fourth device may be formed around the through hole to seal the same.

Abstract: A steel laminate gasket is used for an internal combustion engine having at least one hole therein. The gasket comprises a main plate, and at least one pressure regulation plate. The main plate includes a base section having at least one first opening corresponding to the hole of the engine, a flange situated over the base section around the first opening, and a curved portion situated between the flange and the base section adjacent to the first opening. The curved portion has resiliency to seal around the first opening when the gasket is tightened. The base section, flange and curved portion are integrally formed together. The pressure regulation plate is placed over the base section and includes at least one second opening. The diameter of the second opening is larger than the diameter of the flange so that the pressure regulation plate can be directly placed over the base section without laying over the flange.

Abstract: A steel laminate gasket of the invention is situated for an internal combustion engine having at least one hole therein. The gasket comprises a first plate having at least one first hole corresponding to the hole of the engine and at least one first bead situated around the first hole, a second plate situated under the first plate, and a support device. The size of the support device is smaller than that of the first bead. The support device is situated beneath the first bead so that when the gasket is tightened, the support device abuts against and supports the first bead. As a result, the gasket can provide strong, even and wide sealing pressure.

Abstract: A metal plate of the present invention includes at least one bead having a bead body and a bead end portion terminating in the middle of the plate. The bead end portion has curved edges connected to edges of the bead body. The distance between the curved edges of the bead end portion increases as the distance from an end of the bead body increases. Also, the height of the bead end portion gradually decreases as it approaches edges thereof. The metal plate may be used as a gasket or may be combined with other metal plates to constitute a steel laminate gasket.

Abstract: In the present invention, a metal plate is used as a cylinder head gasket. The metal plate is provided with at least one dividing area between adjacent two cylinder holes, and at least one reinforcing bead situated in the dividing area to extend along the longitudinal direction thereof. The reinforcing bead operates to strengthen the dividing area and to seal thereat. The metal plate may be incorporated with other plates to constitute a steel laminate gasket.

Abstract: A steel laminate gasket of the invention is installed in an internal combustion engine having at least one hole therein. The gasket comprises a first plate and a second plate situated under the first plate. The first plate includes at least one first hole corresponding to the hole of the engine, a base portion, at least one curved portion and at least one flange situated above the base portion. The curved portion and flange are integrally formed with the base portion. A side wall is formed on one of the base portion and the flange to form an embossed portion thereat. Also, a bead is formed on the embossed portion to thereby provide a sealing pressure stronger than the embossed portion when the gasket is tightened.

Abstract: A steel laminate gasket of the invention is installed in an internal combustion engine. The gasket comprises a first plate and a second plate situated above the first plate. The first plate includes a base portion extending throughout the entire area of the gasket, a curved portion to define a first hole, and a flange situated above the base portion. A bead is formed on the flange to extend toward the base portion. When the gasket is tightened, the flange extends freely outwardly, so that the first bead can deform at a relatively low pressure. Also, the flange can slide easily relative to the cylinder head or cylinder block.

Abstract: A steel laminate gasket of the invention is situated for an internal combustion engine having at least one hole therein. The gasket comprises a first plate having at least one first hole corresponding to the hole of the engine and at least one first bead situated around the first hole, a second plate situated under the first plate, and a support device. The size of the support device is smaller than that of the first bead. The support device is situated beneath the first bead so that when the gasket is tightened, the support device abuts against and supports the first bead. As a result, the gasket can provide strong, even and wide sealing pressure.

Abstract: A steel laminate gasket of the invention is installed in an internal combustion engine having at least one hole therein. The gasket comprises a first plate having at least one first hole therein corresponding to the hole of the engine, and a second plate having at least one second hole. The first plate is provided with a base portion, at least one curved portion adjacent the first hole, and at least one flange situated parallel to the base portion. The base portion, curved portion and flange are integrally formed together. At least one side wall is formed on one of the base portion and the flange adjacent the curved portion to surround the first hole. The thickness between the flange and base portion inside the side wall is greater than the thickness between the flange and base portion outside the side wall so that an embossed portion is formed around the first hole. The second plate is situated adjacent the first plate so that the second plate does not pile the flange of the first plate.

Abstract: A steel laminate gasket of the invention is used for an internal combustion engine having at least one cylinder hole and through hole therein. The gasket comprises a first plate, a second plate and at least one third plate situated between the first and second plates. The first plate is provided with a first sealing device formed around the hole corresponding to the cylinder hole of the engine. The third plate is provided with a hole, the diameter of which is larger than that of the diameter of the first sealing device so that the first sealing device is located inside the hole of the third plate when assembled, and sealing layers formed on both sides of the third plate. The gasket further includes a second device for at least covering the first sealing device, and a third sealing device formed on at least one of the first, second and third plates for sealing around the through hole. Leakage around the cylinder hole and through hole is effectively prevented.

Abstract: A steel laminate gasket of the invention is situated for an internal combustion engine having at least one hole therein. The gasket comprises a first plate having at least one first hole corresponding to the hole of the engine and at least one first bead situated around the first hole, a second plate situated under the first plate, and a support device. The size of the support device is smaller than that of the first bead. The support device is situated beneath the first bead so that when the gasket is tightened, the support device abuts against and supports the first bead. As a result, the gasket can provide strong, even and wide sealing pressure.

Abstract: A steel laminate gasket comprises a first plate having at least one first hole, a second plate situated adjacent to the first plate, and at least one depression formed either on the first plate or the second plate and extending toward the other. The second plate is provided with at least one second hole and a bead extending around the second hole. The bead extends substantially perpendicularly to a horizontal plate of the second plate toward the first plate to abut against the first plate. Height of the depression is substantially the same as or slightly less than that of the bead so that when the first and second plates are connected together by a spot welding at the depression, the first and second plates are maintained substantially parallel to each other.

Abstract: A steel laminate gasket of the invention is used for an internal combustion engine having at least one hole therein. The gasket comprises a first plate having at least one first hole and a first bead situated adjacent to the first hole to surround the same, and a second plate situated adjacent to the first plate. The second plate is provided with at least one second hole, at least one second bead situated adjacent to the second hole to surround the same, and at least one third bead situated at a predetermined distance away from the second bead. When the first and second plates are assembled together, the first bead faces against the second plate, and second and third beads face against the first plate, wherein the first bead is located between the second and third beads. When the gasket is tightened, the first, second and third beads form a plurality of corrugated beads at selected areas around the hole to securely and widely seal the same.