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US 6,746,020 B2Granted
Metal gasket
AssigneesToyota Jidosha Kabushiki Kaisha, Nichias Corporation
InventorsYuichi Sumi, Katsunori Ueda, Kazuyoshi Urata
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AssigneesToyota Jidosha Kabushiki Kaisha, Nichias Corporation
InventorsYuichi Sumi, Katsunori Ueda, Kazuyoshi Urata
Estimating the term…
A metal gasket is designed so that mounting and removal from a cylinder block using a bolt is easy regardless of the direction of the attaching surface and there is no risk of moving or drop off. The gasket is made of two laminated metal base plates. At a base plate part near a bolt hole of one metal base plate, a bolt engaging piece projects so that the diameter of the bolt hole is smaller than the diameter of the bolt for fastening, and an assistant piece for handling is integrated thereto. At the base plate part of the other plate overlapping the assistant piece, a cut recess is formed. When inserting the bolt into the bolt hole of the metal gasket, the bolt engaging piece is struck against the bolt and is elastically bent, and allows the bolt to pass. The gasket mounted on the bolt is kept at the mounting position by the pressing action to the bolt from the impact resilience force of the bolt engaging piece. Furthermore, the metal gasket can easily be removed in such a way that the assistant piece is held with a fingertip or the like and the bolt engaging piece is separated from the screw part of the bolt. The recess of the metal base plate is useful for making the handling of the assistant piece easy.
A metal gasket comprising at least one metal base plate, said metal base plate including an aperture for receiving a bolt and a bolt engaging piece having a projecting end projecting into the aperture to contact a bolt, the projecting end of the bolt engaging piece extending into the aperture so that the diameter of the aperture is smaller than the outer diameter of a bolt to be positioned therethrough and greater than the inner diameter of a bolt to be positioned therethrough, said metal base plate including an assistant piece which is monolithic with said bolt engaging piece for enabling removal of said metal gasket from between an exhaust manifold and a cylinder head of an internal combustion engine, said assistant piece having an assistant piece end projecting outwardly from said metal base plate, said assistant piece end defining a portion of an outer edge of said metal base plate.
Dependencies are inferred from the claim text.