US 9,068,654 B2Granted

Gasket

AssigneeNichias Corporation

InventorsTakahiro Niwa, Hironobu Imanaka, Takeshi Murata, Manabu Yasuda

Life of this patent

Estimating the term…

Loading patent…

Abstract

A gasket held between opposite flange joint surfaces with a bolt includes a combination of a complex material with a rubber material formed on one or both sides of a steel plate, the complex material having a convex or waveform bead, and a circular metal plate arranged at a bolt portion with a through-hole where a shank of the bolt penetrates and a bearing corresponding portion that corresponds to a bearing of the bolt around the through-hole. The gasket is configured to have the thickness (H3) of the bead provided to the complex material greater than the thickness (H2) of the circular metal plate that is equal to or greater than the thickness (H1) of the complex material. This structure provides a gasket indicating good sealing properties under such circumstances that a flange has low stiffness, a tightening load is reduced, and the distance between bolts is expanded.

Claims8

Dependent claims

A gasket that is held between opposite flange joint surfaces with a bolt, the gasket comprising a combination of:

a complex material with a rubber material formed on one or both sides of a steel plate, the complex material having a bead, wherein the bead includes the steel plate and the rubber material, and
a circular metal plate arranged at a bolt portion with a through-hole where a shank of the bolt penetrates and a bearing corresponding portion that corresponds to a bearing of the bolt around the through-hole;
wherein
the complex material includes a metal plate overlapping portion that is overlapped with the circular metal plate,
the circular metal plate includes a complex material overlapping portion, which is formed away from the through-hole of the circular metal plate, and which is overlapped with the complex material extended from the bearing corresponding portion, and
the complex material overlapping portion overlaps with the metal plate overlapping portion and the complex material overlapping portion and the metal plate overlapping portion are joined with each other only at a joint located away from the through-hole of the circular metal plate so that the complex material overlapping portion and the metal plate overlapping portion are joined on the outside of the flange joint surface.

3 more elements

Dependencies are inferred from the claim text.