Nippon Gasket Company, Ltd.

Shimadzu Corporation

Nippon Thompson Co., Ltd.

Mizuno Corporation

Osaka Pharmaceutical Association

Kiyoshi Sugimoto

Kazuya Yoshijima

Tsuyoshi Hiramatsu

Takuya Watanabe

Hiroshi Uemura

Koji Sakai

Mototaka Iwata

Masahiko Miura

Haruhiko Miyagawa

Katsuhiro Nakagawa

Minoru Teranishi

Naoyuki Masuda

A monolayer metal gasket is disclosed, which may be kept against deformation around a bolt hole and further made stable in sealing stress around a gas hole between mating surfaces of confronting components. A first extra thickness around the gas hole is provided by turning back a part of a metallic sheet on a major flat of the metallic sheet, with leaving a space open between them to form a folded construction having elasticity. A second extra thickness around a bolt hole is a closely layered construction of nearly rigid body little to be deformed. When the monolayer metal gasket is squeezed between the mating surfaces of the confronting components, a clearance between the mating surfaces may be regulated to a preselected distance by virtue of the second extra thickness that is little to be deformed.

Monolayer metal gaskets

In a metallic gasket having a metallic sheet made with a recess surrounding around a diverse type of hole, in which an elastic sealing member is installed, a relation between the recess and the elastic sealing member in their cross sections and also configurations is so specified as to use the elastic sealing member within a range of elastic limit inherent in the elastic sealing member, thereby improving the sealing performance of the metallic gasket. The elastic sealing member is smaller than the recess in their cross section perpendicular to the major side of the metallic sheet. Thus, the elastic sealing member, when the metallic gasket is squeezed, may serve its useful function within the range of inherent elastic limit.

Metallic gasket

A gasket-squeeze construction wherein a warp-limiter member is installed in a bolt hole in which a fastening bolt fits. The warp-limiter member is made less in an amount of flex than confronting surfaces, between which the gasket is disposed and squeezed by the tightening of the fastening bolt. The warp-limiter member serves to make the sealing stress uniform around a combustion gas hole. The warp-limiter member installed in the bolt hole, because of tougher to flex than the confronting surfaces when tightening the fastening bolt, makes uniform the clamping force of the fastening bolt and the compressive stress created around the associated bolt hole, moreover dispersing uniformly the sealing stress throughout around the combustion gas hole such as a cylinder bore, thereby rendering variation in distortion in the sealing joint less to improve the sealing performance.

Gasket-squeeze construction

A metallic gasket installed between confronting surfaces of engine components is improved in heat conduction between the components so as to reduce the adverse thermal influence to the engine. The metallic gasket used between the confronting surfaces of, for example a cylinder head and a cylinder block is composed of an annular raised portion defining inside a gas hole in alignment with an associated cylinder bore, and a surrounding metallic sheet connected to the annular raised portion. Both the annular raised portion and the surrounding metallic sheet are made of aluminum material to render the heat conduction between the components efficient. Thus the improved gasket can reduce the adverse thermal influence such as thermal deformation, thermal stress, and so on, whether the components are made of different materials or same materials.

A metal gasket is described which has a structure with no beads so that the need for dies used for molding is eliminated, thereby facilitating the processing of the gasket and achieving good cost performance, and which is excellent in sealing ability. The metal gasket comprises (i) an elastic metal plate having a base and folded-back portions each of which is formed so as to create a clearance together with the base and disposed so as to extend around a bore hole and (ii) a metal plate which is thicker than the elastic metal plate and has lower level portions each of which is located at a position closed to each bore hole, and the elastic metal plate and the metal plate are laminated such that each folded-back portion of the elastic metal plate faces the lower level portion of the metal plate.

Metal gasket

A laminated gasket is provided, which ensures desired bore sealing surface pressures on the side of a cylinder head and on the side of a cylinder block, which is excellent in sealing ability and durability preferably by virtue of its double sealing function and which has a comparatively simple structure. This gasket has a core plate and elastic plates laminated to both surfaces of the core plate. The core plate has thin-walled portions each surrounding a bore opening and a thick-walled portion extending outwardly from each thin-walled portion. The elastic plates respectively have folded-back portions each of which is formed so as to create, together with a base portion, a clearance around its associated bore opening.

Laminated gasket

A metal wood club head of a hollow hull structure according to the present invention is such that the vertical difference between a maximum face part height (MFH) from a sole part ( ) and a back part height (BH) from the sole part ( ) is at least within 25 mm, the height of a crown part ( ) having a width of 30% to 70% of a head width from the sole part ( ) is substantially identical to the maximum face part height (MFH) or more than that, the vertical difference between a maximum crown part height (MCH) from the sole part ( ) and the maximum face part height (MFH) is at least within 8 mm, and the radius (R ) of curvature of the crown part ( ) is substantially uniformly within the range of 100 mm to 1000 mm, while it sets the radius (R ) of curvature of the sole part ( ) substantially uniformly within the range of 500 mm to 2000 mm, and sets the ratio of thicknesses of the crown part ( ) and the sole part ( ) within the range of 1.0 to 1.2.

Metal wood club head

A tubular insert with a small internal volume is disposed inside the vaporization chamber at the inlet of a capillary column of a gas chromatograph such that the sample with a solvent injected into the vaporization chamber is carried by a carrier gas through the insert into the column. The internal volume of the insert is such that the retention time of the carrier gas through the insert is less than 4 seconds. A heater is controlled to maintain the temperature inside the vaporization chamber within a specified range above the boiling point of the solvent as the sample is injected into the vaporization chamber, and this temperature is subsequently raised to a final temperature above the boiling points of the components to be analyzed. The carrier gas pressure is temporarily increased for better efficiency as the sample is injected.

Growing community of inventors

Osaka, Japan

Kiyoshi Sugimoto