Honda Motor Co., Ltd.

Daikin Industries, Ltd.

Tetsuya Mizone

Kouhei Takemura

Tomihiko Yanagiguchi

Hidetaka Ogishi

Emiko Mogi

Takeshi Hotaka

Masashi Kitagawa

Shinya Notomi

Shinya Nagata

The present invention provides a vehicle engine oil seal having excellent sliding properties over the entire rotation range of engines from a low rotation range to a high rotation range. The present invention is a vehicle engine oil seal comprising: an elastic member with a seal lip portion having at least a main lip portion, wherein the elastic member is formed of a composition containing a fluororubber and a fluororesin and has projecting portions at least on a surface of the main lip portion, the projecting portions being substantially formed of the fluororesin contained in the composition, the fluororesin is a copolymer including a polymerization unit derived from ethylene and a polymerization unit derived from tetrafluoroethylene, and the fluororubber is a polymer including a polymerization unit derived from vinylidene fluoride.

Vehicle engine oil seal

The present invention provides a vehicle transmission having excellent sliding properties over the entire speed range of engines from a low speed range to a high speed range. The present invention is a vehicle transmission oil seal comprising: an elastic member with a seal lip portion having at least a main lip portion, wherein the elastic member is formed of a composition containing a fluororubber and a fluororesin and has projecting portions at least on a surface of the main lip portion, the projecting portions being substantially formed of the fluororesin contained in the composition, the fluororesin is a copolymer including a polymerization unit derived from ethylene and a polymerization unit derived from tetrafluoroethylene, and the fluororubber is a polymer including a polymerization unit derived from vinylidene fluoride.

Vehicle transmission oil seal

The present invention provides a vehicle valve stem seal having both durability and sliding properties at an extremely high level in addition to usual sealing performance. The present invention is a vehicle valve stem seal comprising an elastic member with a seal lip portion on an end of a valve stem guide, the seal lip portion slidably closely contacting with a valve stem of an engine, wherein the elastic member is formed of a composition containing a fluororubber and a fluororesin and has projecting portions at least on a surface of the seal lip portion, the projecting portions being substantially formed of the fluororesin contained in the composition, the fluororesin is a copolymer including a polymerization unit derived from ethylene and a polymerization unit derived from tetrafluoroethylene, and the fluororubber is a polymer including a polymerization unit derived from vinylidene fluoride.

Vehicle valve stem seal

There is provided a vehicle wheel which can reduce a rolling resistance by rising a tire temperature with a simple structure. A heat-insulation rubber is pasted on all circumference surface of a portion of an outer circumference surface of a rim other than a bead seating portion where a bead portion of a tire closely contacts and a rim flange portion. The heat-insulation rubber suppresses any heat transfer from air in a tire air chamber and from the internal surface of the tire to the rim at the outer circumference surface of the rim which contacts the air in the tire air chamber.

Vehicle wheel

The rubber composites for tire treads include silica; carbon black; and oil constituents, wherein a ratio (A index) of silica contents, carbon black contents, and oil constituents contents is represented by A index=silica contents/(carbon black contents+silica contents+oil constituents contents)&#x2267;0.8; and a ratio (B index) of a complex elastic modulus E* at 30&#xb0; C. and a loss tangent tan &#x3b4; at 60&#xb0; C. is represented by B index=E*/tan &#x3b4;&#x2267;120.

Rubber composites for tire treads and tire

There are provided the tire motorfor increasing or decreasing the tire rotational frequency Nt while the tireis being rotated around the tire rotational shaft, the rotational frequency measuring meansfor measuring the tire rotational frequency Nt, the drum motorfor rotating the test drumaround the drum rotational shaftat the constant drum speed Vd, the speed meterfor measuring the drum speed Vd, the load applying meansfor pushing the tireagainst the test drumwith the tire load Fz, the radial force load cellfor measuring the tire load Fz, the tangential force load cellfor measuring the tangential force Fx that is exerted on the tire, and the recording means for recording the measurement result of each of the drum speed Vd, the tire rotational frequency Nt, the tangential force Fx and the tire load Fz in association with every measurement time point during increasing or decreasing the tire rotational frequency.

Growing community of inventors

Wako, Japan

Tetsuya Mizone