Nsk-warner K.k.

Toyota Jidosha Kabushiki Kaisha

Hideki Tatewaki

Masaki Sakai

Atsushi Suzuki

Masataka Kawabata

Katsumi Takezawa

The present invention provides a wet type friction material comprising a paper base material and binder, in which the paper base material includes silica having an average particle diameter of 1 to 10 &#x3bc;m and disc-shaped diatom earth, and the binder comprises a cured substance of liquid resin composition material obtained by mixing resol type phenol resin with silicone resin, where a weight ratio between non-volatile components of the resol type phenol resin and the silicone resin is adjusted to a range of 95/5 to 85/15.

Wet type friction material

The present invention provides a wet type multi-plate friction engaging apparatus in which axially shiftable outer tooth plates provided on an inner peripheral surface of a drum, and inner tooth plates disposed within the drum and spline-connected to an outer peripheral surface of a hub having lubricating oil supply holes open to the outer surface of the hub are arranged coaxially and alternately, so that the outer tooth plates and the inner tooth plates can be frictionally engaged with each other between a piston disposed at a closed end of the drum and a flange disposed at an open end of the drum by an urging force of the piston, and wherein the drum is not rotated or rotated at a low speed, and friction material are adhered to only the outer tooth plates or the outer tooth plates and the flange.

Growing community of inventors

Shizuoka-ken, Japan

Hideki Tatewaki