Nsk-warner K.k.

Nsk-warner Kabushiki Kaisha

Toshiaki Wakisaka

Masaki Sakai

Yoshihisa Harada

Shigeki Umezawa

Hirofumi Nakagomi

Kazuyuki Fujita

A double-wrap band brake apparatus has a double-wrap brake band comprising an annular intermediate band a pair of annular outer bands. The brake apparatus is used to brake a rotating member fitted in the double-wrap brake band. A center deviation correcting member is provided for correcting a center deviation between the intermediate band and the outer bands.

Double-wrap brake band apparatus

A double-wrap band brake apparatus which has a double-wrap brake band comprising an annular intermediate band with a frictional surface formed on the inner periphery thereof, a pair of annular outer bands secured to the free end of the intermediate band in a state that the respective free ends of the outer bands oppose to each other and have frictional surfaces respectively formed on the inner peripheries thereof, an anchor bracket secured to the operating ends of the outer bands to be latched on the side of a main body casing, and an apply bracket secured to the operating end of the intermediate band for receiving a force in a direction in which the intermediate band and the outer bands are constricted from an actuator. The brake apparatus is used to brake a rotating member fitted in the double-wrap brake band. A center deviation correcting member for correcting a center deviation between the intermediate band and the outer bands is formed on at least one of the anchor bracket and the apply bracket.

In the brake drum, a plurality of grooves are formed on the slid surface thereof in such a manner that the grooves respectively extend in parallel to the sliding direction of the brake drum.

Brake drum with parallel grooves

A brake band formed by pressing a smooth hot plate or hot drum heated to a temperature of 350 to 550&deg; C. on a surface of the frictional material made of a fiber component, a filler, a friction adjustment agent and a thermosetting resin on a strap for 1 to 5 seconds before or after the frictional material is fixed.

Brake band having an improved initial friction coefficient

In a brake band mounted on a transmission for a vehicle which is provided with a strap having opposite end portions and twined around the outer periphery of a drum, an apply side end portion provided on one end portion of the strap, and an anchor side end portion provided on the other end portion of the strap, at least one of the apply side and anchor side end portion of the brake band is supported or fixed so as to have a predetermined gap with respect to the outer peripheral surface of the drum during non-tightening of the brake band.

Brake band

A lining for a brake band wherein brackets of the same shape or different shapes are connected respectively to opposite ends of a curved thin strap having an adhesive thereon, and a thin wet lining is bonded to an inner side of the curved strap, characterized in that cavities containing lubricating oil are formed in the lining.

Lining for brake band

A brake band suitable for use in an automatic transmission is described. The brake band has a brake lining with a surface subjected beforehand to working on an apply side thereof and having a percent contact area in a range of 10-40%, preferably 25-40% on the apply side thereof at the time of commencement of use.

Growing community of inventors

Shizuoka, Japan

Toshiaki Wakisaka