Shimano Inc.

Other

Tsuyoshi Sakashita

Masanori Sugimoto

Kazuhisa Yamashita

Kanji Kirimoto

Masashi Nagano

Daisuke Nago

Yasutaka Okada

Yuji Nakashima

Shinji Tsuge

Takaaki Matsuda

A bicycle cable disc brake is provided with a cam assembly that has improved efficiency during movement under high pressure. Basically, the cable disc brake has a cable housing, a pair of friction members and an actuated mechanism. The first friction member is movably coupled to the caliper housing between a release position and a braking position. The second caliper is also coupled to the caliper housing and arranged substantially parallel to the first friction member to form a rotor receiving slot therebetween. The actuated mechanism is movably coupled to the caliper housing to move the first friction member from the release position towards the second friction member to the braking position. The actuated mechanism has a pair of cam members movably arranged between an axially retracted position and an axially extended position with a guide member interconnecting the cam members during movement between the axial retracted position and the axially extended position. In the preferred embodiment, the guide member is a guide pin that extends from one of the cam members and is received in a bore of the other cam member.

Cable disc brake

Stainless steel for a disc brake rotor

A brake lever arm is mounted to a base member, with the base member fixed to a bicycle handlebar. The lever arm is pivotal about a pivot point on the base. The lever arm includes an adjusting mechanism that is slidable in grooves formed on the lever arm such that the adjusting mechanism may be selectively moved to a plurality of positions located at differing distances away from the pivot point. An adjusting screw extends through a portion of the base and, in one embodiment, contacts a portion of the adjusting mechanism. In another embodiment, the adjusting screw contacts a portion of the lever arm. Movement of the adjusting screw allows for positioning of the lever arm to define a brake dis-engagement position. The adjusting mechanism includes a contact member that is contactable with a brake cable connected to the lever arm. Depending on the adjustment of the adjusting screw and the adjusting mechanism, when the lever arm is located in the brake dis-engagement position, the cable does not contact the contact member. The cable contacts the contact member as the lever arm is moved from the brake dis-engagement position to a brake engagement position. The position of the contact arm with respect to the pivot point determines the amount of leverage of the lever arm effects on the cable.

Brake lever stroke adjusting mechanism

A brake operating device includes a bracket for attachment to the bicycle, an operating lever pivotally supported on the bracket about a pivot point, and a guide having a path that extends toward the pivot point. An anchoring member is connected to the force transmission element and is disposed for movement along the path of the guide during operation of the operating lever. An adjustment mechanism is provided for adjusting a range of movement of the anchoring member along path of the guide.

Bicycle brake operating device

A brake unit for a bicycle pivotably attached to brake brackets each having a support shaft (12a) projecting sideways and a radial seat surface formed in a proximal region of the support shaft. The brake unit comprises brake calipers (4) each including a boss (4a) having a boss bore for receiving the support shaft, a first end surface (4b) extending radially, and a second end surface (4c) disposed axially opposite from the first end surface. Each brake caliper is secured to the support shaft by a stud bolt (14) having a contact surface (15a) extending radially. A bush (13) is mounted between an inner peripheral surface of the boss bore and an outer peripheral surface of the support shaft. The first end surface of the brake caliper and the radial seat surface inhibit the brake caliper from moving in one axial direction. The contact surface of the stud bolt and the second end surface inhibit the brake caliper from moving in the other axial direction.

Brake unit for a bicycle

A brake caliper support structure has a stationary member fixed to a bicycle frame, a support shaft fixed to the stationary member, a brake caliper pivotably supported by the support shaft, a spring having one end thereof engaged with the brake caliper, and an elasticity adjusting device disposed between the brake caliper and spring for adjusting elasticity of the spring. The elasticity adjusting device includes an engaging member and an adjusting screw. The engaging member is rotatable about the support shaft. This support structure further includes a shoulder and a groove formed on the support shaft for restricting displacement of the engaging member on the support shaft.

Growing community of inventors

Osaka, Japan

Tsuyoshi Sakashita