Patent ID: 6986410
Filing Date: 2006-01-17
Classification: B62L,F16D

Abstract:
1. A brake caliper, comprising: a housing; a rotor slot, the rotor slot disposed within the housing, the rotor slot having an inner side and an outer side, the inner side being parallel to the outer side; a first hydraulic system, the first hydraulic system comprising a first hollow cylinder, a first piston, a first seal, a second hollow cylinder, a second piston, a second seal, at least a first internal passage, and at least a first port; the first hollow cylinder penetrating the housing, a first end of the first hollow cylinder forming an opening in the inner side, a second end of the first hollow cylinder disposed within the housing, the first piston slideably disposed within the first hollow cylinder and capable of protruding through the first end of the first hollow cylinder into the rotor slot, the first seal forming a hydraulic seal between the first hollow cylinder and the circumference of the first piston; the second hollow cylinder penetrating the housing, a first end of the second hollow cylinder forming an opening in the outer side, a second end of the second hollow cylinder disposed within the housing, the second hollow cylinder having the same diameter as and being axially aligned with the first hollow cylinder, the common axis of the first hollow cylinder and the second hollow cylinder being normal to the planes of the inner side and the outer side; the second piston slideably disposed within the second hollow cylinder and capable of protruding through the first end of the second hollow cylinder into the rotor slot, the second piston having the same diameter as the first piston; the second seal forming a hydraulic seal between the second hollow cylinder and the circumference of the second piston; a first brake pad, the first brake pad positioned to be urged into the rotor slot by the first piston, means for moveably positioning the first brake pad; a second brake pad, the second brake pad positioned to be urged into the rotor slot by the second piston, means for moveably positioning the second brake pad; the first internal passage being capable of transmitting hydraulic fluid between the first hollow cylinder and the second hollow cylinder, the first internal passage hydraulically connected to the first hollow cylinder at at least one point from the first seal to the second end of the first hollow cylinder, the first internal passage hydraulically connected to the second hollow cylinder at at least one point from the second seal to the second end of the second hollow cylinder; the first port operable to connect to a source of hydraulic pressure and to transmit hydraulic pressure to the first hydraulic system; a second hydraulic system, the second hydraulic system hydraulically isolated from the first hydraulic system, the second hydraulic system comprising a third hollow cylinder, a third piston, a third seal, a fourth hollow cylinder, a fourth piston, a fourth seal, at least a second internal passage, and at least a second port, the first hollow cylinder having a larger diameter than the third hollow cylinder; the third hollow cylinder penetrating the housing, a first end of the third hollow cylinder forming an opening in the inner side, a second end of the third hollow cylinder disposed within the housing, the third piston slideably disposed within the third hollow cylinder and capable of protruding through the first end of the third hollow cylinder into the rotor slot, the third seal forming a hydraulic seal between the third hollow cylinder and the circumference of the third piston; the fourth hollow cylinder penetrating the housing, a first end of the fourth hollow cylinder forming an opening in the outer side, a second end of the fourth hollow cylinder disposed within the housing, the fourth hollow cylinder having the same diameter as and being axially aligned with the third hollow cylinder, the common axis of the third hollow cylinder and the fourth hollow cylinder being normal to the planes of the inner side and the outer side; the fourth piston slideably disposed within the fourth hollow cylinder and capable of protruding through the first end of the fourth hollow cylinder into the rotor slot, the fourth piston having the same diameter as the third piston; the fourth seal forming a hydraulic seal between the fourth hollow cylinder and the circumference of the fourth piston; a third brake pad, the third brake pad positioned to be urged into the rotor slot by the third piston, means for moveably positioning the third brake pad; a fourth brake pad, the fourth brake pad positioned to be urged into the rotor slot by the fourth piston, means for moveably positioning the fourth brake pad; the second internal passage being capable of transmitting hydraulic fluid between the third hollow cylinder and the fourth hollow cylinder, the second internal passage hydraulically connected to the third hollow cylinder at at least one point from the third seal to the second end of the third hollow cylinder, the second internal passage hydraulically connected to the fourth hollow cylinder at at least one point from the fourth seal to the second end of the fourth hollow cylinder; and the second port operable to connect to a source of hydraulic pressure and to transmit hydraulic pressure to the second hydraulic system.