Low temperature disc brake
OwnerCharles J. MacKarvichinventor
Life of this patent
Estimating the term…
Abstract
The disc brake caliper (26) has a stainless steel drive element (62) that faces the brake fluid and an aluminum contact element (64) received in the drive element, protruding therefrom so as to engage and move the brake pad (38) into frictional engagement with the vented rotor (40).
Claims18
A disc brake assembly for engaging and decreasing the speed of rotation of a rotor of a wheel, including a caliper with an actuator housing, at least one brake pad mounted in said caliper for engaging the rotor, and an actuator positioned in the actuator housing for urging the brake pad into engagement with the rotor, comprising:
- said actuator comprising a piston assembly including a drive element and a contact element,
- said drive element defining a cup-shaped recess with a side wall having a cylindrical interior surface and opposed ends, with a base wall closing one of said ends and an opening at the other of said ends, with said opening facing said brake pad,
- said contact element having a cylindrically shaped exterior surface received through said opening of said drive element into said recess and extending from said base wall and along said cup shaped recess toward engagement with the brake pad,
- said contact element consisting essentially of aluminum for engaging the brake pad, and
- said drive element consisting essentially of steel and configured for urging said contact element toward engagement with the brake pad.
A disc brake assembly for engaging and decreasing the speed of rotation of a rotor, including a caliper with an actuator housing for mounting about a rotor and an actuator positioned in said actuator housing for urging a brake pad into engagement with the rotor,
- said actuator including a drive element reciprocally positioned in said actuator housing and including a recess therein defined by a side wall and a base wall with said recess facing said brake pad,
- an open ended contact element extending along said side wall of said drive element and having one open end seated against the base wall of said recess for movement in unison with said actuator and in heat exchanging engagement with said recess,
- the other open end of said contact element protruding from within said recess of said drive element toward the brake pad and movable with said drive element for engagement with the brake pad,
- said contact element being formed of material having a first rate of heat transfer and said drive element being formed of a material having a second rate of heat transfer that is lower than said first rate of heat transfer.
A disc brake assembly for engaging and decreasing the speed of rotation of a rotor, including a caliper with an actuator housing for mounting about a rotor and an actuator positioned in said actuator housing for urging brake pads into engagement with the rotor,
- said brake pads including a pad for engaging a rotor and a steel backing plate superposed said pad,
- said actuator having a drive element and a contact element,
- said contact element formed of a material of greater heat transfer capacity than said backing plate,
- said drive element is cup-shaped with a cylindrical wall and a bottom wall,
- said contact element is an open-ended tubular shape with an annular side wall press fitted into said cup shape of said drive element and an open end for engagement with the steel backing plate of said brake pad.
The disc brake assembly of 16, wherein said contact element and said drive element have facing surfaces that are in snug contact with each other.
A disc brake assembly for engaging and decreasing the speed of rotation of a rotor of a wheel, including
- a caliper with an actuator housing,
- at least one brake pad mounted in said caliper for engaging the rotor,
- an actuator positioned in the actuator housing for urging the brake pad into engagement with the rotor,
- said actuator comprising a piston assembly including drive element including a side wall and a bottom wall defining a recess facing said brake pad, and a contact element received in said recess and in conductive heat exchange relationship with said side wall and said bottom wall of said drive element and extending from said recess toward engagement with the brake pad,
- said contact element consisting essentially of aluminum for engaging the brake pad,
- said drive element consisting essentially of steel and configured for urging said contact element toward engagement with the brake pad, and
- said contact element is cylindrical and open ended.
Dependencies are inferred from the claim text.