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US 9,168,974 B2Granted
Cable-actuated disc brake for a bicycle
OwnerJonathan K. Harrisinventor
Life of this patent
Estimating the term…
Abstract
The invention relates to a cable-actuated disc brake for a bicycle. The cable-actuated disc brake has a lever with dual, opposing piston assemblies that limit the movement of brake pads in relation to a brake disc of the bicycle. The lever includes symmetrical lever arms respectively engaged with symmetrical piston assemblies that are axially spaced, coaxially aligned and rotate about a pivot axis to selectively engage brake pads with a brake disc of the bicycle.
Claims21
A cable-actuated disc brake for a bicycle, said disc brake comprising:
- a caliper body configured to be attached to a fork of said bicycle;
- said caliper body comprising a brake pad channel;
- said caliper body further comprising a pair of polygonal receptacles separated by said brake pad channel;
- a lever comprising a first end having symmetrical lever arms and a second end having a brake cable attachment mechanism;
- said lever pivotable about a pivot axis;
- and
- a pair of symmetric piston assemblies connected to said lever arms of said lever;
- said piston assemblies axially aligned and coaxially spaced about said brake pad channel of said caliper body;
- each of said piston assemblies further comprising an outer armature body and an inner armature body;
- each of said inner armature bodies having a polygonal peripheral configuration respectively positioned within and engaged with said polygonal receptacles of said caliper body;
- each of said outer armature bodies having a series of tapered ridges and terminal shoulders;
- each of said inner armature bodies having a series of tapered ridges and terminal shoulders that mate with said tapered ridges and terminal shoulders of said outer armature bodies;
- each of said piston assemblies pivotable about said pivot axis;
- each of said piston assemblies in contact with a disc brake pad positioned within said brake pad channel of said caliper body;
- wherein said piston assemblies transform rotary motion of said lever to linear motion of said brake pads.
12 more elements
A cable-actuated disc brake for a bicycle, said disc brake comprising:
- a caliper body attachable to a fork of said bicycle, said caliper body comprising a brake pad channel having a pair of disc brake pads positioned therein;
- a return spring positioned intermediate of and in connection with said brake pads for biasing said brake pads toward a neutral position;
- a lever comprising a first end having symmetrical lever arms with splined apertures therein, and a second end having a brake cable attachment mechanism;
- said lever pivotable about a pivot axis;
- an inboard piston assembly and an outboard piston assembly;
- said inboard piston assembly being a mirror image of said outboard piston assembly, each of said piston assemblies connected to said lever arms of said lever;
- said piston assemblies axially aligned and coaxially spaced about said brake pad channel of said caliper body;
- each of said piston assemblies pivotable about said pivot axis;
- each of said piston assemblies in contact with one of said disc brake pads positioned within said brake pad channel of said caliper body;
- each of said piston assemblies further comprising a spring armature connected said lever arms of said lever, respectively, and a cam in contact with said brake pads, respectively;
- each of said spring armatures further comprising:
- an outer armature body and an inner armature body with a biasing spring intermediate thereof;
- each of said outer armature bodies having a splined head connected to said splined aperture in said first end of said lever;
- each of said outer armature bodies having a series of tapered ridges and terminal shoulders;
- each of said ridges and shoulders having a channel therein;
- each of said inner armature bodies having a series of tapered ridges and terminal shoulders that mate with said tapered ridges and terminal shoulders of said outer armature bodies;
- each of said ridges and shoulders having a channel therein mating with said channel of said outer armature bodies;
- said biasing spring retained within said channels of said outer armature bodies and said inner armature bodies;
- wherein said piston assemblies transform rotary motion of said lever to linear motion of said brake pads.
16 more elements
A cable-actuated disc brake for a bicycle, said disc brake comprising:
- a caliper body configured to be attached to a fork of said bicycle;
- said caliper body comprising a brake pad channel;
- a lever comprising a first end having symmetrical lever arms and a second end having a brake cable attachment mechanism;
- said lever pivotable about a pivot axis;
- and
- a pair of symmetric piston assemblies connected to said lever arms of said lever;
- said piston assemblies axially aligned and coaxially spaced about said brake pad channel of said caliper body;
- each of said piston assemblies further comprising an outer armature body and an inner armature body;
- each of said outer armature bodies having a series of tapered ridges and terminal shoulders;
- each of said inner armature bodies having a series of tapered ridges and terminal shoulders that mate with said tapered ridges and terminal shoulders of said outer armature bodies;
- each of said piston assemblies pivotable about said pivot axis;
- each of said piston assemblies in contact with a disc brake pad positioned within said brake pad channel of said caliper body;
- wherein said piston assemblies transform rotary motion of said lever to linear motion of said brake pads.
10 more elements
Dependencies are inferred from the claim text.