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US 5,632,362 AGranted
Bicycle disc brake
AssigneeRockshox, Inc.
InventorHorst Leitner
Life of this patent
Estimating the term…
Abstract
A disc braking assembly provides a compact, lightweight braking arrangement which utilizes hydraulic fluid to provide greater braking power. Durability and reliability are achieved by use of a compensating chamber and piston having a compensating piston biasing member.
Claims22
A disc brake assembly for a bicycle, comprising:
- a master housing defining a master chamber having a first end and a second end, said master housing adapted to be mounted on a fork of said bicycle;
- a reservoir housing defining a reservoir chamber having a first end and a second end;
- a compensating body mounted within said reservoir chamber, said compensating body and said reservoir chamber cooperating to form a compensating chamber;
- a compensating biasing member distal said compensating body from said second end of said reservoir chamber, said compensating biasing member biasing said compensating body toward said second end of said reservoir chamber;
- a first compensating channel defining a first compensating flow path connecting said master chamber and said compensating chamber;
- a master piston shaft, said master piston shaft mounted at least partially within said master chamber;
- a master piston mounted on said master piston shaft defining a primary chamber between said master piston and said first end of said master chamber;
- a seal between said master piston shaft and said master housing, said seal at least partially defining a secondary chamber between said master piston and said second end of said master chamber;
- a brake piston housing defining a brake piston chamber;
- a brake channel defining a brake flow path connecting said primary chamber with said brake piston chamber;
- a brake piston reciprocally mounted within said brake piston chamber, wherein said master piston shaft is movable from a braking position wherein said first flow path is in communication with said secondary chamber and a release position wherein said first flow path is in communication with said primary chamber.
8 more elements
A disc brake assembly for a bicycle comprising:
- a master housing defining a master chamber having a first end and a second end, said master cylinder adapted to be mounted on a fork of said bicycle;
- a reservoir housing defining a compensating chamber;
- a first compensating channel connecting said master chamber and said compensating chamber;
- a second compensating chamber connecting said master chamber and said compensating chamber;
- a master piston shaft defining an internal path, said master piston shaft mounted at least partially within said master chamber;
- a master piston mounted on said master piston shaft defining a primary chamber between said master piston and said first end of said master chamber;
- a secondary piston mounted on said master piston shaft, said secondary piston at least partially defining a secondary chamber between said master piston and said secondary piston;
- a master piston shaft biasing member receptacle connected to said master chamber;
- a master piston shaft biasing member mounted within said master piston shaft biasing member receptacle biasing said master piston shaft from a braking position wherein said first channel and said second channel are in communication with said secondary chamber toward a release position wherein said first channel is in communication with said primary chamber and said second channel is in communication with said secondary chamber;
- a cable extending through said internal path adapted to be connected to an actuator handle of said bicycle;
- a brake piston housing defining a brake piston chamber;
- a brake channel connecting said primary chamber with said brake piston chamber;
- a brake piston reciprocally mounted within said brake piston chamber.
10 more elements
A disc brake assembly for a bicycle, comprising:
- a bicycle wheel having an axle;
- a disc mounted on said wheel proximate said axle;
- a bicycle fork having a pair of arms straddling said wheel;
- an actuator handle;
- a master housing defining a master chamber having a first end and a second end, said master housing secured to said fork;
- a reservoir housing defining a reservoir chamber;
- a first compensating channel connecting said master chamber and said compensating chamber;
- a second compensating channel connecting said master chamber and said compensating chamber;
- a compensating piston within said reservoir chamber;
- a compensating piston biasing member distal said compensating piston from said first compensating channel;
- a master piston shaft defining an internal path, said master piston shaft mounted at least partially within said master chamber;
- a master piston mounted on said master piston shaft defining a primary chamber between said master piston and said first end of said master chamber;
- a secondary piston mounted on said master piston shaft, said secondary piston at least partially defining a secondary chamber between said master piston and said secondary piston;
- a master piston shaft biasing member receptacle connected to said master cylinder;
- a master piston shaft biasing member mounted within said master piston shaft biasing member receptacle biasing said master piston shaft from a braking position wherein said first channel and said second channel are in communication with said secondary chamber and a release position wherein said first channel is in communication with said primary chamber and said second channel is in communication with said secondary chamber;
- a cable extending through said internal path connected to said actuator handle;
- a stop connected to said cable distal said master piston from said secondary piston;
- a brake piston housing defining a first brake piston chamber and a second brake piston chamber;
- a brake channel defining a brake flow path connecting said primary chamber with at least one of said brake piston chambers;
- a first brake piston reciprocally mounted within said first brake piston chamber;
- a second brake piston reciprocally mounted within said second brake piston chamber;
- a first guide rod secured to one of said housings;
- a first brake pad mounted on said first guide rod;
- a second brake pad mounted on said first guide rod, said first and said second brake pads straddling said disc.
21 more elements
Dependencies are inferred from the claim text.