Bicycle hydraulic operating device
AssigneeShimano Inc.
InventorsYoshimitsu MIKI, Takafumi NISHINO
Life of this patent
Estimating the term…
Abstract
A bicycle hydraulic operating device is basically provided with a base member, a piston, an operating member, a hydraulic reservoir tank and a diaphragm. The base member includes a cylinder bore. The piston is movably disposed in the cylinder bore. The operating member is coupled to the piston to move the piston within the cylinder bore. The hydraulic reservoir tank is fluidly connected to the cylinder bore. The diaphragm is at least partially disposed inside the hydraulic reservoir tank and divides the hydraulic reservoir tank into a hydraulic fluid chamber and an air chamber. The air chamber is at least partially located closer to the cylinder bore than the hydraulic fluid chamber.
Claims20
A bicycle hydraulic operating device comprising:
- a base member including a cylinder bore;
- a piston movably disposed in the cylinder bore;
- an operating member coupled to the piston to move the piston within the cylinder bore;
- a hydraulic reservoir tank fluidly connected to the cylinder bore, the hydraulic reservoir tank having an open bottom;
- and
- a diaphragm at least partially disposed inside the hydraulic reservoir tank and dividing the hydraulic reservoir tank into a hydraulic fluid chamber and an air chamber, the diaphragm covering the open bottom, the air chamber being at least partially located closer to the cylinder bore than the hydraulic fluid chamber.
A bicycle hydraulic operating device comprising:
- a base member including a cylinder bore;
- a piston movably disposed in the cylinder bore;
- an operating member coupled to the piston to move the piston within the cylinder bore;
- a hydraulic reservoir tank fluidly connected to the cylinder bore;
- and
- a diaphragm at least partially disposed inside the hydraulic reservoir tank and defining a hydraulic fluid chamber inside the hydraulic reservoir tank, the hydraulic fluid chamber being disposed between the diaphragm and an internal surface of the hydraulic reservoir tank, the diaphragm having a fluid passage fluidly connecting the hydraulic fluid chamber to the cylinder bore.
A bicycle hydraulic operating device comprising:
- a base member including a cylinder bore;
- a piston movably disposed in the cylinder bore;
- an operating member coupled to the piston to move the piston within the cylinder bore;
- a hydraulic reservoir tank fluidly connected to the cylinder bore, the entire hydraulic reservoir tank being disposed above the piston in a state where the bicycle hydraulic operating device is mounted to a bicycle;
- and
- a diaphragm at least partially disposed inside the hydraulic reservoir tank and dividing the hydraulic reservoir tank into a hydraulic fluid chamber and an air chamber, the air chamber being at least partially located on an area below the fluid chamber in a state where the bicycle hydraulic operating device is mounted to a bicycle.
Dependencies are inferred from the claim text.