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US 2014/0150645 A1Published application
Plastic primary piston with insert for a tandem penetration-type master cylinder and a master cylinder equipped with such a piston
AssigneeRobert Bosch GmbH
InventorsLaurent Lhuillier, Daniel Grech, Olivier Bernadat, Marc Rodriguez
Life of this patent
Estimating the term…
Abstract
A primary piston of molded plastic material equipped with a metallic insert and having grooves, mounted in a master cylinder comprising at least a primary piston and a secondary piston mounted in the bore hole of the master cylinder. These pistons can create pressure, respectively, in a primary pressure chamber and in a secondary pressure chamber due to the action of a push rod on the primary piston.
Claims11
1-10. (canceled)
A primary piston for a tandem penetration-type brake master cylinder, comprising:
- a primary piston of molded plastic material and having an overmolded stamped sheet-metal insert situated between a forward cavity and a cavity, and also having at least one groove on the surface emerging on a forward face.
A master cylinder, comprising:
- a master cylinder arrangement;
- and
- at least a primary piston and a secondary piston mounted in a bore hole of the master cylinder arrangement, wherein the primary piston is of molded plastic material and having an overmolded stamped sheet-metal insert situated between the forward cavity and the primary pressure chamber and in that it also has at least one groove on a surface emerging on the forward face.
Dependencies are inferred from the claim text.