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US 2014/0109765 A1Published application
Plastic primary piston with stamped sheet-metal functional insert for penetration-type tandem master cylinder and master cylinder equipped with such a piston
AssigneeRobert Bosch GmbH
InventorsLaurent Lhuillier, Daniel Grech, Olivier Bernadat, Mare Rodgiguez
Life of this patent
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Abstract
A master cylinder includes at least one primary piston and one secondary piston installed in the bore hole of the master cylinder, which pistons are used to create pressure. The primary piston has a body of molded plastic material and is equipped with a functional metallic insert which has the shape of a spherical cap capable of accommodating a push rod.
Claims9
1-8. (canceled)
A primary piston for a penetration-type tandem master cylinder, comprising:
- a primary piston body formed by molded plastic material;
- and
- a metallic insert of overmolded stamped sheet metal located between a forward cavity of the primary piston body and a receiving cavity of a push rod, wherein the metallic insert is a spherical cap having contours configured to (i) accommodate the push rod and (ii) center one of a primary spring or a primary spring pack.
A master cylinder, comprising:
- at least a primary piston;
- and
- a secondary piston mounted in a bore hole of the master cylinder;
- wherein the primary piston is made of molded plastic material and equipped with a metallic insert of overmolded stamped sheet metal located between a forward cavity of the primary piston and a receiving cavity of a push rod, and wherein the metallic insert is a spherical cap having contours configured to (i) accommodate the push rod and (ii) center one of a primary spring or a primary spring pack.
1 more element
Dependencies are inferred from the claim text.