Hydraulic accumulator vent and method for making the same

US6390133B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Douglas Patterson · Goose Creek, US
• Gerd Baur · Märkisch Buchholz, DE
• Paul Henry Hanson · Rochester, US

Key dates

• Filing date: May 17, 2000
• Grant date: May 21, 2002
• Expiry date: May 17, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B2201/312
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A hydraulic accumulator assembly for a hydraulic brake system. The accumulator assembly includes a pump housing having therein at least one accumulator bore. The accumulator bore has an axis and an inner wall. A piston is movable within the accumulator bore and divides the accumulator bore into an accumulator chamber, which is communicable with the hydraulic brake system, and a spring chamber. There is a spring in the spring chamber for biasing the piston in the direction of the accumulator chamber. A passageway in the pump housing is closely spaced from the inner wall so as to form a relatively thin wall thickness between the passageway and the inner wall. A vent bore is punched in the inner wall and communicates between the spring chamber and the passageway. The vent bore is punched in a direction away from the axis.