Patent · US Active

Hydraulic coupling

US9624886B2 · kind B2 · utility

1Cited by

4References

11Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Dietmar Schmieder · Markgröningen, DE
Thomas Sebastian · Stuttgart, DE
Andreas Jakobi · Stuttgart, DE

Key dates

Filing date	Sep 25, 2012
Grant date	Apr 18, 2017
Priority date	—
Expiry date	Feb 25, 2033

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M2200/705
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A hydraulic coupling is specified, particularly for fuel injectors, which has a housing pot having a pot bottom and a lateral pot surface, a piston guided axially displaceably in the housing pot, a fluid-filled coupling gap that is provided between the piston and the pot bottom, diaphragm situated on the outer side of the housing pot facing away from the piston, a compensation chamber that is bordered by the diaphragm and flow-connected to the coupling gap, and a spring element acting upon the diaphragm with an axially directed spring force. In order to achieve a low overall stiffness of the hydraulic coupling at the required specified coupling force, the spring element is developed as a spring bracket fixed to the housing pot, which lies against the diaphragm with axial prestressing in the region of the pot bottom.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.