Patent · US Active

Safety valve

US11555555B2 · kind B2 · utility

0Cited by

11References

15Claims

0Family size

Assignee

HOERBIGER FLOW CONTROL GMBH · DE

Inventors

Jochen Schaible · Altensteig, DE
Daniel HALLER · Stuttgart, DE
Sebastian NEISS · Stuttgart, DE

Key dates

Filing date	Dec 11, 2020
Grant date	Jan 17, 2023
Priority date	—
Expiry date	Jan 7, 2041

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF15B2211/855
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A safety valve is provided with an electronic control unit for generating a control voltage. An electro-fluidic preliminary stage has a piezo bending actuator which can be actuated between a working position and a safety position by the control voltage and influences the flow of a secondary control fluid flow depending on its position. A fluid-mechanical main stage has an influencing device for influencing the flow of a primary working fluid flow. The influencing device can be actuated by means of the secondary control fluid flow which flows into a control chamber of the main stage. The control unit caries out a test of the preliminary stage repeatedly in an iterative manner after the expiration of a specified time interval. As part of the functionality test, the position of the piezo bending actuator is changed slightly by varying the control voltage.

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