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Title:
VALVE FOR CONTROLLING A HYDROPNEUMATIC DEVICE FOR PRESSURE TRANSMISSION, AND HYDROPNEUMATIC DEVICE FOR PRESSURE TRANSMISSION WITH A VALVE
Document Type and Number:
WIPO Patent Application WO/2013/004388
Kind Code:
A3
Abstract:
A valve is proposed for controlling a hydropneumatic device for pressure transmission with a working plunger and a transmitter plunger for pressure transmission, wherein the transmitter plunger is designed to move the working plunger hydraulically on account of a pneumatic actuation with a comparatively high transmission ratio, wherein the valve has a differential plunger arrangement with a first plunger with a first active plunger surface in a first pressure chamber and a second plunger with a second active piston surface in a second pressure chamber, wherein the first plunger is coupled to the second plunger, wherein the first pressure chamber is provided with a first connection for, for example, a pneumatic return-stroke chamber of the working plunger and the second pressure chamber is provided with a second connection for a pneumatic pressure source which differs from the return-stroke chamber, and wherein, in the case of a predefined pressure difference, the valve switches during a working stroke of the working plunger and loads the transmitter plunger with a transmitter pressure. According to the invention, a third plunger with a third active plunger surface is provided, which third plunger is coupled to the second plunger and has a third pressure chamber which can be loaded with a pneumatic pressure source via a third connection, wherein the valve is such that, in the case of a predefined pressure difference between the first and third pressure chambers, the valve switches and supplies any connected transmitter plunger with pressure from the second pressure chamber.

Inventors:
DIETZEL EBERHARD (DE)
GRESSER MANFRED (DE)
RANKEL ALBERT (DE)
Application Number:
EP2012/002830
Publication Date:
August 22, 2013
Filing Date:
July 05, 2012
Export Citation:
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Assignee:
TOX PRSSOTECHNIK GMBH & CO KG (DE)
DIETZEL EBERHARD (DE)
GRESSER MANFRED (DE)
RANKEL ALBERT (DE)
International Classes:
F15B13/02
Foreign References:
US20050012058A12005-01-20
EP1705411A12006-09-27
DE202004019993U12005-04-21
Attorney, Agent or Firm:
DOBLER, Markus et al. (Berg / Ravensburg, DE)
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