Control apparatus

Patent metadata

Field	Value
Publication number	US-10119558-B2
Application number	US-201415026263-A
Country	US
Kind code	B2
Filing date	Sep 24, 2014
Priority date	Oct 15, 2013
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

A control device, in particular for hydraulically controlling components of mobile working machines, has a pressure supply connection (P) and a tank or return connection (T) in addition to two user connections (A, B). Control and/or regulating valves ( 10, 14, 16, 18 ) are connected between the individual connections (P, T, A, B). Two control lines (C, Z) can control at least one of the control and/or regulating valves. A modular-type functional block ( 24, 26 ) is connected to at least one of the control lines (C, Z).

First claim

The invention claimed is:

1. A control device, comprising:
a pressure supply connection;
a tank or return connection;
first and second load connections;
at least one of control valves or regulating valves connected between said supply connection, said tank or return connection, and said first and second load connections;
first and second control lines connected in fluid communication with and controlling said control valves or regulating valves, said first control line being an oil overflow line; and
a modular function block having an input side connected to said overflow line, a first load-sensing line and a second load-sensing line, said overflow line and said first and second load-sensing lines being part of a flange, said modular function block being configured as a pressure limiting valve and controlling said first load-sensing line with a control pressure or being provided with an electromagnetically operable directional control valve having an input port receiving pressure from said second load-sensing line.

2. A control device according to claim 1 wherein said second control line has therein at least one of a safety device against overpressure, a pressure limiting valve, a manually operable shutoff unit, an electromagnetically operable directional control valve or an adjustable flow restrictor.

3. A control device according to claim 1 wherein
said modular function block comprises sensors.

4. A control device according to claim 3 wherein
said sensors comprise at least one of a pressure sensor or a switch position monitor.

5. A control device according to claim 1 wherein
said modular function block is connected within a valve block as an integrated component thereof.

6. A control device according to claim 5 wherein
said modular function block is connectable as a standardized modular unit to said valve block.

7. A control device according to claim 1 wherein
said at least one of control valves or regulating valves comprises a pressure compensator.

8. A control device according to claim 7 wherein
said pressure compensator is an individual pressure compensator.

9. A valve device according claim 1 wherein
said at least one of control valves or regulating valves comprises a multi-port spool valve connected to output sides of said first and second load connections in fluid communication.

10. A control device, comprising:
a pressure supply connection;
a tank or return connection;
first and second load connections;
at least one of control valves or regulating valves connected between said supply connection, said tank or return connection, and said first and second load connections;
first and second control lines connected in fluid communication with and controlling said control valves or regulating valves, said first and second control lines being connectable to one another by a pressure reducing valve on a discharge side of said first and second control lines, said second control line having therein at least one of a safety device against overpressure, a pressure limiting valve, a manually operable shutoff unit, an electromagnetically operable directional control valve or an adjustable flow restrictor; and
different types of safety devices in form of modular-type function blocks specifying a same predefinable flange, said flange providing access to pressure between the pressure reducing valve and two pressure control valves.

11. A control device, comprising:
a pressure supply connection;
a tank or return connection;
first and second load connections;
at least one of control valves or regulating valves connected between said supply connection, said tank or return connection, and said first and second load connections;
first and second control lines connected in fluid communication with and controlling said control valves or regulating valves; and
a tempering function only activatable when in a neutral cycle with no hydraulic load connected to the load connections;
in the neutral cycle, a defined volume flow is passed through all of a plurality of sections of the control device, with the volume flow being fed via an orifice and an open closing element of a valve;
whereby the tempering function is interrupted by signaling a load pressure via a load-sensing line to the closing element of the valve.

Assignees

• Hydac Filtertechnik Gmbh

Inventors

• Biwersi Sascha Alexander
• Hettiger Marcus
• Specks Marcus Simon
• Stoenner Christoph
• Pfeiffer Marcus Karl
• Lautner Erik

Classifications

• F15B2211/8752

  Emergency operation mode, e.g. fail-safe operation mode · CPC title

• F15B2211/8636

  Circuit failure, e.g. valve or hose failure · CPC title

• F15B2211/67

  Methods for controlling pilot pressure · CPC title

• F15B2211/65

  Methods of control of the load sensing pressure · CPC title

• F15B2211/6355

  having valve means · CPC title