US 9,803,657 B2Granted

Hydraulic adjusting device

AssigneeRobert Bosch GmbH

InventorsUdo Froehlich, Sebastian Krug, Ibrahim Doertoluk

Life of this patent

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Abstract

A hydraulic adjusting device, in particular for use in a power plant and/or a wind power plant, includes a double-acting adjusting cylinder that has an adjusting function for a working operation and for a special operation. The double-acting adjusting cylinder is configured to be pressurized with a working pressure medium. In order to satisfy the adjusting function in the special operation, the double-acting adjusting cylinder is further configured to be connected to a pressure medium reservoir that has a pressurized gas isolated from the working pressure medium. The adjusting cylinder has a working chamber configured for the adjusting function of the special operation, the piston area of which is coupled to a piston arrangement of the adjusting cylinder that is configured for the working operation or is configured to be coupled to the piston arrangement.

Claims14

Dependent claims

A hydraulic adjusting device for use in an energy or process engineering installation, comprising:

an adjusting cylinder having a piston arrangement with two piston surfaces that are effective in opposite directions, wherein a first working space is delimited via a first of the two piston surfaces and a second working space is delimited via a second of the two piston surfaces, and wherein the two working spaces are acted upon with a working pressure medium;
a pressure medium accumulator that is connectable to the adjusting cylinder and contains a compressed gas that is separate from the working pressure medium;
and
a compressor device arranged partially in the adjusting cylinder or arranged outside the adjusting cylinder,
wherein the adjusting cylinder has a third working space that is delimited via a third piston surface and is configured to be acted upon with the compressed gas, and
wherein the third piston surface is configured to be coupled to the piston arrangement.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/409,580Filed 31 May 2013
Priority: DE 10 2012 012 14220 Jun 2012
Published: US 2015/0354604 A110 Dec 2015
Granted: 31 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification18 codes

F15B 11/072
Involving features specific to the use of a compressible medium, e.g. air, steam: combined pneumatic-hydraulic systems
F15B 1/022
Installations or systems with accumulators: used as an emergency power source, e.g. in case of pump failure
F15B 11/0725
Combined pneumatic-hydraulic systems: with the driving energy being derived from a pneumatic system, a subsequent hydraulic system displacing or…
F15B 15/1423
Of the straight-cylinder type: component parts; Constructional details