US 2013/0340606 A1Published application

Continuously blockable locking device

OwnerFrank Born, Frank Doffing +5inventors

InventorsFrank Born, Frank Doffing, Thomas Klar, Rolf Mintgen, Gerd Muelhoefer, Timo Schumacher, Wilhelm Schwab

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Abstract

A housing having a first housing end and a second housing end, a substantially cylindrical work chamber formed in the housing, a piston which is arranged in the work chamber so as to be displaceable and which divides the work chamber into a first work space near the first housing end and a second work space near the second housing end, a piston rod which is arranged at one side of the piston and which projects through the first work space and is guided out of the work chamber in a sealed manner at the first housing end through a guiding and sealing device, and a valve chamber which is formed in the housing parallel to the work chamber and in which a first valve assembly and a second valve assembly are arranged. The work chamber is always completely filled with a liquid medium and the valve chamber is at least partially filled with a liquid medium.

Claims42

Dependent claims

A continuously blockable locking device comprising:

a housing having a first end and a second end opposite the first end;
a substantially cylindrical work chamber formed in the housing that is always completely filled with a liquid medium;
a piston displaceably arranged in the work chamber, the piston dividing the work chamber into a first work space proximate to the first end and a second work space proximate to the second housing end;
a piston rod arranged at one side of the piston, the piston rod projecting through the first work space and is sealedly guided out of the work chamber at the first end through a guiding and sealing device;
and
a valve chamber formed in the housing, the valve chamber being substantially parallel to and directly fluidically connected to the work chamber, the valve chamber comprising:
a first valve assembly;
and
a second valve assembly,
wherein the valve chamber is at least partially filled with the liquid medium,
whereby a blocking of a flow of the liquid medium locks the piston.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/973,826Filed 22 Aug 2013
Priority: DE 10 2008 025 559.928 May 2008
Published: 26 Dec 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

F15B 15/26
Other details , e.g. assembly with regulating devices: locking mechanisms
E05C 17/305
Of extensible, e.g. telescopic, construction: with hydraulic locks
F16F 9/56
Details: means for adjusting the length of, or for locking, the spring or damper, e.g. at the end of the stroke
F15B
Systems acting by means of fluids in general