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US 11,041,283 B2Granted
Slurry wall grab having a hybrid drive
AssigneeLiebherr-Werk Nenzing GmbH
InventorFlorian Gabriel
Life of this patent
Estimating the term…
Abstract
A slurry wall grab has a hybrid drive in turn having at least one pulley block, at least one hydraulic actuator, and at least one energy store. The hydraulic actuator and the pulley block open and/or close a grab jaw of the slurry wall grab. The energy store can be charged by actuating the pulley block.
Claims15
A slurry wall grab (1) having a hybrid drive, comprising
- a grab jaw (5),
- a rope pulley block comprising a pair of pulleys (2),
- at least one hydraulic actuator (3),
- at least one energy store (4) for hydraulic fluid in said at least one hydraulic actuator (3),
- a pair of linkages (51), with each said linkage (51) coupled to a respective halve of said grab jaw (5) and also coupled to a first pulley of said pair of pulleys (2), said first pulley arranged to be displaceable towards and away from a second pulley of said pair of pulleys (2) and which is non-displaceable, with said pulleys (2, 2) mounted at different distances from said grab jaw (5), wherein
- the hydraulic actuator (3) is coupled to the displaceably-arranged pulley (2) of the pulley block to open and to close the grab jaw (5) of the slurry wall grab (1),
- the energy store (4) is chargeable by actuating the pulley block (2), and
- the first displaceably-arranged pulley (2) is situated further away from the grab jaw (5) than the second non-displaceable pulley (2).
5 more elements
A slurry wall grab (1) having a hybrid drive, comprising
- a grab jaw (5),
- a rope pulley block comprising a pair of pulleys (2),
- at least one hydraulic actuator (3),
- at least one energy store (4) for hydraulic fluid in said at least one hydraulic actuator (3),
- a pair of linkages (51), with each said linkage (51) coupled to a respective halve of said grab jaw (5) and also coupled to one of said pair of pulleys (2) which is arranged to be displaceable, with said pulleys (2, 2) mounted at different distances from said grab jaw (5), wherein
- the hydraulic actuator (3) is coupled to the displaceably-arranged pulley (2) of the pulley block to open and to close the grab jaw (5) of the slurry wall grab (1),
- the energy store (4) is chargeable by actuating the pulley block (2), and
- the energy store (4) comprises at least one gas accumulator.
5 more elements
A slurry wall grab (1) having a hybrid drive, comprising
- a grab jaw (5),
- a rope pulley block comprising a pair of pulleys (2),
- at least one hydraulic actuator (3),
- at least one energy store (4) for hydraulic fluid in said at least one hydraulic actuator (3),
- a pair of linkages (51), with each said linkage (51) coupled to a respective halve of said grab jaw (5) and also coupled to one of said pair of pulleys (2) which is arranged to be displaceable, with said pulleys (2, 2) mounted at different distances from said grab jaw (5), wherein
- the hydraulic actuator (3) is coupled to the displaceably-arranged pulley (2) of the pulley block to open and to close the grab jaw (5) of the slurry wall grab (1),
- the energy store (4) is chargeable by actuating the pulley block (2), and
- at least one valve (6) is provided to control the hydraulic actuator (3) or the energy store (4).
5 more elements
A slurry wall grab having a hybrid drive, comprising
- a grab jaw (5),
- a rope pulley block comprising a pair of pulleys (2),
- at least one hydraulic actuator (3),
- at least one energy store (4) for hydraulic fluid in said at least one hydraulic actuator (3),
- a pair of linkages (51), with each said linkage (51) coupled to a respective halve of said grab jaw (5) and also coupled to one of said pair of pulleys (2) which is arranged to be displaceable, with said pulleys (2, 2) mounted at different distances from said grab jaw (5), wherein
- the hydraulic actuator (3) is coupled to the displaceably-arranged pulley (2) of the pulley block to open and to close the grab jaw (5) of the slurry wall grab (1),
- the energy store (4) is chargeable by actuating the pulley block (2),
- at least two hydraulic actuators are provided, and
- said actuators (3,3) are laterally arranged on opposite sides of the pulley block (2).
6 more elements
Dependencies are inferred from the claim text.