Patent application number | Description | Published |
20090255750 | STEERING SYSTEM FOR ENGINEERING VEHICLE - A priority valve | 10-15-2009 |
20100228439 | STEERING SYSTEM FOR ENGINEERING VEHICLE - A hydraulic steering unit | 09-09-2010 |
20110276235 | PRIME MOVER REVOLUTION SPEED CONTROL SYSTEM FOR HYDRAULIC CONSTRUCTION MACHINE - A prime mover revolution speed control system for a hydraulic construction machine sets the revolution speed of the prime mover in accordance with the operating state invoked by an operating command and as a result of a determination of an excavation state so that that the revolution speed of the engine can be increased for a heavy load (speedup) in the excavation state. When the control lever is fully operated in the direction of arm crowding, the control lever | 11-10-2011 |
20120291427 | ATTACHMENT CONTROL APPARATUS FOR HYDRAULIC EXCAVATOR - In an attachment control apparatus for a hydraulic excavator having a hydraulic circuit that includes a hydraulic pump, a plurality of actuators having a breaker which is an attachment actuator, and a plurality of flow control valves having an attachment flow control valve that is switched by operation pilot pressure from a control pedal device to supply delivery fluid of the hydraulic pump to the attachment actuator, if the control pedal device is operated in a state where an attachment mode is not selected by an attachment selection device, the movement of the attachment actuator is limited. Thus, failure and reduced life of the attachment and other hydraulic devices can be prevented in the event that an operator has forgotten to switch from a normal mode to an attachment mode and has operated the attachment. | 11-22-2012 |
20130047598 | Hydraulic Control Device for Work Vehicle - A hydraulic control device for a work vehicle includes: a hydraulic pump that supplies pressure oil; an arm drive actuator that drives, with pressure oil supplied from the hydraulic pump, an arm attached to the work vehicle so as to swing the arm; a bucket drive actuator that drives, with pressure oil supplied from the hydraulic pump, a bucket attached to a front end of the arm, so as to swing the bucket; an arm drive pressure oil control valve that controls drive of the arm drive actuator by controlling pressure oil supplied from the hydraulic pump to the arm drive actuator; a bucket drive pressure oil control valve that controls drive of the bucket drive actuator by controlling pressure oil supplied from the hydraulic pump to the bucket drive actuator; an arm operation unit that controls the arm drive pressure oil control valve; a bucket operation unit that controls the bucket drive pressure oil control valve; an operating state detection unit that detects operating states of the arm drive actuator and the bucket drive actuator; and a flow control valve that restricts pressure oil to be supplied to the arm drive actuator as combined operation of the arm drive actuator and the bucket drive actuator is detected via the operating state detection unit. | 02-28-2013 |
20130319787 | CONSTRUCTION MACHINE - On an upper revolving structure, an engine having an exhaust port is mounted. In the midway portion of the exhaust pipe connecting the exhaust port of the engine and an exhaust gas post-treatment device, a first bellows pipe and a second bellows pipe are arranged through a connecting pipe having an L-shaped bending portion. In this case, the first bellows pipe and the second bellows pipe are arranged so as to have a positional relationship in which axis lines thereof (X | 12-05-2013 |
20130343853 | CONSTRUCTION MACHINE - On a rear part side of a revolving frame ( | 12-26-2013 |
20140023473 | CONSTRUCTION MACHINE - On the right front side of a revolving frame ( | 01-23-2014 |
20150016932 | CONSTRUCTION MACHINE - A first accommodating case ( | 01-15-2015 |