About 218 results
Showing the first 200 results.
https://drivepatents.com/patents/958633 · 5 Aug 2015
An electric driving wheel type work vehicle has a traveling motor 21, an inverter 313 for supplying the motor with three-phase power converted from DC power, a pre-driver circuit 312 for supplying a gate signal 316 to the inverter 313 on the basis of an in...
https://drivepatents.com/patents/959576 · 1 Jul 2015
Provided is an electric construction machine adapted to prevent an electric current, after flowing in via a junction at which power transmission systems join together, from flowing into at least one connector to which an external power supply is not connec...
https://drivepatents.com/patents/960923 · 6 May 2015
This invention is a hydraulic work machine having an electric assist motor coupled to an engine and a hydraulic pump, in the hydraulic work machine of which, a rotational speed and torque of the engine are controlled so that an operating point of the engin...
https://drivepatents.com/patents/961294 · 29 Apr 2015
Provided is a construction machine which is capable of suppressing useless power consumption. This construction machine is provided with an excavator body (2), a working device (30) which is attached to the excavator body (2), an engine (22) which is mount...
https://drivepatents.com/patents/961830 · 8 Apr 2015
Provided is a construction machine that can realize the assurance of good vision for an operator sitting in a seat. In a wheeled excavator provided with a upperstructure (2), a seat disposed in a cab (7) mounted on the upperstructure (2), steps (11) arrang...
https://drivepatents.com/patents/951408 · 8 Apr 2015
This invention includes a hydraulic pump (9), a working implement (107) having a lift cylinder (13) driven by a hydraulic fluid supplied from the hydraulic pump (9), an operating device (104) for operating the working implement (107), a traveling motor (7)...
https://drivepatents.com/patents/951312 · 8 Apr 2015
A work vehicle includes: a hydraulic pump (11) driven by an engine (190); a rotational speed detection unit (13) that detects an actual rotational speed of the engine; an exhaust gas purification device (161) that purifies nitrogen oxide in exhaust gas dis...
https://drivepatents.com/patents/951302 · 8 Apr 2015
A work vehicle including a front work device, contains: a variable displacement hydraulic pump (11) that is driven by an engine (190) and supplies pressure oil to an actuator that drives the front work device; an exhaust gas purification device that purifi...
https://drivepatents.com/patents/951611 · 25 Mar 2015
A hybrid construction machine comprises: a motor generator (2) which exchanges torque with an engine (1); a hydraulic pump (3) which is driven by at least one of the engine and the motor generator; a hydraulic actuator (5) which is driven by hydraulic flui...
https://drivepatents.com/patents/951992 · 11 Mar 2015
Three pressure sensors 40, 41 and 42 are provided to detect the delivery pressure of a hydraulic pump 2, the output pressure of an engine revolution speed detecting valve, and the output pressure of a differential pressure reducing valve 11 generating the ...