Mixer drum driving apparatus including a plurality of motors configured to drive an auxiliary fluid pressure pump to rotate
US9726276B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 2013 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Dec 31, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/88
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A mixer drum driving apparatus includes an auxiliary fluid pressure pump that is provided independently of a fluid pressure pump and is capable of supplying a working fluid to a fluid pressure motor so as to cause a mixer drum to perform agitation rotation, a plurality of motors configured to drive the auxiliary fluid pressure pump to rotate, and a control unit that controls rotation of the mixer drum. When an engine is stopped during the agitation rotation of the mixer drum, the control unit drives the auxiliary fluid pressure pump to rotate by operating the plurality of motors selectively in accordance with a load of the mixer drum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.