System implementing parallel lift for range of angles
US8886415B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2011 |
| Grant date | Nov 11, 2014 |
| Priority date | — |
| Expiry date | Jan 17, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/6346
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hydraulic system is disclosed. The hydraulic system may have a pump, a lift actuator, a lift valve arrangement, a tilt actuator, a tilt valve arrangement, and a tilt angle sensor configured to generate a first signal. The hydraulic system may further have at least one operator interface device movable to generate a second signal indicative of a desired lift velocity and a third signal indicative of desired tilt velocity, and a controller. The controller may be configured to command the lift valve arrangement to meter pressurized fluid based on the second signal, command the tilt valve arrangement to meter pressurized fluid based on the third signal and, when the first signal indicates that the actual tilt angle has entered a specified range of tilt angles during lifting, command the tilt valve arrangement to meter pressurized fluid based on the second signal as the actual tilt angle remains within the specified range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.