Apparatus for selectively positioning movable work element with preselected maximum velocity control
US4852657A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1986 |
| Grant date | Aug 1, 1989 |
| Priority date | — |
| Expiry date | Jul 2, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B63/1117
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Agricultural vehicles have heretofore lacked an adaptive implement hitch control and have correspondingly suffered from poor controllability of the hitch when the mass of the implement is varied significantly. The apparatus employs a sensor connected to and movable with the hitch such that a variable magnitude electrical signal is delivered which corresponds to the instantaneous hitch position. This signal is electronically differentiated to produce a signal indicative of actual hitch velocity. The hitch position and velocity signals are both used as feedback signals to close the control loop of the control and thereby provide an adaptive hitch velocity control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.